Belgium gross to net salary calculator 2026
Estimate your Belgian net salary from the gross: NSSO social security, withholding tax, work bonus, dependent children. 2026 scales, free and instant.
Parameters
Enter your gross salary to see your estimated net.
How much net will I take home?
Enter your gross monthly salary above for an instant net estimate — NSSO contribution (13.07%), withholding tax on the 2025-income scale, and the work bonus for low and middle salaries are all applied automatically. The result is an estimate: your exact net can differ slightly depending on your municipality's tax surcharge and your employer's specific benefits.
From gross to net: how does it work?
In Belgium, two main deductions separate your gross salary from what you actually receive: the NSSO social security contribution and the withholding tax (income tax). This tool estimates your monthly net using the scales for tax year 2026 (2025 income).
1. The NSSO contribution (13.07%)
First, 13.07% of gross is deducted for social security. The remaining amount is your taxable income.
2. The withholding tax
The taxable income is annualised, flat-rate professional expenses are deducted (30%, capped at €5,930), then the official withholding scale is applied (2025 income):
- 26.75% up to €16,310
- 42.80% from €16,310 to €28,790
- 48.15% from €28,790 to €49,820
- 53.50% above €49,820
A base reduction (€2,915.75 for a single person, doubled for a single-income couple) and reductions per dependent child then lower this amount. The result divided by 12 gives the withholding tax on your payslip.
What changes your actual net
The estimate above reflects the ordinary monthly net. Several elements specific to your situation change the amount actually paid:
- The 13th month and double holiday pay: taxed at a separate (higher) rate, they inflate annual gross without raising the net proportionally.
- Meal vouchers, eco-vouchers and benefits: outside taxable gross, but real purchasing power.
- Municipal surcharges: each municipality adds a percentage to the tax, so the final net varies from one municipality to another.
The exact breakdown appears on your payslip and is settled with your annual tax return.
The work bonus, included in the calculation
For low and middle salaries (up to ± €3,337 gross/month in 2026), the State reduces the personal NSSO contribution via the work bonus, complemented by a withholding tax reduction (fiscal bonus). The estimate above applies it automatically (white-collar scale in force since 1 April 2026): if your salary qualifies, the "Work bonus" line appears in the breakdown. For very low salaries, the NSSO contribution can be cancelled entirely.
Frequently asked questions
What percentage of gross salary is net in Belgium?
There is no fixed percentage: the gross-to-net conversion is progressive. The NSSO contribution takes 13.07% of gross, then income tax (withholding tax) rises in brackets with income. In practice, net is often 60 to 75% of gross for an employee, lower as the salary rises.
How do you go from gross to net salary in Belgium?
Three steps: first the NSSO contribution (13.07%) is deducted from gross, giving taxable income; then the withholding tax is computed according to progressive brackets and your situation; the net is what remains after these deductions.
What is the 13.07% NSSO contribution?
It is the worker’s personal social security contribution, deducted from gross salary. It funds pensions, unemployment, health insurance and family allowances.
Why does my actual net differ from the estimate?
Your actual net depends on elements not included here: 13th month and double holiday pay, meal vouchers, benefits, bonuses, group insurance, and the exact municipal surcharge rate of your municipality. This tool estimates the ordinary monthly net, work bonus included.
What is the calculation based on?
On the official key formula of the withholding tax from the Belgian FPS Finance (2025 income), the one used by payroll offices , the 13.07% NSSO rate, and the work bonus (NSSO white-collar scale in force since 1 April 2026, social and fiscal components).
What is the work bonus?
A reduction of personal NSSO contributions for low and middle salaries (up to ± €3,337 gross/month in 2026), complemented by a withholding tax reduction (the "fiscal work bonus": 33.14% of the low-wage component and 52.54% of the very-low-wage component). It is applied automatically by the employer, and included in this estimate. For very low salaries, it can cancel the NSSO contribution entirely.
Is the final income tax identical to the withholding tax?
Not exactly: the withholding tax is a monthly advance. The final amount is settled with your annual tax return, which can lead to a refund or an additional payment.
How do I calculate my net for part-time work?
There is no separate tax rule for part-time work: NSSO and withholding tax are computed exactly the same way, on your actual gross. The "Part-time" option is an input convenience: it multiplies your full-time gross by your occupation rate to get your actual gross, and applies the work bonus using the official NSSO method for part-timers.
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