Prepaid expenses in Luxembourg: the pro rata rule

What are prepaid expenses in Luxembourg?

Prepaid expenses in Luxembourg are charges booked during the financial year that relate to one or more later financial years: the amended law of 19 December 2002 places them under the assets-side item "Comptes de régularisation" of the balance sheet, from which they are released as a charge in the year they actually belong to.

The Luxembourg vocabulary is not the textbook one. The standard chart of accounts does not use those names: it calls the two accounts charges à reporter and produits à reporter, charges and income carried forward, and the balance sheet groups them under the single heading "Comptes de régularisation", the regularisation accounts. Both sets of words describe the same operation, carrying an already recorded payment or receipt into the year it covers, and the label used in the chart of accounts changes nothing in the treatment.

Deferred income is its exact mirror on the other side of the balance sheet. The liabilities-side item of the same name must carry income received before the balance sheet date but attributable to a later financial year: rent collected in December for the following quarter, a service paid for before it is performed. The company holds the cash; it does not yet hold the income.

The basis is the same on both sides and fits in one line of accounting law. The law requires account to be taken of charges and income relating to the financial year the accounts refer to, regardless of the date those charges and income are paid or collected. Cash therefore commands nothing: neither the transfer date nor the invoice date settles the year, only the period the expense covers does. It is the same mechanism, run in reverse, as the one governing accruals and accrued income.

How is a prepaid expense calculated pro rata temporis?

A prepaid expense in Luxembourg is calculated pro rata temporis: the invoiced amount is spread over the period it covers, and the fraction running into the following financial year or years is carried to assets.

Three inputs are enough, and none of them is in the general ledger. The first is the period covered, which is read in the contract and not on the bank statement line. The second is the amount to be spread, net of recoverable tax. The third is the closing date, which cuts that period in two. An expense whose covered period is not documented cannot be carried forward: without a dated contract, the allocation cannot be recomputed by a third party, and the carry-forward becomes an assertion.

The split is made in days or in months depending on how precise the document is, and the choice must stay constant from one year to the next.

An insurance premium of 4,800 euros covering the period from 1 July of one year to 30 June of the next splits into two equal halves where the closing date is 31 December: one half stays as a charge of the year, the other moves to the assets-side regularisation item and becomes a charge again on the first day of the following year. The same arithmetic applies to a multi-year contract, since the text covers charges relating to one or more later financial years.

The carry-forward follows the period covered, not the expected useful life nor the pace at which the service is consumed. A twelve-month software licence activated in October is spread over twelve months, even where the company only starts using it in February. The criterion is contractual, not operational.

Where do these regularisations sit in the Luxembourg balance sheet?

In the Luxembourg balance sheet, prepaid expenses sit under the assets-side item "Comptes de régularisation", ranked E, and deferred income under the liabilities-side item of the same name, which the layout in force since 2016 ranks D.

The grand-ducal regulation of 18 December 2015 determines the form and content of the balance sheet and profit and loss account layouts, applicable to financial years beginning on or after 1 January 2016, and question and answer 16/010 of the Commission des normes comptables sets out the practical consequences, among them the renumbering of the liabilities-side regularisation item, which carried the letter E in the previous layout. The balance sheet total itself is made up of the total value of items A to E of assets: the regularisation item is part of it.

A prepaid expense that is not carried forward disappears from assets and lowers the balance sheet total by the same amount, while that total is one of the three criteria setting a company's size category and, with it, the right to an abridged balance sheet or the duty to have the accounts audited. Those categories and their thresholds are set by law and are measured over two consecutive years, and the line is drawn when the annual accounts are prepared. A neglected cut-off therefore shifts more than a result: it shifts a category.

The notes take over once the amounts weigh. The law requires income and charges relating to the year but receivable or payable after its closing date to be detailed there where they are of a certain significance. A material multi-year carry-forward is commented on; it is not left to be guessed from a single balance sheet line. Within a group, those conventions are cross-checked at consolidation, where a different split from one entity to another shows at once.

Which account of the standard chart of accounts applies?

In Luxembourg, year-end regularisations sit in heading 48 of the standard chart of accounts, named "Comptes de régularisation": account 481 carries charges to be carried forward, account 482 income to be carried forward, and no other account is meant to host them.

The structure is stable from one version of the chart to the next. The standard chart of accounts annexed to the grand-ducal regulation of 10 June 2009 already carries heading 48 and its two subdivisions, and the draft regulation published by the Chamber of Commerce keeps the same architecture. The chart applicable to financial years beginning on or after 1 January 2020 is however the one determined by the grand-ducal regulation of 12 September 2019, whose annex is not readable from our editorial environment: the numbering above must be cross-checked against that text before any chart of accounts is configured.

One boundary is worth drawing before opening account 481. Formation expenses are not charges to be carried forward: they form a separate asset item, reserved for expenses connected with the creation or the extension of an undertaking, as opposed to day-to-day management expenses. Their regime is stricter, since they must be written off within a maximum of five years, since any distribution of results is prohibited for as long as they are not fully written off unless available reserves and profits brought forward at least match the unamortised amount, and since the items recorded under that heading must be commented on in the notes.

Loan issue costs follow that second logic rather than the carry-forward one. The draft regulation on the standard chart of accounts published by the Chamber of Commerce places them in heading 20, under account 204, among formation and similar expenses, with a matching expense account. A spread loan cost is therefore not a charge to be carried forward: the two items live neither in the same place of the balance sheet nor under the same regime.

Prepaid expense or accrual: two mismatches running opposite ways

A prepaid expense and an accrual are two mismatches running opposite ways in Luxembourg: the first is an already invoiced expense belonging to the following year, the second an expense of the closed year that nobody has invoiced yet.

The difference shows in the balance sheet before it shows in the result. The prepaid expense is an asset, because the company has paid or committed for a service it has not yet received; the accrual is a liability, because the service has been received and payment is still due. Mixing the two does not produce a symmetrical error: it inflates one side of the balance sheet and empties the other, and the result is shifted twice.

A provision is never the right answer for an expense already paid. Its purpose is to cover a loss or a liability that is probable, or certain but undetermined as to its amount or as to the date on which it will arise. An expense paid in advance carries none of those uncertainties: its amount is on the invoice, its period is in the contract.

There is nothing to provide for, only something to carry forward. The direction of the mismatch is read on the document: a tax declared and settled after the quarter it covers, such as the SPF subscription tax, is an accrual at the closing date and not a prepaid expense.

Is a prepaid expense deductible in the year it is paid?

A prepaid expense is not deductible in Luxembourg in the year it is paid: the Guichet.lu portal states that only general overheads relating to the current financial year are deductible, and that a company cannot therefore deduct, for year N, overheads relating to years N+1 and later.

The tax rule simply follows the accounts here, through the link between the tax and commercial balance sheets. Article 40 of the amended law of 4 December 1967 on income tax requires that, where the tax valuation rules do not call for a given amount, the tax balance sheet keep the values of the commercial balance sheet or come as close to them as those rules allow. A correct carry-forward therefore produces the correct tax base directly, and an omitted one ends up in the return with no adjustment to catch it.

The same article 40 also governs what happens to an error found too late. The position existing at the closing date of the operating year is decisive for the year-end valuation, the operator being free to take account of facts arising after that date but before the balance sheet is drawn up. A balance sheet that does not comply with the prescriptions may be rectified, a compliant one may be modified for serious economic reasons, but one that has served as the basis for an assessment may no longer be, save for exceptions. In other words, the window to correct a forgotten carry-forward closes with the tax assessment.

VAT, for its part, does not follow the same rhythm. The right to deduct arises when the tax becomes chargeable, its exercise requires holding a compliant invoice, and where an instalment is paid before the supply of goods or services is made the tax becomes chargeable on collection, up to the amount collected. An expense spread over two financial years in the accounts is therefore deducted in one go for VAT: the amount carried to account 481 is the amount net of deductible tax, never the amount inclusive of tax. That mismatch is handled in the VAT return for the period, not in the regularisation account.

Which mistakes do we see on prepaid expenses?

Three mistakes recur in files taken over: the annual subscription expensed in one go, the carry-forward never released at the following opening, and recoverable tax left inside the amount carried forward.

The first has become the most frequent with online service contracts. Licences, hosting, tool subscriptions, insurance policies and maintenance contracts are nearly all settled twelve months in advance, on a date that does not coincide with the closing date, and we regularly see trial balances where none has been regularised.

The remedy is not a general review but a closing list kept in advance: annual and multi-year contracts, renewal dates, rent and service charges settled quarterly, insurance premiums, royalties, membership fees. A dozen lines cover almost every carry-forward of an ordinary trading company, and that list is the one we keep with the client in our licensed accountant engagement.

The second is quieter and lives longer. A carry-forward never released at the opening of the following year leaves in assets an expense that no longer has a purpose, and the matching charge is recorded nowhere: the balance sheet is weighed down by a fictitious asset while the following year's result is overstated. The check fits in one line, and it is run at the opening rather than at the closing: the balance of account 481 on the first day of the year must be released in full as a charge over the period it covers, and any residual balance must be justified by a contract still running.

The third is purely technical and is fixed in the settings. Carrying forward an amount inclusive of tax where the tax has been deducted in the return for the period amounts to carrying forward a charge that does not exist, and the gap only shows when the deductible tax account is reconciled with the returns filed.

The useful habit is to feed the regularisation account only from the amount already net of recoverable tax, and to let VAT follow its own timeline. These three checks are part of the year-end close the firm takes over, from EUR 250 excl. VAT per month for a company, under the schedule published on the fees page.

Sources and verification

Written for Financial Services Luxembourg and reviewed before publication by Mickaël LOC, licensed accountant (authorisation 10077274). The content of the two regularisation items, the principle attaching charges and income to the financial year, the composition of the balance sheet total, accounts 481 and 482 of the standard chart of accounts, the regime of formation expenses, the non-deductibility of overheads of later years, the link between the tax and commercial balance sheets and the moment the right to deduct VAT arises were verified on 20 October 2026 against the sources below.

The sources consulted are the following. From Legilux, the amended law of 19 December 2002 on the trade and companies register and on the accounting and annual accounts of undertakings. It was read for the assets-side item "Comptes de régularisation" carrying charges booked during the year but relating to one or more later financial years, for the liabilities-side item of the same name carrying income received before the balance sheet date but attributable to a later financial year, and for taking account of charges and income relating to the financial year regardless of their date of payment or collection.

It was read as well for the balance sheet total being made up of items A to E of assets, for the size criteria and the referral of the abridged balance sheet to a grand-ducal regulation taken on the opinion of the Commission des normes comptables, for the disclosure in the notes of income and charges of the year receivable or payable after its closing date where they are of a certain significance, and for formation expenses, their write-off within a maximum of five years, the ban on distribution for as long as they are not written off and their mandatory comment in the notes.

Also from Legilux, the grand-ducal regulation of 18 December 2015 determining the form and content of the balance sheet and profit and loss account layouts. From the Commission des normes comptables: its question and answer 16/010 on the 2016 balance sheet and profit and loss account layouts, for their application to financial years beginning on or after 1 January 2016 and for the renumbering to D of the liabilities-side regularisation item; the standard chart of accounts annexed to the grand-ducal regulation of 10 June 2009 which it publishes, for heading 48 and accounts 481 and 482.

From the Guichet.lu portal: its page on methods for the preparation of annual accounts, for the general rules of the Luxembourg accounting framework and the attachment principle; its page on operating profit, for the deductibility of general overheads relating to the current year only and the impossibility of deducting in N the overheads of years N+1 and later; its page on taxable profit, for accrual accounting and the determination of profit by comparing successive balance sheets.

From the Administration des contributions directes: article 40 of the amended law of 4 December 1967 on income tax, in the consolidated version it publishes, for keeping the commercial balance sheet values in the tax balance sheet, for the decisive character of the position at the closing date, for the ability to take account of facts arising after the closing date and before the balance sheet is drawn up, and for the conditions of rectification and modification of a balance sheet.

From the indirect taxation portal: the amended law of 12 February 1979 on value added tax, for the right to deduct arising when the tax becomes chargeable, for holding a compliant invoice as a condition of its exercise, and for the tax on an instalment paid before the supply becoming chargeable on collection, up to the amount collected. From the Chamber of Commerce: the draft grand-ducal regulation on the standard chart of accounts, for classifying loan issue costs under account 204 among formation and similar expenses.

Four points could not be verified against an official source at this date. The primary texts first: the domains guichet.public.lu, legilux.public.lu, impotsdirects.public.lu, pfi.public.lu, cnc.lu and cc.lu are blocked by the network proxy of our editorial environment, and those pages were read through indexed extracts using a search restricted to official domains; the statements above reproduce those extracts without extrapolation.

Next the exact ranking of the items in the layout in force: rank E on the assets side and rank D on the liabilities side come from the mapping table of the Commission des normes comptables and from the text of the law, the grand-ducal regulation of 18 December 2015 not having been read itself.

Next the annex to the standard chart of accounts applicable since financial years beginning in 2020, determined by the grand-ducal regulation of 12 September 2019, which is not readable from our environment: the numbering cited is that of the 2009 chart and of the draft published by the Chamber of Commerce. Lastly the write-off period specific to loan issue costs, which none of the sources consulted sets; only the five-year maximum for formation expenses was verified. These points can be verified on legilux.public.lu, on cnc.lu and on pfi.public.lu.

This article states the law as it stands at the date of publication and is not personalised legal or tax advice: the characterisation of a carry-forward, the period retained, the account used and the tax treatment depend on the documents available, on the accounting framework applied and on the company's own situation. Texts, regulations and practice change, and any decision binding your structure should be verified on the date you rely on it. Report an error to contact@financialservices.lu: the correction is dated in the article.