URSSAF Contributions: Base, Exemptions and Ceiling

Quick answer. The social contribution base is the employee's gross remuneration (salary, bonuses, benefits in kind), defined by Article L242-1 of the French Social Security Code. Some contributions are capped at the social security ceiling, set at EUR 48,060 in 2026; others are uncapped. The ceiling is reconciled progressively at each payroll run.

A business owner receiving their first French payslip often asks the same question: why does the employer cost far exceed the gross salary stated in the contract? The answer lies in the mechanics of the social contribution base and its ceiling.

A base error is not visible right away. It surfaces during a URSSAF audit, sometimes three years later, as a reassessment with penalties. Mastering this mechanism means securing both your cash flow and your company's compliance.

We support employers daily on managing your company's payroll, and the contribution base remains one area where automated tools calculate correctly, but human oversight makes the difference. This article describes the real logic, beyond the headline rates.

The contribution base is the figure to which contribution rates are applied. It is set out in Article L242-1 of the French Social Security Code: all sums paid to the employee in return for or in connection with work are subject to contributions.

In practice, the base includes the base salary, but also the following items.

• Gross salary and overtime.
• Bonuses (seniority, performance, thirteenth month).
• Gratuities and bonuses.
• Benefits in kind (company car, housing, meals, phone).
• Paid leave allowances.

Some items fall outside the base or benefit from a favourable regime: documented reimbursement of professional expenses, severance within certain limits, employee savings schemes, meal vouchers within the exempt portion. Each follows precise conditions, and this is often where discrepancies appear in the files we take over.

The logic differs for a self-employed worker, whose base rests on professional income, as we detail in our review of self-employed social contributions. This page covers the base for employees.

Not all contributions are calculated on the full remuneration. This is the whole point of the social security ceiling (PASS), revalued each year.

In 2026, the PASS stands at EUR 48,060 per year, i.e. a monthly ceiling (PMSS) of EUR 4,005. This ceiling is used to split remuneration into brackets.

• Bracket 1 (T1) is the portion of remuneration between 0 and 1 PASS, i.e. up to EUR 4,005 per month in 2026.
• Bracket 2 (T2) is the portion between 1 and 8 PASS, i.e. from EUR 48,060 to EUR 384,480 per year.

Some contributions are capped: they apply only to the part of salary within the ceiling. Others are uncapped: they apply to the entire remuneration, with no limit.

The Agirc-Arrco supplementary pension illustrates the bracket logic well: it is calculated at a contractual rate of 6.20% on T1 and 17% on T2, before the call rate is applied. An executive whose remuneration exceeds the PASS therefore bears two distinct rates depending on the salary fraction concerned.

Yes, and this is a frequent source of error. CSG-CRDS is not calculated on exactly the same base as standard contributions.

CSG is due at 9.2% on employment income, of which 6.8% is deductible from taxable income and 2.4% is non-deductible. CRDS adds 0.5%, bringing the total CSG-CRDS to 9.7%. These contributions are governed by Articles L136-1 to L136-8 of the French Social Security Code.

Two specific points should be remembered.

1. CSG-CRDS is calculated on 98.25% of gross income, that is, after a 1.75% allowance for professional expenses. This allowance applies only up to 4 PASS, i.e. EUR 192,240 in 2026. Beyond that, CSG-CRDS applies to 100% of remuneration.
2. Some employer contributions (death/disability cover, health insurance, supplementary pension) are added back into the CSG-CRDS base, without the benefit of the 1.75% allowance. A portion of net but invisible pay can therefore generate CSG.

This mechanism is precisely why an employee covered by a company health plan sees their CSG slightly higher than a naive calculation would suggest. The CSG-CRDS base is broader than the income tax base.

The monthly ceiling of EUR 4,005 is not fixed month by month. It is subject to a progressive ceiling reconciliation, designed by the rules to prevent an employee with variable pay from paying too much or too little in capped contributions.

The principle: at each payroll run, the employer compares the sum of bases since the start of the year with the sum of applicable ceilings over the same period. Any difference gives rise to an additional payment or a refund.

Here are the steps of the cumulative monthly calculation.

1. Add up the gross remuneration paid since 1 January (or the hire date).
2. Add up the monthly ceilings applicable over the same period.
3. Compare the theoretical cumulative ceiling with the capped base already declared.
4. Adjust the month's capped base to make up the gap.

For an employee who is not on a monthly basis, or who joins or leaves during the month, the ceiling is prorated: the monthly ceiling value multiplied by the number of days in the pay period divided by the number of calendar days in the month. Unpaid absence also reduces the applicable ceiling.

Several situations fall outside the standard pattern and concentrate the errors.

• Part-time employee: the ceiling can be reduced in proportion to working time, on option, which changes the capped base.
• Multiple employers: each employer applies its own ceiling, which can lead to an overpayment corrected by the employee.
• Apprentices and assisted contracts: flat-rate bases or specific exemptions apply and must be set up correctly.
• Director treated as an employee (SASU president, minority SARL manager): the same base and bracket mechanics apply to their remuneration, which weighs heavily on the overall cost.

For a director, the trade-off between salary and dividends depends directly on this base. This is a point we address systematically in outsourced CFO engagements, because the cash-flow impact quickly runs into thousands of euros.

Certain errors recur in the payroll files we audit. Here are the most costly ones.

We also see errors upstream of payroll itself. A poorly completed pre-hire declaration or an outdated 2026 payslip weakens the whole reporting chain. Consistency between the base, withholding tax in payroll and the DSN must be checked before each filing.

The underestimated risk, in our experience, is not the rate calculation: software applies rates correctly. The real issue is the scope of the base. An undeclared benefit in kind, a misattributed bonus, an employer contribution left out of the CSG base: these gaps are individually small, but they accumulate over three years and across the whole workforce.

Recently, the owner of a services SME approached us after running payroll in-house for two years. The payslips looked correct, but the company cars of three sales staff had never been included in the base. The reconciliation, spread over the non-time-barred period, amounted to several thousand euros in recalled contributions. The cost was not the reassessment itself, but the time spent rebuilding the bases month by month.

Here is our reading. The base is a matter of documentary rigour before it is a matter of calculation. Good initial setup in a Silae payroll software solves 90% of cases, provided variable items are entered with discipline each month. It is that discipline, more than knowledge of the rates, that distinguishes secure payroll from risky payroll.

What the authorities look at first: the consistency between the benefits actually granted (bank statements, vehicle lease contracts, leases) and what appears in the base. A URSSAF inspector cross-checks these sources. We therefore recommend keeping a benefits-in-kind tracking sheet, updated at each change, rather than reconstructing under time pressure.

Hayot Expertise tip. Before each annual close, have your contribution base reviewed by an outside eye. A focused review of benefits in kind, the CSG-CRDS base and the ceiling reconciliation is often enough to avoid a reassessment. As a chartered accountant and statutory auditor registered with the Ordre, we carry out this check as part of the payroll engagement, alongside payslip production.