What Is the Difference Between CIR and CII? Which One Should You Choose for Your Company in 2026?

You are investing in R&D. You have heard about the CIR (Crédit d’Impôt Recherche – Research Tax Credit)... but also about the CII (Crédit d’Impôt Innovation – Innovation Tax Credit).

The two incentives look similar. But they do not fund the same thing.

So what is the difference between CIR and CII? And more importantly: which one is truly suited to your company?

Here is a clear comparison to help you decide in 2026.

The CIR: funding research and development

The CIR (Research Tax Credit) covers research and development work.

It applies when your project:

• Involves scientific or technical uncertainty
• Requires experimental work
• Aims to overcome a technological barrier
• Goes beyond the scope of standard development

The CIR rate is generally 30% of eligible expenses.

It funds in particular:

• R&D team salaries (engineers, PhDs...)
• Depreciation of scientific equipment
• Accredited subcontracting
• Patent costs
• The benchmark is the scientific state of the art

The CIR is intended for companies conducting genuine structured research.

The CII: funding product innovation for SMEs

The CII (Innovation Tax Credit) is reserved for SMEs as defined by European standards.

It covers expenses related to designing prototypes or pilot installations for new products.

The CII applies when your project:

• Focuses on a new product
• Delivers superior performance
• Differs significantly from what currently exists on the market
• Does not necessarily involve a deep scientific barrier
• The benchmark is the state of the market

The CII rate is 20% of eligible expenses, capped at €400,000 in expenses per year, i.e., a maximum CII of €80,000.

It primarily funds:

• Personnel costs allocated to design
• Depreciation allowances
• Certain subcontracting expenses

The CII is often more accessible for incremental innovation projects.

The central difference: scientific research or product innovation?

The distinction hinges on the nature of the project.

The CIR funds the resolution of a scientific or technical uncertainty. The CII funds the significant improvement of an existing product.

In other words:

• CIR → overcoming a scientific barrier
• CII → product novelty for the market

Confusing the two can weaken your filing. Conversely, properly distinguishing between CII and CIR is recommended for SMEs and can reassure auditors.

Can you combine CIR and CII?

Yes, under certain conditions, since the CII is exclusively reserved for SMEs.

A company can benefit from:

• The CIR for its research work
• The CII for the prototype development phase

Provided that expenses are not counted twice.

The allocation of projects and costs must be rigorous.

Which incentive should you choose for your company?

The question is not “which incentive is most advantageous?” But “which incentive actually matches your projects?”

Are you a deep-tech startup with complex scientific work? The CIR will likely be central.

Are you an industrial SME improving its products? The CII may be more suitable.

In some cases, both can coexist.

The analysis must be technical before it is fiscal. Our expert teams are at your service to provide precise guidance on both mechanisms.

The common mistakes we observe

Among innovative companies, we observe:

• Confusion between marketing innovation and technical innovation
• An overly ambitious CIR qualification
• Underuse of the CII due to lack of awareness
• Poor allocation of expenses

Result: weakened filings or incentives left unactivated.

Our approach at Fifty Bees

At Fifty Bees, we analyze your projects through a dual lens:

• Scientific
• Financial

We help you to:

• Properly qualify your work
• Identify the appropriate incentive (CIR, CII, or a combination)
• Build a robust filing
• Secure the declaration

Goal: fund your innovation without exposing your company to unnecessary tax risk.

Unsure whether to choose CIR or CII?

A discussion allows you to:

• Assess the true nature of your projects
• Identify the relevant incentive
• Estimate the financial potential
• Secure your approach

CIR and CII are powerful levers. But their effectiveness depends on precise qualification.

Let’s talk to structure your innovation funding strategy.