The Crédit d’Impôt Recherche (CIR) is France’s flagship R&D tax credit — and one of the most generous in the world. At 30% of qualifying R&D expenditure (up to €100 million), it costs the French state approximately €7 billion per year and benefits nearly 29,000 companies. For any company doing genuine R&D in France — whether a domestic startup, a multinational subsidiary, or a France 2030 grant recipient — the CIR is non-negotiable: it is free money on the table.

This guide provides the complete technical and practical picture: what qualifies, how to calculate, how to claim, audit risks, and the critical interaction with France 2030 funding.

What the CIR Is

The CIR was created in 1983 and reformed substantially in 2008 under President Sarkozy’s economic competitiveness agenda. The 2008 reform transformed it from a marginal incentive into a cornerstone of French industrial policy by raising the rate to 30% (from 10-15%) and removing the reference-year calculation that had made it volatile. Since 2008, the CIR’s 30% rate has been stable through multiple governments — a rare example of French fiscal continuity.

Core parameters (as of 2026):

• Rate: 30% of qualifying expenditure up to €100 million; 5% above €100 million
• Cash refund: Excess credit over tax liability is refunded (not just carried forward)
• Immediate refund for: newly created companies (first 5 years), JEI companies, companies under conciliation or safeguard proceedings
• Carry-forward: Companies not qualifying for immediate refund carry the credit forward 3 years, then receive cash refund

The refund mechanism is critical: The CIR is not simply a tax deduction. It is a credit — first applied against corporate income tax owed, then refunded as cash if there is excess. A pre-revenue startup spending €2 million on R&D receives a CIR credit of €600,000. If it owes zero corporate tax (because it has no profit), it receives €600,000 in cash. This cash-refund structure makes the CIR as valuable for unprofitable deeptech companies as for profitable multinationals.

Qualifying Expenditure Categories

French tax code (Article 244 quater B of the Code Général des Impôts) defines six categories of qualifying CIR expenditure:

1. Personnel Costs

The largest and most important category. Qualifying personnel are:

• Researchers (chercheurs): Holders of a PhD or equivalent qualification conducting original research. Also includes researcher assistants (techniciens de recherche) directly assigned to R&D.
• No specific education requirement for technicians if their activities are exclusively R&D support

Cost calculation: Take the gross salary (salaire brut), add employer social charges at the actual rate (typically 40-45% for cadres), add any applicable bonuses directly related to R&D activity. The total “coût chargé” is the qualifying cost.

Young doctor bonus: For the first 24 months of employment of a newly qualified PhD (thesis defended within 12 months of hiring), the salary cost is doubled for CIR purposes. This is a powerful incentive to hire recent PhDs — effectively making the government pay for their first two years.

2. Equipment Depreciation (Dotations aux amortissements)

Depreciation charges on tangible assets used exclusively for R&D are fully qualifying. “Exclusively” is interpreted strictly by auditors — equipment that serves both production and R&D must be prorated.

Qualifying assets: Laboratory equipment, scientific instruments, dedicated R&D computers, pilot-scale manufacturing equipment used for prototype development.

Calculation: The annual depreciation charge (per the company’s accounting depreciation schedule) is the qualifying amount. A €1 million mass spectrometer depreciated over 5 years contributes €200,000 per year to the CIR base.

3. Third-Party R&D (Sous-traitance)

Payments to approved research organizations for R&D conducted on behalf of the company qualify at 200% of invoice value (up to €10 million of invoiced amount, i.e., generating €20 million of CIR base). Above €10 million of invoicing, the rate drops to 100%.

Approved organizations include:

• CNRS, CEA, INRIA, INSERM, IFREMER, CNES, ONERA, and all other French public research institutions
• French universities and grandes écoles
• Innovation intermediaries accredited by the Ministry of Research
• Foreign organizations in EU/EEA member states (at 100%, not 200%)

Critical rule: The subcontracting organization cannot be a related party (affiliated company). R&D contracted between parent companies and subsidiaries does not qualify. The 200% rate is specifically designed to encourage academic-industry partnership.

4. Patent-Related Costs

Qualifying patent expenses:

• Filing fees (national, European, PCT applications)
• Prosecution costs (attorney fees, translation costs) during patent application phase
• Annual maintenance fees on granted patents
• Opposition defense costs
• Does not include: patent acquisition costs, patent license fees, trademark registration

5. Technology Watch (Veille Technologique)

Up to €60,000 per year of documented expenditure on technology intelligence: journal subscriptions, database access (Derwent Innovation, SciFinder), attendance at specialized scientific conferences, and licensed technology databases.

This cap is generous for most SMEs but limiting for large R&D organizations. The €60,000 cap applies per company, not per project.

6. Standardization Expenses

Participation in standardization work (ISO committees, AFNOR working groups, IEC technical committees) where the company’s researchers contribute to developing technical standards related to its R&D activities. Qualifying costs: researcher time on standardization work (at standard personnel cost rates), plus direct fees.

The Calculation in Practice

Example 1: Scale-up biotech startup, €3M R&D spend

This startup spends €3M total, qualifies €2M for CIR (at standard calculation), and receives €612,600 in cash.

Example 2: Large industrial company, €50M R&D spend

At 30% of €50M: €15,000,000 CIR credit. This flows directly to offset corporate income tax, with excess refunded after 3 years. At this scale, CIR is a material factor in investment location decisions.

Example 3: French subsidiary of US company

A US company establishes a French SAS to conduct AI research. 10 engineers (PhD-level, €100K gross + €44K charges = €144K each) = €1.44M salary base. €500K to INRIA for joint research (×200% = €1M base). €200K equipment depreciation. Total CIR base: €2.64M. Credit: €792,000 cash refund, received within 3-6 months of filing.

How to Claim the CIR

Administrative process:

1. At year-end, the company’s accountant or CFO prepares Form 2069-A (Déclaration du crédit d’impôt recherche) detailing qualifying expenses by category.

2. The form is attached to the company’s annual corporate tax return (liasse fiscale), filed with the tax authority (DGFiP) by the applicable deadline (3 months after fiscal year end for standard filers, or May 15 for calendar-year companies).

3. The DGFiP reviews the return. For credits over €100,000, they may request documentation before processing the refund.

4. Cash refunds are transferred to the company’s bank account, typically 3-6 months after filing.

First-time filers: Companies claiming CIR for the first time should retain a French tax counsel with CIR specialization for the first filing. The technical documentation requirements are specific, and first filings attract higher audit risk.

Advance ruling (rescrit fiscal): Companies expecting to claim CIR credits over €2 million annually can request a formal advance ruling from the DGFiP confirming that their specific activities and methodology qualify. The rescrit process takes 6-9 months but provides legal certainty and substantially reduces audit risk for all subsequent filings using the same methodology.

Audit Risk and Documentation

The CIR is one of the most frequently audited tax positions in France. The audit rate for CIR claims increases significantly above €500,000. Common audit triggers:

Scientific audit (expertise technique): The DGFiP can commission an external scientific expert (typically a professor or senior researcher) to assess whether declared activities constitute genuine R&D. Activities most at risk: routine software development, product testing and quality control, process optimization without genuine uncertainty resolution, market research.

Personnel audit: Auditors cross-check declared researcher headcount against social security declarations, employment contracts, and LinkedIn profiles. Researchers who are actually sales engineers, IT support staff, or project managers with no R&D responsibilities are common disqualification targets.

Subcontracting audit: Contracts with non-approved organizations are disqualified. Related-party research contracts are disqualified. Invoices without clear R&D deliverable descriptions are challenged.

Time-sheet documentation: This is the single most common audit failure point. Many companies do not maintain contemporaneous time-sheets for researchers, relying instead on reconstructed allocations. Auditors reject reconstructed time-sheets. Maintain weekly or bi-weekly time-sheets (fiches de temps) for every qualifying employee, archived with project codes.

Mitigation checklist:

• Monthly R&D activity reports for each qualifying project (one paragraph per project on work done, obstacles encountered, open scientific questions)
• Signed time-sheets for each employee, by employee and supervisor
• Technical project descriptions with explicit statement of scientific/technical uncertainty
• Qualification documentation for all declared “researchers” (diplomas, CVs, job descriptions)
• Signed contracts for all subcontracted R&D, with explicit statement of R&D nature and qualifying institution status

CIR + France 2030: The Double Incentive

This is the most important practical interaction for France 2030 grant recipients:

The rule: When a company receives a public subsidy (including France 2030 grants) for specific R&D expenditures, those expenditures must be reduced by the grant amount before calculating the CIR base. The subsidy is “deducted” from the qualifying cost.

The reality: This still leaves a highly advantageous combined incentive. Example:

A company receives a France 2030 I-Démo grant covering 50% of a €4 million R&D project. Grant = €2 million. Remaining qualifying R&D expenditure = €2 million. CIR on remaining = €600,000.

Net effective public contribution to the project: €2M (France 2030 grant) + €600K (CIR) = €2.6M on a €4M project = 65% effective public funding.

This 65% figure is not unusual for France 2030 industrial demonstrator projects when all instruments are stacked. It is a structural feature of French industrial policy design — Bpifrance and the SGPI explicitly design France 2030 competitions with the CIR interaction in mind.

International Comparisons

France’s CIR is among the most competitive R&D tax incentives in the OECD:

France’s 30% rate on total R&D costs (not just wages) with no ceiling and immediate cash refund for startups is structurally superior for deeptech companies with high equipment and subcontracting costs. This is a measurable competitive advantage that explains why biotech and semiconductor R&D migrates to France when companies face location choices.

Frequently Asked Questions

What is the difference between CIR and CII?

The CIR (Crédit d’Impôt Recherche) covers genuine R&D — basic research, applied research, experimental development — at 30%. The CII (Crédit d’Impôt Innovation) covers “innovation activities” for SMEs that fall below the R&D threshold — prototype design, product design, pilot production — at 20%. A company can claim both in the same year for different activities (R&D on CIR, subsequent prototyping on CII), provided no expense is counted twice.

Can a company claim CIR on research conducted by employees working remotely from another country?

No. The CIR applies to R&D conducted in France. Researchers must be employed by a French entity and conducting their work in France. Remote work in another country does not qualify. However, researchers who occasionally travel internationally for conferences, laboratory visits, or collaboration meetings retain their French CIR eligibility — the question is where their primary R&D work is conducted.

Is software development eligible for CIR?

Partially. Software development qualifies if it involves genuine scientific or technical innovation — that is, if the developers are solving problems for which no solution exists in publicly available knowledge. Developing a new machine learning architecture from scratch: likely qualifies. Fine-tuning an existing open-source model: probably does not. Building a CRUD application or internal management tool: does not qualify. The boundary requires case-by-case analysis; companies with significant software R&D should obtain a technical review from CIR-specialized counsel.

How does the CIR interact with the IP Box regime?

They are complementary and sequential. CIR subsidizes the cost of developing IP; the IP Box (10% tax rate on patent income) reduces the tax on income from exploiting that IP. A company that develops patentable technology using CIR-subsidized research, registers patents, and licenses them externally benefits from both: cheaper development costs and preferential taxation of resulting income.

What happens if an audit partially disallows a CIR claim?

Disallowed CIR creates a tax adjustment: the company owes the principal amount of credit claimed plus interest (at the official French adjustment rate, typically 2.4-4.8% annually) plus potentially a penalty (10% for spontaneous correction; 40% for “deliberate omission”; 80% for fraud). Most CIR audits result in partial disallowance with interest but without fraud penalties if the company has made good-faith efforts at documentation. This reinforces the value of advance rulings and robust contemporaneous documentation.

Key Takeaways

• The CIR provides 30% cash credit on all qualifying R&D expenses, with immediate refund for startups — the most generous R&D incentive in the OECD for deeptech-type investments
• Six qualifying categories: personnel (largest), equipment depreciation, third-party R&D (at 200% for public labs), patents, technology watch, and standardization
• When combined with France 2030 grants, total effective public contribution to projects can reach 60-70%
• The cash-refund structure makes CIR equally valuable for pre-revenue startups as for profitable multinationals
• Documentation quality — especially time-sheets and project technical descriptions — is the primary risk-management lever
• France’s CIR costs the state €7 billion/year and is structurally stable across political cycles: cross-party consensus on its economic value protects it from budget cuts

Related Resources

• Tax Incentives for Innovation in France — Complete Guide
• France 2030 for Startups
• France 2030 for Foreign Companies
• French Deep Tech Playbook
• Crédit d’Impôt Recherche — Glossary Entry
• Jeune Entreprise Innovante (JEI)
• Bpifrance Guide for Entrepreneurs