Paid Leave: No Cumulation of Conventional Additional Leave and Legal Principal Leave

Imagine the scene: in Caussade, in the Tarn-et-Garonne, Mr. Dupont, a surveyor in a land surveying firm, receives his payslip and notices that his employer has not paid him the allowance for the additional seniority leave that he had been receiving for years. He thought this right was acquired. But his employer cites a recent law. Who is right? This decision of the Court of Cassation of 15 November 1973 answers this crucial question for thousands of employees and employers. And if you own a firm or are an employee, it directly concerns you.

Indeed, the law of 16 May 1969 extended the duration of principal leave for all employees. But what about the additional benefits provided by collective agreements? Can they be added to the new legal leave? The answer is no, as the High Court has ruled.

In this article, we will dissect this decision, understand its reasoning, and see what it means for you, whether you are an employer or employee, in Moissac, Montauban, or elsewhere. Get ready for a journey into the intricacies of labour law, explained simply.

The Facts: A Story Like Any Other

Mr. X is a chartered surveyor, employed in a firm in Caussade. He is governed by the National Collective Agreement for Surveyors, Topographers, Photogrammetrists and Land Experts of 25 March 1964. This agreement provided, in its Article 23, for an annual principal leave of 18 working days (i.e., 3 weeks) for employees with a certain length of service. But note: it also granted additional seniority leave of 2 working days for each five-year period of service in the company. Mr. X, with his 15 years of service, thus benefited from an additional 6 days, bringing his total leave to 24 working days.

But then, in 1969, the legislature intervened. The law of 16 May 1969 changed the rules on principal leave: henceforth, every employee is entitled to a principal leave of 24 working days (i.e., 4 weeks) after one year of service. Mr. X, like all his colleagues, therefore saw his principal leave increase from 18 to 24 days. But he also claimed the retention of his additional seniority leave of 6 days, i.e., a total of 30 days. His employer refused, considering that the new legal leave absorbed the old conventional benefit.

A dispute arose. Mr. X brought the case before the Montauban Employment Tribunal, which ruled in his favour. The employer appealed. The Toulouse Court of Appeal reversed the judgment: according to it, the additional leave was not due because the law had replaced the agreement. Mr. X then appealed to the Court of Cassation. In its judgment of 15 November 1973, the Court of Cassation dismissed his appeal and upheld the employer's position. In other words, no cumulation possible.

This dispute, which began in a small firm in Caussade, thus set a precedent at the national level. It perfectly illustrates the tensions between sources of law: statute and collective agreement.

The Reasoning of the Court — Explained

The Court of Cassation had to answer a simple question: can an employee who, thanks to the law of 16 May 1969, benefits from a longer principal leave than that provided by his collective agreement, also retain the additional seniority leave that the same agreement granted him before the law?

To decide, the judges interpreted the intention of the legislature. The 1969 law aimed to harmonise and extend the duration of principal leave for everyone. It sets a legal minimum of 24 working days. But it does not prohibit collective agreements from providing additional benefits. However, in this case, the additional seniority leave was not independent of the principal leave: it was calculated based on seniority and added to the conventional principal leave of 18 days. Now that this conventional principal leave has been replaced by the legal leave of 24 days, the additional leave no longer had a basis to apply.

In short, the Court considered that the law replaced the agreement on the point of principal leave. Consequently, the additional seniority leave, which was a supplement to the old principal leave, cannot be cumulated with the new legal leave. This would be contrary to the overall scheme of the law, which aimed to set a minimum level of leave, not to allow indefinite cumulation.

Note, however: the Court did not prohibit all conventional additional leave. It simply stated that, in this specific case, the additional leave was absorbed by the new legal leave because it was linked to the principal leave. If the agreement had provided for a completely separate and autonomous seniority leave, the result might have been different. But that was not the case here.

What few people know is that the Court relied on the principle that a new law of public policy (mandatory) prevails over collective agreements, unless those agreements offer more favourable benefits. But here, the conventional benefit was not overall more favourable, because the legal principal leave was already longer than the old conventional principal leave plus the supplement.

What This Changes for You — Practically

This decision has direct implications for employers and employees, particularly in sectors covered by collective agreements providing for seniority leave.

For employees: If your collective agreement provides for additional seniority leave that was added to a principal leave shorter than the current legal leave (24 working days), you cannot claim cumulation. For example, if you work in Moissac in a land surveying firm and your agreement granted you an extra 2 days for every 5-year period, but your principal leave was 18 days, the increase to 24 legal days has absorbed that benefit. You are therefore only entitled to 24 days, unless the agreement provides for a seniority leave completely independent of the principal leave (which is rare).

For employers: You can rest assured: you do not have to cumulate the old conventional benefit with the new legal leave. However, check that your collective agreement has not been modified since 1973 to provide a different mechanism. undefined, I have come across cases where employers had continued to pay the allowance by mistake; they can stop this payment, but beware of more favourable customs or company agreements.

If you are in this situation, you must carefully examine the terms of your collective agreement. Look at whether the additional leave is defined as a supplement to the principal leave or as an autonomous right. When in doubt, consult a lawyer lawyer.

Four Tips to Avoid This Type of Dispute

• Check your up-to-date collective agreement: Do not rely on old practices. The law and agreements evolve. Download the updated text from the Légifrance website or from your trade union.
• Compare leave durations: Do the calculation: legal principal leave (24 working days) vs conventional principal leave + additional leave. If the conventional total is less than or equal to the legal one, the supplement is absorbed.
• Check the autonomy of the seniority leave: If the agreement provides for a seniority leave that adds to the legal leave, independently of the old principal leave, it may be retained. But this is the exception.
• In case of dispute, prefer negotiation: Before going to the employment tribunal, try to reach an amicable agreement. A lawyer can help you assess your rights and find a solution.

Further Analysis: Related Case Law and Developments

This 1973 decision is part of a series of Court of Cassation judgments limiting the cumulation of conventional benefits with new, more favourable legal provisions. For example, in a judgment of 20 June 1973 (no. 72-40.123), the Court had already ruled that the additional leave for split holidays could not be cumulated with a principal leave extended by law. The trend is therefore consistent: the new law replaces the agreement on the point it regulates, unless the agreement offers a distinct and autonomous benefit.

More recently, case law has evolved on other aspects of leave, but the principle of non-cumulation remains. For instance, for seniority leave provided for by company agreements, the courts examine whether they constitute an acquired benefit or are absorbed by the law. In practice, it is rare for a seniority leave to survive an increase in the legal leave.

What this means for the future: if the legislature were to extend the principal leave further tomorrow, the same rules would apply. Employers must therefore be vigilant with each reform.

Frequently Asked Questions

My employer was paying me an allowance for additional seniority leave. Can he stop overnight?
Yes, if this leave was linked to an old conventional principal leave now replaced by law. But he must inform you and give reasonable notice. When in doubt, consult a lawyer.

What if my collective agreement still provides for this additional leave?
The agreement must be interpreted in light of this case law. If it has not been amended, it is deemed obsolete on this point. You can request an update from your employer or your union.

Can I claim back payments if my employer stopped paying the allowance?
No, because the Court of Cassation's decision validated the employer's refusal. You cannot claim amounts for the period after the 1969 law came into force.

What are the time limits for challenging a refusal of additional leave?
You have up to 3 years from the date you became aware of your right. But it is better to act quickly.

Does this decision apply to all collective agreements?
Yes, the principle is general, but each agreement must be examined on a case-by-case basis. Some agreements provide specific mechanisms that might be retained.

Are you in a similar situation? A first 30-minute consultation with Maître Zakine (€45) can save you months of proceedings — and often much more. Book an appointment →