You live in London, New York, Montreal or Dubai, and this morning your French accountant forwards you a registered letter you never expected: the French tax administration is opening a verification of your company’s accounts. The letter is called an avis de vérification (audit notice), it names the financial years under review, and it sets a first meeting in a few weeks at premises you have not visited in months. From abroad, the reflex is either panic or inertia, and both are expensive. Panic makes founders dump boxes of unsorted documents on the auditor; inertia lets the thirty-day reply clock run out on a reassessment they never read. This guide explains, for a foreign owner running a French company from another country, what a French tax audit (vérification de comptabilité, the on-site inspection of a company’s books) really is, how the notice, the on-site checks and the time limits work, how to answer the proposed reassessment (proposition de rectification, the formal document listing each adjustment and its penalty) without boarding a plane, and where the two recent rulings of the Cour de cassation (France’s highest civil court) give you genuine leverage. Every decisive rule below is anchored to the exact statutory text and to decisions you can open yourself, because in French tax litigation a procedure won on paper beats an argument won in a meeting.

I. You just received an avis de vérification: what the tax audit of your French company really means

A French tax audit of a company is a formal, adversarial procedure with written guarantees, not an informal visit. The administration checks your books on site, following the rules of the tax procedure code, and every step it skips or botches can cancel the resulting tax bill. For a foreign director, the first battle is therefore fought on the notice itself: is it valid, what does it trigger, and who goes to the meeting in your place.

A. The audit notice, the taxpayer charter and your right to counsel: answering from abroad

The starting point is simple and strict: an on-site verification of your accounts cannot begin until you have been told about it in writing. The tax procedure code states that a verification of accounts cannot be started unless the taxpayer has been informed by the sending or the handing over of an audit notice, and that notice must state the years under review and mention expressly, failing which the whole procedure is void, that the taxpayer may be assisted by counsel of his choice, as provided in article L. 47 of the Livre des procédures fiscales (the LPF, the French tax procedure code). Read that sentence twice if you run your company from abroad. The notice must reach the company, name the audited years, and spell out the right to be assisted. If any of these elements is missing, the nullity argument exists from day one, and your Paris counsel raises it in writing before any discussion of figures.

The same article adds two practical tools foreign owners constantly underuse. First, the notice must tell you that the charter of the audited taxpayer’s rights and obligations (charte des droits et obligations du contribuable vérifié, the official guide to audit guarantees) can be read on the tax administration’s website or handed to you on simple request. Ask for it, read it, keep proof of the request. Second, in the case of an unannounced inspection aimed at noting the physical state of the business or the existence of accounting documents, the notice and the charter are handed over at the start of the on-site findings, and the substantive review of the books cannot begin until a reasonable period has passed so that you can arrange for counsel. That reasonable delay is your window to appoint a French accountant (expert-comptable) and a lawyer in Paris, send them a written power of attorney, and align on a line of defence before the auditor opens the ledgers. Foreign founders who call their advisers the day the notice arrives use this window; those who wait for the first meeting waste it.

Do not confuse this company audit with the two neighbouring procedures whose letters look alike. The personal tax review (examen contradictoire de la situation fiscale personnelle, the deep check of an individual’s income tax file) targets you as an individual, not your SAS or SARL. The social security audit (contrôle URSSAF, run by URSSAF, the body collecting employer social contributions, and not by the tax office) targets payroll charges, and it follows its own rules, as explained in our guide on challenging a URSSAF audit from abroad. When the letter comes from the service des impôts des entreprises (the SIE, the local branch of the Direction générale des finances publiques, the French tax administration, universally shortened to DGFIP), and it speaks of verifying the company’s accounts, you are in a vérification de comptabilité, governed by the articles below. Keep the envelope, the postmark and the tracking slip: as the first court ruling in this guide shows, the administration bears the burden of proving that its registered letter was properly delivered, and a file kept from day one is what makes that argument winnable two years later.

The legal basis of the on-site check itself is worth knowing, because it also contains your best logistical card as a non-resident director. The code provides that tax agents verify on site, under the rules of the procedure code, the accounts of taxpayers required to keep and present accounting documents, and it adds that the verification may also be held or continued in any other place agreed jointly by the taxpayer and the administration, in the words of article L. 13 of the Livre des procédures fiscales. Your registered office (siège social, the legal address on your Kbis, the official identity card of a French company issued by the greffe, the commercial court registry) is the default venue, and the auditor is entitled to work there. But the agreed-other-place option is real: companies whose books are kept by an outside accountant routinely have the audit take place at the accountant’s office, and a foreign-held company can propose, in writing and early, that meetings run at its Paris counsel’s or accountant’s premises, with the director joining the key sessions remotely and counsel physically present. The administration may instead decide to continue the verification in its own offices if no agreement is reached, so frame the request as a concrete proposal with dates, an address and a contact, not as a refusal to receive the auditor.

Three reflexes in the first 48 hours after the notice lands. First, forward the letter the same day to your accountant and your lawyer, with the envelope and the full history of the audited years: filed corporate tax returns (liasse fiscale), VAT returns, ledgers, bank statements, major contracts and invoices. Second, freeze routine destruction and routine reclassification: do not rewrite, backdate or tidy anything, because a coherent file with a few explainable weaknesses beats a polished file the auditor no longer trusts. Third, calendar the procedure: note the years named in the notice, because the auditor cannot silently extend the audit to other years without a fresh notice, and note the expiry of the recovery period for each year, since time limits cut both ways, as explained below. If your company also has VAT or payroll arrears running in parallel, read our guides on French VAT registration and penalties and on the corporate tax and accounts calendar before the first meeting, so the audit does not expose a second front you had forgotten.

B. On-site checks, duration and documents: what the auditor can do and how a Paris file runs

Once the notice period has run, the auditor examines your books at the agreed venue: sales and purchase ledgers, bank statements, invoices, contracts, payroll records, and, for computerised accounts, the data and processing systems themselves. The code extends the check to all information, data and computer processing that directly contributes to accounting results, which in practice means your invoicing software, your bank exports and your spreadsheets are all within scope. Foreign founders are often surprised by how granular this gets: the auditor reconciles declared turnover with bank credits, tests invoice sequences for gaps, checks that intra-group charges from the foreign parent correspond to real services, and samples expense receipts. Since September 2026 your company must also issue electronic invoices through approved platforms, so an auditor in 2026 routinely cross-checks the e-invoicing trail against the ledgers; the reform is described in our guide to electronic invoicing deadlines and platforms. A company whose daily invoicing is clean usually survives the sampling; a company whose invoices live in three mailboxes does not.

Duration is capped for most foreign-owned SMEs, and the cap has teeth. The statute provides that, failing which the assessment is void, the on-site verification of books cannot extend beyond three months for industrial and commercial businesses whose turnover stays under the legal thresholds, under article L. 52 of the Livre des procédures fiscales. Most French subsidiaries and branches of foreign groups fall under this shelter. The three months run from the first on-site intervention, and the expiry of the period cannot be held against the administration only in narrow listed cases: handling your later observations, examining mixed private-professional bank accounts, auditing separate activities, or serious accounting irregularities that strip the books of probative value, in which case the on-site work cannot exceed six months. Two consequences follow for a director abroad. First, the auditor has an incentive to move fast, so your side must be ready faster: staged, complete document production in the first weeks shortens the audit and narrows its appetite. Second, if the auditor lingers on site beyond the cap without fitting one of the exceptions, the resulting assessments can be annulled, which is why your counsel logs every visit date, every request and every handover with written receipts.

The adversarial principle (débat oral et contradictoire, the rule that the auditor must discuss findings with you before finalising them) structures the whole visit. The auditor must hold a genuine discussion of the envisaged adjustments with you or your representative before the audit closes, and the closing meeting (réunion de synthèse) is where experienced counsel earns its fee: each envisaged adjustment is debated, documents are produced on the spot, and several points routinely die there. A foreign director cannot improvise this from another time zone. Give your Paris accountant and lawyer a precise written mandate, brief them on the sensitive items (shareholder current account movements, management fees billed by the foreign parent, cash expenses, property valuations), and let them attend every session. Between sessions, the auditor sends information requests; answer each one in writing, completely and within the stated time, and keep copies. Silence or partial answers at this stage become, months later, the factual basis of the deliberate-fault penalty.

The Paris and Île-de-France reality deserves a paragraph, because most foreign-owned French companies are audited there. Your file sits with a Paris SIE under the regional directorate for Île-de-France and Paris (the DRFIP, the regional arm of the DGFIP), correspondence arrives in French to the registered office, and the auditor expects a French-speaking contact who can produce documents within days. Companies domiciled with a domiciliation provider (société de domiciliation) must organise mail forwarding with particular care: a notice sitting unopened at a domiciliation address still starts the clock. If your registered office is in Paris or the inner suburbs, propose a Paris venue for the checks, keep a local document set (physical or secure digital access managed by your accountant), and designate one Paris-based point of contact. The two court decisions analysed below both travelled through the Paris Court of Appeal (pôle 5, chambre 10, the chamber hearing tax cases) before reaching the Cour de cassation, which tells you where your case would be argued if it goes to court: Paris counsel who pleads there regularly is not a luxury, it is the default setting of the forum.

II. You received a proposition de rectification: how to reply within 30 days and challenge it from abroad

The audit closes, and weeks later a second registered letter arrives: the proposed reassessment. This document, not the audit itself, is the act you must defeat, adjust or accept. It lists each adjustment (rehaussement), the duties claimed and the penalties attached, and it opens a short, strict reply period. Everything in this second phase rewards the foreign owner who answers fast, in writing and with reasons, and punishes the one who treats a French administrative letter as a draft to think about.

A. Reply to the proposed reassessment and attack the 40 percent penalty: the two court rulings that protect you

The proposed reassessment must be reasoned well enough to let you answer it. The statute states that the administration sends the taxpayer a proposed rectification which must be reasoned so as to allow him to submit observations or to signify acceptance, as set out in article L. 57 of the Livre des procédures fiscales, and it adds that when the administration rejects your observations, its reply must also be reasoned. Concretely, each adjustment must identify the legal basis, the facts and the figures, so that your response can target them one by one. A proposal that asserts figures without showing their construction is vulnerable, and your observations should say so explicitly, adjustment by adjustment, instead of offering a global protest. At the end of the procedure the administration must also state, before you present observations or accept, the amount of the duties, taxes and penalties resulting from the envisaged adjustments, under article L. 48 of the Livre des procédures fiscales. Check the arithmetic as carefully as the law: totals that do not match the line items, penalties applied to the wrong base, or interest counted twice are errors your reply must itemise, because the judge later reads your observations first.

The reply period is thirty days from receipt, extendable once by thirty days if you ask before it expires. The Cour de cassation recalls the mechanics in plain terms: the administration sends a proposed rectification which must be reasoned so as to allow the taxpayer to submit observations or to signify acceptance within thirty days from receipt of the proposal, in the words of the ruling Cass. com., 10 May 2024, No. 22-14.130. From abroad, organise the chain now, not when the letter arrives: accountant drafts the technical reply, lawyer frames the legal grounds, director validates by email, and the letter goes back by registered post with acknowledgment of receipt before the deadline. Request the extra thirty days systematically and in writing as soon as the proposal arrives; it is routinely granted when asked in time, and it buys the room to gather foreign-parent evidence (transfer pricing support, group invoices, bank proof of payments) that never arrives within the first month. Never let the deadline pass in silence: an unanswered proposal becomes an enforceable assessment (mise en recouvrement, the collection notice), and you then fight uphill to undo it.

The first ruling every foreign owner should know concerns delivery itself, and it is a genuine shield for companies whose mail crosses borders or sits at a domiciliation address. In the 10 May 2024 case, a registered letter containing a proposed rectification had come back to the administration marked unclaimed after two days, and the Paris Court of Appeal had treated the notification as regular. The Cour de cassation quashed that reasoning and laid down the rule: where the distribution of a registered postal item is impossible, the addressee is notified that the item is held at the post office for fifteen calendar days, and only after that period may it be returned to the sender; therefore, where notification is disputed, the tax administration, which bears the burden of proving regularity, must show both that the addressee was warned by a delivery notice that the letter was held at his post office for fifteen days from the date of the visit, and that the letter was returned only after that period expired, in the holding of Cass. com., 10 May 2024, No. 22-14.130. The lesson is operational: if a proposal allegedly notified to your French registered office bounced back in a few days, demand the administration’s proof of the fifteen-day holding period and of the delivery notice. If it cannot produce them, plead nullity of the procedure in your observations and again in your claim. Keep every tracking slip, every forwarding instruction to your domiciliation provider, and every proof of your actual address abroad: this defence is won with envelopes, not adjectives.

The second ruling concerns the penalty that hurts most: the 40 percent surcharge for deliberate fault (manquement délibéré, the increase applied when inaccuracies in a return are deemed intentional). The code provides that inaccuracies or omissions found in a return lead to a 40 percent increase in the case of deliberate failure, as stated in article 1729 of the Code général des impôts (the CGI, the French general tax code), rising to 80 percent for abuse of law, fraud or concealment of part of a contract price. The administration loves this surcharge because it almost doubles the bill; the courts require it to prove intent, not just arithmetic. On 8 July 2026 the Cour de cassation drew the line crisply: the statute applies a 40 percent increase for deliberate failure, and where registration duties are contested the burden of proving bad faith lies with the administration; ruling on a case where the appeal court had inferred intent from undervaluations of roughly 32, 36 and 41 percent on Paris properties in a well-known rising market, the Court held that reasoning based on grounds incapable of establishing the taxpayer’s intention to evade tax by supplying inaccurate information gives the decision no legal basis, in the holding of Cass. com., 8 July 2026, No. 25-17.275. Translate this into your reply: for every adjustment carrying the 40 percent surcharge, demand the facts showing intention (concealed documents, false invoices, repeated warnings ignored), and explain each error by its real cause (accounting mistake, debatable valuation, misunderstood foreign document). Size alone is not intent, and since July 2026 you cite the paragraph that says so.

Build each reply as a standalone court exhibit, because it will become one. Number the adjustments as the proposal does, answer each with facts, documents and legal basis, attach numbered exhibits with an index, quantify what you concede (conceding a small, well-founded adjustment strengthens the challenge to the rest), and close with precise requests: cancellation of specified adjustments, discharge of specified penalties, and, where the figures are debatable, referral to the departmental commission for direct taxes and turnover taxes (commission des impôts directs et des taxes sur le chiffre d’affaires, the joint advisory body that gives an opinion on factual disputes). Send it by registered letter with acknowledgment of receipt, keep the original, and diary the administration’s reply: its response to your observations must itself be reasoned, and a silent or boilerplate rejection feeds your later claim.

B. Pay, claim or litigate: deadlines, recovery periods and the Paris courts that will hear you

Not every adjustment deserves a war. Sort the proposal into three columns with your advisers: adjustments that are right (pay them fast to stop interest and show good faith), adjustments that are debatable (fight them on facts and law), and penalties that require intent (fight them on proof). Partial acceptance is a normal, respectable outcome: paying the duties on one item while contesting the penalty on all items, or accepting a valuation method while disputing its application to your figures. Where cash is tight, ask the SIE accountant (comptable public, the collection officer) for a payment schedule (délai de paiement) in parallel with the dispute; paying under reservation does not weaken the claim, while enforced collection (bank attachment, saisie) during a dispute you could have calmed is a self-inflicted wound. Diary the collection notice separately from the proposal: once duties are put into collection, the claim clock runs on its own track.

The claim (réclamation contentieuse, the written challenge filed with the tax office) is the mandatory next step before any court. The code opens this contentious route to claims seeking compensation for errors in assessment or calculation or the benefit of a statutory right, and it allows claims once the reply to your observations arrives, or thirty days after the formal notification of the assessment where applicable, under article L. 190 of the Livre des procédures fiscales. File it in French, within the deadline stated on the collection notice, repeating and deepening the proposal-stage arguments with the administration’s reply now in view, and attach the full exhibit set again: the office that decides the claim is not the auditor, and a self-contained file wins faster. If the claim is rejected expressly or by silence, the dispute moves to the administrative court (tribunal administratif, the first-level court for tax disputes), then on appeal to the administrative court of appeal (cour administrative d’appel). Factual tax cases from Paris companies are pleaded in Paris, which is another reason to keep Paris counsel from the notice stage: the lawyer who wrote the thirty-day reply is the lawyer who knows the file at trial.

Watch the recovery period (délai de reprise, the time the administration has to assess back taxes) on every year in play, because it decides how far back the bill can reach. The rule is that for income tax and corporate tax the administration’s recovery right runs until the end of the third year following the year for which the tax is due, in the terms of article L. 169 of the Livre des procédures fiscales. A 2023 corporate tax return is therefore normally beyond reach after 31 December 2026, subject to interrupts (a proposal received in time, a claim filed) that extend the window. The same article stretches the period to ten years where the taxpayer carries on a hidden activity (activité occulte, broadly, trading without declaring existence or filing) or hides behind a false foreign tax domicile. For a foreign-owned company this is the provision to respect most: an undeclared French permanent establishment, invoices issued without any French filing, or a director pretending to be tax-resident abroad while running the company from France can push old years back into the avalanche zone. If the auditor hints at hidden activity, treat it as the most dangerous word in the file: produce registration evidence (Kbis, SIREN, filed returns), regularise filings immediately, and have counsel address the point head-on in the observations rather than letting it mature into a ten-year reassessment.

Penalties stack by behaviour, and the stack is what turns a manageable adjustment into a threat to the business. Late or missing returns draw 10 percent on their own, 40 percent after an unanswered formal demand, and 80 percent where hidden activity is found, under article 1728 of the Code général des impôts. Inaccuracies in filed returns draw 40 percent for deliberate fault and 80 percent for abuse of law, fraud or price concealment, under article 1729 cited above. Read together with the July 2026 ruling, the strategy writes itself: concede and regularise filing delays early (the 10 percent tier rewards speed), contest every deliberate-fault characterisation with intent-focused evidence, and reserve the heaviest artillery for any fraud or hidden-activity allegation, which conditions both the 80 percent tier and the ten-year recovery period. Ask your accountant to model each scenario in euros before you sign anything: founders who see that a conceded 5,000 euro adjustment with a contested 40 percent surcharge is worth 2,000 euros of penalty negotiate differently from founders who only see the headline.

For Paris-based companies, close the loop with local discipline. Centralise all DGFIP correspondence at one monitored address, answer every letter within days even if only to acknowledge receipt and announce a full reply, keep the Kbis, the SIREN/SIRET identifiers (the nine-digit company number and its fourteen-digit establishment version) and the filed returns consistent across every filing, and publish accounts on time: auditors read the public filings (including BODACC, the official bulletin publishing company registrations and insolvencies) before they visit, and inconsistencies between the public file and the ledgers become their first questions. If the audit reveals structural issues (loss-making French subsidiary, undocumented parent charges, chronic late filing), use the post-audit months to fix them with your accountant under the yearly discipline of the legal calendar, so the next auditor finds a different company.

Conclusion

A French tax audit run from abroad is winnable when it is treated as a written procedure with clocks, not as a conversation. The notice must name the years and your right to counsel, the on-site checks must fit the three-month frame for most SMEs, the proposal must be reasoned line by line, its notification must be provable with a fifteen-day holding record, and the 40 percent surcharge must rest on proven intent rather than on the size of the figures. Meet each of these tests with dated, written, reasoned answers, keep every envelope and every handover receipt, and move the sensitive work to Paris counsel and an accountant who attend in your place. Pay what is truly due without delay, fight the rest on facts the file can carry, and watch the recovery periods so no year reopens by accident. Handled this way, the registered letter that ruined your week becomes what French procedure intends it to be: a bounded, adversarial review that ends with a reasoned bill you can pay, claim against or litigate, while your company keeps trading.

Need a quick opinion on your case.

Telephone consultation within 48 hours with a lawyer of the firm. First consultation: 80 EUR incl. VAT. Call +33 6 46 60 58 22 or write via our contact page with your audit notice, your proposed reassessment and your last filed returns: we tell you what to answer, what to pay, and what to challenge.