NISSE contributions 2026: rates, funds, statuses

Registering with a social insurance fund is compulsory and must be done before the activity actually starts. It must be completed no later than the 1st day of activity; late regularisation exposes you to a fine of €500 to €2,000 depending on how long the delay lasts.

3 steps to register:

1. Choose a social insurance fund: Group S, Acerta, Liantis, Xerius, Partena (see the comparison below).
2. Fill in the registration form online (national number, intended status, business sector, start date).
3. Receive your NISSE number and the quarterly payment schedule.

Self-employed as a main occupation

This is the default status for self-employed people whose activity is their main source of income. The minimum income for contributions is €17,374.08 in 2026; below that, you pay the minimum flat-rate contribution (€890.42 a quarter, excluding management fees). For the first 3 years, the NISSE applies provisional contributions based on this floor, regularised 2 years later on actual income.

Self-employed as a secondary occupation

A status open to self-employed people working alongside a main activity: employee working at least half-time, civil servant, teacher or pensioner. If your annual net self-employed income is below €1,922.16, you are fully exempt (but no additional pension rights are built up). Once this threshold is reached, the same rates as for a main occupation apply, on the whole income.

Assisting spouse

A status for a married spouse or legal cohabitant who actually helps with their partner's self-employed activity. The maxi status has been compulsory since 1 July 2005 for spouses born after 1955: minimum income of €7,632.44, i.e. a minimum contribution of €391.16 a quarter excluding management fees. It gives entitlement to a full pension, healthcare, incapacity cover and the bridging right. The mini status is reserved for spouses born before 1956 (incapacity, invalidity and maternity only).

Pensioner still working

Pensioners (retirement pension, early or at the statutory age), or self-employed people who have reached the statutory age without drawing a pension and have asked to "opt out": no contribution is due up to €3,844.32 of annual net income (2026). Above that, a pensioner pays 14.7% instead of 20.5%, on the whole income, with a minimum of €141.28 a quarter. Someone who opts out without any pension pays 20.5% on the whole income up to €17,374.08 (minimum €197.02 a quarter), then the contributions of a self-employed person as a main occupation. With only a survivor's pension, opting out gives entitlement to the 14.7% rate.

Combining pension and income is unlimited after a 45-year career or from 1 January of the year in which you reach the statutory age. Before that, permitted income is capped: €8,346.00 net a year before the statutory age, €24,105.00 once the statutory age is reached, without dependants. In every case, a retirement pensioner who is still working pays a reduced rate of 14.7% and their income no longer builds up additional rights.

The 20.5% in main contributions finance five social rights through the NISSE:

• Statutory pension, see NISSE statutory pension (~13 contribution points, €1,845 a month guaranteed minimum after a full career for a single person).
• Healthcare, NIHDI (INAMI/RIZIV) cover through the health insurance fund (~5 contribution points).
• Incapacity for work, NIHDI benefit from the 8th day, primary incapacity for 1 year, then invalidity.
• Family allowances, managed by the regions since 2019 (FAMIWAL in Wallonia, FAMIRIS in Brussels).
• Bridging right, a benefit for up to 12 months in the event of bankruptcy or forced cessation + continued healthcare cover for 4 quarters.

Self-employed people in Belgium are sometimes critical of the "contributions vs pension" return, which is true in absolute terms (the statutory pension is modest). But the other four rights have real economic value (equivalent to ~€3,000 a year of private insurance for incapacity + healthcare). A rational calculation has to take all of them into account.