🇧🇪 EU / International

Tax-on-web (Belgium)

Belgian income tax return via MyMinfin — deadline mid-July

Medium ~30 min TaxBelgiumIncomeAnnual

/ 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

1 Gather Documents

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

2 Log in to MyMinfin

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

3 Review Pre-Filled Data

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

4 Enter Additional Deductions

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

5 Submit 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).