Belgium is one of Western Europe’s most complex payroll environments. The country’s layered system of federal law, sector-level collective labour agreements (CLAs), and joint committees means that what applies to one employer doesn’t always apply to another. If you’re hiring employees in Belgium for the first time, here’s what you need to know before you run your first payroll.
Payroll frequency and pay date
Belgian employees are paid monthly. The standard pay date is the 27th of each month. If the 27th falls on a weekend or a public holiday, you pay on the last banking day before it. Employers don’t have discretion to shift this without a formal agreement, so build it into your payroll calendar from day one.
All salaries are paid in euros (EUR).
Minimum wage in 2026
Belgium sets a national minimum wage called the RMMMG (revenu minimum mensuel moyen garanti), calculated for a standard 38-hour working week.
For 2026, the rates are:
- 1 January to 31 March 2026: €2,154.11 gross per month
- From 1 April 2026: €2,189.81 gross per month
These are floors, not targets. Many sectors set higher minimums through CLAs, and those sector minimums will override the national figure if they’re higher. Before you finalise any offer, check the applicable joint committee (commission paritaire / paritair comité) for your sector to make sure you’re meeting the right minimum.
How belgian payroll deductions work
Belgian payroll involves two layers of deductions taken from gross salary before an employee sees a net figure. Here’s how each one works.
Employee social security
The employee contributes 13.07% of gross salary to the national social security system (ONSS/RSZ). This is deducted from gross pay before income tax is calculated. It covers pensions, health insurance, unemployment insurance, and related benefits.
There’s no ceiling on this contribution, so it applies to the full gross salary regardless of earnings level.
Income tax withholding
Once social security has been deducted, income tax is calculated on the remaining amount using Belgium’s progressive brackets:
- 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
On top of federal income tax, a municipal tax (centimes additionnels / opcentiemen) applies. The rate varies by municipality but averages around 7% of the income tax amount.
You withhold income tax each month through a system called précompte professionnel (French) or bedrijfsvoorheffing (Dutch). This is a payroll withholding obligation, not an optional process. The calculation uses official withholding tables published by the Belgian tax authority (SPF Finances / FOD Financiën) and takes personal factors like family situation and dependants into account.
Employer contributions and on-costs
Beyond gross salary, you’ll need to budget for employer-side social security contributions. These run at approximately 25 to 30% of gross salary, depending on your sector and the type of employee. The contributions cover the employer’s share of pensions, health insurance, family allowances, and other social programmes.
That range is significant. Before you model the true cost of a Belgian hire, get the precise rate for your joint committee. Blended estimates will put you in the right ballpark, but only the sector-specific figure gives you an accurate number.
Standard working hours in Belgium are 38 hours per week, or 8 hours per day. Overtime carries additional cost obligations, so you’ll want to track hours carefully and understand the overtime rules for your sector.
Double vacation pay and the year-end bonus
Two supplementary pay items catch many foreign employers off guard.
Double vacation pay (dubbel vakantiegeld) is a significant additional payment tied to the annual leave system. White-collar employees receive 92% of one month’s gross salary, paid by the employer in May or June. The entitlement is based on the previous calendar year’s work, so it’s pro-rated if the employee worked less than a full year. For blue-collar workers, the mechanism is different: the payment is made through sectoral holiday funds (rijksdienst voor jaarlijkse vakantie / office national des vacances annuelles) rather than directly by the employer. You’ll need to understand which category your employees fall into.
The year-end bonus, often called the 13th month, isn’t a statutory requirement at the national level. However, it’s near-universal in practice because it’s mandated through CLAs at the sector level. In most joint committees, you’re effectively required to pay it. Don’t assume it’s optional until you’ve confirmed the rules for your specific sector.
Dimona registration
Before an employee starts work in Belgium, you must register them through the Dimona system (Déclaration Immédiate / Onmiddellijke Aangifte). Dimona is an electronic notification system administered by ONSS/RSZ. You also need to file a closing notification when an employee leaves.
Dimona registration isn’t a formality. Failing to register is treated as a serious compliance breach and can result in significant penalties. The system exists precisely so that the authorities know who is employed, by whom, and from when. Get this right before day one, not after.
Running belgian payroll as a foreign employer
If you don’t have a legal entity in Belgium, you can’t run payroll there directly. You’ll need a structure that can employ workers on Belgian soil and handle contributions to ONSS/RSZ, Dimona registrations, and monthly withholding obligations.
The most straightforward route for most foreign companies is to use an Employer of Record (EOR). An EOR acts as the legal employer in Belgium, handling payroll, social security filings, Dimona notifications, and CLA compliance on your behalf. You retain day-to-day management of the employee, while the EOR takes on the legal and administrative burden.
If you want to understand exactly how the model works before you commit, this guide to what an EOR is covers the mechanics in detail. And if you’re comparing providers, this breakdown of the best EOR services is worth reading.
Book a demo to see how RemotePass handles Belgian payroll and compliance end to end.
Frequently asked questions
Is a 13th month payment mandatory in belgium?
It’s not mandated by national statute, but it is required for most employers through sector-level CLAs. The applicable rules depend on which joint committee covers your industry. In practice, the vast majority of Belgian employers pay a year-end bonus, and you should assume it’s required until you’ve confirmed otherwise for your sector.
What is dimona and when do you need to file it?
Dimona is the electronic system employers use to notify the Belgian social security authority (ONSS/RSZ) of every employment relationship. You must file a start notification before the employee begins work and a closing notification when they leave. Missing a Dimona filing is a compliance violation with real penalties.
Can you hire on a fixed-term contract in belgium?
Yes, but Belgian law limits fixed-term contracts strictly. You can offer a maximum of four consecutive fixed-term contracts, each lasting at least three months, with the total duration not exceeding two years. Once you exceed these limits, the contract automatically converts to an indefinite-term contract.
Does belgium have a statutory probation period?
No. Belgium removed the general right to include trial clauses in employment contracts. Probationary periods are only possible through specific provisions in certain sector-level CLAs. Don’t assume you can include a probation clause by default. Check the rules for your joint committee before drafting any contract.
