SMIC 39H: how to calculate gross and net ?
01 June 2026 · 3 min reading time
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The 39-hour SMIC helps estimate the minimum wage of an employee working 39 hours per week. Since the legal working time in France remains 35 hours per week, any hours worked beyond that must be paid as overtime, with an increased rate provided either by law or by the applicable collective agreement.
Since June 1, 2026, the gross hourly SMIC has been set at €12.31. For an employee paid at the SMIC and working 39 hours per week, the monthly salary reaches around €2,133.73 gross, including the 4 weekly overtime hours paid with a 25% increase. Here is how to calculate the gross and net salary for 39 hours, understand possible exemptions and check the lines shown on the payslip.
Key points to remember about the 39-hour SMIC in 2026
What is the 39-hour SMIC?
The 39-hour SMIC is not an official amount set separately by law. It refers to the minimum wage applicable to an employee paid at the SMIC who works 39 hours per week.
The legal working time remains 35 hours per week. Hours worked beyond that are therefore considered overtime and must be paid at an increased rate, unless a specific provision is set by an agreement or collective agreement.
The 39-hour SMIC therefore corresponds to the monthly 35-hour SMIC, plus the pay for overtime hours worked each month.
How to calculate the gross 39-hour SMIC in 2026
To calculate the gross 39-hour SMIC, you need to start from the legal minimum wage for 35 hours, then add the pay for the 4 overtime hours worked each week. These overtime hours are generally paid with a 25% increase, unless a more favorable provision is set by the collective agreement applicable to the company.
Step 1: the base 35-hour SMIC
Since June 1, 2026, the gross hourly SMIC has been set at €12.31.
For a full-time 35-hour contract, this corresponds to:
€12.31 × 35 h × 52 ÷ 12 = €1,867.02 gross per month
Step 2: monthly overtime hours
An employee working 39 hours per week works 4 overtime hours per week.
4 h × 52 weeks ÷ 12 months = 17.33 overtime hours per month
Step 3: applying the increase
Each overtime hour is paid with a 25% increase.
- Standard hourly rate: €12.31
- Hourly rate increased by 25%: €12.31 × 1.25 = €15.39
- Monthly amount of overtime: 17.33 h × €15.39 = €266.71 gross
Final result
By adding the base salary and overtime pay:
- 35-hour gross salary: €1,867.02
- Increased overtime pay: €266.71
- Gross 39-hour SMIC: €2,133.73 per month
Over a full year, this represents approximately:
€2,133.73 × 12 = €25,604.76 gross per year
This calculation shows that an employee paid at the 39-hour SMIC earns around €266.71 gross more each month than an employee working 35 hours.
How to calculate the net 39-hour SMIC in 2026
While the gross salary helps understand the calculation basis on the payslip, what employees are usually most interested in is the net salary, meaning the amount actually paid into the bank account after social security contributions have been deducted.
The net calculation for 39 hours should be interpreted with caution. Overtime hours benefit from a specific social and tax regime: they may be exempt from income tax within certain limits and may also benefit from a reduction in employee contributions.
As an indication, by applying a net-to-gross ratio close to that of the 35-hour SMIC, the net salary for 39 hours can be estimated at around:
€2,133.73 × 79% = €1,685.65 net per month
In practice, the net 39-hour SMIC can therefore be around €1,690 net per month, or slightly more depending on the effect of exemptions applicable to overtime hours.
Comparison with the 35-hour SMIC
Since June 1, 2026, the estimated net 35-hour SMIC is €1,477.93 per month.
An employee working 39 hours at the SMIC can therefore earn around €210 net more per month, depending on their situation and the contribution lines applied on their payslip.
Conversely, a part-time employee does not receive the same amount, as their salary depends directly on the number of hours stated in the contract. To compare different situations, you can also read our calculations dedicated to the 20-hour SMIC and the 30-hour SMIC per week.
This difference shows the concrete impact of overtime on purchasing power: without changing qualification level, an employee can receive a higher salary by moving from 35 to 39 weekly hours.
39-hour SMIC and exemptions
For several years, overtime has benefited from a favorable tax and social contribution regime. The aim is to encourage the use of overtime without increasing the tax burden on employees. For employees working 39 hours per week at the SMIC, this can represent a significant gain in net pay.
Exemption from social security contributions
Overtime hours may benefit from a reduction in certain employee contributions. In practical terms, this means that the net amount received for these hours may be closer to the gross amount shown than for standard working hours.
For example, part of the €266.71 gross in overtime calculated for the 39-hour SMIC may be received with a reduced contribution rate, depending on the rules applied on the payslip.
Income tax exemption
Overtime hours may also be exempt from income tax up to a limit of €7,500 per year. For an employee paid at the 39-hour SMIC, the annual pay related to overtime should generally remain below this threshold.
This means that these hours can improve the real net salary received, especially for employees who are taxable.
A concrete advantage for the 39-hour SMIC
In practice, thanks to these exemptions, the net 39-hour SMIC may be slightly higher than an estimate obtained by simply applying an average contribution rate.
In other words, working 39 hours at the SMIC does not only result in a higher gross salary. The employee also benefits from more favorable tax and social treatment on the portion corresponding to overtime hours.
39-hour SMIC and collective agreements: which jobs are concerned?
Working 39 hours is not specific to one sector. It is mainly found in activities where work organization varies depending on the season, periods of high demand or extended opening hours.
Some common examples, to be checked company by company:
- Hotels and restaurants: wide working hours, split shifts, weekends. Depending on the applicable agreement, hours beyond 35 hours may be paid at an increased rate or compensated with time off.
- Retail and large-scale distribution: late openings, Sundays, inventories. Agreements may provide for regulated overtime and sometimes schedule-related bonuses.
- Private security and guarding: 3-shift patterns, nights and weekends. Collective agreements define increases, rest periods and compensation.
- Cleaning and multiservices: sites operating early in the morning or late in the evening. Some organizations provide for 39 hours with overtime pay or compensatory rest.
- Construction and maintenance: sites with deadline constraints and travel. Hours beyond 35 are often paid at an increased rate and sometimes come with compensatory rest.
- Transport and logistics: planning and delivery constraints. Agreements set specific rules on limits, rest and pay increases.
- Tourism and events: strong seasonality, with frequent use of overtime, RTT or working-time modulation depending on the applicable agreement.
What changes depending on your collective agreement
Each collective agreement can adjust the rules applicable to overtime. This is why it is important to check the IDCC shown on your payslip, as well as any company-level agreement.
Several elements may vary:
- the overtime increase rate;
- the possibility of replacing payment with compensatory rest;
- the annual overtime quota;
- working-time organization: paid 39 hours, 39 hours with RTT, modulation or annualization;
- bonuses linked to working hours: night work, Sundays, public holidays, meal or transport allowances;
- specific rules in the event of night work.
Two companies in the same sector may therefore apply different rules. The key is to compare your payslip, employment contract, collective agreement and any company agreements that may apply.
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