Hiring in Belgium means taking on a meaningful payroll obligation before your employee sees a cent. Between employer social security contributions, mandatory withholding, a statutory vacation bonus, and pre-employment registration requirements, the cost of employment runs well above the headline salary figure. This guide walks you through each component so you can budget accurately and stay compliant from day one.
Employer social security contributions
Belgium’s social security system is administered by the ONSS (French) or RSZ (Dutch), and employers are required to pay contributions on top of every employee’s gross salary. These aren’t optional add-ons; they’re statutory obligations that apply from the first hire.
What’s included in the rate
Employer contributions total approximately 25–30% of gross salary, with the exact figure varying by sector and company size. The rate is made up of several components:
- Pension: 8.86%
- Health and disability insurance: 3.80%
- Unemployment: 1.46%
- Work accident insurance: 0.30–1.00% (sector-dependent)
- Family benefits and other contributions make up the remainder to reach the total rate
When you’re building a compensation model, use 27–28% as a working estimate and confirm the precise rate for your sector with a Belgian payroll specialist.
The high-earner cap
From 2026, there’s a meaningful change for companies hiring high earners. Employer contributions are reduced to 3% on the portion of gross salary that exceeds €85,000 per quarter. If you’re recruiting senior talent with packages in that range, this cap reduces your social security cost on the excess portion significantly.
Employee social security and income tax withholding
As the employer, you’re responsible for deducting both employee social security and income tax from gross pay each month before it reaches the employee’s account. Here’s how each works.
Employee social security
Employees contribute 13.07% of gross salary to social security. This is deducted from gross pay first, before income tax is calculated. That sequencing matters for payroll modeling: income tax applies to the reduced figure after the 13.07% deduction.
Income tax brackets and withholding
Belgium uses a progressive income tax system. The 2026 brackets (applying to income earned in 2025 and withheld during 2026) are:
- 25% on income up to €16,320
- 40% on income from €16,321 to €28,800
- 45% on income from €28,801 to €49,840
- 50% on income above €49,840
Every employee benefits from a basic tax-free allowance of €10,160. On top of federal income tax, a municipal surcharge of approximately 7% applies, with the exact rate depending on the employee’s municipality of residence.
You’ll withhold professional withholding tax (précompte professionnel / bedrijfsvoorheffing) monthly on behalf of your employees and remit it to the Belgian tax authority. The withholding tables account for personal circumstances, so you’ll need accurate employee data to apply them correctly.
Minimum wage obligations
Belgium’s national minimum wage is set by the RMMMG/GAMMI and applies to full-time employees working a standard 38-hour week. The rates for 2026 are:
- January 1 – March 31, 2026: €2,154.11 per month gross
- From April 1, 2026: €2,189.81 per month gross
These are national floors. A large number of sectors have joint committee agreements (commissions paritaires / paritaire comités) that set higher negotiated minimums. You’ll need to identify the relevant joint committee for your industry and confirm whether a sectoral minimum applies to your employees.
Double vacation pay
Belgium’s double vacation pay (dubbel vakantiegeld / double pécule de vacances) is one of the more distinctive obligations for employers unfamiliar with Belgian employment law. It’s a statutory vacation bonus equal to 92% of one month’s gross salary, paid in May or June each year.
The entitlement is based on work performed in the previous calendar year. Employees who worked a full year receive the full amount; those who worked part of the year receive a pro-rated figure. For white-collar employees, the employer pays this directly through payroll. Blue-collar workers are handled differently: their double vacation pay is administered through sectoral holiday funds (caisses de vacances / vakantiekassen), which employers contribute to separately.
If you’re onboarding employees mid-year, factor in the accrual from day one. The liability builds throughout the preceding year and falls due in a single payment, so it shouldn’t catch you off guard at budget time.
Dimona registration
Before an employee starts work, you’re required to register them electronically through the Dimona system (Déclaration Immédiate / Onmiddellijke Aangifte), which is operated by ONSS/RSZ. The registration must be submitted at the start of employment and again at the end. There’s no grace period: the declaration has to go in before work begins.
Dimona covers all employee categories, including fixed-term and permanent contracts. Non-compliance carries financial penalties, so make sure your payroll or HR process triggers the declaration before the first working day.
Hiring in belgium through an Employer of Record
For a foreign company without a Belgian legal entity, the most practical route to compliant hiring is through an Employer of Record (EOR). An EOR acts as the legal employer on record in Belgium, handling payroll, social security filings, Dimona registration, double vacation pay, and income tax withholding on your behalf, while your employee works for you day to day.
This matters because Belgian employment law requires a local legal presence to hire directly. Without one, you’re either setting up a Belgian entity (which takes time and ongoing cost to maintain) or relying on an EOR to provide that infrastructure immediately.
When evaluating EOR services, look for providers with direct payroll infrastructure in Belgium, not reseller arrangements that add a layer of complexity and cost.
Book a demo to see how RemotePass handles Belgian payroll and compliance end to end.
Frequently asked questions
How much does it cost to employ someone in belgium on top of their gross salary?
Employer social security contributions add approximately 25–30% on top of gross salary, depending on your sector and company size. On a €4,000 per month gross salary, that’s roughly €1,000–€1,200 in employer contributions alone. You’ll also need to account for the annual double vacation pay obligation, which equals 92% of one month’s gross salary.
When does the 2026 minimum wage increase take effect?
There are two rates in 2026. The rate of €2,154.11 per month applies from January 1 through March 31. From April 1, 2026, the rate increases to €2,189.81 per month. Both apply to the standard 38-hour workweek. Check whether your sector’s joint committee has set a higher minimum, as sectoral rates frequently exceed the national floor.
What is dimona and when do you need to file it?
Dimona is Belgium’s mandatory electronic employee registration system, run by ONSS/RSZ. You’re required to submit a declaration before each employee’s first day of work and again when employment ends. It applies to all contract types. Missing or late declarations result in financial penalties, so it should be a locked step in your onboarding process.
Can a foreign company hire in belgium without setting up a local entity?
Yes, through an Employer of Record. An EOR provides the Belgian legal entity required to employ staff locally, runs payroll, handles all statutory filings, and ensures compliance with Belgian labor law. It’s typically faster and less expensive than incorporating a Belgian subsidiary, particularly if you’re hiring a small number of employees to start.
