Outsourced French tax return filing 2026: complete guide

Quick answer. Outsourcing the filing of the French tax return (liasse fiscale) in 2026 means entrusting an authorised provider — a chartered accountant registered with the Ordre, an OGA, an AGA or an OMGA — with the final tax review and the EDI-TDFC electronic transmission to the French tax authority (DGFiP). For a financial year ending 31 December 2025, the practical deadline is Wednesday 20 May 2026 (statutory deadline of 5 May 2026 + the 15 calendar-day electronic filing grace period, BOI-BIC-DECLA-30-60-30 § 60). Typical fee range observed in the Paris region: EUR 1,200 to EUR 6,000 excl. VAT per financial year, depending on the size of the file, excluding the optional ECF (tax compliance review) engagement.

The annual statement of results remains the most structuring tax act in the life of a French company. In 2026, more than 99% of companies subject to corporate income tax (IS), industrial and commercial profits (BIC) or non-commercial profits (BNC) file it with the DGFiP through EDI-TDFC (via an accredited EDI partner) or EFI (the professional area on impots.gouv.fr). Paper filing has almost disappeared for professional taxpayers.

Three concrete developments make the outsourcing question more strategic than before:

• the rollout of mandatory e-invoicing (mandatory receipt from 1 September 2026 for all French companies) means VAT and the FEC (chart-of-accounts journal file) must be tightened upstream of the tax return;
• the gradual removal of OGA/AGA-linked advantages (end of the 25% taxable profit uplift for non-members since 2023, and the phase-out of partial deductibility of bookkeeping fees from 2026) is reshaping the trade-off between an OGA and a chartered accountant;
• mounting budget pressure on the French State is driving more targeted audits on form 2065 and form 2031 filings, particularly in the Île-de-France region.

At Hayot Expertise, we support around forty TPE/PME directors each year during the TDFC filing season. We observe that the most costly confusion is not the deadline itself but the gap between the accounting closing date set by management, the tax review date set by the provider, and the acknowledgement-of-receipt date without rejection issued by the DGFiP. Outsourcing first and foremost serves to sequence these three milestones without last-minute back-and-forth.

"Outsourced filing" refers to a contractual engagement entrusted to an authorised third party. That third party takes over the tax chain downstream of internal accounting — often as early as the pre-closing phase — and bears the technical responsibility for the EDI-TDFC transmission.

Three legal sources frame this engagement:

• Article 53 A of the French Tax Code (CGI) (BIC companies under the real regime) and equivalent articles for IS, BNC and SCI under personal income tax — annual statement-of-results obligation;
• Article 1649 quater B quater of the CGI and BOI-BIC-DECLA-30-60-30 — general obligation to e-file for professional taxpayers;
• Professional Standard NP 2300 of the Ordre des experts-comptables — framework for the "presentation of annual accounts" engagement, frequently bundled with the tax return.

A well-scoped outsourced filing engagement therefore produces three deliverables: a documented review file, a validated tax return (forms + mandatory annexes), and an electronic transmission certificate (EDI-TDFC acknowledgement of receipt without rejection).

What outsourcing is not#

• A pure "push-button" transmission service: if the provider only pushes a file, its liability is limited and the added value is low.
• A substitute for a statutory auditor (CAC): the CAC remains mandatory above the legal thresholds and issues a separate opinion.
• A guarantee against any tax audit: only an examen de conformité fiscale (ECF) opens an enforceable presumption of good faith within the meaning of article L. 80 B 9° of the French Book of Tax Procedures (LPF).

The outsourcing market is segmented. The table below summarises the four families of providers and their typical scope.

The EDI partner is a technical actor: it ensures the file complies with the TDFC schema and is transported to the DGFiP. All chartered accountants and OGAs work with one or several EDI partners; some software vendors (Pennylane, Cegid, Sage, ACD, MyUnisoft) embed their own accredited EDI channel.

The engagement is structured in five operational stages, running over 4 to 10 weeks for an SME with EUR 1 to 20 million in turnover.

1. Scoping and engagement letter. Scope (financial year, entity, expected forms), pre-closing calendar, list of supporting documents, fixed fee or time-based billing.
2. Collection of structuring documents. General trial balance, general ledger, FEC in the standardised format (article A. 47 A-1 of the LPF, order of 29 July 2013), CA3/CA12 VAT returns, annual DSN payroll filings, key contracts, fixed-asset schedules.
3. Tax review. Application of professional standard NP 2300 and core checks: bank reconciliations, suspense accounts, mixed expenses, deductible/collected VAT, provisions, accrued expenses, partner current accounts, transfer pricing where applicable.
4. Tax return production and interim debrief. Drafting of the forms (2065 IS, 2031 BIC, 2035 BNC, 2072 SCI), documented extra-accounting restatements, milestone review with management on key choices and sign-off.
5. EDI-TDFC transmission and archiving. Submission of the flow via the EDI partner, monitoring of technical acknowledgements (ART) then functional acknowledgements (ARF), archiving of the transmission certificate and audit trail.

Documents you should prepare#

• general trial balance and general ledger for the financial year;
• FEC in the standardised format;
• bank statements and reconciliation schedules;
• VAT returns (CA3 or CA12) and VAT reconciliation schedules for the year;
• consolidated annual DSN filings and payroll reports;
• fixed-asset and depreciation schedules;
• sensitive contracts (leases, intragroup service agreements, executive compensation, treasury agreements).

To align your reverse planning with other milestones, see our guides on the 2026 tax deadlines, the 2026 tax return filing deadline and the length of the accounting financial year. Our deep-dive on VAT for SMEs in 2026 covers the CA3/CA12 block, and our FEC article details the standardised format expected by the DGFiP.

Fees depend on the regime, the size of the file and the scope entrusted (bookkeeping + return, or return only). As an indication, in the Paris region in spring 2026:

These ranges exclude the ECF engagement (an additional EUR 1,500 to 3,500 excl. VAT for a standard SME) and exceptional engagements (restructurings, transfer pricing, R&D tax credit CIR/CII, tax memo on a non-recurring transaction). For specific transactions, see our tax memento and our deep-dive on tax optimisation via a holding company.

BNC self-employed professionals registered with an AGA#

Joining an AGA still has residual value for self-employed professionals in 2026 — production of the prevention/advisory document, access to industry statistics, simplification of e-filing — but the former major tax benefit (no 25% uplift on taxable profit) was removed in 2023. As a result, a self-employed professional already supported by a chartered accountant authorised to grant the tax visa generally no longer has any interest in joining an AGA in addition to the firm. The membership fee (EUR 200 to 400 excl. VAT per year) becomes an unjustified duplication.

Transitioning from micro-BIC to the simplified real regime#

A TPE that exceeds the micro-BIC thresholds (EUR 188,700 for sales of goods, EUR 77,700 for services in 2026) switches to the real regime and must file a form 2031. The first return requires meaningful opening-balance-sheet work (reintroducing inventories, fixed assets, work in progress) which clearly justifies outsourcing. Budget at least + 30% in fees on the first transition financial year.

Holdings and IS tax-consolidated groups#

For a tax-consolidated group within the meaning of articles 223 A et seq. of the CGI, the return is built by legal entity and then consolidated at the head-of-group level (forms 2058 ER, 2058 ES, 2058 FC). Outsourcing is here virtually unavoidable: the consistency of intragroup eliminations, restatements and loss carryforwards demands dedicated expertise. Budget per entity, plus a tax consolidation engagement at holding level.

SCI under personal income tax (IR) and real estate holdings#

Translucent SCIs subject to IR file a form 2072. The review focuses on depreciation (only in LMNP / SCI subject to IS), deductible property expenses, and the allocation of results between members. Outsourcing remains relevant as soon as the structure holds several lots, outstanding loans, or non-resident members.

Mixed VAT activities or intra-EU flows#

For companies with a partial VAT deduction ratio, single-VAT-group status, or significant EU flows, the VAT review takes 30 to 50% more time. It is also the area that concentrates the bulk of adjustments observed in tax audits. Our guide on the tax identification number and intra-EU VAT lists the upstream checks.

• Confusing transmission with review. A EUR 99 excl. VAT platform transmits a file; it does not check the consistency of the tax result, does not challenge a provision, and does not secure a partner current account.
• Starting the engagement after the final closing. The right moment is the pre-closing (4 to 6 weeks before the closing date), not 15 May. A return built in a rush stacks EDI rejections and missing annexes.
• Forgetting mandatory annexes. Tables 2058 A (reconciliation from accounting to tax result), 2059 (capital gains), 2065 bis (subsidiaries and shareholdings): a filing without a complete annex set exposes the company to an information request under article L. 10 of the LPF.
• Outsourcing to a non-authorised provider. Check the registration with the Ordre (chartered accountant, verifiable number on experts-comptables.fr) or the official accreditation (AGA, OGA, OMGA listed on impots.gouv.fr).
• Confusing OGA and chartered accountant. An OGA does not keep the books: it verifies the consistency of its members' filings and issues an engagement report, but it does not carry the same professional liability insurance as a chartered accounting firm.
• Missing the 15-day e-filing grace period. The 15 calendar-day tolerance (BOI-BIC-DECLA-30-60-30 § 60) applies only to the statement of results and its annexes — not to the IS payment, which follows its own calendar (article 1668 of the CGI).

Recently, the director of a Paris-region industrial SME with EUR 8 million in turnover came to us after a first outsourced financial year handled by a low-cost provider for EUR 850 excl. VAT. The return was filed on time, indeed — but with an overestimated customer provision that was not documented, an unbalanced partner current account, and a 2058 A table built by automatic restatement without human review. The result: an information request under article L. 10 of the LPF within six months of filing, and ultimately a regularisation with EUR 1,200 of late-payment interest that could have been avoided.