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Income tax in Belgium 2026
Belgium's four brackets climb fast: 25% from the first taxed euro, 40% above €16,720, 45% above €29,510 and 50% above €51,070 — a threshold barely above the average full-time salary.
Municipalities add a surcharge of 0%–10% of the tax bill (roughly 7% on average), and a tax-free base of €11,180 (more per child) softens the entry.
Uncapped social security of 13.07% sits on top of it all, pushing real marginal rates on salary above 59%.
At a glance
- top rate
- 50% above €51,070 (+ municipal surcharge)
- entry band
- 25% after the €11,180 tax-free base
- tax year basis
- Calendar year, assessed the following year
- filing deadline
- Typically 30 June paper / mid-July online in the assessment year — exact dates are set annually
- residency basis
- Residents taxed on worldwide income
- regime flag
- Expat regime: 35% of pay tax-free as employer costs
Rates
Income tax brackets (2026)
| Band (EUR) | Rate on this band | Note |
|---|---|---|
| 0 – 16,720 | 25% | The €11,180 tax-free base is credited at these rates first |
| 16,720 – 29,510 | 40% | |
| 29,510 – 51,070 | 45% | |
| Over 51,070 | 50% | Municipal surcharge (avg ≈ 7% of the tax) on top |
Marginal rates apply within each band.
Thresholds & allowances
- Tax-free base€11,180 per person (2026)
Increased per dependent child: +€2,030 (1 child) up to +€18,970 (4), +€7,240 each further child; single parents +€2,030
- Lump-sum work expenses30% of pay, capped at €6,070
Or actual substantiated expenses; directors get only 3% (max €3,200)
- Marital quotientUp to 30% of earnings (max €13,800) attributed to a non-earning spouse
Taxed in the lower-earning spouse's hands; being phased down from 2029
- Pension savings credit30% on deposits to €1,050 (or 25% to €1,350)
Long-term savings taxed later at 8%–10% at age 60 under the standard path
- Copyright income15% rate up to €77,220 with 25%–50% cost deductions
For qualifying creative royalties; excess is ordinary income
Surcharges
- Municipal surcharge0% – 10% of the tax (avg ≈ 7%)over The income tax bill, set by your commune; non-residents pay a flat 6% federal substitute
Residency
Residency trigger
You are Belgian-resident if your main home or centre of economic interests is in Belgium; registration in the population register creates a rebuttable presumption, and a family home in Belgium settles it for married couples. Couples file jointly but are taxed on separately computed incomes.
Non-resident treatment
Non-residents pay Belgian tax on Belgian income. Earning 75%+ of professional income in Belgium (and residing in the European Economic Area (EEA)) unlocks the full set of allowances and regional reliefs.
Notes
- Belgium's uniquely low 50%-bracket threshold means ordinary professionals face top-bracket marginal rates — the tax-optimised company car and benefit culture exists for a reason.
- Benefits in kind are taxed by formula: company cars via catalogue value and CO2 emissions (minimum €1,650 a year), free housing at an indexed cadastral figure.
- Stock options are taxed at grant on a lump-sum basis (typically 18% of share value, halved under conditions) — with no further tax on exercise gains.
- The self-employed make quarterly prepayments to avoid surcharges; employees settle through payroll withholding.
- Foreign earned income taxed abroad gets a 50% Belgian tax reduction when no treaty applies; treaty income is usually exempt with progression.
- The 'Cayman tax' looks through low-taxed foreign trusts and entities, taxing founders directly on the structure's income at up to 30%.
FAQ
What is the top income tax rate in Belgium?
50%, starting at just €51,070 — plus a municipal surcharge (about 7% of the tax on average) and 13.07% uncapped social security, for real marginal rates around 59%.
How does the Belgian expat regime work?
Employees recruited from abroad earning €70,000+ (researchers: no floor, master's degree required) can receive up to 35% of salary as a tax-free employer-cost reimbursement for 5 years, extendable to 8. You must not have lived within 150 km of Belgium in the previous 60 months.
When is the Belgian tax return due?
Generally 30 June of the assessment year on paper, or mid-July online (exact dates are fixed each assessment year) — for income earned the previous calendar year. The bill arrives by assessment afterwards, payable within 2 months.
Figures: tax year 2026, compiled from public sources. Not tax advice.