Status & contributions
Self-employed as a secondary occupation
By the Finances Indépendants editorial teamUpdated on 3 min readAlso known as: Side activity, Secondary self-employment, Statut social complémentaire
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Contents
What is self-employed status as a secondary occupation?
It is the NISSE (National Institute for the Social Security of the Self-employed, INASTI/RSVZ) status of someone who runs a self-employed activity on top of a main occupation, most often a salaried job of at least half-time. The main occupation already opens up social security rights; the self-employed activity is added to it.
The logic of the status follows from this: since social cover is already secured elsewhere, contributions on the secondary activity do not fund new entitlements. They are still due once income exceeds the threshold, but they improve neither the pension nor the benefits.
The exemption threshold
No contribution is due as long as annual net income stays below €1,922.16. Above that, the contribution is calculated at the ordinary rates on the whole of the income, not just on the part above the threshold (voluntary contributions are possible below the threshold to build up entitlements).
It is a threshold of annual net income, calculated after deducting business expenses, not a turnover figure. An activity that invoices more but makes little profit can stay below the threshold.
What the status costs above the threshold
The rates are the same as for a main occupation: 20.5% up to €75,024.54, then 14.16% up to €110,562.42. They apply to the whole of the income once the threshold is reached: the threshold is not an allowance deducted from income, unlike the scheme for self-employed students.
The difference from a main occupation is therefore not the rate but the level of the minimum contribution: €98.51 per quarter for someone with a secondary occupation who exceeds the threshold, against €890.42 for someone self-employed as a main occupation, due even with no income. Below the threshold, someone with a secondary occupation pays nothing.
When the status switches to main occupation
The status follows the main occupation, not the level of self-employed income. If you lose your salaried job or drop below half-time, the self-employed activity becomes your main occupation and the status changes, along with the minimum contribution that goes with it.
The switch can be retroactive. The NISSE reclassifies you for the period concerned and claims the difference, surcharges included. Report any change in your situation to your fund without waiting for regularisation: it is that delay that turns an adjustment into a nasty surprise.
Should you pay voluntary contributions below the threshold?
It is possible, and rarely worthwhile. Since the main occupation already opens up pension and health care rights, paying voluntary contributions on a small secondary activity does little to improve your situation.
There is one exception: access to the PLCI/VAPZ (free supplementary pension for the self-employed) requires you to be up to date with contributions. Someone with a secondary occupation who pays contributions can therefore take out a PLCI/VAPZ and benefit from its deduction, which changes the calculation if the secondary income is substantial.
Not to be confused with
The terms close to Self-employed as a secondary occupation and what sets them apart.
- Self-employed as a secondary occupation and self-employed as a main occupation
- A main occupation carries a minimum quarterly contribution of €890.42 even with no income. Someone with a secondary occupation pays nothing below €1,922.16 of annual net income.
- Self-employed as a secondary occupation and an undeclared side activity
- Secondary-occupation status requires joining a fund, even if no contribution is due. Not joining is an offence, not an exemption.
Further reading
- Adjustment (regularisation) of social security contributions
- Assisting spouse
- INASTI, Institut National d'Assurances Sociales pour Travailleurs Indépendants (National Institute for the Social Security of the Self-employed, NISSE)
- ONSS, Office National de Sécurité Sociale (National Social Security Office, NSSO)
- All glossary terms
Self-employed as a secondary occupation: frequently asked questions
Someone who already has a main occupation, usually a salaried job of at least half-time, and runs a self-employed activity on top. The status follows the main occupation, not the level of self-employed income.
No contribution is due as long as annual net income stays below €1,922.16. Above that, the contribution is calculated at the ordinary rates on the whole of the income, not just on the part above the threshold (voluntary contributions are possible below the threshold to build up entitlements). This is annual net income, after business expenses, not turnover.
No, not additional entitlements: social cover is already provided by the main occupation. Contributions are nevertheless due once the threshold is reached, at the same rates as for a main occupation and on the whole of the income.
The self-employed activity becomes your main occupation, with the minimum quarterly contribution of €890.42. The reclassification can be retroactive and lead to a back-payment: let your fund know as soon as things change.
Yes, provided you are actually up to date with social security contributions. Someone exempt because they are below the threshold does not meet this condition. Paying voluntary contributions may then make sense if the secondary income is substantial.
Yes. Joining is compulsory from the start of the self-employed activity, regardless of income. The exemption applies to the contribution, not to the obligation to join.
Official source
- NISSE. View (new tab)(Official source, accessed on 2026-10-11)