The 4% Rule and FIRE in France: How to Calculate Your Financial Independence
Working until 67 isn't inevitable. The 4% rule gives you an exact mathematical framework for knowing how much you need to save to no longer depend on a salary. Here's how to apply it concretely in France.
The 4% rule: where it comes from
In 1998, three researchers at Trinity University analyzed all historical US portfolios since 1926. Their conclusion: a 60% stocks / 40% bonds portfolio survives 30 years of 4%/year withdrawals in 95% of historical scenarios.
Calculate your FIRE number
Simple formula: FIRE number = annual expenses × 25 (because 1 / 4% = 25).
| Annual net expenses | FIRE number |
|---|---|
| €12,000/yr (€1,000/month) | €300,000 |
| €18,000/yr (€1,500/month) | €450,000 |
| €24,000/yr (€2,000/month) | €600,000 |
| €36,000/yr (€3,000/month) | €900,000 |
| €48,000/yr (€4,000/month) | €1,200,000 |
After 5 years in a PEA, only social charges (18.6%) apply on gains — no income tax. For a €24,000/year withdrawal from a PEA, your FIRE number stays close to €600,000, vs ~€857,500 in a standard $args[0].Value -replace '30%', '31,4%' ). That's €257,500 less to accumulate just by using the right account.
How long does it take to reach FIRE?
| Savings rate | Years to FIRE |
|---|---|
| 10% | ~43 years |
| 20% | ~37 years |
| 30% | ~28 years |
| 40% | ~22 years |
| 50% | ~17 years |
| 65% | ~10.5 years |
Assumption: 7% real annual return. Start at 25 with a 40% savings rate → FIRE at 47, 20 years before the legal retirement age.
France-specific advantages
- Universal healthcare: no need to budget €500+/month for health insurance like in the US. Social security + supplemental = €100-200/month. Massive difference on your FIRE number.
- PEA tax wrapper: after 5 years, gains taxed at 18.6% only. US capital gains tax can reach 23.8%. France wins.
- Lower cost of living outside Paris: €1,500/month net is comfortable in Nantes, Montpellier, or Brittany.
- State pension: if you qualify, your state pension at 67 reduces your required FIRE number. Example: if you expect €800/month state pension and need €2,000/month total, your FIRE portfolio only needs to cover €1,200/month.
Track your FIRE progress on TREESTEP
TREESTEP turns the path to financial independence into an RPG: XP for every investment, progress levels, guilds of FIRE walkers. Visualize your distance to your FIRE number and stay motivated across the 10, 20, 30-year journey.
Calculate my FIRE number →FAQ
Is the 4% rule safe for 50+ year retirements?
For FIRE at 40, you might withdraw for 50+ years, not 30. Recent research suggests a more conservative 3% to 3.5% withdrawal rate for very long retirements. At 3.5%: FIRE number = expenses × 28.6 instead of × 25.
FIRE with children — is it compatible?
Yes, but your FIRE number increases with children. Studies show a child in France costs €500-800/month until age 18. You can adapt: partial FIRE while children are young, full FIRE when they're independent.