French Business Tax Obligations 2026: A Complete Filing Calendar

Last updated: 2026-05-25 — Operating a company in France requires navigating a set of overlapping tax and social filing obligations that recur throughout the calendar year. VAT returns, corporate income tax instalments, local business tax, the annual tax return, and payroll declarations each follow their own rules, thresholds and deadlines. For foreign-owned entities, subsidiaries, and international operators, the complexity increases because French obligations run in parallel with any home-country reporting.

This guide provides a structured overview of the mandatory French tax filings for businesses in 2026, with the thresholds, calendar, and practical traps that matter most.

Direct answer: In 2026, mandatory French tax filings for a standard company subject to corporate income tax include: periodic VAT returns (monthly, quarterly, or annual depending on turnover), the annual tax return (liasse fiscale), quarterly corporate tax instalments (IS), the CFE local business tax, and monthly DSN payroll declarations if the company employs staff. The exact scope depends on legal form, tax regime, turnover, and the presence of employees.

French businesses subject to a standard tax regime face five categories of recurring obligations.

VAT (Taxe sur la valeur ajoutée). Under Article 287 of the French Tax Code (CGI), all VAT-registered entities must file periodic returns. Frequency depends on the VAT regime: monthly under the régime réel normal, twice-yearly under the régime simplifié (with two advance payments in July and December), or not at all under the franchise en base if the entity stays below the applicable turnover threshold.

Corporate income tax (IS). Companies subject to IS pay four quarterly instalments and file an annual tax return (liasse fiscale) within three and a half months of the financial year-end. For a 31 December year-end, the filing deadline falls around mid-May of the following year.

Cotisation foncière des entreprises (CFE). This local business tax applies to any entity using premises for professional activities in France. It is assessed on the rental value of the property used. The balance is payable in December; the rate varies by municipality.

Annual tax return (liasse fiscale). This document consolidates the balance sheet, profit and loss account, and the fiscal result adjustment tables. It is filed electronically via the impots.gouv.fr professional portal, usually under a delegation from the company's accountant.

DSN (Déclaration sociale nominative). Any entity with at least one employee must file a monthly DSN through net-entreprises.fr, covering URSSAF contributions, complementary pension, and payroll data. It also feeds the withholding tax (prélèvement à la source) data to the tax authority.

The table below covers a standard corporate entity with a 31 December year-end. Dates may shift when they fall on a weekend or public holiday.

These are reference dates. Official confirmed dates are published annually on impots.gouv.fr. Foreign-owned entities should also check whether their parent-company reporting calendar creates conflicts with French filing windows.

VAT is the most frequent source of compliance errors for international operators.

The three VAT regimes#

Régime réel normal applies above the upper thresholds (indicatively around 840,000 € for goods sales, 254,000 € for services — verify current thresholds for 2026 on impots.gouv.fr). Monthly CA3 returns are required.

Régime réel simplifié applies between the franchise ceiling and the normal regime thresholds. Only one annual return (CA12) is required, with two advance payments in July and December.

Franchise en base applies below the lower thresholds (indicatively 91,900 € for sales, 36,800 € for services — verify for 2026). No VAT is charged or declared. Exceeding the threshold mid-year triggers immediate entry into the réel simplifié.

Intra-community operations#

French entities involved in intra-EU goods or service flows must file the Déclaration d'Échanges de Biens (DEB, now replaced by the Intrastat/Exstat system in most cases) or the état récapitulatif des services for reverse-charge VAT. These obligations apply even when turnover remains below standard VAT thresholds, depending on transaction type.

For a detailed treatment of reverse-charge mechanics and intra-EU billing rules, the autoliquidation de la TVA article covers the most frequent cases encountered in French practice.

Standard rate and reduced rate#

The standard IS rate is 25% in 2026. A reduced 15% rate applies on the first 42,500 € of taxable profit for qualifying SMEs under Article 219 I of the CGI (turnover below 10 million €, capital fully paid up, at least 75% held by individuals).

Instalment calculation#

Each of the four quarterly instalments equals 25% of the IS paid on the most recently filed return. If the final IS for the current year exceeds the total instalments paid, a balance (solde) is due alongside the annual return.

Worked example#

A French SARL providing consulting services closes its financial year on 31 December 2025 with a taxable result of 180,000 €. IS at 25% equals 45,000 € (assuming no reduced-rate tranche applies). In 2026, four instalments of 11,250 € each are due on 15 March, 15 June, 15 September, and 15 December. If 2026 profit matches 2025, the balance at the May 2027 filing is zero.

The cotisation foncière des entreprises applies to all entities carrying out a non-salaried professional activity from a fixed location in France. It is assessed on the cadastral rental value of the premises used.

Key points for international operators:

• A company using a domiciliation address (registered office only, no physical activity) may owe a minimum CFE based on turnover brackets set by the local municipality.
• The first year of activity is fully exempt from CFE.
• The CFE amount is set by the local authority (commune or intercommunalité) and therefore varies significantly by location. Amounts should be confirmed via the professional tax account on impots.gouv.fr.

The cotisation sur la valeur ajoutée des entreprises (CVAE) has been under phased elimination. The 2024 Finance Act scheduled its full removal, but subsequent legislative changes may have affected the timeline. Verify the current status on legifrance.gouv.fr before concluding that no CVAE obligation applies for 2026. If CVAE remains payable for your entity, the threshold was historically 500,000 € in annual turnover, with payments due in June and September.

The DSN replaced the previous system of multiple annual payroll declarations (DADS, attestations, Déclaration annuelle des données sociales) with a single monthly flow.

Filing deadlines#

• Companies with 50 or more employees: DSN due by the 5th of the following month.
• Companies with fewer than 50 employees: DSN due by the 15th of the following month.

What the DSN covers#

The DSN transmits URSSAF contributions, complementary pension contributions, death and disability insurance data, sickness and maternity information, and withholding tax data. It is mandatory from the first payslip.

A pattern we observe frequently in our practice: the DSN is filed on time but with contribution bases that do not match the payroll register. This mismatch generates URSSAF regularisation notices and can trigger audits covering several prior periods. Consistency between payroll records, accounting entries, and DSN data is a non-negotiable control point.

The Direction générale des finances publiques (DGFiP) uses automated cross-referencing tools to compare data across declarations. The most commonly flagged discrepancies are:

• A gap between VAT-declared turnover and the revenue figure in the annual tax return.
• A gap between DSN contribution bases and payroll costs in the accounts.
• Dividends or director withdrawals that are inconsistent with the equity movements shown in the balance sheet.

For companies with related-party transactions, intercompany pricing documentation (dossier de prix de transfert) is a separate but increasingly scrutinised area, particularly for subsidiaries of foreign groups.

Underestimating the filing scope. A French subsidiary with minimal activity still owes CFE if it has premises, DSN if it employs one person, and a liasse fiscale every year even with a zero result. Low activity does not mean low compliance requirement.

Missing the liasse fiscale deadline. Late filing of the annual return triggers late payment penalties (ranging from 10% to 40% depending on circumstances — verify current rates on legifrance.gouv.fr) and can attract the attention of the local tax office (Service des impôts des entreprises, SIE). The deadline for a 31 December year-end is typically in mid-May.

Threshold crossings not monitored. Moving from franchise en base to the régime réel mid-year, or from régime simplifié to régime réel normal, requires immediate adjustment to invoicing and declaration frequency. These transitions are manageable with advance planning but disruptive when identified late.

• Confirm the accounting period is closed and all invoices for the period are posted.
• Reconcile the VAT base in the accounting system with the draft declaration figure.
• Check for any intra-EU transactions requiring separate reporting.
• Verify the instalment amount against the most recent IS payment confirmation.
• Save the electronic acknowledgement of receipt (accusé de réception) for every filing.
• Update the internal tracking table of remaining instalments and upcoming deadlines.

For entities already working with an expert-comptable, the engagement letter (lettre de mission) should specify which declarations are included in the scope. Declarations not listed remain the responsibility of the company.

Situations that warrant early involvement:

• Setting up a new French entity, regardless of expected activity level.
• First employee or first intra-EU transaction.
• Crossing a VAT or IS threshold that changes the applicable regime.
• Receiving any correspondence from the DGFiP or URSSAF.
• Restructuring, merger, or change of legal form.

Current as of 2026-05-25. This article provides general information on French tax filing obligations and does not replace professional advice tailored to your specific situation, documents, and applicable law. Consult a qualified expert-comptable or refer to impots.gouv.fr for decisions with legal or financial consequences.