How much social contributions do you pay in Belgium?
Enter your annual professional income and see what RSVZ/INASTI charges on it for tax year 2026 — as an annual figure and as a quarterly one.
Your numbers
A company director: gross director’s remuneration. A sole trader: net taxable business income.
Your answer
Social contributions per year
€18,209
- Per quarter
- €4,552per quarter
- Effective rate
- 19,2%
- Left before income tax
- €76,791
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On a professional income of €95,000, social contributions come to about €18,209 for tax year 2026 — roughly €4,552 per quarter, or 19,2% of income. That leaves €76,791 before income tax.
How this is calculated
Contributions are charged as a percentage of your professional income up to a ceiling, at a lower percentage on the portion above it, with a yearly floor and cap. This calculator applies the same flat effective-rate model as the Fiscalance optimizer. Two things it deliberately does not model: RSVZ/INASTI bills you provisional contributions based on your income from three years earlier and regularises later, and social-insurance-fund administration fees sit on top of the figures below.
Rates and thresholds, tax year 2026
| Rate on the first bracket | 20,5% |
|---|---|
| First bracket up to | €75,024.54 |
| Rate on the bracket above | 14,2% |
| No contributions on income above | €110,562.42 |
| Minimum per year | €3,561.69 |
| Maximum per year | €20,412.19 |
Rule set verified as of 2026-07-20
Questions people ask
- Are social contributions deductible?
- Yes. Contributions you actually paid during the year are deductible from your taxable professional income, so their real cost is lower than the headline amount — the tax you avoid comes back at your marginal rate.
- Why is my quarterly bill different from this?
- Your social-insurance fund bills provisional contributions based on your income from three years ago, then regularises once the real income is known. This calculator shows the definitive amount on the income you entered, which is what the regularisation settles towards.
- Does a director pay the same as a sole trader?
- The rates are identical; the base is not. A company director pays on gross director’s remuneration, a sole trader on net taxable business income after expenses.
This article is general information for a one-person company (BV/SRL), not tax advice. Rules and figures change — confirm your situation with your accountant before acting.
Fiscalance Editorial · Updated 5 August 2026