To receive a net pension of 1,700 euros per month, the gross monthly salary while working is not sufficient as a reference. The final amount depends on a formula that combines three variables: the average annual income, the number of validated quarters, and the liquidation rate applied by the fund. Understanding each of these variables allows for setting a realistic goal and identifying levers for action before retirement.
From gross to net: the social contributions that separate the displayed pension from the actual amount
Most simulators display a gross amount. The gap with the net received in the bank account comes from social contributions deducted at source: CSG, CRDS, and the additional solidarity contribution for autonomy (CASA).
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According to La Finance pour Tous and Sapiendo, these contributions can reach up to 9.1% on the basic pension and up to 10.1% on the supplementary pension, at the maximum rate. The rate applied depends on the reference tax income of the retiree: the most modest households benefit from a reduced rate or even an exemption.
To achieve 1,700 euros net before tax, one must therefore aim for a gross pension of approximately 1,870 to 1,880 euros if the maximum rates apply. Before any projection on the necessary salary while working, it is useful to calculate your retirement 1700 net on Comment Investir to frame this target gross amount according to your tax situation.
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Calculation formula for the basic pension for private sector employees
The basic pension paid by the Retirement Insurance follows a unique formula:
Average annual income x liquidation rate x (insurance duration / required duration).
The average annual income
For a private sector employee, this income corresponds to the average of the 25 best years of gross salary, revalued by coefficients set each year. Years of low activity or non-compensated unemployment do not count among the 25 selected, which can either benefit or penalize the calculation if the career has less than 25 full years.
The liquidation rate
The maximum rate is 50%. It applies when the required number of quarters is reached (full rate). Each missing quarter results in a reduction that lowers this rate to a floor of 37.5%. The reduction represents a penalty of 0.625% for each missing quarter, up to a limit of 20 quarters.
The prorating coefficient
This ratio compares the validated insurance duration to the required duration for the full rate. An employee who has validated 160 quarters out of the 172 required will see their pension reduced proportionally, even if they have reached the legal age.
Required quarters and legal age after the 2023 reform
The 2023 pension reform has gradually raised the legal retirement age to 64 years. The number of quarters needed to obtain the full rate now reaches 172 quarters for the affected generations, which is 43 years of contributions.
For a target of 1,700 euros net, this data changes the strategy. The main lever is no longer solely the salary level at the end of the career, but the ability to validate all 172 quarters, or even exceed them to benefit from the bonus (1.25% increase for each additional quarter beyond the full rate).
- Each missing quarter simultaneously applies a reduction on the rate and a decrease via the prorating coefficient, producing a double negative effect on the final amount.
- Buying back quarters (for higher education or incomplete years) remains possible, but its cost increases with age and income level at the time of repurchase.
- Quarters validated for unemployment, illness, or maternity count towards the insurance duration but do not generate rights to supplementary retirement.
Agirc-Arrco supplementary pension: the difference maker
The basic pension alone almost never allows reaching 1,700 euros net. The supplement comes from the mandatory supplementary pension Agirc-Arrco for private sector employees.
Its calculation is based on a points system: each year, the contributions paid are converted into points according to a purchase price. At the time of retirement, the total number of points is multiplied by the service value of the point, set annually by the social partners.
The supplementary amount therefore directly depends on the level of salary contributed throughout the career, not just the 25 best years. A stable career at a salary above the Social Security ceiling generates more points on tranche 2, significantly inflating the total pension.
What gross salary to aim for to achieve 1,700 euros net pension
The answer varies according to career length, salary profile, and scheme. For a private sector employee who has validated their 172 quarters with a relatively linear career, the net replacement rate (the ratio between the net pension and the last net salary) generally ranges between 50% and 75%.
With a replacement rate of 70%, reaching 1,700 euros net pension implies a last net salary of around 2,430 euros. With a rate of 55%, this last salary rises to about 3,090 euros net. These orders of magnitude illustrate the range of the gap depending on the profile.
- A senior executive whose salary exceeds the Social Security ceiling has a lower replacement rate because the basic pension is capped.
- A non-executive employee with a stable salary benefits from a more favorable replacement rate, but their average salary is mechanically lower.
- Part-time periods or career interruptions reduce both the average annual income and the number of supplementary points accumulated.
The official simulator available on Info-Retraite (my retirement estimate) remains the only tool that aggregates data from all the schemes to which a worker has contributed. Any manual estimate using the basic formula captures only part of the final amount, without the supplementary pension or any additional schemes.
Aiming for 1,700 euros net in retirement per month requires cross-checking three verifications: the target gross after social contributions, the complete validation of the required quarters, and the sufficient accumulation of supplementary points. Neglecting any one of these three parameters skews the estimate by several hundred euros per month.