How much should you set aside each month to live comfortably in retirement? This is the question millions of people living and working in France face, and the answer varies considerably depending on the age at which you start saving, the standard of living you wish to maintain and the returns earned on your savings. According to the COR (Conseil d'Orientation des Retraites, France's official pension advisory council), the average replacement rate -- that is, the ratio between your first pension payment and your last working income -- sits between 50% and 75% for private-sector employees. This means that without supplementary savings, most retirees experience a significant drop in purchasing power.
This guide offers a clear calculation method and concrete tables to help you determine the monthly savings effort appropriate to your situation.
The 25x Annual Expenses Rule
The 25x rule, originating from the financial independence community and validated by the famous "Trinity Study" conducted by three finance professors at Trinity University in 1998, provides a reliable benchmark for estimating the capital needed at retirement.
The principle is simple: to withdraw 4% of your capital each year without depleting your savings over a period of 25 to 30 years, you need capital equal to 25 times your annual retirement income shortfall.
In other words, if you estimate that you need 1,000 euros per month to supplement your state pension, you need capital of 1,000 x 12 x 25 = 300,000 euros. For 1,500 euros per month of supplementary income, you need 450,000 euros. For 2,000 euros, 600,000 euros.
Why 4% and not more?
The 4% withdrawal rate (sometimes called the "Safe Withdrawal Rate") was established taking into account inflation, market volatility and a retirement duration of 25 to 30 years. With a diversified portfolio of equities and bonds, this rate statistically avoids depleting your capital in 95% of historically tested scenarios. If you want an extra safety margin, aim for a 3.5% withdrawal rate (i.e., capital equal to 28.6 times your annual expenses). Conversely, if you have other income sources (rental property, life annuity), a 4.5% rate may be considered.
Replacement Rates by Scheme: What You Will Receive
Before calculating your savings effort, you need to estimate what the mandatory pension system will pay you. Replacement rates vary considerably across schemes and income levels.
For a private-sector employee (regime general + AGIRC-ARRCO complementary pension), the gross replacement rate generally sits between 50% and 75% of the last gross salary. The higher the income, the lower the replacement rate, because contributions are capped beyond the annual Social Security ceiling (PASS, or Plafond Annuel de la Securite Sociale), set at 47,100 euros in 2026.
For civil servants (fonctionnaires), the replacement rate has historically been higher (around 75% of the gross indexed salary excluding bonuses), but the 2023 reform and the gradual introduction of the RAFP complementary pension are changing this balance.
For self-employed workers (TNS -- travailleurs non salaries), including artisans, traders and liberal professionals, replacement rates are often the lowest, sometimes below 40% of working income. This is why personal retirement preparation is even more crucial for these professions.
Here is an indicative table of average net replacement rates observed in 2026:
- Employee at the SMIC (minimum wage): approximately 75% of last net income
- Employee earning between 1 and 2 PASS: approximately 60-65% of last net income
- Senior executive earning between 2 and 4 PASS: approximately 50-55% of last net income
- Top executive above 4 PASS: approximately 35-45% of last net income
- Category A civil servant: approximately 65-70% of last net salary
- Artisan or trader: approximately 40-50% of last net income
- Liberal professional: approximately 30-45% of last net income
Monthly Savings Tables by Starting Age and Target
The tables below show the monthly savings required to accumulate a given capital amount by age 64, depending on the age at which you start saving. The calculations assume an annual return of 5% net of fees (a reasonable assumption for a diversified equity/bond portfolio over the long term) and account for inflation of 2% per year.
Target: 200,000 euros of capital at age 64
- Starting at 25 (39 years of saving): 155 euros per month
- Starting at 30 (34 years of saving): 205 euros per month
- Starting at 35 (29 years of saving): 275 euros per month
- Starting at 40 (24 years of saving): 375 euros per month
- Starting at 45 (19 years of saving): 535 euros per month
- Starting at 50 (14 years of saving): 815 euros per month
- Starting at 55 (9 years of saving): 1,480 euros per month
Target: 400,000 euros of capital at age 64
- Starting at 25 (39 years of saving): 310 euros per month
- Starting at 30 (34 years of saving): 410 euros per month
- Starting at 35 (29 years of saving): 550 euros per month
- Starting at 40 (24 years of saving): 750 euros per month
- Starting at 45 (19 years of saving): 1,070 euros per month
- Starting at 50 (14 years of saving): 1,630 euros per month
- Starting at 55 (9 years of saving): 2,960 euros per month
Target: 600,000 euros of capital at age 64
- Starting at 25 (39 years of saving): 465 euros per month
- Starting at 30 (34 years of saving): 615 euros per month
- Starting at 35 (29 years of saving): 825 euros per month
- Starting at 40 (24 years of saving): 1,125 euros per month
- Starting at 45 (19 years of saving): 1,605 euros per month
- Starting at 50 (14 years of saving): 2,445 euros per month
- Starting at 55 (9 years of saving): 4,440 euros per month
The conclusion is clear-cut: each year of delay in starting your retirement savings significantly increases the monthly effort required. Starting at 25 rather than 45 reduces the monthly amount needed by more than threefold for the same target.
The Power of Compound Interest
Compound interest is the most powerful mechanism in long-term savings. The principle is simple: the gains generated by your savings are reinvested and themselves generate gains, which are reinvested in turn, and so on. This exponential growth produces spectacular results over long periods.
To illustrate this power concretely, consider a monthly contribution of 300 euros with an annual net return of 5%:
- After 10 years: capital of 46,600 euros (including 10,600 euros in interest)
- After 20 years: capital of 123,300 euros (including 51,300 euros in interest)
- After 30 years: capital of 249,300 euros (including 141,300 euros in interest)
- After 40 years: capital of 457,600 euros (including 313,600 euros in interest)
Notice that over 40 years, compound interest accounts for nearly 70% of the final capital. Your money has worked far harder than you have. Over the last 10 years, it is the interest on interest on interest that generates most of the growth. This is why starting early is so decisive.
Compound interest works in reverse too
If compound interest is the saver's best ally, it is also the borrower's worst enemy and the trap of high fees. Annual management fees of 2% instead of 0.5% may seem trivial, but over 30 years they reduce your final capital by nearly 35%. Similarly, inflation compounds its effects in the same way: at 2% per year, purchasing power is halved in 35 years. This is why it is essential to minimize fees and seek positive real returns (after inflation).
The Impact of Fees on Your Final Capital
Fees are the main drag on the long-term performance of your retirement savings. They generally consist of entry fees (deducted from each payment), annual management fees (deducted from the outstanding balance) and sometimes arbitrage fees (when switching between investment supports).
Here is the real impact of fees on a monthly contribution of 400 euros over 30 years, with a gross return of 6%:
- Total fees of 0.5% per year: net final capital of 330,000 euros
- Total fees of 1.0% per year: net final capital of 290,000 euros
- Total fees of 1.5% per year: net final capital of 255,000 euros
- Total fees of 2.0% per year: net final capital of 225,000 euros
- Total fees of 2.5% per year: net final capital of 198,000 euros
- Total fees of 3.0% per year: net final capital of 175,000 euros
The difference between a contract with 0.5% fees and one with 3% fees is 155,000 euros over 30 years -- nearly 45% of the final capital. This finding strongly favours low-fee online contracts (PER and assurance vie from providers like Linxea, Placement-direct, Yomoni or Nalo) over traditional bank contracts that charge significantly higher fees.
Entry fees, still charged by many traditional banks (up to 3 to 5% of contributions), are dead weight. Online contracts generally charge 0% entry fees. As for annual management fees, on a balance of 300,000 euros, the difference between 0.6% and 2% in fees represents more than 4,000 euros of lost earnings each year.
Adapting Your Savings Effort to Your Situation
The 15-20% of Net Income Rule
Financial planners generally recommend saving between 15% and 20% of your net income for retirement. This rate includes all contributions intended for retirement preparation: PER, life insurance (assurance vie), PEA (Plan d'Epargne en Actions), rental property investment.
For a net salary of 2,500 euros per month, this represents 375 to 500 euros in monthly savings. For a net salary of 4,000 euros, between 600 and 800 euros. These amounts may seem ambitious, but they are achievable by optimizing spending and gradually increasing your savings rate with each pay rise.
The Progressive Step Method
If you cannot immediately reach 15 to 20% savings, adopt the step method. Start by saving 5% of your net income, then increase by 1 to 2 percentage points each year or with each salary increase. This gradual progression is psychologically more manageable and allows your lifestyle to adjust smoothly.
For example, on a net salary of 3,000 euros: start with 150 euros per month (5%), then move to 210 euros (7%), 270 euros (9%), 360 euros (12%), then 450 euros (15%) over 5 years. The effort is gradual and spending habits adjust naturally.
Employee Savings as an Accelerator
If your employer offers an employee savings scheme (PEE, PERECO, PERCOL -- these are French workplace savings plans), take full advantage. Employer matching ("abondement") is free money added on top of your personal contributions. A 300% match on the first 500 euros contributed means your 500-euro payment becomes 2,000 euros in your savings plan. No investment in the world can offer an immediate 300% return.
Adjustments by Profile
Catching Up After 45
If you start late, you must compensate with a more intensive savings effort and a more dynamic asset allocation (while being careful to calibrate risk according to your remaining investment horizon). Take advantage of the PER ceiling catch-up option: unused ceilings from the previous 3 years can be carried forward and combined with the current year's ceiling. A couple can thus contribute up to 8 annual ceilings in a single year in the event of exceptional income.
Self-Employed Workers
Self-employed workers (TNS -- artisans, traders, liberal professionals) have lower replacement rates and must therefore save more. The PER offers them a more generous deduction ceiling (10% of taxable profit + 15% of the portion of profit between 1 and 8 PASS). The recommended savings effort is 20 to 25% of net professional income for these professions.
Couples: Optimizing Together
Retirement planning as a couple allows for additional optimizations. Married spouses or civil partners (PACS) can pool unused PER ceilings. Diversifying savings wrappers between both partners maximizes tax advantages and inheritance allowances. Also consider the survivor's pension (pension de reversion), whose amount and conditions vary by scheme.
Conclusion: Start Now, Adjust Later
The exact amount to save for retirement depends on many personal factors. But one thing is certain: it is better to start with an imperfect amount than not to start at all. The effect of compound interest rewards early action far more than intensity.
Use our PER simulator to refine your projections based on your personal situation. And remember this essential rule: every euro invested today is worth far more than a euro invested tomorrow, thanks to the power of compound interest.
The amounts shown in this article are based on average return and inflation assumptions. Past performance is not indicative of future results. Consult a wealth management advisor for a personalized simulation.