France’s Constitutional Council has upheld a new tax on capital reductions following the cancellation of shares repurchased by companies from their own shareholders, strengthening the legal position of a 2025 budget measure aimed at large French groups.
France keeps its capital-reduction tax
The French Constitutional Council issued Decision No. 2026-1189 QPC on March 27, 2026, and ruled that the new tax on capital reductions through the cancellation of shares previously repurchased by a company is constitutional. KPMG reported in an April 30, 2026 TaxNewsFlash that the court allowed lawmakers to define the tax base by reference to the amount of the capital reduction and a proportionate share of capital-related premiums, without linking the calculation to the price actually paid for the shares.
The measure applies to companies headquartered in France with annual revenue excluding value-added tax of more than 1 billion euros. French tax authority guidance on Article 235 ter XB of the General Tax Code states that the tax applies to capital reductions carried out from March 1, 2025, where a company previously repurchased its own securities and later cancelled them.
Large French companies face a higher cost
The tax is aimed mainly at large French groups using share buybacks as a capital-management tool. In corporate finance, a share buyback occurs when a company purchases its own shares from the market or from shareholders. The company may hold the shares, use them for compensation plans or cancel them. When shares are cancelled, the number of shares outstanding falls and the ownership share of remaining shareholders increases.
For tax purposes, French authorities treat this type of operation as a use of excess liquidity by large companies. It differs from dividends: dividends distribute profits directly, while buybacks often support the value of remaining shares and give issuers more flexibility. That is why the 2025 budget introduced a specific tax on capital reductions following such transactions.
EY said in its review of the French 2025 Finance Bill that the tax applies to share capital decreases following buyback transactions carried out from March 1, 2025 by companies headquartered in France with revenue above 1 billion euros; the rate is 8%, and the base includes the amount of the capital decrease plus a fraction of share premiums calculated in proportion to the capital reduction.
Why the dispute reached the court
The companies’ challenge focused less on the principle of taxing buybacks and more on the method used to calculate the base. The core argument was that the tax base may not match the economic price of the transaction: the tax is not calculated on the amount actually paid to repurchase shares, but on an accounting measure tied to the reduction of capital and capital-related premiums.
The Constitutional Council rejected that challenge. It held that lawmakers may choose a tax calculation method as long as it is linked to the nature of the taxable transaction and does not create a clear breach of equality before the law or equality before public charges. The court also found that the method reflects the nature and scale of transactions carried out by large enterprises.
The practical result is that large companies can no longer rely on the main constitutional argument to overturn the tax. Questions remain about application, accounting treatment, filing deadlines and the impact on particular transactions, but the legal architecture itself has survived review.
A budget measure with political weight
The buyback tax is part of a broader fiscal reset in France. The 2025 budget was adopted after a long and difficult political process and was designed to contain the public deficit. Le Monde reported that the package included additional taxes on large companies, a higher financial transaction tax, measures affecting high-income households and the share-buyback tax, which authorities expected to raise about 400 million euros in 2025.
For the government, the measure carries both fiscal and political value. It shows that large companies are being asked to contribute to budget consolidation at a time of pressure on public spending and disputes over tax fairness. For business, it reinforces concerns that France’s tax environment has become less predictable and that shareholder-return programs now require more careful legal and tax modeling.
Corporate behavior may shift
The ruling does not prohibit buybacks, but it makes them more expensive for companies within the scope of the tax. Large French groups will now have to include the 8% charge when choosing between dividends, buybacks, debt reduction, investment and cash retention.
The tax may be especially relevant for companies with recurring buyback programs and significant share premiums on their balance sheets. The larger the capital reduction and related share-premium fraction, the larger the base. Since the tax is not directly tied to the market price paid for the shares, advance modeling becomes more important.
For investors, this means French issuers may become more cautious in using buybacks to support shareholder returns. Some companies may shift emphasis toward dividends, special distributions or internal investment, but the choice will depend on capital structure, shareholder tax profiles and sector conditions.
Legal certainty, but higher tax friction
The main result of the ruling is that the contested provision has been stabilized. Before the Constitutional Council’s decision, companies could treat the tax as legally vulnerable, especially on equality grounds. After the decision, risk moves from constitutional litigation to implementation: how to calculate the base, document the link between repurchase and cancellation, treat group structures and plan corporate action calendars.
France is reinforcing a broader trend in which tax policy is moving deeper into the financial engineering of large companies. Share buybacks remain lawful, but they are no longer fiscally neutral. As experts at International Investment report, the critical risk is that the measure may support budget revenue in the short term while reducing the predictability of the tax regime for large corporate headquarters; for investors, the issue is not only the rate, but the signal that capital operations can quickly become targets of new fiscal measures.
FAQ: France’s tax on share buybacks
What did France’s Constitutional Council decide?
It upheld the constitutionality of the new tax on capital reductions following the cancellation of shares that a company had previously repurchased from its own shareholders.
Which companies are affected?
The tax applies to companies headquartered in France with annual revenue excluding value-added tax above 1 billion euros in the last completed financial year.
What is the tax rate?
The rate is 8% of the tax base linked to the capital reduction and a proportionate share of capital-related premiums.
When does the tax apply?
The main regime applies to capital reductions carried out from March 1, 2025.
Why is the tax linked to share buybacks?
When a company repurchases and cancels shares, it reduces the number of shares outstanding and may increase the value or ownership weight of remaining shares. French authorities view this as a form of economic benefit distributed to shareholders.
What does QPC mean in French law?
QPC stands for “priority question of constitutionality.” It is a procedure allowing a party to challenge an existing legal provision if it is alleged to infringe rights and freedoms guaranteed by the Constitution.