Construction accountant in France: 2026 guide

Construction accountant in France: 2026 guide#

Construction accounting in France must follow the site, not only the invoice. Progress billing, reverse-charge VAT, subcontractors, retention money, payroll, material purchases and payment delays can create a very different picture from the annual profit and loss statement.

This guide is for building contractors, construction SMEs, specialist trades, engineering offices and project managers. It connects with our French pages for BTP and construction accounting, building accountants and outsourced CFO support.

The key accounting risks are VAT, contracts, site margin and cash. A construction company may be profitable on paper while cash is trapped in payment delays, retention money or poorly controlled subcontracting.

French tax rules provide a reverse-charge mechanism for certain construction works performed through subcontracting. When applicable, the subcontractor invoices without VAT and the customer accounts for VAT under the reverse-charge mechanism. The mechanism should never be applied automatically. The contract, the role of each party and the nature of the work must be checked first.

For relevant private works contracts, French law allows retention money up to 5% of progress payments to secure completion and reservations at reception. Accounting should track it as a receivable, not as a discount.

Example: if a progress invoice is 80,000 euros excluding VAT and the contract includes 5% retention, 4,000 euros is not collected immediately. Across several sites, this can materially reduce cash even when revenue has been booked.

Before paying a subcontractor, the company should keep a clear contract, description of works, price, payment milestones, insurance evidence, relevant certificates and VAT treatment.

Site margin should compare budget, committed purchases, internal hours, subcontracting, billed progress and remaining work. Global company margin is not enough because one late or badly priced site can absorb the profit of several good projects.

French e-invoicing requires all businesses to receive e-invoices from 1 September 2026. Construction companies must pay particular attention to progress invoices, purchase orders, deposits, retention money and reverse-charge wording. See our e-invoicing guide.

In construction, the underestimated risk is the gap between the quoted margin and the margin at completion. A site may be profitable on paper and lose margin through unallocated purchases, poorly tracked labour, penalties, rework, late billing or retention money forgotten in the cash forecast.

• BOFiP: reverse-charge VAT for construction subcontracting.
• Légifrance: retention money rules for works contracts.
• economie.gouv.fr: e-invoicing timetable.
• impots.gouv.fr: VAT regimes.