How to Apply Exemptions for Overtime in 2025: A Comprehensive Guide
Introduction: Why Master Overtime Exemptions?
Overtime hours are a critical lever of flexibility for companies in France. In 2025, the exemption scheme remains particularly advantageous for both employees and employers. However, its implementation in payroll raises many questions: what salary reduction rate should be applied? How to calculate the employer’s flat-rate deduction? How does it relate to other reductions in charges? This comprehensive guide, aimed at payroll managers and HR directors, details each mechanism based on the references from the Official Bulletin of Social Security (BOSS, boss.gouv.fr).
1. The Legal Framework for Overtime in 2025
1.1 Definition and Counting of Overtime
Overtime hours are defined as hours worked beyond the legal weekly duration of 35 hours, or any duration considered equivalent in certain sectors. Counting is done per calendar week, from Monday 00:00 to Sunday 24:00, unless a collective agreement provides for a different period of seven consecutive days.
The annual limit for overtime is set at 220 hours per employee, unless different contractual provisions are in place. Beyond this limit, mandatory rest compensation is added to the salary increase. It is imperative to distinguish between overtime and additional hours, with the latter concerning part-time employees only.
1.2 Applicable Increase Rates
In the absence of a collective agreement, the legal increases are as follows:
- 25% for the first 8 weekly overtime hours (from the 36th to the 43rd hour);
- 50% for subsequent hours (from the 44th hour onwards).
A company or branch agreement may set a different increase rate, which cannot be lower than 10%. This increase constitutes the base amount on which social and tax exemptions are then applied.
1.3 Regulatory Sources
The scheme is governed by Articles L. 241-17 and L. 241-18 of the Social Security Code, as well as by the BOSS, section “Exemptions for Overtime and Additional Hours” (paragraphs 10 to 320). Employers are encouraged to regularly consult the BOSS at boss.gouv.fr for updates.
2. Reduction of Employee Contributions
2.1 Principle of Reduction
Overtime and additional hours qualify for a reduction in old-age insurance employee contributions. This reduction applies to the remuneration paid for these hours, including the increase. It benefits all private-sector employees, regardless of the company’s size (BOSS, § 110 et seq.).
2.2 Calculation of the Reduction Rate
The reduction rate is equal to the sum of the old-age employee contribution rates actually borne by the employee. In 2025, this rate is broken down as follows:
| Contribution | Employee Rate | Base |
|---|---|---|
| Capped basic old-age | 6.90% | Band 1 (up to 1 PASS) |
| Uncapped basic old-age | 0.40% | Entire salary |
| Complementary pension T1 (Agirc-Arrco) | 3.15% | Band 1 |
| Complementary pension T2 (Agirc-Arrco) | 8.64% | Band 2 |
| CEG T1 | 0.86% | Band 1 |
| CEG T2 | 1.08% | Band 2 |
The reduction rate is capped at 11.31%. For an employee whose remuneration does not exceed the Social Security ceiling (€3,925 per month in 2025), the reduction rate will be the sum of the old-age contribution rates on Band 1, equating to approximately 11.31%. For an employee whose remuneration exceeds the ceiling, the calculation is made pro-rata based on the relevant bases, capped at 11.31% (BOSS, § 150).
2.3 Example of Employee Contribution Reduction
Consider a simple case of an employee earning €3,200 gross monthly (below the PASS), who works 4 hours of overtime in the month at an hourly rate of €25:
- Remuneration for overtime: 4 × €25 × 1.25 = €125.00
- Applicable reduction rate: 11.31%
- Amount of reduction: €125.00 × 11.31% = €14.14
Thus, the employee benefits from a reduction of €14.14 on their old-age employee contributions for that month.
3. Employer’s Flat-rate Deduction
3.1 Amounts and Workforce Thresholds
The employer can benefit from a flat-rate deduction of employer contributions for each overtime hour worked. The amount of this deduction depends on the size of the company:
- €1.50 per overtime hour for companies with fewer than 20 employees;
- €0.50 per overtime hour for companies with 20 to 249 employees.
Companies with 250 or more employees do not benefit from this flat-rate deduction. The workforce is assessed according to common law rules (average annual workforce, Article L. 130-1 of the CSS). The BOSS specifies in paragraphs 200 to 240 the methods of determining the workforce and the rules for exceeding thresholds.
3.2 De minimis Regime
The flat-rate employer deduction is subject to the EU de minimis regulation. The company must not have received more than €200,000 in de minimis aid over the last three fiscal years. The employer must be able to demonstrate compliance with this ceiling in the event of a URSSAF audit (BOSS, § 250).
3.3 Example of Employer Deduction
A company with 15 employees employs an employee who works 20 overtime hours in the month:
- Flat-rate deduction: 20 × €1.50 = €30.00
If the same company had 45 employees:
- Flat-rate deduction: 20 × €0.50 = €10.00
The deduction is deducted from the employer’s social security contributions due for the remuneration of the concerned employee, and not solely from the remuneration of the overtime hours.
4. The Specific Case of Days Forfait
4.1 Principle of Deduction for Employees on Days Forfait
Employees under an annual days forfait convention are not subject to the legal weekly duration of 35 hours. They may, therefore, by definition, not perform overtime in the traditional sense. However, when an employee on a days forfait relinquishes rest days beyond 218 days, these worked rest days qualify for a specific scheme (BOSS, § 270).
4.2 Amount of Deduction
The flat-rate employer deduction is set at €3.50 for each day of rest relinquished by the employee. This deduction is also subject to the de minimis regime (ceiling of €200,000 over 3 years) and the same conditions of workforce as the hourly deduction.
4.3 Practical Example
A manager on a 218-day forfait forgoes 10 rest days in the year, bringing their total to 228 days. The company (with 12 employees) benefits from a deduction of:
- 10 × €3.50 = €35.00
The salary increase for these worked rest days must be at least 10% (Article L. 3121-59 of the Labour Code), or more if provided for by a collective agreement. The reduction in employee contributions also applies to this increase.
5. Cumulative Effect with Other Reductions in Charges
5.1 Interaction with General Contribution Reduction (Formerly Fillon Reduction)
The flat-rate employer deduction for overtime is cumulative with the general reduction of employer contributions (Article L. 241-13 of the CSS). In practice, the employer can apply the general reduction to all remuneration and the flat-rate deduction to overtime simultaneously (BOSS, § 290).
However, the remuneration for overtime and additional hours is taken into account in calculating the coefficient for the general reduction. This means that overtime, by increasing total remuneration, may reduce the coefficient of the general reduction and thus the amount of the relief.
5.2 Interaction with Other Schemes
The employee contribution reduction on overtime is cumulative with all schemes for exempting employer contributions (ZRR, ZFU, BER, hiring assistance, etc.). However, the BOSS specifies that the flat-rate employer deduction can only be cumulative with the general reduction and not with targeted or zone-specific exemptions (BOSS, § 300).
6. Tax Exemption for Overtime
6.1 Exemption Ceiling
Remuneration received for overtime and additional hours is exempt from income tax within the limit of €7,500 net per year. This ceiling is assessed per employee and per calendar year. It includes both the salary increase and the remuneration for the hours themselves (Article 81 quater of the CGI).
6.2 Calculation of Exempt Amount
The net amount exempt from tax corresponds to the gross remuneration for overtime, reduced by the remaining employee contributions due after applying the employee contribution reduction. Example:
- Monthly gross remuneration for HS: €500.00
- Remaining employee contributions (non-exempt CSG/CRDS, insurance, etc.): approximately €50.00
- Reduction in employee contributions: €500 × 11.31% = €56.55
- Net amount exempt from tax: €500 – €50 + €56.55 ≈ €506.55
Over the year, if the employee accumulates €6,000 net of exempt overtime, they remain under the ceiling of €7,500, and the entire amount is exempt from income tax.
6.3 Reporting Obligations
The employer must declare the amount of exempt overtime in the DSN (specific section S21.G00.52). The employee will find this amount pre-filled in their income tax declaration. In case of exceeding the ceiling of €7,500, the excess is reintegrated into the taxable income.
7. Additional Hours of Part-time Employees
7.1 Eligibility for Exemptions
Additional hours performed by part-time employees qualify for the same exemptions as overtime for full-time employees (BOSS, § 130):
- Employee contribution reduction (same rate, capped at 11.31%);
- Tax exemption up to €7,500 net per year.
However, the flat-rate employer deduction does not apply to additional hours. Only overtime (beyond 35 hours or the contractual duration) permits entitlement to the employer deduction.
7.2 Increase for Additional Hours
Additional hours are increased by:
- 10% for hours worked within the limit of 1/10th of the contractual duration;
- 25% for hours worked beyond 1/10th and up to 1/3 of the contractual duration.
7.3 Example Calculation
A part-time employee (28 hours/week) works 3 additional hours during the week at an hourly rate of €15:
- 1/10th of 28 h = 2.8 h → 2.8 h increased by 10% and 0.2 h increased by 25%
- Remuneration for additional hours: (2.8 × 15 × 1.10) + (0.2 × 15 × 1.25) = 46.20 + 3.75 = €49.95
- Employee contribution reduction: 49.95 × 11.31% = €5.65
8. DSN Treatment and Key Points of Attention
8.1 Declaration in DSN
In the DSN, overtime and additional hours must be declared with the following specific codes:
- Block S21.G00.51: remuneration with type “overtime” or “additional hours”;
- Block S21.G00.52: amount of employee contribution reduction (CTP 003) and flat-rate employer deduction (CTP 004);
- Block S21.G00.81: net amount exempt from income tax.
8.2 Points of Attention for Payroll Managers
Several points warrant particular attention:
- Compensatory Rest: when overtime is fully compensated with rest, it does not qualify for employee contribution reduction or employer deduction (BOSS, § 160).
- Therapeutic Part-time: hours worked beyond the reduced contractual duration for medical reasons are still eligible additional hours.
- Multiple Employers: the tax exemption ceiling of €7,500 is assessed globally, across all employers.
- URSSAF Audit: the employer must be able to justify the number of actual overtime hours worked (time sheets, weekly counts).
9. Summary: Recap Table of Exemptions 2025
| Scheme | Beneficiary | Amount / Rate | Conditions |
|---|---|---|---|
| Reduction of employee contributions | Employee | Up to 11.31% | All employers |
| Flat-rate employer deduction | Employer < 20 employees | €1.50/hour | De minimis €200,000/3 years |
| Flat-rate employer deduction | Employer 20-249 employees | €0.50/hour | De minimis €200,000/3 years |
| Flat-rate for days | Employer | €3.50/day | Days of relinquished rest |
| Tax exemption | Employee | Up to €7,500 net/year | Overtime and additional hours |
FAQ: Frequently Asked Questions on Overtime Exemptions
Are structural overtime hours specified in the contract eligible for exemptions?
Yes. As long as these hours are performed beyond the legal duration of 35 hours and are compensated with the corresponding increase, they qualify for employee contribution reduction and flat-rate employer deduction, even when contractually stipulated. The BOSS does not differentiate between occasional and structural overtime (BOSS, § 120).
How to handle overtime in case of annualisation of working time?
In cases of modulation or annualisation of working time, overtime is counted beyond 1,607 annual hours (or the limit set by the agreement). Exemptions apply at the time of regularisation at the end of the reference period. Some hours may also be identified during the period when exceeding a high weekly limit set by the agreement (BOSS, § 140).
Is the flat-rate employer deduction cumulative with ZRR or ZFU exemptions?
No. The flat-rate employer deduction for overtime is only cumulative with the general reduction of employer contributions (formerly Fillon). It is not cumulative with zoned exemptions (ZRR, ZFU, BER) or other targeted exemptions (BOSS, § 300). The employer must choose the most beneficial scheme.
Can an apprentice benefit from exemptions on overtime?
Yes. Overtime worked by an apprentice qualifies for employee contribution reduction under the same conditions as for other employees. The flat-rate employer deduction is also applicable if the workforce conditions are met. However, for apprentices whose remuneration is below 50% of the SMIC, as employee contributions are already exempted, the reduction may be moot (BOSS, § 180).
What happens if the €7,500 ceiling for tax exemption is exceeded?
When the net remuneration for overtime and additional hours exceeds €7,500 in the calendar year, the excess is reintegrated into the employee’s taxable income. The employer must adjust the amount declared in the DSN at the end of the year. The employee receives the correct amount on their pre-filled declaration. Social contribution exemptions are not affected by this tax ceiling; they continue to apply without monetary limitation.