Belgium salary calculator 2026

Belgium has the steepest income tax curve of the countries around it. The lowest bracket already takes a quarter, the top rate of 50% starts at an income that in most of Europe would still count as middle class, and the employee's social security contribution of 13.07% comes off before any of that is calculated. The result is that a Belgian employee on an ordinary salary hands over a third of the gross, while a well-paid one is close to giving up half.

Four brackets, starting at 25%

Income tax is charged on annual income after social security, with a tax-free portion of 10,910 euros at the bottom. Above that, the first 16,320 euros are taxed at 25%, the slice up to 28,800 euros at 40%, the slice up to 49,840 euros at 45%, and everything higher at 50%. The thresholds are low: a full-time employee on the 4,076 euro average is already paying the 45% marginal rate on the top part of their income, and anyone comfortably above average is in the 50% band. This is the main reason Belgian net salaries are so compressed compared with gross ones.

Belgian municipalities also charge a surcharge on the income tax, set by each commune as a percentage of the national tax. The model does not add it. It also works from the final tax, whereas the amount withheld on a monthly Belgian payslip, the bedrijfsvoorheffing or precompte professionnel, is calculated from separate withholding tables and settled with the tax return the following year. The gross to net guide explains the general difference between withholding and final tax.

Social security at 13.07%

The employee's social security contribution is a single 13.07% of gross, paid to the national social security office (RSZ in Dutch, ONSS in French). It funds pensions, health care, unemployment benefit, family allowances and sick pay, and because it reduces the taxable base it also lowers the income tax. In practice low earners receive a work bonus that reduces this contribution, which the model does not apply; the minimum wage row below is therefore a little pessimistic.

Three salaries side by side

The pattern is the opposite of Germany's. There, contributions dominate and tax catches up late; here the income tax overtakes the 13.07% contribution well before the average wage and then runs away. Doubling the gross from 4,000 to 8,000 euros adds only about 1,800 euros of net, and at 8,000 euros the effective rate of 44% is the highest at that salary in this group of countries. What the table leaves out is that most Belgian white-collar employees also receive a thirteenth month and double holiday pay, both taxed at a special rate, which lift the annual net above twelve times the monthly figure.

The employer's contribution

Belgian employers pay one of the highest social security loadings in Europe. The model puts it at 24.92% of gross, so an employee on the 4,076 euro average costs 1,016 euros a month in employer contributions on top of the salary, a total of about 5,092 euros. Set against the 2,682 euros the employee takes home, close to half of the total cost of employment goes to the state. The employer cost guide shows how this compares elsewhere.

VAT: 21% with two reduced rates

The standard VAT rate is 21%. A reduced rate of 12% covers a short list including restaurant meals and social housing, and a 6% rate covers food, water, medicines, books and some renovation work. A 100 euro net price becomes 121 euros at the standard rate. The Belgian VAT calculator handles all three rates.

Working time and public holidays

Belgium's legal full-time week is 38 hours, shorter than the 40 that most neighbours use, which the model spreads as 7.6 hours a day. The statutory maximum is 48 hours including overtime. There are 10 public holidays in 2026, of which 8 fall on a weekday, leaving 253 working days. The distinctive dates are the National Day on 21 July, Armistice Day on 11 November and Assumption on 15 August, which falls on a Saturday this year, as All Saints' Day on 1 November falls on a Sunday. Belgian law requires a holiday that lands on a weekend to be replaced with a day off on another date, so most employees will actually get 10 days rather than the 8 the calendar shows; the working days calculator counts only the fixed dates and does not know the replacement days your employer has chosen.

Where the model is exact and where it is not

The brackets, the tax-free portion and the 13.07% contribution are the statutory 2026 figures, so the final annual tax for a single employee with no dependants should be close. The monthly net will differ from a real payslip for three reasons: the withholding tables do not track the final tax exactly, the municipal surcharge is not included, and the work bonus for lower salaries is not applied. The thirteenth month and holiday pay make the annual picture better than the monthly one. For a comparison across the border, the Dutch calculator shows a similar gross with a much lighter deduction.