The prime d'activité is a monthly financial aid provided to low-income workers in France who are 18 years or older. It is available to employees, civil servants, and self-employed individuals and is managed by the family allowance funds (CAF) or the Agricultural Social Mutual (MSA). The amount received depends on the household's composition, including the number of children or dependents, and is calculated using a base amount, 61% of the household's income, and a bonus, after subtracting other resources, family benefits, and housing allowances. For 2026, the base amounts in Metropolitan France and the overseas departments (DOM, excluding Mayotte) are set at 638.28 euros for a single person without children and 957.42 euros for a couple without children. Each additional child or dependent adds 255.32 euros to the base amount. Single parents receive higher amounts, with a pregnant woman receiving 896.22 euros instead of 819.63 euros, and a single parent with one child getting 1,246.03 euros instead of 1,092.84 euros. The bonus part of the prime d'activité is calculated based on each household member's professional income, with limits depending on the household size. For a single person without children, the limit is 1.5 times the minimum wage, or about 2,100 euros net per month in 2026. If a household receives housing assistance or has no housing costs, part of the prime d'activité is deducted from the housing allowance. The deduction amounts are 76.59 euros for a single person, 153.19 euros for two people, and 189.57 euros for three or more people. To determine eligibility for the prime d'activité, individuals can use a free simulation tool on the CAF website. The payment is made every month, on the 5th of the following month, and remains fixed for three months, even if family or work situations change. Every three months, individuals must report their income from the previous quarter to reassess their eligibility. If overpaid, the CAF or MSA may ask for repayment within two years.