The activity bonus can supplement the remuneration of a SASU president. In 2025, the formula, thresholds, and pre-filling of declarations have evolved. Here is an operational, secure, and up-to-date method to legally optimize it.
The activity bonus remains available to SASU leaders as soon as there is professional income.
2025 formula: flat rate €633.21 + 59.85% of professional income + bonus – household resources.
Individual bonus from an average net €700.92, maximum around €1,425.60.
Pre-filled Caf declarations since March 2025; base from M-2 to M-4.
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SASU Leader and Eligibility: What the Law Says
A paid SASU president has the status of assimilated employee under the general scheme. For the Caf, they are treated as an employee for resource declarations, which allows access to the activity bonus if other conditions are met: being of legal age, residing in France stably, performing a professional activity, and receiving modest income. The scheme is also open to self-employed workers (non-salaried activity), but the paid SASU president falls, for the bonus, under the “employee” logic from the declarative point of view.
Key points:
- The SASU president is affiliated with the general scheme as an assimilated employee. They do not contribute to unemployment insurance under their mandate.
- For the Caf, “president of SAS/SASU” explicitly appears in the category “considered as employee” for resource declaration.
- The activity bonus is non-taxable and calculated per household.
Amounts and 2025 Formula: Numerical Benchmarks
Since April 1, 2025, the official formula is:
Bonus = (Flat amount possibly increased + 59.85% of household professional income + bonuses) – household resources taken into account.
Flat amount (single person without children): €633.21. Increase of 50% for the 1st additional person, 30% for each following one, specific rules for single parents.
Individual bonus: activates when the average net income per worker exceeds €700.92 per month, then grows up to a maximum reached around €1,425.60 net (maximum bonus amount ≈ €184.27 per eligible person). The average is assessed over the last 3 months considered.
Housing allowance (if the household benefits from housing aid): monthly flat deduction retained in the calculation (2025 order of magnitude: ≈ €76 for 1 person, ≈ €152 for 2, ≈ €188 for 3+). It mechanically reduces the calculated bonus.
Considered resources: salaries/mandates (net social amount), non-salaried profits, taxable benefits, pensions, replacement income, and most capital/asset income. The whole is considered at the household level.
Time reference: since March 2025, for Caf beneficiaries, the quarterly declaration is pre-filled and based on the months M-2 to M-4 (no longer M-1 to M-3). The MSA follows thereafter.
Lawful optimization strategies for a SASU president
Objective: stabilize a net remuneration compatible with the bonus and limit the “resources” that reduce the bonus, without artifices and respecting social and tax rules.
1) Smooth remuneration around useful thresholds
- Threshold €700.92: aim for an average monthly net above this level to activate the bonus.
- Bonus maximization zone: between ~€1,200 and ~€1,450 net, the bonus approaches its ceiling. Beyond that, the marginal effect decreases.
- Avoid big fluctuations: favor regular remuneration rather than “blank” months followed by a large payment that would lower the 3-month average.
2) Balance salary / other flows
- Mandate salary: counts as professional income and triggers the bonus beyond €700.92.
- Dividends and capital income: generally considered as household resources and can reduce entitlement. Avoid paying them during the reference period if the goal is to secure the bonus.
- Benefits in kind / exceptional bonuses: included in the net social amount. Prefer stable amounts to smooth out.
3) Manage the impact of housing
- Housing aid: triggers a housing allowance that reduces the bonus. Anticipate this deduction in your simulations.
- Without housing aid: no housing allowance. The potential bonus is higher with equal resources.
4) Anticipate the 2025 pre-filling
- Net social amount (NSA): the payslip shows the NSA. This is the reference figure for the Caf.
- Pre-display: your salaries from M-2 to M-4 are now pre-filled. Check and correct if necessary, with supporting documents.
Practical numerical cases (single person, no other income, no housing assistance)
Teaching method: the formula is understood as Bonus ≈ Flat rate – 40.15% of net + bonus (if > 700.92 €). Illustrated below for indicative purposes; the Caf is authoritative. Actual amounts vary with household composition, other income, and possible housing flat rate.
| Monthly net (average) | Estimated bonus | Indicative activity bonus | Interpretation |
|---|---|---|---|
| 650 € | 0 € (under 700.92 €) | ≈ 633.21 – 0.4015×650 = ≈ 372 € | No bonus. Significant bonus. |
| 900 € | ≈ 90 € | ≈ 633.21 – 0.4015×900 + 90 = ≈ 362 € | Bonus active, interesting net effect. |
| 1,250 € | ≈ 170 € | ≈ 633.21 – 0.4015×1,250 + 170 = ≈ 300 € | Bonus close to max. |
| 1,450 € | ≈ 184 € (ceiling) | ≈ 633.21 – 0.4015×1,450 + 184 = ≈ 236 € | Bonus decreasing but still present. |
| 1,900 € | ≈ 184 € | ≈ 633.21 – 0.4015×1,900 + 184 = ≈ 56 € | Close to exit ceilings for a single person. |
With housing assistance: subtract the housing flat rate (≈ 76 €/152 €/188 € depending on household size). Example at 1,250 € net with APL for 1 person: bonus ≈ 300 € – 76 € = ≈ 224 €.
Case “Irregular SASU”: 0 € / 2,100 € / 1,300 € over the quarter
Average = (0 + 2,100 + 1,300) / 3 = 1,133 €. The bonus is active but less than with 3 months at 1,133 €. Conclusion: favor smoothed monthly salaries to optimize the average and avoid a month at 0.
Case “Dividends” in Q2
If the household receives dividends or other capital income during the reference period, they are added to resources and reduce the bonus. Conclusion: for an optimization strategy, avoid distributions during the M-2 to M-4 window when the activity bonus is a priority objective.
Common mistakes and risks
- Confusing net paid and social net amount: the MNS is the Caf reference. Check your payslips.
- Forgetting household income: the bonus is calculated per household. A better-paid spouse can cancel the entitlement.
- Paying dividends “at the wrong time”: this can reduce the quarterly bonus.
- Sudden variations: monthly spikes degrade the 3-month average and the bonus.
- Inaccurate declarations: with pre-filling, discrepancies must be justified. Overpayments are recovered.
2025 Process: pre-filling, periods and simulators
Generalized pre-filling since March 2025 at the Caf. Your salaries from months M-2 to M-4 are pre-displayed thanks to “social net amount” flows. You check, correct if necessary and attach supporting documents. The reference resource period becomes M-2 to M-4. The MSA also adopts the system.
Tools: official Caf simulator and mesdroitssociaux.gouv.fr portal to estimate, then apply online via your Caf/MSA space.
Tax and Social Vigilance Points for the SASU
- Social base: adjust the remuneration while remaining consistent with protection needs (daily sickness benefits, retirement). A net salary that is too low penalizes your social rights.
- Employer contributions: for an assimilated employee, the total cost of a net salary is high. Include the additional cost in your budget.
- Consistency check: align payroll, DSN, accounting entries, and amounts declared to the Caf.
- Dividends: balance the schedule and amount so as not to cancel out the activity bonus for the quarter.
- Single parent / household with children: significant increases to the basic allowance. Re-run the simulation whenever a child enters or leaves the household.
FAQ
Can an unpaid president of a SASU receive the activity bonus?
No, the bonus requires professional income. Without remuneration during the M-2 to M-4 period, there is no entitlement, except for other professional activity in the household.
What is the “right” salary level to optimize the bonus?
In practice, aim above €700.92 net to trigger the bonus, then stabilize between approximately €1,200 and €1,450 if the rest of the household’s resources are low. Re-simulate with each change in situation.
Do dividends paid by the SASU count as resources?
Yes, capital and asset income are generally taken into account as household resources. They can reduce the bonus. Avoid distributing them during the reference period if the goal is optimization.
How does the pre-filled declaration work since 2025?
The Caf pre-displays salaries from M-2 to M-4 via the “net social amount.” You verify, correct if necessary, and provide supporting documents. The amount is then fixed for 3 months.
I receive housing assistance. What is the impact?
The Caf applies a housing allowance (≈ €76/€152/€188 depending on household size). It reduces the calculated activity bonus.
Is the activity bonus taxable?
No. It is not declared for income tax purposes.
Sources
- Ministry of Economy — Activity bonus: amounts, 59.85%, bonus, pre-filling (updated 04/01/2025)
- Legifrance — Decree 2024-403 of May 1, 2024 (previous revaluations)
- Caf — SAS/SASU managers considered as employees for declarations