Extraction of the prior-year (N-1) balance, source chart of accounts, journals, customer / supplier third parties, bank accounts, fixed assets, mapping to the Luxembourg PCN.
Financial Services Luxembourg · licensed accountant · business permit 10077274 · RCS B213987
ODOO-NATIVE ACCOUNTING FIRM
ERP accounting in Luxembourg, run on Odoo
Odoo accounting firm Luxembourg:
Odoo accounting firm Luxembourg:
bookkeeping, VAT, eCDF
and Lux GAAP on Odoo.
A Luxembourg accounting firm that runs your bookkeeping directly inside your own Odoo instance. Lux GAAP set-up, eCDF generation, FAIA export, VAT, payroll, consolidation. Eight industry verticals, from SOPARFI to retail, from SaaS to manufacturing. You keep ownership of the instance; FSL delivers the expertise.
Odoo 17 / 18
Native Lux GAAP
eCDF · FAIA · Peppol
Sage BOB / Winbooks migration
Permit 10077274
Multi-language
FSL · Odoo Production
Stack operated by FSL
One Odoo instance,
12 modules,
Lux compliance.
12 modules,
Lux compliance.
Accounting
Invoicing
Sales
Purchase
Payroll LU
Inventory
Project
Documents
8+
Industry verticals
mastered on Odoo
mastered on Odoo
24+
Odoo modules configured
Lux GAAP, eCDF, FAIA
Lux GAAP, eCDF, FAIA
6wks
Average migration from
Sage BOB or Winbooks
Sage BOB or Winbooks
100%
Instance and data
client-owned
client-owned
Less keying through OCR and automated reconciliation
+real-time financial visibility
eCDF generated natively
FAIA automated AED export
Peppol European B2B invoicing
Multi-language interface and reporting
Our compliance
Permit 10077274/2
Accounting firm (AED)
Permit 10077274/0
Licensed accountant (AED)
RCS B213987
Registered company
LU29299810
Luxembourg VAT
AML / KYC
Law of 12 Nov. 2004
Definition, 01
What is an Odoo accounting firm in Luxembourg, exactly?
An Odoo accounting firm in Luxembourg is a licensed accounting practice that produces the bookkeeping, VAT, annual accounts, eCDF, FAIA and reporting directly inside the client's Odoo environment, with command of both Lux GAAP expertise and the technical set-up of the ERP.
A direct answer, written for search engines, LLMs and busy decision-makers. Three successive layers, from the simplest to the most operational.
01 · Short definition
An accounting firm that runs the books directly on Odoo
An Odoo accounting firm is a licensed Luxembourg accounting practice that produces its clients' accounting and tax obligations (bookkeeping, VAT, payroll, annual accounts, eCDF, FAIA) directly on the Odoo platform. The firm masters both Lux GAAP expertise and the technical set-up of the ERP.
02 · Difference from an integrator
Integrator = installer. Accounting firm = accountable for the books.
An Odoo integrator (Captivea, By-Doo, Account-IT) configures the software and bills the implementation. An Odoo accounting firm runs the bookkeeping, prepares the annual accounts and takes on the professional liability of a licensed accountant, under a business permit issued by the Ministry of the Economy. FSL combines both skill sets in a single team, operating the platform and the accounting sign-off at the same time.
03 · Difference from a firm that “uses Odoo”
You keep ownership of the Odoo instance
Many Luxembourg accounting firms use Odoo internally but give their clients no access to it. FSL reverses the model: the instance belongs to you, the modules belong to you, the data belongs to you. FSL operates through auditable access. If the engagement ends, you keep 100% of the environment.
04 · What FSL delivers in practice
Lux GAAP set-up + monthly operation
First deliverable: initial platform set-up compliant with the Luxembourg PCN (standardised chart of accounts), VAT rates of 17/14/8/3%, statutory journals, eCDF export, FAIA module. Second deliverable: monthly accounting execution, VAT returns, payroll, annual accounts, reporting. A single point of contact, zero three-way coordination.
Ownership and portability
The Odoo instance, the code, the data and the backups belong to you by contract. FSL resells neither licences nor hosting with a hidden margin. If the contract ends, full access is maintained and the transition to any other provider is facilitated within 30 days.
Odoo Lux pricing 2026
~ 20 EUR
Odoo.sh licence
per user/month
per user/month
200-2,500 EUR
FSL fees
per month
per month
2.5-8k EUR
Set-up
initial, one-off
initial, one-off
4-15k EUR
Migration from
Sage/Winbooks
Sage/Winbooks
Intent router, 02
Why outsource your Odoo accounting to an accounting firm in Luxembourg?
Six scenarios cover 95% of the requests FSL receives about Odoo in Luxembourg: outsourcing your accounting, migrating from Sage/Winbooks/Horus, understanding the essential modules, comparing Odoo with other ERPs, configuring Odoo for a specific industry, or simply getting a costed budget.
Six direct entry points aligned with the search intents identified in the Odoo Luxembourg SERP. Click the scenario that matches you and we route you to the relevant operational pillar.
01 / TRANSACTIONAL
Outsource my accounting on Odoo
I want FSL to produce my bookkeeping, VAT, payroll and annual accounts directly on the Odoo instance, with no intermediary.
See the offer →
02 / TRANSACTIONAL
Migrate from Sage BOB, Winbooks or Horus
I use Sage BOB 50, Winbooks or Horus and want to switch to Odoo. Chart of accounts mapping, balance takeover, parallel run, team training.
Migration plan →
03 / INFORMATIONAL
Understand the essential modules
I want to know which Odoo modules to activate for my Luxembourg business, how to configure them for Lux GAAP, and how to generate the eCDF.
Module map →
04 / COMPARATIVE
Compare Odoo, Sage BOB, Winbooks, Horus
I want a neutral Odoo vs Sage BOB 50 vs Winbooks vs Horus matrix, from the viewpoint of a Luxembourg SME or SOPARFI, without marketing.
Costed comparison →
05 / INTENT BY SECTOR
Odoo for my specific industry
I run a fund, an industrial SME, an e-commerce business, a SaaS company or a construction firm. I want the Odoo set-up that fits my flows.
Choose my industry →
06 / COMMERCIAL
Know the real total cost
I want to understand the full bill: Odoo Online or .sh licences, initial set-up, monthly fees, with no hidden cost and no margin on licences.
See the price ranges →
WHY ODOO, 03
Is Odoo compliant with Luxembourg accounting (Lux GAAP, eCDF, FAIA)?
Standardised chart of accounts, Luxembourg VAT rates, eCDF, FAIA, multi-company, multi-currency, multilingual, native Peppol. Odoo is not just another accounting package; it is the operating layer that unifies finance, VAT, payroll, sales and production in a single system.
Luxembourg compliance
Native Lux GAAP
- PCN chart of accounts 7 digits
- VAT rates 17 / 14 / 8 / 3% 2026
- Statutory journals eCDF
- FAIA export AED 780
Real-time visibility
Live dashboards
- Real-time cash position bank feed
- Gross margin by product multi-axis
- DSO and trade receivables aging
- Monthly budget vs actual controlling
Controlled modularity
24 modules, not 80+
- Gradual activation staged
- No over-sizing review
- FSL anti-bloat policy internal
- Reversible uninstall backup
Interoperability
Peppol, Stripe, Banks API
- European B2B Peppol 2030 mandatory
- Bank feeds PSD2 CSSF-licensed
- Stripe, Adyen, GoCardless native
- Open API REST v2
01
Capture
OCR · email · upload
02
Validation
FSL · auditable
03
Entry
PCN · journal
04
VAT / eCDF
XML · CTIE
05
FAIA
AED · 780
06
Reporting
board pack
07
Annual accounts
RCS · 7 months
Industry expertise, 04
Which industries does FSL support on Odoo in Luxembourg?
FSL configures Odoo differently for each of eight Luxembourg industry verticals: funds and SOPARFI, holding and family office, industry and manufacturing, retail and e-commerce, tech and SaaS, construction, services and consulting, hospitality and Horeca. No two industries use the same modules or the same accounting flows.
No two industries use the same modules, the same journals or the same accounting flows. FSL does not deliver a generic Odoo but a configuration native to your business, validated for Lux GAAP and IFRS where needed.
01 · Asset Management
Funds, AIF, UCITS, SOPARFI
Multi-class accounting, NAV calculation, capital calls, distributions, performance fees. Partnership accounting (LP / GP), IFRS translation, CSSF compliance for regulated funds.
- Accounting
- Consolidation
- Documents
- Investor Portal
- Multi-currency
02 · Wealth
Holding, Family Office, UHNWI
Participation exemption (art. 166 LIR), capital gains management, inbound / outbound dividends, intragroup transfer pricing, multi-entity Lux GAAP or IFRS consolidation, multi-currency EUR/USD/CHF/GBP.
- Accounting
- Consolidation
- Multi-company
- Spreadsheet
- Documents
03 · Real economy
Industry, Manufacturing, Metallurgy
Bills of materials (BOM), MRP, lots and serial numbers, forward / backward traceability, cost price (FIFO / weighted average), multi-site, multi-warehouse, cost accounting by cost centre.
- Manufacturing
- Inventory
- Quality
- Maintenance
- PLM
04 · Distribution
Commerce, Retail, E-commerce
Multi-till POS, Odoo e-commerce or connected Shopify, OSS (VAT One-Stop-Shop), multi-shop management, multi-currency, loyalty programme, click & collect, drop-shipping, product variant management.
- POS
- eCommerce
- Inventory
- Marketing
- Loyalty
05 · Growth
Tech, SaaS, Scale-up
IFRS 15 revenue recognition, ARR / MRR management, recurring subscriptions, dunning, international multi-entity (LU HQ + UK/FR/DE subsidiaries), IP Box (LU 80% regime), cost allocation based on OECD TNMM.
- Subscription
- Sales
- Accounting
- Project
- Multi-company
06 · Construction
Construction, building trades, property development
Site-based accounting, progress billing, subcontracting and retention, DPGF, progressive invoices, multi-phase, project accounting on a completed-contract or percentage-of-completion basis, IFRS 15.
- Project
- Timesheets
- Purchase
- Inventory
- Documents
07 · Services
Services, Consulting, Freelance
Timesheets to the quarter hour, time-based or fixed-fee billing, multi-client project management, margin allocation by consultant, expense claims, travel and ITM-related trips.
- Project
- Timesheets
- Invoicing
- Expenses
- CRM
08 · Horeca
Hospitality, Restaurant, Tourism
Restaurant and hotel POS, multi-site, multi-rate VAT (food 3%, beverages 17%, rental 8%), Horeca payroll (specific collective agreement), reservation management, loyalty, meal vouchers and tips.
- POS Restaurant
- Payroll Horeca
- Inventory
- Calendar
- Marketing
My industry is not on this list
FSL also configures Odoo for non-profits (ASBL), foundations, cooperatives, farming companies, pharmacies, medical and legal practices. The rule is the same: native Lux GAAP set-up plus industry modules. Ask for a free review of your case.
Accounting firm deliverables, 05
Which services does an Odoo accounting firm deliver every month?
FSL produces eight accounting firm deliverables directly in Odoo: Lux GAAP bookkeeping, VAT returns, Luxembourg payslips, multi-entity consolidation, controlling and KPIs, corporate tax, directorship and ATAD substance, company formation with a pre-configured Odoo instance delivered. No re-keying, no three-way coordination.
Eight accounting firm deliverables run directly in Odoo, with no intermediate Excel export, no re-keying and no three-way coordination with an integrator.
Lux GAAP accounting on Odoo
Full monthly bookkeeping, internal controls, automatic ledger matching, AI bank reconciliation via PSD2, automatic fixed assets and depreciation, closing entries, annual accounts in eCDF XML format for filing with the RCS (Luxembourg Business Registers).
- PCN chart of accounts
- Statutory journals
- Bank reconciliation
- Fixed assets
- Year-end closing
- eCDF
Luxembourg VAT on Odoo
Multi-rate set-up 17/14/8/3%, intra-EU reverse charge, monthly or quarterly eCDF return, recapitulative statement, OSS (One-Stop-Shop) for European B2C e-commerce, IOSS handling for imports under €150.
- LU rates
- Reverse charge
- Intra-EU
- OSS / IOSS
- eCDF VAT
- Recap statement
Luxembourg payroll on Odoo
Odoo Payroll module configured for Luxembourg rules, automatic RTS and CCSS calculation, cross-border worker handling (BE/FR/DE residents), monthly CCSS declaration, multilingual payslips, ITM certificates.
- RTS
- CCSS
- Cross-border workers
- Meal vouchers
- Time-savings account
- Final settlement
Multi-entity consolidation
Native Odoo multi-company consolidation, Lux GAAP or IFRS restatements, automatic intragroup eliminations, multi-currency translation at average and closing rates, goodwill, minority interests, consolidated statements.
- Multi-company
- Eliminations
- Multi-currency
- Goodwill
- IFRS consolidation
- Consolidated statements
Controlling, KPIs, board pack
Custom Odoo Spreadsheet dashboards, monthly KPIs (EBITDA, margin, DSO/DPO, 13-week cash), budget vs actual, automatically generated PDF board pack, bank covenant alerts, forecast scenarios.
- Monthly EBITDA
- Cash flow 13w
- Budget vs actual
- Board pack
- Spreadsheet
- Alerts
Corporate tax run on Odoo
IRC, ICC and IF tax returns prepared from Odoo data, IP Box (LU 80% regime on IP income), DAC6 reporting, TNMM transfer pricing, ATAD 1 and 2 compliance, financial derivatives declarations.
- IRC / ICC / IF
- IP Box
- DAC6
- Transfer pricing
- ATAD
- Participation exempt.
Directorship, substance, domiciliation via partner attorney
Luxembourg-resident directors, legal secretarial services, RBE management, AGMs, board minutes, ATAD substance file (offices, employees, board in Luxembourg), KYC/AML compliant with the law of 12 November 2004. Domiciliation is provided by our partner attorney, Cerno Law.
- Directorship
- Domiciliation (partner attorney, Cerno Law)
- RBE
- AGM
- Substance ATAD
- KYC/AML
Company formation + Odoo as a package
Incorporation of SARL, SA, SOPARFI, SPF, SARL-S with a pre-configured Odoo instance delivered on D+1. Notary, RCS, bank account opening, VAT and CCSS registrations, Odoo Lux GAAP set-up, team training.
- SARL / SA
- SOPARFI
- SPF
- SARL-S
- Pre-configured Odoo
- 4 to 8 weeks
Odoo module map, 06
Which Odoo modules to activate for a Luxembourg SME?
FSL activates 24 Odoo modules selected from the 80+ available in Enterprise, split into three tiers: 8 core modules (Accounting, Invoicing, Sales, Purchase, Payroll LU, Documents, Spreadsheet, l10n_lu), 5 optional modules depending on use, 11 industry modules depending on the vertical. Anti-bloat policy: fewer modules, more compliance.
A reasoned selection. Not all 80+ Enterprise modules, but the 24 that actually cover Luxembourg obligations and the business flows of the eight verticals. Three tiers: Core (always active), Optional (depending on activity), Sector (depending on industry).
Odoo module
Role and obligation covered
FSL Luxembourg set-up
Tier
Accountingaccount
General ledger accounting, journals, trial balances, annual accounts, eCDF
PCN 7 digits, LU journals, eCDF XML
Core
Invoicingaccount_invoicing
Customer invoicing, payment terms, automatic reminders
LU VAT wording, Peppol, multi-currency
Core
Purchasepurchase
Supplier purchase orders, 3-way match invoice / delivery note / PO, RFQ
Approval workflow, invoice OCR
Core
Salessale
Quotes, orders, built-in CRM, opportunity pipeline
Catalogue, price lists, LU terms
Core
Payroll Localization LUl10n_lu_hr_payroll
Luxembourg payroll, RTS, CCSS, cross-border workers, payslips
Scales 2026, automatic CCSS, ITM
Core
Localization LUl10n_lu
Standardised chart of accounts, VAT rates, eCDF return, FAIA
v18 + FSL customisation
Core
Documentsdocuments
Document management, approval workflow, signature, 10-year archive (law of 19 Dec. 2002)
Workspaces per client, automatic OCR
Core
Spreadsheetdocuments_spreadsheet
Native spreadsheets with live Odoo data, custom reporting
FSL board pack templates
Core
Signsign
eIDAS-compliant electronic signature, contracts, AGMs, minutes
Qualified eIDAS where required
Optional
Projectproject
Project management, tasks, milestones, budget allocation
Multi-client, multi-team
Optional
Timesheetshr_timesheet
Time tracking by project, time-based invoicing
Quarter-hour granularity
Optional
Expenseshr_expense
Employee expense claims, manager approval, reimbursement
ITM categories, LU ceilings
Optional
Subscriptionssale_subscription
Recurring subscriptions, MRR/ARR, automatic renewal, dunning
IFRS 15 recognition
Sector: SaaS
Manufacturingmrp
BOM, routings, manufacturing orders, planning, MRP
Multi-site, FIFO/WAC costing
Sector: Industry
Inventorystock
Multi-warehouse stock, lots, serial numbers, transfers, valuation
Valuation methods, automatic entries
Sector
PoS (Point of Sale)point_of_sale
Retail till, multi-shop, multi-cashier, fiscal printer
LU VAT, Z report, archiving
Sector: Retail
PoS Restaurantpos_restaurant
Restaurant-specific POS, floor plan, kitchen, bill splitting
Multi-rate VAT 3/8/17%, tips
Sector: Horeca
eCommercewebsite_sale
Online shop, baskets, payment, multilingual, SEO
OSS, IOSS, Stripe LU, Mollie
Sector: Retail
Qualityquality
Quality control, control points, non-conformities
ISO workflow, audit trail
Sector: Industry
Maintenancemaintenance
Preventive and corrective maintenance of industrial equipment
MTBF KPI, planning
Sector: Industry
PLMplm
Product Lifecycle Management, BOM versions, ECO
R&D workflow, traceability
Sector: Industry
Studioweb_studio
Low-code customisation, custom fields, views, workflows
Industry-specific adaptations
Optional
Marketing Automationmarketing_automation
Email campaigns, lead nurturing, scoring, segmentation
LU GDPR, double opt-in
Optional
Helpdeskhelpdesk
Customer support, tickets, SLA, knowledge base
Multilingual, automatic escalation
Optional
FSL anti-bloat policy. We install only the modules you need. Every additional module complicates the interface, slows down the database and increases the Odoo bill. The initial diagnostic identifies the 8 to 14 modules that are really useful, never 24, never 80+. The golden rule: fewer modules, more compliance.
Neutral comparison, 07
Odoo vs Sage BOB, Winbooks, Horus: which one to choose in Luxembourg?
Sage BOB, Winbooks and Horus are accounting packages; Odoo is a full ERP. For a single-task accounting firm with no CRM, no stock and no automated payroll, Sage or Winbooks are enough (licence ~€180-250/month). For an SME or SOPARFI combining several flows, Odoo saves real time.
No marketing, no bias. Four accounting packages commonly used by Luxembourg accounting firms, compared on 12 criteria relevant to a Luxembourg SME or SOPARFI. Source: FSL field practice, vendor documentation, user feedback.
Criterion
Sage BOB 50
Winbooks
Horus
Odoo (FSL)
LU standardised chart of accounts
Yes
Yes
Yes
Yes, FSL set-up
Native eCDF (XML)
Yes
Yes
Yes
Yes, FSL validation
FAIA export
Limited
Yes
Yes
Yes, dedicated module
Modules beyond accounting
Accounting only
Accounting + payroll
Accounting + payroll
CRM, sales, stock, MRP, POS, HR, project, e-commerce
Client real-time visibility
Limited portal
Connect portal
Horus Connect
Full access, live dashboards
Multi-currency
Limited
Limited
Yes
Native, automatic ECB rates
Multi-company
One database / company
One database / company
One database / company
Multi-company in one database
Open API / integrations
Paid connectors
Paid API
Limited
Native REST API, open source
Built-in invoice OCR
Add-on module
Third-party add-on
Add-on module
Native AI since v17
B2B Peppol (mandatory 2030)
Roadmap
Yes
Roadmap
Native since v17
Licence cost/month (SME, 5 users)
Vendor price
Vendor price
Vendor price
Per user
Data ownership
Sage hosting
Winbooks hosting
Horus hosting
Client (full export, open source)
When Odoo is not the right answer. If you are a single-task accounting firm with no CRM, no invoicing, no stock and no automated payroll, Sage BOB or Winbooks are enough. If your business combines several flows (sales, stock, project, payroll, e-commerce), Odoo genuinely saves time. FSL advises according to your real profile, not according to our preferred stack. See our detailed comparison of Odoo vs Sage, Winbooks, Horus on 14 criteria with a recommendation by profile.
Migration, 08
How to migrate from Sage BOB, Winbooks or Horus to Odoo in Luxembourg?
A Sage BOB, Winbooks or Horus to Odoo migration takes 7 weeks as standard at FSL, from the review of the existing setup to the stabilised go-live. The cut-over month runs in parallel (old system + Odoo with double entry) so that any discrepancy is detected before the month is closed. Chart of accounts mapping, prior-year (N-1) balance takeover, team training included.
FSL manages the migration end to end. Chart of accounts mapping, takeover of prior-year (N-1) balances, third parties, fixed assets, bank accounts and VAT set-up. Parallel entry during the cut-over month, team training included.
Migration sources we handle
Horus / BOB-X
Format ABC
+ prior-year (N-1) balance takeover
In-house Excel
All formats
+ FSL standardisation
EBP, Ciel
CSV exports
+ chart of accounts redesign
Gesall, Cubic
Proprietary format
+ secure extraction
Parallel entry
During the cut-over month, FSL keeps entries in both systems. No risk of disruption, no lost entry, no late VAT return.
Typical migration timeline · 7 weeks
WK 1
Review of existing setup + mapping
Mapping report
WK 2
Target Odoo set-up
Instance ready
Odoo.sh instance installation (EU hosting), module activation according to the industry profile, Lux GAAP set-up, VAT rates, journals, user configuration.
WK 3
Data import
Data imported
Import of opening balance, third parties, fixed assets, analytical plan, bank accounts, 2-year history, fixed assets with depreciation in progress.
WK 4
Consistency tests
Sign-off tests
Reconciliation of totals between old system and Odoo, VAT tests, payroll tests where applicable, invoice issuing tests, bank feed tests.
WK 5
Team training
Team trained
3 user training sessions: accounting team (4h), sales team (2h), management (1h for dashboards). Videos archived in Odoo Documents.
WK 6
Cut-over in dual-system mode
Parallel run active
Transition month, entries recorded in both systems, daily FSL cross-checks, set-up adjustments in real time.
WK 7
Cut-off and stabilisation
Go-live
Final switch to Odoo, archiving of the old system, first FSL monthly report delivered, first steering committee, final adjustments.
Detailed migration plans by source software
The timeline above is generic. For the method, the detailed chart of accounts mapping and the fixed-fee pricing, see the dedicated pages: Sage BOB → Odoo migration · Winbooks → Odoo migration.
RACI matrix, 09
Client vs Odoo accounting firm responsibilities: the RACI matrix.
FSL runs the bookkeeping, VAT, payroll and tax returns on your Odoo; you keep ownership of the instance and the Odoo licence subscription. Invoice entry is shared (automatic OCR + FSL validation). No grey areas: the RACI matrix is annexed to the engagement letter and is contractually enforceable.
Three roles: you (the client), FSL (the accounting firm operating Odoo) and shared. No grey areas. This matrix is annexed to the FSL engagement letter and is contractually enforceable.
Task
You, the client
FSL
Shared
Ownership of the Odoo instance
100%
–
–
Odoo licence subscription
100%
–
–
Initial Lux GAAP set-up
–
100%
–
Supplier invoice entry
–
–
OCR + FSL validation
Customer invoice issuing
100%
–
–
Bank reconciliation
–
100%
–
Monthly VAT return
–
100%
–
Monthly payslips
–
100%
–
Annual accounts + eCDF
–
100%
–
Tax returns (IRC, ICC, IF)
–
100%
–
Odoo maintenance (updates)
–
–
FSL validates, Odoo SA executes
Daily backups
–
–
Odoo.sh + FSL copy
Enhancements and new modules
Requests
–
FSL recommends, client approves
Pricing, 10
How much does an Odoo accounting firm cost in Luxembourg?
Indicative FSL fixed fees: self-employed €200 to €450/month, SME €500 to €2,500/month, funds and SOPARFI on quote, payroll per payslip according to the published fee grid, initial Odoo Lux GAAP set-up €2,500 to €8,000 one-off, migration from Sage/Winbooks/Horus €4,000 to €15,000 one-off. Odoo licences re-invoiced with no margin.
The Luxembourg market remains opaque. FSL publishes honest ranges by profile. No commission, no kickback on Odoo licences, no abusive long-term commitment. Firm fixed-fee quote within 48h after the review.
Odoo service
Typical profile
Monthly range
Action
Accounting + VAT on Odoo, self-employed2 to 5 users, ~30 entries/month
Consultant, freelancer, micro-business
200 – 450 EUR excl. VAT
Accounting + VAT + payroll on Odoo, SME5 to 20 users, ~150 entries/month
SME, retail, tech, services
500 – 2,500 EUR excl. VAT
Accounting + consolidation + reporting, fund or holdingMulti-entity, multi-currency
SOPARFI, AIF, family office, holding
On quote
Luxembourg payroll on OdooPer employee, CCSS set-up included
All industries
Per payslip, per the fee grid
Initial Odoo Lux GAAP set-upOne-off, delivered at signing
Formation, migration, redesign
2,500 – 8,000 EUR excl. VAT
Sage BOB / Winbooks / Horus → Odoo migration7 weeks, parallel run included
Existing SME migrating its ERP
4,000 – 15,000 EUR excl. VAT
Odoo Online or Odoo.sh licenceBilled directly by Odoo SA
Re-invoiced with no FSL margin
~ 20 EUR / user / month
Our “zero commission” policy. FSL receives no commission from Odoo SA, no commission on re-invoiced licences, no commission on third-party modules. FSL's margin comes exclusively from the accounting and tax expertise it invoices. Official Odoo prices are published at odoo.com/pricing and are directly accessible to the client. This transparency is annexed to every engagement letter.
Fixed fees, verifiable against the published rate card. All FSL Odoo fixed fees are fixed for 12 months. If volume overruns on a seasonal business, FSL absorbs it without surcharge; if volume increases structurally (for example +50%), a transparent amendment is signed for the following financial year. Out-of-scope work is billed at the published hourly rates of rate card V4.5, never at a private rate.
AI layer, 11
How to automate your Odoo accounting with AI in Luxembourg?
FSL combines Odoo's native REST API with specialised AI models along three axes: invoice OCR with automatic classification to the Luxembourg PCN account, AI bank reconciliation via PSD2 with CSSF-licensed banks, and monthly generation of a custom PDF board pack. Always with FSL human validation before any accounting entry.
Odoo exposes a native REST API. FSL combines it with specialised AI models to automate what should be automated, without ever replacing the human signature. Three automation axes, all operable on your instance.
★ AI pillar · FSL Lab
OCR + extraction
Invoice capture, classification, automatic accounting entry
Your suppliers send their invoices to a dedicated email address. The OCR extracts the net amount, VAT, total, IBAN, due date and references. The AI engine proposes the ledger account and the VAT code. FSL validates in one click. The entry is posted. Average time per invoice: 7 seconds.
- Multi-format extraction (PDF, image, email)
- PCN account + LU VAT code suggestion
- Automatic 3-way match validation (PO / delivery note / invoice)
- 10-year archiving in Odoo Documents
- Full audit trail, AED-compliant
Bank Feed
AI bank reconciliation
Match bank feeds automatically
Secure PSD2 connection to Luxembourg banks (BIL, BCEE, BGL, ING, BCL, Raiffeisen, Revolut Business). The engine matches each bank movement with the corresponding invoice, proposes difference entries and flags unusual transactions.
- PSD2 compliant, CSSF-licensed
- Multi-account, multi-currency
- Automatic matching suggestion
Reporting
Custom AI board pack
Monthly reports generated in 4 minutes
On the 5th of the month, your PDF board pack is generated: financial indicators, margin, cash, DSO, covenant alerts, prior-year comparison, management commentary. Customised to your brand guidelines. Distributed automatically to your board of directors.
- Custom PDF template
- Automatic email distribution
- Commentary generated and validated by FSL
Objections handled, 12
Migrating to Odoo: 9 common objections and their answers.
Nine recurring concerns of Luxembourg managers before an ERP change, all addressed: Odoo SA's longevity, team training, complexity of flows, data loss during migration, auditor acceptance, changes in FSL fees, invoice branding, GDPR compliance, time to go live.
Nine recurring concerns of Luxembourg managers facing an ERP change. Straight answers, no jargon.
Q
“What if Odoo SA raises its prices or disappears?”
A
Odoo is open source, with its code available on GitHub. The instance can be migrated to a third-party EU host in 48h. FSL keeps a mirror copy of your database. Dependence on Odoo SA is lower than on Sage, Winbooks or Horus, which are closed proprietary products.
Q
“My team will lose 3 months in training”
A
The Odoo interface is deliberately minimalist. Business users (sales, purchasing, HR) become autonomous in 2h. The intensive accounting team needs 8 to 12h in total over 2 weeks, in short sessions rather than one massive day.
Q
“Odoo is too simple for my complex flows”
A
False. Odoo handles multi-company, multi-currency, multi-warehouse, MRP, IFRS 15 and consolidation. FSL has deployed Odoo for SOPARFI with 47 entities and industrial SMEs with 8 sites. The interface is simple; the engine is not.
Q
“I will lose my data during the migration”
A
During the cut-over month, entries are recorded in parallel in the old system and in Odoo. FSL reconciles daily. If an entry is missing, it is posted within 24h. No client has lost an entry in the migrations FSL has carried out since 2021.
Q
“My auditors do not know Odoo”
A
A statutory auditor (réviseur d'entreprises) works from supporting documents and standard exports, whatever the software. FSL delivers a standardised auditor file: auditors' trial balance, FAIA, journals by period, read-only access to the instance, direct technical support. No audit has been rejected on any FSL engagement.
Q
“What if FSL becomes too expensive in 2 years?”
A
The Odoo instance belongs to you. You can change accounting firm within 30 days; FSL hands over the full access, the set-up and the documentation. No exit cost, no contractual lock-in. This is our written commitment in the engagement letter.
Q
“My customer invoices must keep my design”
A
The Studio module lets you customise the invoice template with your brand guidelines (logo, colours, legal notices, IBAN, terms). FSL delivers the configured template as part of the initial set-up. Invoices go out as PDF, Peppol XML, or both depending on the recipient.
Q
“GDPR and data hosting?”
A
Odoo.sh hosts your instance; the hosting region is confirmed in the contract. Data stays in the EU. The Odoo DPA is GDPR-compliant. FSL signs an additional DPA with you, clearly identifying the sub-processors and their jurisdictions.
Q
“How long before I am operational?”
A
Company formation + Odoo delivered: 4 to 8 weeks (tied to the RCS and banking timetable). Migration from Sage/Winbooks/Horus: 7 weeks. Internal redesign of a poorly configured Odoo: 4 weeks. FSL provides a firm timeline before signature.
Definitions
Odoo, ERP, PCN 2020, eCDF, FAIA, Peppol: the definitions that matter.
Ten terms come up in any discussion of business software in Luxembourg. Each is defined here in a self-contained sentence, then elaborated, with a link to the official source or the vendor's documentation where one exists.
- Odoo
- Odoo is an open-source business management software suite of Belgian origin, organised in modules that you activate as needed: accounting, invoicing, sales, purchasing, stock, production, projects and payroll. Created in 2005 under the name TinyERP, then OpenERP, it has been called Odoo since 2014. Its distinguishing feature is that these modules coexist on a single database, which removes re-keying between tools.
- ERP
- An ERP, or enterprise resource planning system, is software that brings a company's management functions together on a single database : accounting, purchasing, sales, stock, production and human resources. What sets it apart from accounting software is scope: accounting software records transactions, whereas an ERP generates them at source and then posts them automatically.
- Odoo Community, Enterprise and Odoo.sh
- Odoo Community is the free open-source edition, Odoo Enterprise the licensed edition, and Odoo.sh the official hosting platform. For a Luxembourg company, the tax localisation, the generation of VAT returns in XML and the FAIA export belong to the Enterprise offer. Community remains free but requires third-party modules and in-house technical maintenance.Source: Official Odoo pricing
- PCN 2020
- The PCN 2020 is the Luxembourg standardised chart of accounts, applicable to commercial companies since 1 January 2020, replacing the PCN 2009. It sets the numbering and the titles of the accounts used to prepare the annual accounts. Software that still uses the old chart produces statements that cannot be filed.Source: Accounting Standards Commission (CNC)
- eCDF
- The eCDF is the Luxembourg State's platform for collecting financial data, operated by the CTIE. VAT returns, structured annual accounts and filing with the RCS (Luxembourg Business Registers) go through it in a standardised XML format. Odoo exports monthly, quarterly and annual returns in this format.Source: eCDF platform
- FAIA
- The FAIA is the Luxembourg version of the SAF-T format, a standardised XML file containing all the entries of a period, which the Registration Duties, Estates and VAT Authority (AED) may require during an inspection under the AED FAIA specifications. Its generation depends on how complete the third-party records and the chart of accounts are.Source: Registration Duties, Estates and VAT Authority (AED)
- Peppol
- Peppol is a European network for exchanging structured business documents, managed by the OpenPeppol association and adopted by Luxembourg as the channel for receiving public sector invoices. The applicable format is Peppol BIS Billing 3.0, based on UBL 2.1 and aligned with the European standard EN 16931.Source: Odoo documentation, e-invoicing
- Fiscal position
- A fiscal position is an Odoo rule that automatically substitutes a VAT rate and account depending on the customer's or supplier's profile. Correctly configured, it applies the reverse charge to a taxable person in another Member State and the exemption to a customer outside the Union, without user intervention. Badly configured, it distorts the whole return.Source: Odoo documentation, Luxembourg localisation
- Reverse charge
- The reverse charge transfers the payment of VAT to the customer when the customer is a taxable person established in another Member State. The invoice then carries a 0% rate and the corresponding legal mention, after the customer's VAT number has been checked in the VIES database at the date of the transaction.
- Lux GAAP
- Lux GAAP is the Luxembourg accounting framework, derived from the amended law of 19 December 2002 on the trade register and company accounting. It governs the presentation of the annual accounts, the valuation methods and the filing obligations, separately from IFRS.Source: Guichet.lu, accounting obligations
Pillar FAQ, 13
Odoo Luxembourg FAQ: 14 frequently asked questions.
14 questions categorised by search intent, marked up as FAQPage Schema.org for reading by answer engines and citation by LLMs. Five families: understanding the Odoo accounting firm (4 Q), Odoo Lux GAAP set-up (3 Q), migration from your current software (3 Q), pricing and commitment (2 Q), security and data ownership (2 Q).
Answers structured by search-intent category. The FAQPage Schema.org markup lets Google extract these answers, answer engines surface them and LLMs cite them.
Understanding the Odoo accounting firm
What is an Odoo accounting firm in Luxembourg? +
An Odoo accounting firm in Luxembourg is an accounting practice that keeps its clients' books directly in their Odoo instance, instead of re-keying them in its own software. It masters both Luxembourg accounting and the platform set-up. In practice, the firm masters both the Lux GAAP expertise (standardised chart of accounts, eCDF, FAIA) and the technical set-up of Odoo (modules, journals, taxes, legal exports). The client keeps ownership of their Odoo instance and gets real-time visibility of their business. This is the FSL model.
What is the difference between an Odoo integrator and an Odoo accounting firm? +
The difference between an Odoo integrator and an Odoo accounting firm is one of responsibility: the integrator configures and maintains the software, the accounting firm produces the official accounts and takes responsibility for them. An integrator does not prepare your annual accounts and is not answerable for them. An Odoo accounting firm runs the bookkeeping on Odoo, prepares the annual accounts and takes on the professional liability of a licensed accountant, under business permit no. 10077274 issued by the Ministry of the Economy. FSL combines both skill sets in a single team, without three-way coordination.
Why choose Odoo over Sage BOB or Winbooks? +
Choosing Odoo over Sage BOB or Winbooks makes sense when your business goes beyond pure accounting: Odoo brings invoicing, sales, purchasing, stock, projects and payroll onto the same database, where specialised accounting packages require third-party tools and re-keying. Odoo is a full ERP that includes CRM, sales, purchasing, stock, payroll, projects, e-commerce and accounting. For a single-task accounting firm, Sage is enough. For an SME or SOPARFI combining several flows, Odoo saves time by removing re-keying between tools. See our comparison matrix in section 07.
Is FSL an official Odoo partner? +
FSL is not a reseller of Odoo licences and receives no vendor commission. We act as a licensed accountant inside your instance, in coordination with your integrator or one of our partners; FSL takes no margin on licences and therefore has no interest in which software you choose. FSL is an Odoo-native accounting firm, meaning that its accountants master the platform set-up but bill only their accounting and tax expertise, with no margin on licences. It is a choice of transparency.
Odoo Lux GAAP set-up
Is Odoo suited to Luxembourg accounting? +
Odoo is suited to Luxembourg accounting: its localisation installs the PCN 2020 chart of accounts, the four VAT rates, the fiscal positions, the generation of VAT returns in XML for the eCDF and the FAIA export. Odoo supports the Luxembourg standardised chart of accounts (PCN), VAT rates of 17/14/8/3%, the eCDF return, the FAIA export for the AED, multi-currency management and multi-company. The initial set-up is critical. A poor set-up generates cascading errors over 12 months. This is what FSL brings in place of a simple integrator: Luxembourg accounting expertise built into the set-up.
Does Odoo generate the Luxembourg eCDF and FAIA? +
Odoo generates the Luxembourg eCDF and FAIA natively: monthly, quarterly and annual VAT returns export in XML for filing on the eCDF platform, and the FAIA file, the Luxembourg version of SAF-T, exports from the accounting report. Odoo natively generates the eCDF return (balance sheet, profit and loss account) in the XML format expected by the CTIE and the RCS. For the FAIA export (Computerised Audit File), a dedicated Odoo module ensures compliance with AED FAIA specifications. FSL checks the compliance of each export before filing and keeps an archived copy for 10 years.
Which Odoo modules are essential for a Luxembourg SME? +
The essential Odoo modules for a Luxembourg SME are Accounting for bookkeeping, VAT and the eCDF, Invoicing for invoices and Peppol, Sales for quotes and CRM, and Purchase for purchasing. Industry modules are then added depending on the business. Industry modules by activity: Inventory + MRP (manufacturing), POS + eCommerce (retail), Project + Timesheets (services), Subscription (SaaS). See our map of the 24 modules in section 06.
Migration from your current software
Can you migrate from Sage BOB, Winbooks or Horus to Odoo with FSL? +
Migrating from Sage BOB, Winbooks or Horus to Odoo with FSL is possible from each of these packages, as well as from Excel or a foreign tool. Each source has its own extraction protocol and its own mapping to the PCN 2020 chart of accounts. FSL handles migrations from Sage BOB 50, Winbooks, Horus and Excel to Odoo. The migration includes chart of accounts mapping, import of prior-year (N-1) balances, takeover of third parties, bank accounts, fixed assets and VAT set-up. Average duration 6 to 8 weeks, with parallel entry throughout the cut-over month. See the detailed timeline in section 08.
What happens to my accounting history after migration? +
After migration, your accounting history is carried over for two financial years in Odoo, balances and general ledger, so that the current and previous years can be compared. Supporting documents remain archived in the old software for the ten years required by law. Historical supporting documents stay stored in the old system, archived read-only for 10 years (Luxembourg requirement). FSL provides read access to auditors on request, without reactivating a licence.
How long does a migration to Odoo take? +
A migration to Odoo takes seven weeks as standard, from the review of the existing setup to a stabilised go-live. The cut-over month runs in parallel, with simultaneous entry in both systems, so that any discrepancy is detected before the month is closed. The cut-over month runs in parallel (old system + Odoo) so that any discrepancy is detected before the month is closed. Migration can be accelerated to 4 weeks for a company formation, where there is no historical data to carry over.
Pricing and commitment
How much does accounting on Odoo cost in Luxembourg? +
Accounting on Odoo in Luxembourg costs between €200 and €2,500 excl. VAT per month at FSL, depending on entry volume and the number of companies, plus the initial set-up and the Odoo licence re-invoiced at the vendor price. Self-employed €200 to €450, SME €500 to €2,500, funds and SOPARFI on quote, payroll per payslip according to the published fee grid. The initial Odoo Lux GAAP set-up ranges from €2,500 to €8,000 depending on complexity (multi-company, multi-currency, industrial modules). No Odoo licence resold, full transparency on platform cost. See the details in section 10.
Does FSL resell Odoo licences with a margin? +
FSL never resells Odoo licences with a margin: they are re-invoiced to you at the vendor price, to the euro, or subscribed directly in your name with Odoo. Our remuneration covers only the set-up and the bookkeeping. This is our “zero commission” policy. The Odoo Online or Odoo.sh licence is billed directly by Odoo SA at the public price (~€20/user/month). FSL re-invoices at cost with no margin, or lets the client subscribe directly if preferred. This transparency is annexed to the engagement letter.
Security and data ownership
Does the Odoo instance really belong to me? +
Your Odoo instance belongs to you without reservation: the subscription is opened in your name, the data is yours, and all access is handed over to you within thirty days if you decide to leave, with no exit fee. You are the contractual owner of the Odoo instance, the data and the modules. FSL operates on your instance with auditable access. If the contract ends, you keep 100% of the environment, with no data retention. You can switch to any other accounting firm: FSL hands over the full access and retains no data.
Odoo Online, Odoo.sh or Odoo on-premise in Luxembourg? +
Among Odoo Online, Odoo.sh and Odoo on-premise in Luxembourg, Odoo.sh suits most SMEs: European hosting, database access and the option of custom modules. Odoo Online is simpler but less flexible; on-premise is justified by specific sovereignty requirements. Odoo.sh (PaaS) suits 80% of FSL cases: custom modules possible, staging environments, daily backups, EU hosting in Belgium. Odoo on-premise remains recommended only for regulated structures (banks, CSSF funds) with sovereignty constraints. FSL advises according to your risk profile.
Local presence, 14
Where to find an Odoo accounting firm physically in Luxembourg?
Physical office at 142 Boulevard de la Pétrusse, L-2330 Luxembourg. On-site visits in Esch-sur-Alzette (Belval), Strassen and Bertrange (Cloche d'Or), and cross-border trips to Arlon, Thionville, Trier and Saarbrücken. 100% remote onboarding and operation available via Teams for international entrepreneurs.
Physical address at 142 Boulevard de la Pétrusse, accessible from across the country and the Greater Region. Visits also in Esch-sur-Alzette, Pétange, Strassen and across the BE/FR/DE border for on-site Odoo reviews.
HQ Luxembourg City
142 Boulevard de la Pétrusse, L-2330 Luxembourg. View over the Pétrusse, visitor parking.
In-person meeting or TeamsEsch-sur-Alzette
Southern Luxembourg, Belval-Université, industrial and tech ecosystem.
On-site reviewsStrassen, Bertrange
Western business district, Cloche d'Or and logistics centres.
On-site reviewsBE / FR / DE border
Arlon, Thionville, Trier, Saarbrücken. Cross-border workers and cross-border groups.
Video call + travel100% remote
The whole Odoo service can be delivered by video call. Teams onboarding, ongoing support, reviews via screen share.
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Go further with Odoo in Luxembourg
The Odoo pages of Financial Services Luxembourg, licensed accountant: integration, configuration, VAT, migration and e-invoicing.
Ready to run your accounting on Odoo, without three-way coordination?
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