Choosing the right collective agreement (IDCC): payroll impact in France

The collective bargaining agreement (convention collective) is one of the most consulted documents in a French social file — and one of the most frequently misapplied. Many companies inherit an IDCC code written into an old template contract and never check whether it still matches their actual business activity. The result: wrong minimum wages, incorrect job classifications, forgotten bonuses, and back-pay exposure quietly accumulating over three years.

This article sets out the method for identifying the applicable agreement, understanding its IDCC code, and measuring its line-by-line impact on the French payslip. It complements, without repeating, our article on the fundamentals of the collective agreement, which covers definitions and general obligations — here the focus is operational.

The applicable collective agreement depends on the main activity actually carried out (Article L2261-2 of the French Labour Code), not on the activity code assigned by the national statistics office (Insee). It is identified by its four-digit IDCC code, searched on the official labour-law tool or Légifrance. It sets minimum wages at least equal to the national minimum wage (€1,867.02 gross monthly from 1 June 2026), job classifications and sometimes bonuses, and must be stated on the payslip (Article R3243-1). A wrong agreement leads to back pay, time-barred after three years.

The legal answer is straightforward: it is the main activity actually carried out that governs, under Article L2261-2 of the Labour Code. Not the company's corporate name, not the activity code, not a clause in a template employment contract recycled from another business.

In practice, the main activity is the one generating most of the revenue — or, where revenue alone does not resolve the question, the one employing the largest share of staff. A group with several distinct activities may see each establishment fall under a different agreement, provided the activities are genuinely separate and properly documented.

The search follows three steps:

1. Precisely describe the main activity — not the general corporate purpose, but what the company actually does day to day.
2. Search for the agreement on the official labour-law tool (code.travail.gouv.fr) or on Légifrance (IDCC list).
3. Read the scope article of the agreement identified to confirm it covers your activity, geographic area and staff categories.

Where doubt persists between two agreements, case law and social doctrine point towards the branch whose activity most closely matches. Document the choice: a note in the permanent social file, with the texts consulted and the date, is your best protection in a social inspection or an Urssaf audit.

The IDCC (Identifiant de la Convention Collective) is a four-digit code assigned by the French Ministry of Labour to each extended branch agreement. It identifies an agreement unambiguously, regardless of how its title may have changed through successive amendments.

The IDCC serves three concrete purposes: locating the text on Légifrance, configuring payroll software (in Silae, it triggers automatic loading of the branch pay scales), and populating the mandatory monthly DSN social declaration. For software setup, see how to configure the agreement in Silae.

Note that the IDCC is distinct from the brochure number (Journal Officiel publication reference) and from the agreement's own numbering. The IDCC is what counts for the DSN and for controls.

This is the most common confusion in the payroll files we review.

The activity code is an indication, not proof. A full-service restaurant may have received the APE code 56.10A (traditional restaurants) while generating 80% of its revenue from takeaway: its actual main activity points towards the fast-food agreement (IDCC 1501) rather than hotels-cafés-restaurants (IDCC 1979). The distinction matters: pay scales, break allowances, meal indemnities and health cover schemes differ between the two.

In short: the activity code describes the business for tax and statistical purposes; the IDCC translates that activity into enforceable rights and obligations towards employees.

The agreement affects several payslip items, sometimes significantly.

Minimum wages by classification#

Each agreement sets a pay grid by level or coefficient. The coefficient minimum is an absolute floor: it cannot fall below the national minimum wage (€1,867.02 gross monthly from 1 June 2026), but it may exceed it.

Worked example. A fast-food company (IDCC 1501) employs a level-I, step-2 team member. If the branch grid sets a minimum of €1,920 gross for that coefficient and the employer applies the national minimum at €1,867.02, the gap is €52.98 per month — nearly €636 per year per employee. For ten employees at this level, that is over €6,350 in annual back-pay exposure, recoupable over three years (Article L3245-1), meaning a potential liability of about €19,000. This is the type of anomaly our acquisition audits surface.

Job classification and coefficient#

The branch classification determines the level or coefficient assigned to an employee. It depends not only on qualifications but on actual responsibilities and experience required. An under-classification creates employment tribunal risk; an over-classification creates unjustified cost.

Compulsory bonuses#

Some bonuses are mandatory as soon as the agreement provides for them: seniority bonus, thirteenth month, holiday bonus, meal allowance, split-shift premium in HCR. They are not optional additions — the agreement makes them automatic once the conditions are met.

Notice periods, leave and working time#

The agreement may set notice periods exceeding those in the Labour Code, additional holiday entitlements, specific working-time annualisation thresholds, or sector-specific working-time equivalence regimes.

Welfare and health cover#

Many branch agreements impose a specific welfare scheme (prévoyance) with minimum contribution levels and guaranteed benefits. Membership in the branch-designated institution may be compulsory. Failing to apply these guarantees exposes the company to Urssaf reassessments on unpaid contributions.

This is a common situation for mixed-activity businesses — a trader who both sells and installs, or a service firm combining consulting and trading.

The default rule: the main activity's agreement applies to all employees, regardless of individual function. An accountant employed by an industrial company falls under the metalwork or industry agreement, not the accounting firms' agreement.

Two documented exceptions exist:

• Distinct establishments: where geographically and functionally separate sites carry out different activities, each may fall under its own agreement, provided this is documented in the records and applied consistently in payroll and the DSN.
• Agreement imposed by a collective company agreement: if a company-level agreement expressly provides for the application of a specific convention, that provision binds the employer even if it is not the main branch convention. Be alert to the implications if the company's activity subsequently changes.

Where sustained doubt remains, the labour inspectorate or the regional directorate (DREETS) can provide an official position to file.

The September 2017 Macron ordinances restructured the hierarchy of French labour law. Since their entry into force, a company-level agreement may derogate from the branch convention — including unfavourably for employees — across a defined list of topics (working time, variable pay, bonuses, organisational arrangements and others).

This does not mean a company agreement overrides everything. The law draws three blocks:

• Block 1 (absolute public order): the branch convention always prevails — in particular on minimum wages, job classifications, compulsory health cover and welfare.
• Block 2 (supplementary): the branch convention applies unless a company agreement provides otherwise.
• Block 3 (company agreement primacy): the company agreement prevails over the branch for topics expressly authorised (working time, non-compulsory bonuses, etc.).

For payroll in practice: branch minimum wages and job classifications remain non-negotiable floors that no company agreement can undercut. A thirteenth-month bonus provided by the convention may, however, be replaced by an equivalent company-level bonus if a properly negotiated company agreement so provides. For the interplay between the convention and monthly pay variables, see our article on managing monthly payroll variables.

Article R3243-1 of the Labour Code requires the payslip to state the applicable branch collective agreement. In practice:

• Use the official, complete title — not an in-house abbreviation.
• Add the IDCC code to facilitate controls and the DSN.
• The mention must appear on every payslip, including those for part-time staff, fixed-term contracts and apprentices.
• It is reproduced identically in the DSN social declaration under the collective agreement block.

A missing, overly abbreviated or inaccurate convention mention is an irregularity that can be raised in an Urssaf audit or in employment tribunal proceedings. For a full breakdown of French payslip mandatory items, see our article on understanding a French payslip.

When setting up payroll for a first hire, confirming the IDCC is one of the first settings to lock in before the first bulletin.

In a recent file, a restaurant chain with four establishments was applying the HCR agreement (IDCC 1979) across all sites. Three operated on a 100% takeaway model with an average ticket below ten euros and no table service: the main activity corresponded to fast-food (IDCC 1501). The fourth, with table service and a full menu, rightly fell under IDCC 1979.

The distinction was not symbolic: pay-scale minimums, split-shift premiums and the applicable welfare regime differ between the two conventions. After rectification, the three concerned establishments had their payroll adjusted and their DSN corrected. The compliance work took roughly two weeks — far less time than managing an employment tribunal claim.

• Pay-scale uplifts: branches regularly negotiate amendments raising their minimums. Following the national minimum wage increase on 1 June 2026 (€1,867.02 gross), several branches have negotiated or will negotiate corrective amendments. Check your branch grid after every minimum-wage revision.
• Branch mergers: since 2017 the French Labour Ministry has been reducing the number of branches. Several conventions have been merged and more mergers are underway. Verify your IDCC has not been absorbed into a merged convention.
• Convention named in the employment contract: if the contract names a specific convention, the employer is bound by that mention even if it is incorrect. Prefer wording referring to "the collective agreement applicable to the activity carried out" — this is more flexible if the business evolves.
• Outsourced payroll: if payroll is handled by a provider or your accountant, ensure the IDCC transmitted is correct. A wrong IDCC loaded into the payroll software produces non-compliant payslips from day one.

For companies looking to secure their entire social function — IDCC, pay scales, DSN, welfare obligations — our payroll and social management service covers compliance audits and ongoing convention monitoring.

Up to date as of 2026-06-14. This article is for information only and does not replace personalised advice. For your specific situation, consult a chartered accountant registered with the French Ordre des experts-comptables.