Disclaimer: This article is for general information only and does not constitute legal, tax, or financial advice. French non-resident tax filing is technical; deadlines, form numbers, and indexed thresholds are updated annually, and the consequences of misfiling are concrete. Verify every claim below against the current pages of impots.gouv.fr and the published 2026 calendar before acting, and consult a qualified professional. The English Investor accepts no liability for decisions taken on the basis of this article.
An American banker in New York opens his post on 5 June and finds a letter from the Service des Impôts des Particuliers Non-Résidents in Noisy-le-Grand. The letter notes that his 2025 French rental income has not yet been declared. The deadline was 21 May. A 10% surcharge has applied automatically. Interest at 0.20% per month is running. If a formal mise en demeure follows and he still does not file within 30 days, the surcharge becomes 40%.
His American CPA had been busy with the 15 April US filing. Nobody had told the banker that his French return — for the small Paris flat he had let furnished since 2018 — was due in May, that it lived on a different form than his US 1040, or that the boxes mattered.
This is the article we would have wanted him to read in early May. Not a step-by-step filing manual — those exist on impots.gouv.fr directly, in better French than ours, with the current screenshots. Rather, the structural map: who has to file, by when, on which forms, with which boxes that matter most to a foreign property owner, and the mistakes that catch readers out most reliably. The deadlines below are for the 2026 declaration of 2025 income. The form numbers and box references are valid as we publish, but should be cross-checked against the live forms each year; impots.gouv.fr renumbers boxes between editions, and any specific box reference is worth a sanity check against the current paper formulaire or the online platform’s labelling before you click Valider.
Who actually has to file
French income tax for individuals reaches non-residents through article 4 A of the Code général des impôts: a person whose tax domicile is outside France is taxable only on French-source income. For a foreign owner of French property, the most common categories of French-source income are rental income (whether the property is let unfurnished as a revenu foncier or furnished as a BIC under the LMNP / LMP régime), capital gains on sale of the property, and any French-source dividends if the property is held through a French SCI that has opted for corporate tax.
Whether you are a “non-resident” is decided by article 4 B CGI — habitual abode in France, principal place of professional activity in France, or centre of economic interests in France — and then overridden, in the cross-border case, by the tiebreaker articles of any applicable double-tax treaty. Physical presence in France is one factor in the article 4 B analysis, but it is a different test from the immigration-side 90/180 Schengen rule: you can be fully Schengen-compliant and still cross into tax residence if your economic centre shifts to France, and you can be tax-resident in France without ever quite hitting the Schengen ceiling. Treat them as parallel rather than nested.
If your French-source income for the year is zero — you owned a flat that you used yourself, did not let it, and did not sell it — there is generally no income return to file. You may still be exposed to taxe foncière on the property itself (a local tax billed separately, not on the income return) and, if the property is a secondary residence, to the taxe d’habitation surtax in the communes that levy it. For everything else — rental, sale, French-source dividends — a non-resident return is in scope.
The May deadlines that matter
For the 2026 declaration of 2025 income, Bercy’s published calendar puts the non-resident deadlines in the second half of May. Paper returns must be sent by Tuesday 19 May 2026 (the postmark is the proof of date). Online returns for non-residents are due by Thursday 21 May 2026 at 23:59 Paris time. The online deadline applies whatever your country of residence; there is no zone-by-zone split for non-residents the way there is for residents.
Missing the deadline is not a procedural footnote. Under articles 1727 and 1728 of the CGI, the consequences begin the day after.
| Status | Consequence | |
|---|---|---|
| Filed late, no mise en demeure received | 10% surcharge applied automatically to the assessed tax | |
| Filed within 30 days of mise en demeure | 10% surcharge applied (no escalation) | |
| Not filed within 30 days of mise en demeure | 40% surcharge applied | |
| Late payment of the assessed tax | 0.20% per month intérêt de retard (≈ 2.4% annualised) until paid | |
| Voluntary amended return before any audit | Intérêt de retard reduced by 50% (article 1727 V CGI, droit à l’erreur) | |
| The single most expensive mistake | Ignoring the mise en demeure. The escalation from 10% to 40% on the assessed tax is automatic and not negotiable. | |
Two practical points. First, if you owe French tax in addition to the surcharge, you also receive an avis d’imposition in the autumn with a payment deadline of its own — typically September — and missing that deadline triggers the same monthly interest. Second, the surcharges and interest are on the French income tax; they do not affect the social charges (CSG/CRDS/prélèvement de solidarité) which run on a separate liquidation schedule.
Which form maps to which situation
For most foreign owners the filing is one or two forms, not a stack. The right map depends on whether the property is let unfurnished, let furnished, or sold during the year.
Form 2042 is the main income-tax return. Every non-resident filer uses it; it is the spine onto which everything else attaches.
Form 2042-C is the complementary return. This is where the CSG/CRDS solidarity-only election lives — the section 8 (“Divers”) boxes that EU/EEA, UK and Swiss residents use to claim the 7.5% solidarity levy in place of the full social-charge stack. We come back to those boxes in the next section.
Form 2042-C-PRO is the complementary return used for business and professional income, including bénéfices industriels et commerciaux (BIC). Furnished-rental income — LMNP or LMP — is BIC and is declared on 2042-C-PRO, whether the taxpayer is under the micro-BIC simplified regime or the régime réel. The figures from a régime-réel LMNP filing are computed on a separate declarative annex.
Form 2044 is the foncier return for unfurnished property let at the régime réel. If you let an unfurnished flat to a long-term tenant and your annual gross receipts exceed the micro-foncier ceiling (€15,000 per the standing rule), or if you have elected for the régime réel even below the ceiling, 2044 is where the actual rental accounts go before the result flows onto form 2042. A separate variant — form 2044 SPÉCIALE — applies if your foncier income includes property let under one of the historical amortisation-deduction regimes (Borloo neuf, Robien classique or recentré, Périssol, and similar) or if the property is held through certain SCI / FPI structures with amortisation elections; if neither situation applies, the standard 2044 is the right form.
Form 2031 is the declarative annex for taxpayers under the BIC régime réel — applicable to LMNP and LMP filers who have opted out of micro-BIC. The form itself is a business return; the resulting profit or loss flows onto 2042-C-PRO. If you are a micro-BIC filer for furnished rental, form 2031 does not apply to you.
Form 2042-NR is frequently misunderstood. It is not a general non-resident return. It is a complementary return for the transitional year in which a taxpayer has either left France or returned to France during the year, and needs to declare the period of non-residence separately from the period of residence. A steady-state non-resident — someone who has been non-resident for years and is filing French rental income for the third or eighth year in a row — does not use 2042-NR; they file form 2042 and any applicable annexes. The 2042-NR is for the year of relocation only.
If the property was sold during the year, the immediate capital-gains tax has typically already been paid at the notarial office under the prélèvement régime of article 244 bis A CGI — the notaire withholds and remits the tax on the day of the acte. The transaction still appears on the annual return for completeness, but the heavy lifting has happened at the closing table, not on the May filing.
The two boxes that matter most to UK and EEA owners — 8SH and 8SI
The single most consequential annual decision for many UK and European non-resident owners is whether they qualify for the solidarity-only social-levy carve-out. Under the established interpretation of the EU-UK Trade and Cooperation Agreement (Article SSC.3) and the equivalent EU coordination rules for EEA and Swiss residents, an owner who is affiliated to social security in the UK, the EEA or Switzerland — and who is not under a French mandatory regime — is exempt from CSG and CRDS on French capital and rental income. They remain liable for the prélèvement de solidarité at 7.5% only, rather than the full social-charge stack.
The election is made by checking box 8SH (for the principal taxpayer) and, where applicable, box 8SI (for the spouse or partner of a joint return) in the “Divers” section of form 2042-C. The substantive condition is supporting paperwork: HMRC’s A1 or S1 form, or the equivalent E101/A1 from your home country’s social-security authority, evidencing affiliation outside France. Keep the document with your filing file; the French tax office may request it on review.
Failing to check the box is the single most common avoidable error we see for cross-border owners. On a moderate Paris rental, the difference between the full social-charge stack and the 7.5% solidarity-only rate runs into the thousand-euro range every year; over a typical holding period, that compounds into a number worth doing the paperwork for. The mechanics and the wider stack of 2026 social-charge changes are walked through in our dedicated article on the 7.5% solidarity carve-out; this article focuses only on the filing-time consequence.
The micro-BIC vs régime réel choice for furnished rental — and the 2025 reform
Furnished rental income (LMNP or LMP) is taxed in the BIC category. The taxpayer chooses between two computational régimes — the simplified micro-BIC (a flat-rate abattement applied to gross receipts) and the régime réel (full accounts, depreciation of the building, deduction of charges). The choice is structural; once made it is sticky.
The Loi Le Meur reform, codified in the Loi de Finances for 2024 and refined in the LF for 2025, changed the micro-BIC ceilings and abattements in ways that affect the 2026 declaration of 2025 income. The reform sharpened the tax distinction between long-term furnished rental (and properly classified tourism rentals) and unclassified short-term tourism rental — the regulatory home of most Airbnb-style activity.
| Activity | Annual revenue ceiling (micro-BIC) | Forfait abattement |
|---|---|---|
| Long-term furnished rental (location meublée de longue durée) — the standard LMNP case | €77,700 | 50% |
| Classified meublé de tourisme (classement étoiles) + chambres d’hôte | €77,700 | 50% |
| Non-classified meublé de tourisme — typical Airbnb without a classement | €15,000 | 30% |
| Practical implication | Unclassified short-term tourism rental lost most of its micro-BIC advantage. For any non-classified activity above €15,000 of gross receipts a year, the régime réel is now the default, with the full filing complexity that implies. | |
The régime réel allows depreciation of the building over its useful life (typically 25–30 years on the structural component, with separate schedules for fixtures and furnishings), full deduction of operating expenses, deduction of interest on any acquisition loan, and a 10-year carry-forward of any operating deficit against future LMNP profits. It is meaningfully more favourable than micro-BIC on most properties — particularly during the depreciation-heavy early years — at the cost of needing a proper expert-comptable to file the 2031 annex and the supporting bilan.
The LMP / LMNP split — the €23,000 receipts threshold under article 155 IV CGI — still applies. For the 2026 declaration (covering 2025 income), the pre-reform comparator is in scope: only French-source other income of the foyer fiscal is measured against rental income. From 1 January 2026 onwards — affecting the 2027 declaration of 2026 income — foreign income subject to an equivalent income tax in the residence state will be counted as well, pushing most foreign owners out of LMP and back into LMNP. The mechanics of that prospective shift, and the CGT consequences, are walked through in our LMP non-resident reform article.
The non-resident minimum tax rate, and when the average-rate alternative is worth claiming
Non-residents are taxed on French-source income at the standard barème — except that the resulting tax cannot be lower than the non-resident minimum rate under article 197 A CGI. For income earned in 2025 (declared in 2026), the minimum rates are 20% on the portion of net taxable income up to €29,579 and 30% on the portion above that threshold. The threshold corresponds to the upper bound of the second bracket of the barème and is reindexed in each Loi de Finances; the figure is correct for the 2026 declaration but is worth re-checking against the current impots.gouv.fr page each year.
The 20% / 30% structure is a floor. If the taxpayer can demonstrate that the effective rate of French tax on their global income — French and foreign combined — would be lower than the minimum, the lower taux moyen can be elected. The election is made by reporting worldwide income on the supporting form 2041 TM (telecharged from impots.gouv.fr) and entering the resulting figure in box 8TM of form 2042-C. The taxpayer’s worldwide-income disclosure is the price of the election. For a non-resident with substantial French rental income and modest other earnings, the minimum rate can be heavier than the proper barème result; the taux moyen election can be worth the additional disclosure. For a non-resident with significant foreign income and modest French rental, the minimum rate is typically already lower than the average-rate result and the election adds nothing.
IFI: when wealth tax on French real estate enters the conversation
The Impôt sur la Fortune Immobilière (IFI), the French wealth tax on real estate, is filed together with the income return. For a non-resident, the threshold is reached when the net taxable value of French real estate at 1 January 2026 exceeds €1,300,000. Non-residents are subject to IFI only on real estate situated in France — not on worldwide real estate — but the threshold is the same as for residents, and a single Paris apartment can comfortably cross it.
The declaration is made on form 2042-IFI, filed at the same time as the income return: paper by 19 May 2026, online by 21 May 2026 for non-residents. Box ØIF on the first page of form 2042 must be ticked to signal that an IFI return is being filed alongside. A taxpayer who has no income to declare but is subject to IFI files form 2042-IFI-COV, a streamlined IFI-only variant.
The IFI is a separate calculation with its own valuation rules, deductible debts, and reductions; this article does not attempt to summarise it. The point for filing season is that the IFI return is part of the May calendar, not a separate exercise, and missing it carries the same surcharge and interest regime as missing the income return. Any non-resident owner whose French property would clear the €1.3 million net threshold should engage a French tax adviser well before May to assemble the valuation file.
The five most common non-resident filing mistakes
The mistakes we see most often, from a cross-border practice perspective, are predictable and avoidable.
Missing the May deadline because the home-country tax cycle dominates. American filers anchored to the 15 April US deadline, British filers anchored to the HMRC self-assessment cycle, and many others lose track of the French May calendar. Diary the French dates separately. A 10% surcharge on a €4,000 French tax bill is €400; it is also the easiest €400 to avoid on this list.
Forgetting the 8SH / 8SI box. The CSG/CRDS solidarity-only carve-out has to be claimed every year on form 2042-C. It does not roll forward from prior returns. Owners who claimed it in 2024 and forget in 2026 lose the difference and recover it only by filing a réclamation after the avis arrives.
Using form 2042-NR in a steady-state year. The 2042-NR is for the transitional year of arrival or departure. Owners who keep filing 2042-NR every year out of habit are using the wrong form; the steady-state non-resident files 2042 plus the relevant complementary annexes.
Mis-applying the micro-BIC abattement after the 2025 reform. Owners of short-term tourism rentals without a classement who continue to apply the 50% abattement from prior years are over-stating their deductions; for non-classified tourism rental the abattement dropped to 30% and the ceiling to €15,000 of annual receipts. Re-check the classement status of the property and the relevant figures before filling in 2042-C-PRO.
Not requesting the taux moyen when it would help. The election is on the return; if you do not request it, you do not get it. For non-residents whose global income is modest, the average-rate computation can save several hundred euros a year over the minimum rate.
The honest closing position
French non-resident tax filing is technical, the forms move between editions, and the consequences of mistakes are concrete. This article describes the structure as it applied to the 2026 declaration of 2025 income; some specifics — most notably the box numbers and the indexed thresholds — change each year and should be cross-checked against the current impots.gouv.fr pages and the current paper formulaires before any decision is taken. For anything beyond the simplest filings, the cost of an hour with a French expert-comptable or fiscaliste who handles cross-border files routinely is reliably lower than the cost of getting it wrong.
For the wider cross-border picture in which the May filing sits — entry rules, the LMNP régime mechanics, the CGT treatment on sale, the all-in cost of holding a French property, and for US persons specifically the parallel IRS reporting stack — the May return is one component of a longer planning conversation. Done properly, it is also a chance to lock in the carve-outs that meaningfully change after-tax yield.
Frequently asked questions
I had no French rental income in 2025 — do I still need to file?
Generally no income-tax return is required if you had no French-source income for the year. The property may still generate annual taxe foncière (and, if a secondary residence, the taxe d’habitation surtax in the relevant communes) — those are billed and paid separately from the income return.
Can I file my non-resident return online if I have never had a French numéro fiscal?
You need a French tax identification number to access the impots.gouv.fr online filing portal. The first French return — typically the year you start letting the property — has to be filed on paper, and the numéro fiscal is allocated in response. From the second year onwards, online filing is generally available. For owners filing for the first time, a paper return well before the 19 May deadline is the safer route.
What if I missed the May deadline?
File as soon as possible. Until a mise en demeure arrives from the tax authority, the surcharge is 10%; if you file within 30 days of receiving a mise en demeure, the 10% surcharge holds; only if you fail to file within those 30 days does the surcharge escalate to 40%. Interest at 0.20% per month also runs from the missed deadline until the eventual payment. The droit à l’erreur (good-faith correction) regime can halve the interest if you file a voluntary amended return before any audit, provided the omission is not deliberate.
Do I declare the rental as foncier or as BIC?
The distinction is mechanical: an unfurnished long-term let is foncier (declared on form 2044 if at the régime réel, or on form 2042 directly if at the micro-foncier); a furnished let — whether long-term or short-term tourism — is BIC under the LMNP / LMP régime and declared on form 2042-C-PRO (with form 2031 in the régime réel case). A “meublé” with the actual furniture list specified by the décret of 31 July 2015 is the substantive test for “furnished” status.
Do I need a French bank account to pay the tax?
Not strictly — the impots.gouv.fr portal accepts payment from SEPA-zone bank accounts in any euro-denominated currency, and many non-residents pay from their home-country euro account. For a non-resident with a recurring French rental, a small French account often makes the cash flow simpler (gestion locative, taxe foncière, syndic charges) but it is not a filing requirement.
The form numbers in my software are different from the ones in this article — who is right?
The official formulaires on impots.gouv.fr are the authoritative reference. Form numbers change rarely (2042, 2042-C, 2042-C-PRO, 2044, 2031 have been stable for years) but box numbers within each form change between editions. If a third-party software or older guide refers to a different box, cross-check against the current paper formulaire downloadable from impots.gouv.fr before relying on it.
