French Tax Deadlines 2026: A Complete Calendar for British Property Owners

Disclaimer: This article is for informational purposes only and does not constitute financial, tax, or legal advice. The English Investor is not a regulated tax adviser. Rules, deadlines, and rates change — always confirm current figures with impots.gouv.fr or a qualified French tax professional before filing.

If you own a French property from the UK side of the Channel, spring is the season when France quietly reminds you that it would like some paperwork, please. Between mid-May and the end of June, non-resident owners face three potential filing deadlines — income tax, the déclaration d’occupation, and (if you’re lucky enough to need it) the wealth tax. Miss any of them and the Direction générale des finances publiques (DGFiP) has penalties ready to go.

This is a plain-English calendar of every French tax deadline a British property owner is likely to meet in 2026, what each one actually asks of you, and the handful of carve-outs that exist for UK residents specifically. Yesterday’s piece covered moving GBP to EUR for the purchase itself; this one picks up where the keys are already in your hand.

The 2026 Tax Calendar at a Glance

Here’s every date a non-resident British owner is likely to care about this year. We’ll unpack each one below.

Income Tax: The May Window Non-Residents Actually Care About

If your French property generates any rental income — furnished, unfurnished, long-term, short-term — you have a French income tax return to file. And even if it produces nothing (empty second home), you may still need to declare a nil return the year you buy, to set up your file with the Service des impôts des particuliers non-résidents (SIPNR) in Noisy-le-Grand.

The dates

France splits resident filers into three geographic zones, each with its own online deadline. Non-residents are bundled into Zone 1 for online filing. For 2026, the dates are:

• Paper return: 19 May 2026 at midnight (everyone, including non-residents)
• Online, Zone 1 + non-residents: 21 May 2026, 23h59
• Online, Zone 2 (départements 20–54): 28 May 2026
• Online, Zone 3 (départements 55–974, 976): 4 June 2026

The forms

Most non-resident British owners only ever touch two forms: the main return, form 2042, and — if they have rental income over the micro-foncier threshold — form 2044 for unfurnished rental (revenus fonciers). If the property is held through a French Société Civile Immobilière (SCI) taxed at the impôt sur le revenu (IR), the SCI files form 2072-S first, and you copy your share onto 2044. If you’re over the IFI threshold, add form 2042-IFI.

The rate you’ll actually pay

Non-residents face a minimum income tax rate that’s higher than the progressive scale starts. For 2025 income (declared in 2026), the minimum rate is 20% on the first €29,579 of French-source income, and 30% above that.

Crucially, you can elect the “taux moyen” on your return — asking the DGFiP to apply the progressive rate that would have applied if your worldwide income were taxed in France. If your total household income is modest, this is usually much better than the 20% floor. It’s opt-in: tick the right box on form 2042 and attach a summary of your worldwide income. France will work out which result is lower for you and apply it.

The 7.5% Carve-Out: Social Charges If You Live in the UK

On top of income tax, France charges prélèvements sociaux — what Brits would call social contributions — on French-source property income. The default rate is 17.2% (CSG 9.2% + CRDS 0.5% + prélèvement de solidarité 7.5%). But if you live in the UK and are affiliated to the UK social security system (NHS / National Insurance), you benefit from a post-Brexit carve-out that still exists in 2026: you pay only the 7.5% solidarity levy, with CSG and CRDS exempted.

The carve-out survived Brexit because of the EU–UK Withdrawal Agreement and subsequent French tax guidance (BOFiP), but it is not automatic. You need to:

1. Be affiliated to a compulsory UK social security scheme (in practice, this means paying National Insurance or being a UK state pensioner, not French URSSAF)
2. Not be at the charge of French social security
3. Tick box 8SH on form 2042 C (the complementary return filed alongside the main 2042) — and box 8SI for the second filer in a joint declaration, if applicable — to confirm your non-French affiliation and activate the reduced 7.5% rate

A quick heads-up on 2026: the Loi de financement de la sécurité sociale 2026 raised the CSG on capital income by 1.4 points, taking the general social-charges rate from 17.2% to 18.6% on some income streams. But — importantly for unfurnished landlords — the increase does not apply to revenus fonciers (long-term unfurnished rental) or to real estate capital gains. It does apply to LMNP furnished rental income and to financial investments.

Translation: if you rent your French flat on a standard unfurnished lease and you live in the UK, you still pay only 7.5% in social charges on that income in 2026. If you run it as a furnished holiday let (our LMNP guide covers the specifics), your rate moves to 18.6% — unless you still qualify for the UK carve-out, in which case you’re back at 7.5%.

The Déclaration d’Occupation: The Form Most Brits Can Now Skip

Since 2023, every French property owner — resident or not — has had an obligation to declare who occupies each of their properties (primary residence, secondary residence, rental, vacant) via the Gérer mes biens immobiliers (GMBI) portal on impots.gouv.fr. The 2023 launch was chaos. The 2026 version is, mercifully, much simpler.

The rule for 2026: you only need to re-declare if your occupancy situation changed between 2 January 2025 and 1 January 2026. If your flat’s status on 1 Jan 2026 is the same as it was on 1 Jan 2025 (same tenant, still empty, still your holiday home), you do nothing. The deadline, if you do need to file, is 30 June 2026.

Typical “changes” that trigger a re-declaration:

• You bought (or sold) a French property during 2025
• Your tenant moved out and a new one moved in
• You converted a rental into a secondary residence (or vice versa)
• The property went vacant

Penalty for missing the filing, when filing was required: €150 per property. The penalty was notionally in the rules from 2023 but enforcement was patchy; from 2026 the DGFiP has confirmed it will actually collect.

IFI: The Wealth Tax Most Brits Forget Exists

The Impôt sur la fortune immobilière (IFI) is France’s real estate wealth tax. Non-residents owe it on their French real estate only — but at the same thresholds and rates as residents.

• Threshold (unchanged for 2026): €1.3m net French real estate on 1 January 2026
• What counts: all your directly-held French property, plus the real-estate portion of any French SCI you own, minus mortgages and allowable debts
• Deadline: same as income tax — 21 May 2026 online for non-residents, 19 May paper
• Form: 2042-IFI, filed alongside (or instead of) your income tax return

Two things catch British owners out. First, the €1.3m trigger is on net value — mortgages still owing on 1 Jan 2026 are deductible, which is why financing even part of the purchase can keep you below the threshold. Our French mortgage guide for non-residents goes through the mechanics. Second, a 30% abatement applies to the value of a principal residence — but non-residents, by definition, don’t have a French principal residence, so they don’t get that abatement on any French property.

The Autumn Bills: Taxe Foncière & Taxe d’Habitation

Two property taxes are levied on the 1 January position each year. Non-residents pay both. The bills arrive in autumn — but it’s worth flagging them in spring, because many British owners don’t realise they can elect mensualisation (monthly direct debit) any time up to 15 December for the following year’s bill.

Taxe foncière (land tax)

Paid by the owner of the property on 1 January. Bills typically go online in the last week of August (with mensualisés seeing theirs a few weeks later, in mid-to-late September) — DGFiP confirms the exact dates each summer. In 2025, notices appeared on 28 August for non-mensualisés and 20 September for monthly-debit payers, and 2026 is expected to follow the same pattern. Payment deadlines:

• 15 October 2026 — last day if paying by cheque, cash, or wire (only allowed for bills ≤ €300)
• 20 October 2026 — last day for online payment or direct debit

For any taxe foncière over €300, dematerialised payment is mandatory. Since almost every Paris or Côte d’Azur second home blows past that, the 20 October date is the one to remember.

Taxe d’habitation on secondary residences (THRS)

Abolished for primary residences in 2023, but very much alive for secondary ones — which is most British-owned property. Bills arrive in October–November; typical payment deadline is mid-November.

And there’s the majoration: in zones tendues (tight housing markets), the local commune can vote a surtax of 5% to 60% on secondary-residence THRS. In 2025, 1,628 communes — nearly 44% of those eligible — applied the surtax, including most of central Paris (which is at the 60% ceiling). If your French property is in Paris, Nice, Cannes, Bordeaux, Lyon, or a couple of hundred other tense zones, expect the top-up. And check our Paris vacant property tax piece for what’s coming on that specific front in 2027.

Three Traps to Avoid

1. Assuming the UK self-assessment “covers it”

It doesn’t. Under Article 6 of the 2008 UK–France Double Taxation Convention, income from immovable property is taxable in the country where the property is located. France taxes first, and you declare the same income on your UK self-assessment with a foreign tax credit to avoid double taxation. If you’ve been quietly declaring French rent only in the UK, you’re behind on filings.

2. Forgetting to claim the taux moyen

The 20% / 30% non-resident minimum is just that — a minimum. If your worldwide income, run through France’s progressive scale, would give a lower rate, France will apply it instead. But only if you ask. Tick the box, attach the worldwide-income summary, and let them do the math.

3. Skipping the micro-foncier check

If your gross French rental income (unfurnished) is under €15,000 a year, you qualify for micro-foncier: a flat 30% deduction, no deductible expenses to track, no form 2044 to complete — just a line on form 2042. For many small British-owned pieds-à-terre that are let for part of the year, this is by far the simplest regime. Over €15,000, or if you want to deduct actual expenses (mortgage interest, repairs, syndic fees), you switch to régime réel and file form 2044.

FAQ

I only own an empty French flat and collect no rent. Do I still have to file anything in May?

Not necessarily. If you have no French-source income and no French tax file yet, there’s nothing to file. But the year you buy, opening a file with the SIPNR in Noisy-le-Grand is sensible — file a nil return so you exist in the system and future correspondence finds you. You’ll still receive taxe foncière and taxe d’habitation bills in the autumn regardless.

I filed my déclaration d’occupation in 2023. Do I need to do it again in 2026?

Only if something has changed since your last declaration. If your flat was empty in 2023 and is still empty; if the same tenant is still there; if it’s still your holiday home — you do nothing. If anything in the occupancy column has changed between 2 Jan 2025 and 1 Jan 2026, you have until 30 June 2026 to update GMBI, or face €150 per property.

Does the 7.5% social charge carve-out apply to capital gains if I sell?

Yes — the same UK-affiliation carve-out that gets you to 7.5% on rental income also applies to the social charges portion of plus-values immobilières when you sell. You still owe 19% income tax on the gain on top (before any available abatements for holding period), but the social charges component drops from 17.2% to 7.5% if you qualify.

My property is in an SCI. Who files what?

The SCI itself files form 2072-S first (assuming it’s taxed at IR, which is the default) to determine its rental result and each associate’s share. The SCI’s 2072-S deadline sits slightly ahead of the individual returns: le deuxième jour ouvré suivant le 1er mai for paper (5 May in 2026), with online filers getting 15 extra days (20 May 2026). Each associate then reports their share on form 2044, which feeds into their personal 2042, on the standard May window — 19 May paper, 21 May online for non-residents. In practice, the SCI’s return has to be done first so the associate knows what to copy across.

Will my French SCI show up on my UK tax return?

Yes, but the treatment is messier than its French classification suggests. HMRC’s approach to a French SCI is not perfectly symmetric with France’s: for income-tax purposes, rental profits typically pass through to UK shareholders as foreign property income, with a foreign tax credit for French tax paid. For capital-gains purposes, however, HMRC has historically treated the SCI as opaque — which creates a well-known credit-mismatch headache when you sell, because the French CGT is levied on you as an individual while HMRC may see the SCI as the seller. SCI à l’IS is different again and is closer to a corporate entity for UK purposes. This is one area where a cross-border accountant is worth every penny of the fee.

Is the Paris secondary-residence surtax really 60%?

Yes. The Conseil de Paris voted the maximum 60% majoration on the taxe d’habitation on secondary residences by délibération of 31 January 2017, and it has remained in effect every year since — including 2026. For a flat whose base THRS is, say, €1,200, the majoration adds €720, for a total of €1,920 on top of taxe foncière. And note that this is before the 2027 doubling of the vacant-property tax rate for properties left empty — our piece on that change is here.

The Bottom Line

The French spring tax season looks intimidating on paper — three possible declarations, a dozen form numbers, and a double-tax treaty to navigate. In practice, for most non-resident British owners it condenses to three things: a May income tax return, a one-line check on whether the déclaration d’occupation is needed, and an autumn diary entry for the taxe foncière and taxe d’habitation. Nail those, claim the 7.5% social charges carve-out if you qualify, elect the taux moyen if it helps you, and you’ve done 95% of what the DGFiP expects.

If you’re earlier in the journey — still weighing whether to buy, or in the middle of the purchase — the rest of the series builds out the full picture: the step-by-step buying guide, moving GBP to EUR, French inheritance law, and managing the property remotely.