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Maximizing French R&D tax credits: a guide for US parent companies.

France runs one of the most generous R&D incentive programs in the world. The CIR can return 30% of eligible R&D expenses — if you structure your funding right.

March 24, 2026Orbiss & Impulsa

For a US company with a French engineering team, the CIR (Crédit d'Impôt Recherche) is a massive opportunity. Qualifying on paper isn't the main challenge — the problem lies in how US parents fund their subsidiaries.

1. CIR vs. CII: which one applies?

CIR — Crédit d'Impôt Recherche30%Of eligible R&D expenses up to €100M (salaries + operating costs). For fundamental and applied research resolving genuine technical uncertainties.
CII — Crédit d'Impôt Innovation30%Designed for SMEs. Covers costs related to designing prototypes or new products.
Strict eligibility ruleFR onlyOnly work physically performed in France is eligible — no US team or offshore contractors.

2. The funding trap: why money flows matter

This is where most US operators unknowingly lose eligibility. The payment structure from US parent to French subsidiary is the central question during a CIR audit.

In a standard cost-plus arrangement, the parent pays the subsidiary a fee for services. French tax authorities may conclude that the parent is "buying" the research — in which case the subsidiary must deduct those payments from its eligible expenses. In practice, this often zeros out the credit entirely.

To avoid this, consider structuring the funding as an operating subsidy or capital contribution, allowing the French entity to "own" the research expenses. The distinction sounds subtle; the financial difference is immense.

3. Transfer pricing and economic substance

Even with correct funding, authorities run a dual audit: the scientific file and the transfer pricing. They want to see economic substance.

The French subsidiary must demonstrate that it carries the technical and financial risk and has genuine decision-making authority over the project. If your intercompany agreement automatically transfers all IP to the US parent, authorities may argue that the subsidiary is merely a service provider — and the CIR does not apply.

4. What to do before tax season

  1. Review intercompany agreements. The French entity must not be positioned as a no-risk service provider. It must retain meaningful control over the research and IP during the eligible period.
  2. Build documentation early. CIR requires a technical "Scientific File" and a "Financial File." They are far harder to reconstruct after an audit has begun.
  3. Check the US side. The French CIR and US R&D credit (Section 41) are not mutually exclusive. Both can run alongside each other if they cover distinct activities.

Conclusion: turn research into a material return

The CIR is one of the most valuable incentives for technical work in France. US companies often miss out because their funding structure disqualifies them before the work even begins. Fix your intercompany agreements, document your substance, and the credit becomes a reliable return on your French R&D investment.

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