Enter a Belgian salary and this calculator applies the federal income tax bands for income year 2026, the tax-free sum and employee social security. It also adds a municipal surcharge of 7% of the federal tax, close to the national average. What you get is the federal tax, the estimated local charge, the contributions, and a monthly take-home figure.
Income tax and employee contributions, 2026 rates.
| Breakdown | Amount |
|---|
Estimates for a single employee with standard allowances, calculated in your browser. Rates checked October 2026. Not tax advice.
The first €11,550 of income is covered by the tax-free sum. A reform law in July 2026 raised it from the indexed €11,180, backdated to 1 January 2026. Above the tax-free sum, federal tax runs at 25% up to €16,720, 40% up to €29,510, 45% up to €51,070 and 50% above that. On top of the federal bill, your municipality adds its own surcharge, which ranges from 0% to about 9% of the tax depending on where you live. This calculator uses 7%, so treat the local part as an estimate. In law the tax-free sum works as a reduction calculated at the lowest rate; here it is treated as an allowance taken off your income, which slightly overstates its value if you are a high earner.
Before the tax bands apply, employees can deduct flat-rate professional expenses of 30% of pay, capped at €6,070 for 2026. Employee social security (ONSS/RSZ) is 13.07% of gross pay with no ceiling. One simplification runs the other way: in real Belgian payroll the social security contributions are deducted before income tax is calculated, which lowers the tax bill. This calculator taxes the higher gross-based figure, so its income tax numbers sit above what a payslip would show. It also leaves out the special social security contribution (up to roughly €731 a year), the work bonus for low wages and the extra tax-free amounts for dependent children.
| Taxable income band | Rate |
|---|---|
| Up to €16,720 | 25% |
| €16,720 – €29,510 | 40% |
| €29,510 – €51,070 | 45% |
| Above €51,070 | 50% |
Bands apply to taxable income — what is left after the standard deduction and the tax-free sum (basic, income year 2026) of €11,550. A surtax of 7% is added to the tax.
| Gross salary | Income tax | Social | Take-home | Effective rate |
|---|---|---|---|---|
| €22,500 | €1,305 | €2,941 | €18,254 | 18.9% |
| €45,000 | €9,035 | €5,882 | €30,083 | 33.1% |
| €90,000 | €31,729 | €11,763 | €46,508 | 48.3% |
| €179,500 | €79,611 | €23,461 | €76,428 | 57.4% |
On €45,000 a year, take-home pay in Belgium is €30,083 — about €2,507 a month — after €9,035 in income tax and €5,882 in social contributions. Salary levels are the local equivalents of US$25,000 / $50,000 / $100,000 / $200,000 at the ECB reference rate of 28 October 2026, rounded.
| Contribution | Rate | Applies from | Applies up to |
|---|---|---|---|
| Employee social security (ONSS/RSZ) | 13.07% | First €0 | No cap |
Employee side only. Employer contributions, where a country charges them, do not come out of your pay and are not in these results.
The same salary under both tax systems, worked through at several income levels.
Compare them →The same salary under both tax systems, worked through at several income levels.
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