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FranceLégifrance

BTP diesel aid: 20 centimes a litre for September–October

BTP firms using non-road diesel can claim 20 centimes a litre, up to €4,000 a month, for September and October 2026 — file on impots.gouv.fr by 31 October and 30 November.

By Taxxa AI OyPublished 4 October 2026

Public Sector & Economy

Small building and public-works firms running non-road diesel plant get a two-month fuel subsidy.Legifrance Décret n° 2026-921 of 2 October 2026 creates a monthly grant, paid by the direction générale des finances publiquesLegifrance, for September 2026 and October 2026Legifrance, at 20 centimes per litre of gazole non routier invoiced during the month concernedLegifrance, capped at €4,000 per undertaking per monthLegifrance.

Eligibility is cumulativeLegifrance and assessed principally at 31 March 2026Legifrance. The business must be a French tax-resident individual or private-law entityLegifrance exercising an economic activity in the building and public-works sectorLegifrance, with its principal activity in one of the annexed sectors (roads, railways, civil engineering, demolition, earthworks, drilling, masonry, roofing, structural works, equipment hire with operator and similar works) at 31 March 2026Legifrance; operate machinery defined by article 3 of Regulation (EU) 2016/1628Legifrance; have been registered in the national business register with a declared start of activity no later than 31 March 2026Legifrance; not be dissolved or struck off at that dateLegifrance; employ no more than 50 staff under the code de la sécurité sociale counting rulesLegifrance; have annual turnover below €50 million or a balance-sheet total below €43 millionLegifrance, assessed at group level where control links within the meaning of article L. 233-3 of the code de commerce existLegifrance; not be in safeguard, receivership or liquidation proceedingsLegifrance; be current with tax and social filing obligationsLegifrance; and have no unpaid tax or social debts, except debts settled or covered by a respected payment plan by the application date, disregarding tax debts of €1,500 or less in total and debts under unresolved dispute at 31 March 2026Legifrance.

Applications go through impots.gouv.fr on the dedicated formLegifrance: between 1 and 31 October 2026 inclusive for SeptemberLegifrance, and between 2 and 30 November 2026 inclusive for OctoberLegifrance, one application per undertaking per month. Each file carries a sworn statement, the month's diesel purchase invoices entered also in the mandatory summary spreadsheet, the activity sector, bank details, and the de minimis aid received over the rolling three years with a sworn statement that the grant will not breach the Regulation (EU) 2023/2831 ceiling; the DGFiP may request further material within 15 days. The grant counts under the EU de minimis frameworkLegifrance, whose general ceiling stands at €300,000 per undertaking over three rolling fiscal yearsService Public, and may be reduced to respect it.

Where the monthly grant exceeds €600, it must be repaid in full if the gross operating surplus for the fiscal year of award is positive and at least 98% of the prior year's figureLegifrance, calculated after deducting earlier fuel-aid grants listed in the decree; October aid is not deducted when assessing September aid. Supporting documents are set by ministerial order, and undue sums are recovered. Beneficiaries keep eligibility and calculation records for five years, and grants are published on the Aides d'Etat platform within 20 working days.

Legal basis: décret n° 2026-921 du 2 octobre 2026 instituant une aide aux entreprises du secteur du bâtiment et des travaux publics utilisant du gazole non routierLegifrance.

File the September application on impots.gouv.fr by 31 October 2026 and the October application by 30 November 2026, attaching the month's diesel invoices in the mandatory spreadsheet plus the sworn statements and bank details; keep eligibility and calculation records for five years.

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