The flat tax and social contributions
France applies a flat tax, the prelevement forfaitaire unique, to most capital gains and investment income, combining a fixed income tax rate with social contributions into a single overall rate. Taxpayers can sometimes elect for gains to be taxed under the progressive income tax scale instead, if that produces a better outcome given their personal circumstances, though this also affects how social contributions are calculated.
The exact flat tax rate and its split between income tax and social contributions have changed in past budgets and can change again. Confirm the current rate with a French tax adviser before making decisions based on it.
Comparing tax regimes across instruments
| Instrument | Tax on exercise or acquisition | Tax on eventual sale |
|---|---|---|
| BSPCE | Generally none | Gain taxed under the BSPCE regime, often the flat tax, with tenure sometimes affecting the rate |
| AGA free shares | Acquisition gain taxed on vesting or sale, under specific AGA rules | Additional capital gain from vesting price to sale price, often flat tax |
| Stock options | Gain at exercise often taxed closer to employment income, depending on plan type | Further gain to sale usually taxed as capital gain |
Favourable tax rates for French startup warrants
For companies that qualify, BSPCE combines simple mechanics, low cost to the company, and a tax regime for employees that is generally more favourable than AGA or stock options, particularly for gains realised after a meaningful period of employment. This combination explains why almost every eligible French startup defaults to BSPCE for its employee equity plan and only turns to AGA or stock options when eligibility rules or specific circumstances rule BSPCE out.
- No tax due at exercise in most cases, avoiding a dry income problem
- Favourable rate on the eventual gain compared with ordinary stock options
- Simple to administer once the company's eligibility is confirmed
- Well understood by French investors and lawyers, reducing negotiation friction
Flat tax and regime questions
- Is BSPCE always better than AGA for employees?
- For eligible companies it is usually more tax efficient, but AGA free shares avoid the need for the employee to pay an exercise price, which can matter for cash flow. The right choice depends on the company and the individual employee's situation.
- Do social contributions apply to all these instruments?
- In most cases yes, though the rate and basis can differ between BSPCE, AGA and stock options. This is an area where current details should be confirmed with an adviser.
- Can an employee choose progressive tax instead of the flat tax on equity gains?
- In many cases an election for the progressive scale is available and can be beneficial for some taxpayers, but it changes how contributions and allowances apply, so it needs individual calculation.
General information for founders, not legal or tax advice. Thresholds and rates change, so confirm the current position with an adviser in the relevant country before granting.