France Activates Three-Year C3IV Tax Credit Extension For Green Manufacturing Investment

The official trigger is the publication of Decree No. 2026-763 on 11 August 2026, followed by an implementing order on 12 August that updates the list of eligible activities. The decree gives legal effect to the three-year extension, while the order makes the revised eligibility framework operational.

What Has Changed

Before this implementation, the extension had been legislated but still required secondary measures to activate the revised framework. The decree confirms that the relevant extension provisions take effect from 27 May 2026. The companion order entered into force on 13 August, the day after its publication.

The result is a longer application horizon for qualifying investments, with approval applications available through 2028. This is not an automatic tax entitlement. A business must obtain prior approval for its investment plan before beginning the relevant work.

Which Projects Are Covered

C3IV supports industrial and commercial businesses investing in French production capacity connected with batteries, solar panels, wind turbines and heat pumps. The framework also reaches specified components, recycling activities and the processing or recovery of critical raw materials used in those value chains.

The investment must create qualifying productive capacity rather than simply replace existing assets. Businesses should therefore separate expansion, conversion and new-production expenditure from routine maintenance or like-for-like replacement.

C3IV normally equals 15% of eligible expenditure, rising to 20% in Article 107(3)(c) assisted areas and 35% in Article 107(3)(a) areas. Medium-sized businesses receive a 10-percentage-point uplift and small businesses a 20-point uplift.

The project cap is €150 million, increasing to €200 million in Article 107(3)(c) areas and €350 million in Article 107(3)(a) areas. Total public support for the investment may not exceed 75% of eligible costs.

Why The Detail Matters

The practical opportunity extends beyond headline equipment manufacturers. Component producers, recyclers and critical-material processors may also qualify where their activities sit within the official eligibility list.

Suppliers planning a French expansion should map the exact activity, project location and expenditure profile before relying on the incentive in an investment decision. The location can change both the aid intensity and cap, while business size can add 10 or 20 percentage points to the base rate.

The credit therefore sits at the intersection of state aid, project design and sustainability. An eligible technology alone does not establish that every associated asset or cost qualifies.

What Companies Should Do

Potential applicants should check the revised eligibility order, identify the legal entity making the investment and confirm whether any project work has already started. They should also model the interaction between C3IV and other public funding to avoid exceeding the aid ceiling.

Businesses should preserve evidence supporting eligible costs, technology scope, location and anticipated production activity. Early engagement is important because approval must precede project commencement.

Project teams should also distinguish qualifying new productive capacity from replacement investment. A documented eligibility review before procurement or construction begins can prevent a commercial forecast from relying on support that the project cannot claim.