French VAT Reverse Charge in 2026: Mechanism, Cases and CA3 Filing

Written by Samuel HAYOT, chartered accountant (expert-comptable).

A single incorrectly completed CA3 line is expensive: the omitted tax is reassessed, a 5% fine on the deductible amount applies (art. 1788 A, 4 of the French Tax Code) and late interest runs over the whole unbarred period. This guide sets out the mechanism, the statutory cases, the CA3 line to use in each of them, the wording required on the invoice and the 2026 watchpoints.

Reverse charge shifts the VAT declaration from the supplier to the customer, on the customer's own CA3 return. Four common cases: imports (line A4), intra-EU acquisitions of goods (line B2), purchases of services from a provider not established in France (line A3) and subcontracted construction works (line A2). The supplier's invoice is issued without VAT and carries the wording « Autoliquidation ».

To apply reverse charge is to self-assess, as customer or importer, the VAT that would normally be due by your supplier or service provider. The VAT amount is not invoiced by the seller: it is declared directly by the buyer on their CA3 return, both as output VAT (on the taxable base line) and, where the conditions are met, as input VAT (on the deduction line).

The mechanism does not eliminate the tax burden — it shifts who is responsible for declaring it. The State loses nothing: it is the French VAT-registered customer who becomes liable for the tax in place of the supplier.

Why Does This Mechanism Exist?#

Reverse charge serves two distinct objectives:

• Combating fraud: in construction subcontracting and certain transactions, unscrupulous suppliers would invoice VAT without remitting it to the State. Making the customer liable removes that risk.
• Simplifying cash flow: for imports, businesses no longer need to advance customs VAT and then recover it. Since 1 January 2022, import reverse charge has been automatic and universal.

The table below lists the main situations under French law in 2026.

Our read: two cases account for most of what an SME will meet, import reverse charge and subcontracted construction works. Purchases of services from a foreign provider come next, mainly for companies subscribing to software or consulting outside France.

Reverse charge is not optional where statute provides for it. It is mandatory whenever three conditions are all met:

1. The transaction is subject to French VAT.
2. The supplier or service provider is not established in France (or, in the construction context, is a subcontractor within the meaning of the 1975 subcontracting act).
3. The customer is VAT-registered in France and identified under a valid intra-EU VAT number.

If any one of those conditions is absent, reverse charge does not apply. A private individual or a non-taxable entity cannot apply reverse charge: the foreign provider must register for French VAT and collect the tax directly.

The Special Case of Construction Subcontracting#

Article 283-2 nonies CGI sets out a specific rule for real estate works carried out under subcontracting arrangements. The subcontractor invoices without VAT and adds the wording "Autoliquidation", required by article 242 nonies A, I, 13° of annex II to the French Tax Code whenever the customer is the person liable for the tax. The main contractor declares that VAT on its CA3, line A2.

What exact wording goes on the invoice? The only compulsory word is "Autoliquidation". Adding the legal basis is not required, but it removes any ambiguity for the customer and for an inspector: "Autoliquidation, art. 283-2 nonies du CGI" for subcontracted construction works, "Autoliquidation, art. 283-2 du CGI" for services bought from a provider not established in France, "Autoliquidation, art. 196 of Directive 2006/112/EC" for intra-EU B2B. Conversely, a subcontracting invoice showing VAT on a transaction that falls under reverse charge is irregular, and VAT charged in error is not deductible by the recipient.

The main contractor then declares the VAT on their CA3. The absence of this wording exposes the subcontractor to a reassessment risk, and the main contractor to a refusal of deduction if the invoice is inconsistent with the accounting treatment.

The CA3 return has several distinct lines depending on the type of reverse charge. Confusing these lines is one of the most frequent errors.

Warning: output VAT and input VAT must both appear on the same CA3 for the same period. Allocating them across two different returns creates a gap that may be interpreted as a tax-avoidance attempt during a tax inspection.

Steps to Follow for Each Transaction#

1. Identify the type of reverse charge and the applicable legal basis.
2. Calculate the taxable base in euros (for imports: include transport, insurance and ancillary costs).
3. Verify the applicable VAT rate (20%, 10% or 5.5% depending on the nature of the goods or services — see our guide on different VAT rates on an invoice).
4. Cross-reference the source document (customs declaration, ex-VAT invoice, contract).
5. Report the output VAT on the correct CA3 line.
6. Report the same amount as input VAT on line 20 if the right to deduct has been established.
7. Retain the complete audit trail (invoice + customs document + accounting entry + CA3 return).

Reverse charge produces two mirror accounting entries. The simplified template below is for an import of goods at €10,000 excluding VAT, with VAT at 20%.

Worked example — Import of €10,000 ex-VAT, VAT at 20%

The €2,000 of VAT appears simultaneously as output (44571) and as input (44566). For a business recovering 100% of its VAT, the net cash impact is zero. But the entry must appear in both directions without exception.

In practice: the classic error is to book the deduction without passing the output VAT entry. It creates a fictitious cash-flow benefit that a tax inspection reverses, and it triggers precisely the 5% fine of article 1788 A, 4 of the French Tax Code.

Certain sectors are structurally affected by VAT reverse charge because of their operating model.

Construction and property development: subcontracting is near-universal. A developer coordinating five subcontracted trades must manage five separate reverse charges, each with its own set of ex-VAT invoices to verify.

Import and international trade: any goods imported from outside the EU trigger a reverse charge on the CA3. Businesses importing from China, the United States or Turkey face this on every delivery.

SaaS and B2B digital services: a French company subscribing to a US software platform or an off-EU cloud service will receive an invoice with no French VAT. The company must self-assess the VAT. Many SMEs are still unaware of this obligation.

Energy and wholesale markets: companies purchasing electricity or gas directly on wholesale markets are subject to reverse charge under article 283-2 quinquies CGI; transfers of emission allowances fall under 283-2 septies.

Illustrative scenario: an industrial SME regularly imports components from outside the EU and its accountant processes those imports as ordinary supplier invoices, with nothing entered on line A4. Over the audited years the omitted tax is reassessed, the 5% fine on the deductible amount applies and late interest runs from each due date. The right to deduct itself survives, provided the substantive conditions are met: what is sanctioned is the failure to declare, not the deduction.

Reverse charge is a statutory obligation. Failure to comply correctly exposes the business to several cumulative sanctions.

• Reassessment of the omitted tax: undeclared VAT is reassessed. Where the right to deduct is complete, that reassessment is offset by the matching deduction and the sanction specific to a reverse charge failure remains the fine below.
• 5% fine on the deductible amount (Art. 1788 A, 4 CGI) where the taxpayer was entitled to deduct the tax it failed to report on its CA3. The Constitutional Council held it compliant with the Constitution (decision no. 2022-1009 QPC of 22 September 2022).
• Interest at 0.20% per month (2.4% per annum) on the VAT reassessed.
• 40% penalty for deliberate non-compliance (Art. 1729 CGI), applied by the tax authority as soon as the error is repeated across several returns.
• Joint liability in construction subcontracting: if the subcontractor invoices with VAT when they should invoice ex-VAT, the main contractor may be held jointly liable.

The underestimated risk: most businesses assume the risk is automatically offset (output VAT equals input VAT). That is often true in economic terms, but the tax authority penalises the declarative failure independently of the final financial impact. Penalties of 5% on a large base can represent significant amounts even when the net tax position is nil.

The roll-out of mandatory e-invoicing (facturation électronique) in France creates a new coherence requirement. The timetable is now fixed: from 1 September 2026 every VAT-registered business must be able to receive an electronic invoice, and large companies and mid-caps must issue them; SMEs, small businesses and micro-enterprises start issuing on 1 September 2027. Invoices exchanged between taxable persons will carry the applicable VAT treatment in structured fields, reverse charge designation included.

Software publishers will need to handle reverse charge natively within the structured fields of the e-invoice format. For construction businesses or importers, this is a point to anticipate when configuring their management systems.

For an overview of French tax filing obligations in 2026, see our article on mandatory tax declarations for businesses in 2026.

Sound risk management operates on three levels: qualification, procedure and control.

Qualify upfront. Before issuing or receiving an invoice, determine whether the transaction falls within a reverse charge case. This qualification should be embedded in purchase terms and conditions, subcontracting contracts and purchase orders.

Standardise invoice wording. The wording "Autoliquidation" is due as soon as the customer is the person liable for the tax (art. 242 nonies A, I, 13° of annex II to the French Tax Code), for subcontracted construction works as well as for services bought from a foreign provider. In intra-EU B2B the usual form is "Autoliquidation, art. 196 of Directive 2006/112/EC". An invoice template that has not been updated creates exposure.

Run monthly controls. For businesses with regular reverse charge flows, a monthly reconciliation between CA3 lines and accounting entries is essential. This control can be built into the monthly or quarterly closing review.

Hayot Expertise recommendation: if your business processes more than ten reverse charge transactions per month (imports, construction subcontractors, foreign service providers), treat this flow as a dedicated accounting process — with written procedures, a named owner and traceable monthly controls. Volume makes the repetition of a single error very costly.

When a tax inspection covers VAT, auditors focus primarily on:

• Consistency between lines A2, A3, A4 and B2 of the CA3 and the corresponding customs declarations or foreign supplier invoices.
• Presence of the mandatory wording on construction subcontracting invoices.
• Absence of double deduction (reverse-charged VAT claimed as deductible on top of VAT already invoiced for the same transaction).
• Alignment between the declaration period and the date of the transaction (reverse-charged VAT must be declared in the period in which the transaction is carried out).
• Completeness of the audit trail: invoice, customs declaration, accounting entry, CA3 return.

For foreign businesses carrying out transactions in France, the question arises differently. When a foreign provider supplies a French VAT-registered professional customer, reverse charge applies: the provider invoices without French VAT and the customer declares it.

However, if the foreign provider supplies French private individuals or non-taxable entities, it must register for French VAT and collect the tax directly. Reverse charge does not apply.

This point is particularly important for businesses selling digital services into France: the B2B/B2C distinction entirely determines the VAT treatment.

French VAT reverse charge is a statutory mechanism, mandatory in the cases set out by the CGI, with no opt-out. The main watchpoints for 2026 are:

• The generalisation of import reverse charge since 2022: no advance customs VAT payment, but a declarative obligation on the CA3.
• The mandatory wording on construction subcontracting invoices: its absence is a red flag during inspections.
• The treatment of SaaS services and foreign providers: an angle frequently overlooked by SMEs.
• Consistency between the CA3 and accounting entries: a monthly reconciliation is the best form of protection.

For further reading on VAT declaration mechanics, see our article on taxation and VAT, corporate tax and instalment declarations.

This article is written for information and guidance purposes only. It does not substitute for a personalised analysis of your situation. Tax rules may change: consult a chartered accountant for any specific case.

Sources: Art. 293 A CGI and Art. 283, 2 nonies CGI (Légifrance), Art. 1788 A CGI (Légifrance), Art. 242 nonies A of annex II to the CGI (Légifrance), form 3310-NOT-CA3 notice, 2026 edition (impots.gouv.fr), Douane.gouv.fr, BOFiP BOI-TVA-DECLA-10-10-20.