Financial support or maintenance paid for a child or a former spouse during divorce proceedings is, except in rare cases, indexed to reflect changes in the cost of living.
This indexation ensures that the amount paid retains its purchasing power over time.
How is this adjustment calculated? When must it be applied, and by whom? What happens if the indexation is overlooked? This practical guide explains the key rules.
1. General principle of indexation
Child or spousal support indexation is based on the principle that the amount must be adjusted in line with changes in the cost of living.
French law provides that the court, or the parties by agreement, may include an indexation clause when setting child support.
In practice, the vast majority of child support payments are indexed to the Consumer Price Index published by INSEE, the French National Institute of Statistics.
2. When and how often must indexation be applied?
Indexation is generally applied annually, on the anniversary date of the court judgment or agreement setting the child support amount.
If the decision does not specify a date, indexation applies on the date of the first payment falling due after the decision.
3. Who must calculate the indexation and how?
It is the responsibility of the paying parent or spouse (the debtor) to automatically apply the annual indexation, in accordance with the judgment or agreement, without waiting for a request from the recipient.
The relevant indices are freely available on the INSEE website, which also provides an online calculator to determine the updated amount.
Calculation formula
There are two equivalent methods to calculate the revised amount:
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- Method 1: Initial child support amount × New index / Reference index stated in the judgment
- Method 2: Last indexed amount × New index / Previous year’s index
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Practical example
If the child support amount was €713.47 with a reference index of 101.47, and the current index is 103.86: 713.47 × 103.86 / 101.47 = €730.27
4. Can indexation be modified or removed?
The court or the parties are free to choose the reference index.
However, depending on the circumstances of the case, the court may refuse to apply indexation or may remove an indexation clause.
5. What happens if indexation is forgotten or not applied?
If the annual adjustment has not been applied, the recipient may claim retroactive payment of the indexed amounts.
This request may be made amicably by written notice. In the event of refusal or inaction by the debtor, enforcement measures may be initiated, including:
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- direct payment procedures through the Family Allowance Fund (CAF);
- enforcement by a judicial officer (Huissier); or
- court proceedings before the family court.
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The debtor is required to regularize the situation, including for prior years, subject to the applicable limitation period, which is generally five years.
6. Key points to consider
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- Indexation does not replace a revision of child support, which requires a significant change in circumstances and a court decision.
- While the choice of index is legally flexible, the INSEE Consumer Price Index is most commonly used.
- In the event of disputes or payment difficulties, referral to the competent family court or use of direct payment procedures is strongly recommended.
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Conclusion
Child or spousal support indexation is an automatic, simple and mandatory mechanism designed to preserve the recipient’s standard of living.
It is the responsibility of the paying party to apply the indexation each year without prior request.
If indexation is overlooked, the recipient may take legal action to recover the amounts due.
Where difficulties arise, recourse to the family court remains available to ensure a fair balance between needs and financial resources.
For further information or legal assistance, you may schedule an appointment.
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