What is a French tax return package (liasse fiscale)? 2026 guide

Every year, companies operating in France under a standard tax regime must submit a formal tax filing package to the French tax authority (Direction Générale des Finances Publiques). This package is called the liasse fiscale. For non-French directors, holding company boards, or international groups with a French subsidiary, the concept can be opaque. This guide explains what the liasse fiscale contains, which forms apply depending on the tax regime, how French taxable profit differs from accounting profit, and what penalties apply if the filing is late or incomplete.

All figures, thresholds and deadlines below relate to financial years ending 31 December 2025, with filing due in 2026.

The liasse fiscale is the full set of standardised forms — a main tax result declaration plus supporting schedules — that a company subject to a real (réel) tax regime submits annually to the French tax authority to determine its taxable income. For financial years ending 31 December 2025, the electronic filing deadline is 20 May 2026. Without a filed liasse fiscale, the tax authority cannot assess the corporate tax due.

The liasse fiscale is not a single form. It is a structured filing dossier consisting of:

• A main declaration (the déclaration de résultat), which states the taxable profit or loss for the year after fiscal adjustments;
• A set of supporting schedules (tableaux annexes) that break down the balance sheet, income statement, fixed assets, provisions, tax credits, group relationships, and prior-year losses carried forward.

The filing must be submitted electronically, either through the EDI-TDFC system (via an approved accounting partner, accountant, or certified software) or through the company's online professional account on impots.gouv.fr (mode EFI). Paper filing is permitted only in exceptional, derogatory circumstances.

The liasse fiscale is distinct from the statutory accounts filed with the commercial court (greffe), from VAT returns, and from the payment of corporate tax. Each of these follows a separate calendar and separate forms.

Foreign directors often conflate these documents. The table below clarifies the distinctions under French law.

The statutory accounts go to the greffe and are publicly accessible. The liasse fiscale goes to the tax authority and is confidential between the company and the administration.

The form set depends on the company's tax regime and income category. Note that form numbers are French administrative codes and are not translated.

The thresholds are set for the 2026-2027-2028 three-year cycle under Article 302 septies A bis of the French Tax Code (Code général des impôts, CGI):

• €945,000 HT for sales of goods, on-site restaurant services, and accommodation (excluding classified tourist rentals);
• €286,000 HT for all other service activities.

Exceeding these thresholds triggers automatic reclassification to the standard regime, with the more detailed 2050-2059 schedules replacing the simplified 2033 series. A company may also voluntarily opt for the standard regime even below the thresholds.

Any company or individual trader subject to a réel (actual results) tax regime must file. This covers:

• Companies subject to corporate tax (IS): SA, SAS, SASU, SARL, EURL that has opted for IS, SCI subject to IS;
• Sole traders and partnerships subject to income tax in the BIC category under a réel regime;
• Liberal professions filing under the controlled declaration (BNC déclaration contrôlée);
• Farming businesses under a réel agricultural regime.

Auto-entrepreneurs (micro-entrepreneurs) do not file a liasse fiscale. The micro-BIC and micro-BNC regimes apply a flat-rate profit allowance to turnover. The individual files form 2042-C-PRO alongside their personal income tax return. No supporting schedules, no balance sheet annexes.

For international structures, an EURL whose sole shareholder is an individual and which has not opted for IS remains subject to personal income tax (BIC category) and must file a 2031-SD rather than a 2065-SD.

This is the least understood aspect of the liasse fiscale for non-French directors. French tax law and French accounting standards diverge on several points. The liasse fiscale reconciles them.

The formula: taxable profit = accounting profit + fiscal add-backs (réintégrations) − fiscal deductions (déductions extra-comptables).

Common add-backs increase the taxable base above accounting profit:

• Administrative fines and penalties (e.g. late payment fines imposed by public authorities);
• Non-deductible portion of the company vehicle tax (TVS);
• Business-entertainment expenses that exceed allowable limits;
• Provisions disallowed under French tax rules;
• Interest on shareholder current accounts above the legally deductible rate.

Common deductions reduce taxable profit below accounting profit:

• Parent-subsidiary dividend participation exemption (régime mère-fille): 95% of qualifying dividends received from French or EU subsidiaries are excluded, subject to a 5% add-back for expenses — the net quote-part de frais et charges deduction flows through the liasse;
• Long-term capital gains taxed at a reduced rate, reported separately;
• Certain qualifying tax-exempt income.

Worked example — French consulting SAS:

Corporate tax at 25% is assessed on €104,100, not on €100,000. The €4,100 difference means an additional €1,025 in tax. Each of these adjustments must be supported by documentation in the working file. For groups with French subsidiaries benefiting from the parent-subsidiary regime, these adjustments can be considerably larger.

For financial years ending 31 December 2025:

• 5 May 2026: legal deadline for paper filing (second working day after 1 May);
• 20 May 2026: deadline for electronic transmission via EDI-TDFC or EFI, which carries an additional 15 calendar days.

For companies with a financial year ending on a date other than 31 December, the filing must be submitted within three months of the year-end date.

Electronic filing is mandatory for all standard-regime companies under Article 1649 quater B quater CGI.

For full details on the 2026 calendar, interim payment deadlines, and how to request a deadline extension in exceptional circumstances, see the dedicated article: Date limite de dépôt de la liasse fiscale 2026.

Missing the deadline or filing on paper when electronic submission is mandatory carries specific financial penalties under French tax law.

Penalties for late or missing declaration (Article 1728 CGI):

Late interest (intérêts de retard) under Article 1727 CGI accrue at 0.20% per month on the tax due, calculated without deducting instalments already paid.

Penalty for non-electronic filing (Article 1738 CGI):

Where paper filing is used when electronic submission is required, a penalty of 0.2% of the tax due applies, with a minimum of €60 per declaration.

For a company with €200,000 of taxable profit and IS of €50,000, a 40% surcharge (where a formal notice was issued and ignored) amounts to €20,000, plus late interest. Timely filing is the most straightforward risk management measure available.

In practice, four issues account for the majority of errors seen when reviewing client files or taking over from a previous accountant.

1. Unreconciled accounts at filing date. Year-end accruals, deferred charges, and provisions calculated outside the accounting system create discrepancies between the trial balance and the liasse figures. These surface at audit or during a tax review.

2. Wrong regime applied. Companies that crossed the simplified-regime revenue thresholds during the year but continued filing with the 2033 schedules rather than the 2050-2059 schedules have filed incorrect declarations. A corrective filing is required, often with complications for refund claims.

3. Missing fiscal add-backs. Fines, excess shareholder loan interest, and disallowed provisions that are booked in the accounts but not reported as réintégrations in the liasse understate taxable profit. The tax authority can reassess within the standard three-year limitation period, plus late interest.

4. Confusing the filing deadline with the payment deadline. Filing the liasse fiscale by 20 May does not discharge the payment obligation. The corporate tax balance for a December year-end is due by 15 September. Instalment payments follow a separate schedule. For companies with complex cross-border tax positions, our French corporate tax team can help model both the filing and payment calendars in advance.

A well-prepared liasse fiscale is the output of a structured year-end process, not a last-minute exercise. The four steps we apply consistently in our closing engagements are:

1. Clean the accounting records before any fiscal work begins. Reconcile all third-party accounts, post accruals and provisions on documented calculations, and close the trial balance. No fiscal adjustment is reliable on an unreconciled accounting base.
2. Document every fiscal adjustment with a source reference. Each add-back and deduction entry in the liasse should trace back to a memo, a legal document, or a calculation worksheet retained in the permanent file.
3. Cross-review the liasse before transmission. A second reviewer checks consistency between the main declaration and supporting schedules, verifies prior-year carry-forwards, and confirms that the balance sheet totals reconcile.
4. Transmit early. EDI platforms can experience congestion in the final days before the 20 May deadline. Filing five to ten days early provides a safety margin to resolve any transmission error.

If your French subsidiary or French-registered company does not yet have a structured year-end process, our Paris accounting team can implement one with you before the next closing cycle.

Updated 26 May 2026. This article is for information purposes and does not constitute personalised advice. For your specific situation, consult a qualified French expert-comptable registered with the Ordre.