🇧🇪EU / International

Tax-on-web (Belgium)

Belgian income tax return via MyMinfin — deadline mid-July

Medium~30 minTaxBelgiumIncomeAnnual

/ What is this form?

All Belgian residents must file an annual income tax return. File online via Tax-on-web using your eID or itsme. The system pre-fills employment income and some deductions. Belgium has one of the highest tax rates in Europe (marginal rate up to 50%).

/ Who needs this form?

All Belgian tax residents
Non-residents with Belgian income
Even if you had no income (mandatory filing)

/ What you need before you start

eID or itsme for authentication

Fiche 281.10 (from employer)

Receipts for deductions (mortgage, childcare, donations, pensions)

Foreign income documentation

/ Step-by-step guide

1Gather Documents

Collect your Fiche 281.10 from your employer, mortgage interest certificates, childcare receipts, and donation receipts.

2Log in to MyMinfin

Go to myminfin.be and log in with your eID or itsme app.

3Review Pre-Filled Data

Tax-on-web pre-fills employment income and some deductions. Review all pre-filled values carefully.

4Enter Additional Deductions

Add mortgage interest (woonbonus), childcare costs, charitable donations, and any other eligible deductions.

5Submit Before Deadline

Submit online by mid-July. Paper filing deadline is earlier (end of June).

/ Key fields explained

Field	What to enter	Common mistake
Code 1250 / 2250	Mortgage interest deduction	Different codes apply for old vs new mortgage tax relief systems — check which applies to your mortgage

/ Common mistakes to avoid

Not filing on time (automatic penalties)

Not claiming the woonbonus or mortgage deductions

Not declaring foreign bank accounts (mandatory since 2011)

/ Frequently asked questions

When is the deadline?

Usually mid-July for online filing. Paper filing deadline is earlier (typically end of June).