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French innovation tax credit after an acquisition: establish eligibility before valuing the benefit
The French crédit d’impôt innovation (CII) is a French tax measure for qualifying SMEs. It is distinct from the research tax credit and from innovation incentives in other countries. An acquisition analysis must identify the taxpayer, the tax year, the activities and the applicable jurisdiction before estimating a benefit.
Separate the statutory rules from deal assumptions
For qualifying expenses under the ordinary French rate, the tax authority states a 20% rate from 16 February 2025 and an annual eligible-expense ceiling of €400,000. The CII is not a credit calculated on €100 million of innovation expenses. The applicable period, location and any special rate must be checked against the official rules for the expenditure concerned.
The statutory framework is article 244 quater B, II-k, of the French tax code. The current official guidance covers qualifying expenditure through 31 December 2027. These parameters do not establish that a particular company’s projects or costs qualify.
Review SME status using the actual ownership structure
Document the target’s employees, turnover, balance sheet and ownership links before and after the transaction. Use the European SME definition and the aggregation rules for partner and linked enterprises. A percentage of ownership alone is insufficient to conclude that eligibility is automatically lost. Identify relevant investors, group relationships and the assessment date with the tax adviser.
Build a transaction evidence file
- Map the legal entity claiming the credit and distinguish a share acquisition from an asset transfer or merger.
- List the relevant prototypes or pilot installations, their technical justification, expenditure dates and supporting invoices.
- Reconcile payroll, subcontracting and other claimed expenses with the applicable eligible categories.
- Review prior declarations, tax authority correspondence and uncertainty with the company’s adviser.
- Separate historic liabilities from future eligibility and document how the transaction changes each analysis.
A deal does not justify a blanket statement that the company must reapply after every legal-form change or that a generic de minimis threshold determines every CII claim. Test the rule applicable to the actual transaction rather than inserting an automatic loss assumption into the valuation.
Use the findings in negotiation
Record unresolved issues in the due diligence report. Allocate responsibility for declarations, supporting documents and historic exposures in the acquisition documentation. Any indemnity or condition should reflect the identified risk; neither its amount nor its duration can be inferred from a generic article.
Capinext can help advisers structure an evidence file. The eligibility decision remains grounded in the applicable law, the company’s records and professional analysis.
Editorial review: 5 October 2026. #capinext
Sources: Administration fiscale française; BOFiP — PME et champ du CII; BOFiP — régime français.