Personal taxation · Luxembourg
Occasional side income in Luxembourg: how is it taxed?
A side activity does not benefit from a general exemption simply because the amount is small. You need to classify the transactions, how regular and how organised they are, then check the tax category and the obligations that follow.
Financial Services Luxembourg · Licensed accountant · Head of the firm: Mickaël LOC. Editorial update: .
Start from the facts
- Nature of the service or of the item sold.
- One-off or recurring nature and any marketing efforts.
- Resources used, clients, contracts and economic intention.
- Expenses incurred and supporting documents.
- Any other obligations: business permit, VAT and social security registration.
A threshold does not replace classification
The law sets rules for certain categories of income, but a single figure is not enough to classify all side income. Do not turn a filing obligation threshold into a universal exemption.
Using a platform or a personal account does not on its own determine the treatment. Information reported by an intermediary must be reconciled with your actual transactions.
Fictitious example
Selling a personal item once and regularly buying goods to resell them do not describe the same activity. Two people receiving the same amount may be in different tax situations.
A one-off professional assignment also requires you to distinguish receipts, expenses and net income, without deducting private costs that have no proven link.
Preparing the decision
Draw up a table of transactions by date, nature and amount, with the contracts and expenses. Your personal tax return may need to include the result according to its category; it does not replace any business formalities.
Before invoicing more, have the framework of the activity checked. The tax review and the necessary permits are complementary questions.
The firm’s other tax engagements
Depending on your situation, the firm also handles tax, VAT and payroll, the regularisation of late tax filings and assistance during a tax audit. Fees are listed in the firm’s fee grid.
Official sources and scope
- ACD: income tax law (LIR) texts by year
- ACD: assessment based on a tax return
- ACD: miscellaneous income and disposals
The rules apply to the year and profile concerned. Examples flagged as fictitious explain a method; they are not an individual validation. The documents and options of your file are covered by a separate engagement.