Pay rise simulator: your net gain, month by month

How it is calculated

The simulator runs two complete calculations with the modele-social engine: your current situation, then the same situation with the increased gross. Everything displayed is a difference between the two: gross gain, net gain before tax, extra cost for the employer. As contributions are calculated band by band, the net gain is not exactly proportional to the gross gain: that is intended, it is what your payslip would do.

A percentage rise is applied to the monthly gross paid; a rise in euros per year is first divided by the number of months paid. The gain after tax, if you enter your rate at source, is the net gain multiplied by one minus that rate: an approximation, because a large rise can change your rate the following year.

What the result includes

So that two people get the same figure from the same gross pay, the site always calculates from the same baseline situation. Each line can be changed in the calculator's options where it matters.

• General social security scheme (régime général), rates as of 26 October 2026 (rules from modele-social, the engine behind URSSAF's simulator).
• Permanent full-time contract (CDI), 35 hours a week, i.e. 151.67 h a month, paid over 12 months.
• Non-cadre by default (cadre status is one button away), collective agreement set to the general rules (“droit commun”).
• Company health cover (mutuelle) of €40 a month, of which €20 is deducted from pay, URSSAF's default setting; zero is possible in the options.
• Outside Alsace-Moselle (option available), without meal vouchers or benefits in kind.
• Before income tax: tax withheld at source depends on your household and comes on top (see the “net after tax” tool).
• Minimum wage (SMIC) since 1 June 2026: €12.31 gross per hour (service-public.gouv.fr).
• Extra employer cost: difference in total cost between the two situations, with the general reduction recalculated in each.

Limits

A correct calculation for a typical situation is not your payslip. Here is what the tool does not know, so that you read the result as a reliable order of magnitude, not a promise.

• Collective agreement: sector minimums, seniority bonuses, compulsory thirteenth month and specific provident schemes are not taken into account (general rules only).
• Bonuses, variable pay, overtime, benefits in kind: left out, except in the tools that ask for them.
• Health cover and provident scheme: your actual contribution may be different; change it in the options.
• Alsace-Moselle: the option adds the local scheme's health contribution, without its other specifics.
• Public sector not covered: civil servants' pay scales and contributions follow other rules.
• Simplified tax: no tax reductions or credits, no exceptional income; the engine's “tax” module is flagged as experimental by URSSAF.
• Bonuses and variable pay: a rise in the variable share or a one-off bonus follows other rules (spreading, specific contributions) and is not simulated here.
• Change of status: moving from non-cadre to cadre with a promotion changes contributions; simulate both statuses separately.

What a pay rise brings

For €3,000 gross a month, non-cadre, twelve months: gross gain, net gain before tax and extra employer cost for a few common percentages. Amounts to the nearest euro, calculated by the site's engine.

How much should you ask for?

A percentage on its own means nothing: it all depends on your current salary compared with what job ads in your occupation pay, on your results over the year and on the company's health. Start by placing your salary with “Am I paid fairly?” or by searching for your occupation, then turn the gap into a pay rise with the simulator: you get a figure in gross annual terms, your employer's language, and its net monthly equivalent, yours.

The guide to asking for a pay rise gives you the method: the right moment, the arguments that land, the range to state and the answer to a refusal. And if the negotiation happens at hiring time, the guide to negotiating a job offer takes over.

What it costs the employer

The extra employer cost shown includes employer contributions on the rise, with the general reduction recalculated. It is almost always higher than your net gain: it is the figure your manager defends in front of their management. To see the detail of employer contributions on a given gross salary, use the employer cost tool; to know what will land in your account after tax at source, the net after tax calculator.