You live in London, New York, Dubai or Singapore, and your French company has just closed its first profitable year. The Paris accountant sends two documents you did not expect: a schedule of four advance payments already due during the year, and a corporate tax return to file within three months of the year-end. No French tax office sent you a bill first, because France does not work that way: the company itself must compute, declare and pay its corporation tax on fixed statutory dates, and every missed date starts interest running automatically. For a foreign founder or a foreign parent company, this self-assessed system is the single biggest surprise of doing business in France, and it is also where the costliest mistakes happen — paying late, filing late, or assuming that profits booked abroad escape French tax when the real decisions are taken in France. This guide explains the full first cycle in English, with the official texts and the court decisions that concern foreign-owned businesses directly: who pays the 25% rate and on which profits, how the quarterly instalments and the final balance work, how losses can be carried forward, what the local business tax adds on top, and how you challenge a tax bill without flying to France.

I. How Your French Company Calculates and Pays Its Corporation Tax From Abroad

A. Is Your French Company Liable for French Corporation Tax and What Does the 25% Rate Apply To?

French corporation tax is called impôt sur les sociétés, usually shortened to IS. It is governed by the Code général des impôts (CGI), the French general tax code. The starting rule is broad: Article 206 of the CGI provides that « sont passibles de l’impôt sur les sociétés, quel que soit leur objet, les sociétés anonymes, les sociétés en commandite par actions », meaning that public limited companies and partnerships limited by shares are liable for corporation tax whatever their business, and the same article extends the charge to private limited companies (SARL), cooperatives and any legal person carrying on a profit-making activity. In practice, the vehicles foreign founders use most — the simplified joint-stock company (SAS, or SASU with a single shareholder) and the private limited company (SARL, or EURL with a single shareholder) — are therefore corporation-tax payers by default from the day they are registered, unless they have validly elected for transparent partnership taxation where that option exists. Registration itself happens through the single online business formalities portal (guichet unique), and the resulting entry feeds the National Register of Enterprises (RNE, Registre national des entreprises); the company then receives its SIREN number, the nine-digit national business identifier, and its Kbis extract, the official company identity document issued from the trade and companies register (Registre du commerce et des sociétés) kept by the greffe, the court clerk’s office. Once that Kbis exists, the tax administration knows the company, and the corporation-tax clock starts.

The rate is straightforward. Article 219 of the CGI states: « Le taux normal de l’impôt est fixé à 25 %. », meaning the standard rate of the tax is set at 25%. Taxable profit is rounded to the nearest euro, and the 25% rate applies to the standard taxable result, while specific categories such as certain long-term capital gains follow their own separate rates within the same article. The official impots.gouv.fr guide on the taxation of business results confirms the filing of return no. 2065-SD and the 25% standard rate. For a foreign shareholder, the practical question is always the same: 25% of what? The answer starts with French accounting profit, adjusted by the tax rules on deductible and non-deductible items, and it ends with the territoriality rule that decides which profits France may tax at all.

Territoriality is where foreign groups win or lose. Article 209 of the CGI limits the charge to profits « en tenant compte uniquement des bénéfices réalisés dans les entreprises exploitées en France », meaning only profits earned in businesses operated in France are taken into account, plus profits whose taxation is attributed to France by an international double-tax treaty. The Conseil d’État, France’s highest administrative court, drew the consequence in plain terms on 18 October 2018 (appeal no. 405468, full decision on legifrance.gouv.fr): « ne sont passibles de l’impôt sur les sociétés que les seuls bénéfices réalisés dans des entreprises exploitées en France ou dont l’imposition est attribuée à la France par une convention internationale relative aux doubles impositions », meaning only profits earned in businesses operated in France, or attributed to France by a double-tax treaty, are liable for corporation tax. In that case, a British company organising executive seminars from a rented chalet in Haute-Savoie argued it had no French taxable presence; the court tested the facts against the treaty’s permanent-establishment clause and the domestic exploitation test. The lesson for a foreign parent is symmetrical: a French subsidiary registered with a Kbis is plainly operated in France and taxed on its French profits, while a foreign company with no French registration can still be pulled into French corporation tax if it is found to operate a fixed place of business on French soil.

The Paris administrative court of appeal applied exactly that logic to a Hong Kong company on 4 June 2025 (case no. 24PA00821, full decision on legifrance.gouv.fr). Ly Eco Limited, a Hong Kong business selling reusable bags, claimed it acted entirely from Hong Kong and had no stable establishment in France. After premises searches, international administrative assistance and an accounting audit covering 2005 to 2014, the administration assessed corporation tax plus local business taxes for 2008 to 2014, and the court upheld the charge, holding that the company « doit être regardée, au cours de la période vérifiée, comme ayant exploité son activité en France au sens des dispositions du I de l’article 209 du code général des impôts », meaning it had to be regarded, over the audited period, as having operated its business in France within the meaning of Article 209(I) of the CGI. The facts were decisive: staff domiciled and working in France inside another group company, French fixed telephone lines on the Hong Kong company’s documents, invoicing and accounting in French performed in French premises, redirection of Hong Kong mail to France, bank accounts managed from France, and price, margin, contract and payment decisions taken in France by people domiciled in France. The court added that the company could not usefully rely on the 2010 France-Hong Kong double-tax agreement having failed to show it was subject to any tax in Hong Kong. For a founder running a French operation by remote control, the message is blunt: where the people, the phones, the accounts and the decisions are in France, the profit is taxed in France, whatever the letterhead says.

Losses are not wasted, but they are capped. Article 209(I) of the CGI further provides that « ce déficit est considéré comme une charge de l’exercice suivant et déduit du bénéfice réalisé pendant ledit exercice dans la limite d’un montant de 1 000 000 € majoré de 50 % du montant correspondant au bénéfice imposable dudit exercice excédant ce premier montant », meaning a loss for one year is treated as a charge of the following year and deducted from that year’s profit up to 1 million euros plus 50% of the taxable profit exceeding that first amount, with any unused excess carried forward on the same terms. A young subsidiary that loses 400,000 euros in year one and earns 600,000 euros in year two therefore offsets the full earlier loss against the later profit, while a large profitable group clears only the capped fraction each year and pushes the remainder forward. This carry-forward is automatic in the return, but it depends on proper filing: unfiled years and undocumented losses are the first things an auditor discards. Keep the French statutory accounts, the tax return bundle (liasse fiscale) and the shareholder minutes approving the accounts together, because the loss you cannot evidence is the loss you cannot use.

B. How Do You Pay on Time From Abroad: Quarterly Instalments, Final Balance and the 2065 Return?

France collects corporation tax before it knows the final profit. Article 1668 of the CGI states: « L’impôt sur les sociétés donne lieu au versement, au comptable public compétent, d’acomptes trimestriels déterminés à partir des résultats du dernier exercice clos. », meaning corporation tax gives rise to payment, to the competent public accountant, of quarterly instalments calculated from the results of the last closed financial year. Each instalment is rounded to the nearest euro, and the statute fixes the calendar without ambiguity: « Les paiements doivent être effectués au plus tard les 15 mars, 15 juin, 15 septembre et 15 décembre de chaque année. », meaning payments must be made no later than 15 March, 15 June, 15 September and 15 December of each year. The company computes each instalment itself from the previous year’s taxed result, pays it electronically from wherever its bank account sits, and files nothing at that stage beyond the payment reference. Newly created companies, and companies newly subject to corporation tax, are exempt from instalments during their first year of activity or first tax period, which softens the landing for a freshly registered SAS or SARL; from the second year, the quarterly rhythm applies in full. Companies whose turnover exceeds 250 million euros face a reinforced last instalment of at least 95% of the estimated tax for the year, rising to 98% above 1 billion euros, but a founder-owned subsidiary will rarely meet those thresholds.

The year ends with a settlement. Once the profit for the year is known, the company liquidates the tax due on the basis of the return and pays any balance when filing the statement of balance (relevé de solde), no later than the 15th day of the fourth month following the end of the financial year — 15 May for a 31 December year-end. Overpaid instalments are refunded or credited. The return itself is return no. 2065 and its annexes, filed electronically through the business tax account on impots.gouv.fr. Article 223(1) of the CGI sets the filing rule: « la déclaration du bénéfice ou du déficit est faite dans les trois mois de la clôture de l’exercice. », meaning the declaration of profit or loss must be made within three months of the end of the financial year, and « Si l’exercice est clos le 31 décembre ou si aucun exercice n’est clos au cours d’une année, la déclaration est à déposer au plus tard le deuxième jour ouvré suivant le 1er mai. », meaning where the year ends on 31 December, or where no year ends during a calendar year, the return must be filed no later than the second working day after 1 May. The official impots.gouv.fr page on taxable business results confirms the 2065-SD deadline on the last day of the third month after closing. Together with the return, the company must supply the documents listed by the same article — board or shareholder reports and meeting extracts, the statement of distributed profits — plus the statutory accounts schedules. For a director living abroad, the practical chain is therefore: close the accounts, hold the annual approval meeting within six months of the year-end under company law, file the 2065 bundle within three months of closing, and pay the balance by the 15th of the fourth month. Miss one link and the next section of this article starts costing money.

Running this cycle from abroad is an organisational question, not a legal impossibility. The business tax office competent for the company is the SIE (service des impôts des entreprises), the local business tax office for the place of the registered office; a Paris-registered SAS deals with the Paris SIE network, files and pays online, and receives its notices in the professional account (espace professionnel) on impots.gouv.fr, which the foreign director or the appointed French accountant must actually monitor. Mandates for electronic payment (mandats de télépaiement) should be set up in the first months, because a revoked or missing mandate is a classic cause of a technically late payment that still bears interest. Domiciliation matters too: the registered office (siège social) determines the competent SIE and the address for formal notices, so a change of domiciliation company in Paris must be followed by checking that the professional account and the SIE assignment followed. None of this requires residence in France; it requires a monitored account, a funded French or SEPA bank account, and an accountant who diaries 15 March, 15 June, 15 September, 15 December and the return date every year. The companies that pay penalties are almost never the ones that disputed the law; they are the ones that never saw the deadline.

II. What Comes on Top of Corporation Tax and How Do You Challenge a Bill From Abroad?

A. What Else Hits the Bank Account: CFE Local Tax, Late Interest and Surcharges?

Corporation tax is not the only recurring charge. Almost every company operating in France owes the CFE (cotisation foncière des entreprises), the local company property tax that funds municipalities, even when it owns no premises and even when its director lives abroad. Article 1447 of the CGI provides: « La cotisation foncière des entreprises est due chaque année par les personnes physiques ou morales », meaning the CFE is due each year by individuals and legal persons, and more precisely by those habitually carrying on a non-salaried professional activity. The base is the rental value of the premises the company uses — or a minimum base set by the municipality where the premises are small or the company is domiciled with a domiciliation provider — and the bill arrives once a year, usually payable by mid-December, with an advance of 50% of the previous year’s CFE where the amount exceeds a threshold. The English-language service-public.fr guide on the CFE confirms the yearly charge, the initial declaration 1447-C-SD for a new business, and the online services for declaring and paying. New companies are exempt from CFE in their first calendar year of activity, which means a SAS registered in October pays no CFE that year but enters the full cycle the next December — another date for the foreign director’s diary. Larger businesses also meet the CVAE (cotisation sur la valeur ajoutée des entreprises), the second layer of the local business tax (contribution économique territoriale), charged on value added above a turnover threshold; most founder-owned subsidiaries stay below it, but groups approaching the threshold should model it before the year-end, not after the assessment arrives.

Late payment is priced by statute, not negotiated. Article 1727 of the CGI states: « Toute créance de nature fiscale, dont l’établissement ou le recouvrement incombe aux administrations fiscales, qui n’a pas été acquittée dans le délai légal donne lieu au versement d’un intérêt de retard. », meaning any tax claim handled by the tax administration that is not paid by the legal deadline gives rise to late-payment interest. The interest runs month by month from the due date until payment, and it applies to late instalments, a late final balance and a late CFE alike. On top of interest, the CGI adds fixed sanctions: a standard 5% surcharge for late payment of tax shown on a return, 10% for a late return filed within thirty days of a formal notice and 40% beyond that, higher rates for undeclared activity, plus specific penalties for missing or inaccurate schedules. The Ly Eco decision shows the extreme end of that scale: a foreign company that never registered, never filed and never told the authorities about its French activity was taxed over ten years as operating on an undisclosed basis, with penalties to match. For an ordinary late payer the arithmetic is simpler but still painful: a 20,000-euro balance paid three months late costs the 5% surcharge plus three months of interest, and the same arithmetic repeats on each late instalment. Interest and surcharges are assessed automatically, so the fix is equally mechanical — pay the principal immediately to stop the clock, then check whether a legal ground for relief exists rather than waiting for the administration to call.

Relief exists but it is narrow and written. Spontaneous payment before any audit notice, a first offence, genuine difficulty documented with bank statements, and immediate compliance for the future are the facts the administration weighs when asked for a discretionary reduction (remise gracieuse) of penalties, while interest for the period of actual delay is almost never remitted. A rejected electronic return 2065, a revoked payment mandate, or a domiciliation change that diverted the mail are explanations, not excuses, unless they are evidenced and the company regularised at once. The companion question of the annual legal calendar — approving the accounts, holding the meeting and filing with the greffe — is covered in detail in our guide to the French company’s annual legal calendar from abroad, and the founding steps of bank account, Kbis, VAT and first hire are set out in our guide to setting up a company in France as a foreign founder; tax compliance sits on top of that corporate calendar, and a missed corporate filing often signals a missed accounts filing too. BODACC (Bulletin officiel des annonces civiles et commerciales), the official gazette of business notices, publishes creations, insolvencies and certain corporate events, but it never publishes tax assessments — so a clean BODACC says nothing about the state of the tax account. Only the professional account and the SIE statements tell the truth, and they should be reconciled every quarter.

B. How Do You Challenge a Corporate Tax Bill Without Flying to France?

Every additional assessment arrives with a paper trail, and that trail dictates the remedy. After an accounting audit (vérification de comptabilité), the administration notifies a proposed reassessment (proposition de rectification), the company replies with written observations, and the administration confirms or drops each head of adjustment; only then does the additional tax become collectible, and only then do the time limits for challenge start. The administration’s right to go back in time is itself capped. Article L169 of the Tax Procedures Book (Livre des procédures fiscales, LPF) provides: « Pour l’impôt sur le revenu et l’impôt sur les sociétés, le droit de reprise de l’administration des impôts s’exerce jusqu’à la fin de la troisième année qui suit celle au titre de laquelle l’imposition est due. », meaning for income tax and corporation tax the administration’s right of reassessment runs until the end of the third year following the year for which the tax is due. The same article extends the period to ten years where the taxpayer carries on an undisclosed activity or benefits from income distributed by a person carrying on such an activity, and the Ly Eco judgment (CAA Paris 4 June 2025, no. 24PA00821) quotes the operative definition: « L’activité occulte est réputée exercée lorsque le contribuable ou la personne morale mentionnée à la première phrase du présent alinéa n’a pas déposé dans le délai légal les déclarations qu’il était tenu de souscrire et soit n’a pas fait connaître son activité à l’organisme mentionné au deuxième alinéa de l’article L. 123-33 du code de commerce, soit s’est livré à une activité illicite », meaning an undisclosed activity is deemed to exist where the taxpayer neither filed the returns it was required to file on time nor declared its activity to the business formalities body or court clerk, or engaged in unlawful activity. A registered SAS that files every year therefore faces the standard three-year window; a structure that operated in France for years without registering, filing or declaring faces ten. Registration and filing are not just compliance — they are the legal boundary between the two limitation periods.

The challenge itself starts on paper, from anywhere. Article L190 of the LPF provides: « Les réclamations relatives aux impôts, contributions, droits, taxes, redevances, soultes et pénalités de toute nature, établis ou recouvrés par les agents de l’administration, relèvent de la juridiction contentieuse lorsqu’elles tendent à obtenir soit la réparation d’erreurs commises dans l’assiette ou le calcul des impositions, soit le bénéfice d’un droit résultant d’une disposition législative ou réglementaire. », meaning claims about taxes and penalties assessed or collected by the administration fall under the contentious jurisdiction where they seek to repair errors in the basis or computation of the assessment or to obtain the benefit of a right under legislation or regulations. In practice the foreign director, usually through the French accountant or counsel under a written authority, files a formal claim (réclamation contentieuse) with the competent SIE, attaching the assessment, the return, the accounts and every supporting document, and stating each legal ground separately: wrong territoriality analysis, treaty protection as the effective taxpayer elsewhere, deductible charges disallowed in error, capped loss carry-forward miscalculated, or penalties disproportionate to a first, spontaneous regularisation. The administration must answer with a reasoned decision admitting or rejecting the claim in whole or in part; silence kept beyond six months counts as an implied rejection that opens the next level. If the claim fails, the company appeals to the administrative court (tribunal administratif) of the place of taxation — the Paris court for a Paris-registered company — then, on appeal, to the administrative court of appeal (cour administrative d’appel), and finally to the Conseil d’État on points of law, exactly the path both the Aravis and Ly Eco companies followed from Grenoble and Paris to Lyon, Paris and the Conseil d’État.

Two practical defences dominate for foreign-owned companies, and the two decisions above frame them. The first is territoriality and treaty protection: show, with leases, payroll records, board minutes, travel logs and banking authorities, where the fixed establishment really sits and where the effective management really decides, because the administration will assemble the mirror file — seized documents, phone records, accounting locations, mail redirection, decision chains — as it did against Ly Eco. A claim that « the profits were booked in Hong Kong » fails on its own; a claim that the Hong Kong company was actually taxed in Hong Kong, held board meetings there, employed staff there and decided prices there, evidenced document by document, is the only version the courts can accept. The second is the computation itself: rebuild the taxed result line by line from the French statutory accounts, verify the 25% rate application, the separate treatment of qualifying long-term gains, the 1-million-plus-50% loss cap, the credit for instalments already paid, and the interest arithmetic, because assessment notices do contain arithmetic errors and the L190 remedy expressly covers the correction of errors in the basis or computation of assessments. File the claim from abroad by registered electronic means with proof of sending, keep paying the undisputed part to stop interest on that part, and ask the court for a stay of payment for the disputed part where the statute allows it, with suitable guarantees. URSSAF (Unions de recouvrement des cotisations de sécurité sociale et d’allocations familiales), the social-security collection agencies, run a parallel audit track for social charges that must not be confused with the tax audit; a tax claim filed with the SIE does not suspend a URSSAF assessment, and each body gets its own file and its own deadlines. The foreign director who separates the two tracks, diaries both, and evidences every figure wins more often than the one who argues loudest.

Conclusion

The first corporation-tax cycle of a French company is a fixed sequence that works perfectly well from abroad once it is understood as a sequence: register and obtain the Kbis, pay four quarterly instalments computed from the previous year’s result on 15 March, 15 June, 15 September and 15 December, file return 2065 within three months of closing, pay the balance by the 15th of the fourth month, carry forward unused losses within the 1-million-plus-50% cap, and pay the yearly CFE on top. The 25% rate is the least of it; the territoriality test of Article 209, the treaty allocation of taxing rights, the three-year reassessment window that becomes ten for undisclosed activity, and the automatic pricing of delay through interest and surcharges are what decide the real cost. The Hong Kong and British companies in the two court decisions lost not because foreign ownership is punished, but because the facts placed the business, the staff and the decisions in France while the paperwork pointed elsewhere — and the courts taxed the facts. Put the paperwork where the facts are, file and pay on the statutory dates through a monitored professional account, reconcile the SIE statements every quarter, and challenge quickly and precisely when an assessment is wrong. Run from abroad with French dates in the diary, the French subsidiary pays the French tax it owes — no more, and no later than the law requires.