How to File Taxes in France 2026 as an Expat — impots.gouv.fr, Forms 2042 + 2047, Foreign Income, Step-by-Step Guide

France runs one of the most automated tax systems in the EU: salary income arrives at the impots.gouv.fr portal pre-filled via the prelevement a la source (PAS) monthly withholding regime, and most residents simply confirm the pre-filled declaration de revenus. For expats — Polish workers under EU free movement, posted workers, remote employees of foreign companies, freelancers on micro-entrepreneur regime — the complications start with the 2047 foreign-income annex, form 3916 for foreign bank accounts, the CSG/CRDS social surcharges on foreign capital income, and the quotient familial household-share system that differs from anything in Poland.

This 2026 guide walks through who must file in France, the forms, the e-filing process, deductions that benefit expats, foreign-asset declaration rules, double-taxation relief, and the avoidable mistakes that trigger 10% penalty surcharges.

Informational content, not tax advice. French tax errors carry penalties; consult an expert-comptable or avocat fiscaliste for complex cases.

TL;DR — 2026 Key Numbers

• Filing deadline (tax year 2025): late May to early June 2026, rolling by departement zone:
  • Zone 1 (depts 1-19 + non-residents): late May 2026.
  • Zone 2 (depts 20-54): early June 2026.
  • Zone 3 (depts 55-976): mid-June 2026.
  • Paper deadline (if no internet): around 20 May 2026.
• E-filing portal: impots.gouv.fr, mandatory for almost all residents (paper only allowed if you have no internet at home).
• Activation: create espace particulier with tax number (numero fiscal, 13 digits) + reference number from a prior assessment — first-time filers request both by post.
• Late-filing penalty (majoration): 10% automatic if no reminder, 20% if filed after a mise en demeure, 40% if 30 days after the formal notice, 80% if undeclared activity. Plus interets de retard at 0.20% per month.
• Average refund for expats: PAS withholding is calibrated yearly; most expat refunds come from deduction adjustments and range 400 EUR to 1,200 EUR.
• Personal allowance via quotient familial 2025: 1 part = adult; 0.5 part per first 2 children, 1 part from 3rd child; capped at 1,759 EUR per half-part for high earners.

Who Must File a French Tax Return as an Expat

You must file in France if you have a domicile fiscal in France during the tax year. Under Article 4 B of the Code general des impots, you are a French tax resident if any one of these applies:

• Your main home (foyer) is in France — where your spouse and children habitually live.
• Your principal stay (sejour principal) is in France, generally more than 183 days in the calendar year.
• Your main professional activity is in France (employee or self-employed, unless ancillary).
• The centre of your economic interests is in France.

Polish expats: the France-Poland DTT (signed 1975, currently being renegotiated) and EU mobility rules add tie-breakers — habitual abode, nationality, mutual agreement — when both states claim residency.

Just-arrived (<183 days) and left-mid-year cases

France splits the tax year on the date of arrival or departure. If you arrive 1 September, you are French resident from that date for income earned in France or abroad after arrival; Polish-source income before that date is generally NOT taxed in France, but stays on the Polish PIT-36 or PIT-37 return.

For mid-year departures, you file form 2042 + 2042-NR (non-resident) showing the split: resident half on standard bareme, non-resident half on French-source only.

Filing threshold

There is no income threshold below which you avoid filing: every French tax resident must file a declaration de revenus, even with zero income, because the assessment also unlocks family benefits (CAF), housing aid (APL), and the taxe d'habitation exemption for secondary homes.

Required Forms

Polish expats with a flat rented in Warsaw typically file 2042 + 2047 + 2044, and the rental income is exempt with credit-equal-to-French-tax method under the France-Poland DTT.

Step-by-Step E-Filing Process via impots.gouv.fr

Step 1 — Get your French tax number (numero fiscal)

First-time filers without a prior assessment must request the 13-digit numero fiscal:

• Visit your local Centre des Finances Publiques with passport + proof of address (lease, EDF bill).
• Or submit Formulaire 2043 online with scanned documents.

You receive the number within 4 to 8 weeks. With it, you can create the espace particulier online.

Step 2 — Confirm pre-filled data

Once in espace particulier, the system pre-fills:

• French employer wages (via the prelevement a la source monthly transmission).
• French pension income.
• French bank-interest reported under the Bulletin officiel des Finances Publiques declaration regime.
• Family situation from last year's return.

Check carefully — pre-filled does not mean correct. Common pre-fill errors: missing employer reports, wrong children count after a birth, incorrect quotient familial parts after a divorce.

Step 3 — Add foreign income on form 2047

Form 2047 is the single most important form for expats. Fill in:

• Frame 1: wages, pensions, scholarships from abroad — gross amount in EUR.
• Frame 2: rental income from foreign real estate.
• Frame 3: dividends and interest from foreign bank or broker.
• Frame 4: capital gains from foreign assets.
• Frame 5: royalties, business income, alimony.
• Frame 6: credit d'impot (foreign-tax credit) calculation.
• Frame 7: exoneration avec progressivite (exemption with progression) calculation.

Each frame produces totals that must be carried back to form 2042 (lines 1AF, 2DC, 4BL, 8TK, etc.). The portal does the carry-back automatically if you check the box "Importer dans 2042".

Step 4 — Declare foreign accounts on 3916

Every foreign bank account, e-money wallet (Revolut, Wise), foreign crypto exchange (Binance, Kraken), and foreign life-insurance contract requires a separate 3916 form. Required fields: account number, opening date, holder name, bank name and address, account type.

Penalty for omission: 1,500 EUR per account per year, or 10,000 EUR per account if the bank is in a non-cooperative jurisdiction. No threshold — even a 0.01 EUR Revolut wallet must be declared.

Step 5 — Validate and sign electronically

The portal runs a coherence check. Submit, and you get an accuse de reception PDF — keep it as proof of filing. The final assessment (avis d'impot) arrives in August or September 2026 in your espace particulier.

Deductions Many Expats Benefit From

• Forfaitaire 10% professional deduction — automatic on wages, capped at 14,171 EUR for 2025; or claim frais reels (actual costs) if higher.
• Childcare for children under 6 — 50% tax credit on costs up to 3,500 EUR per child per year.
• Donations to charities — 66% reduction up to 20% of taxable income.
• Energy renovation (MaPrimeRenov, CITE) — credit up to 30% of work, capped.
• Pension scheme contributions (PER) — fully deductible up to 10% of income (cap 35,194 EUR for 2025).
• Working from home — frais reels if you opt out of the 10% forfaitaire, claim actual electricity / internet / equipment.
• Relocation costs — generally not directly deductible in France, but moving for a new job can be partially offset under frais reels.
• Expert-comptable fees — deductible as frais reels for self-employed or BNC filers.
• Alimony paid to ex-spouse — fully deductible against income.

The 30% expat regime equivalent in France is the regime des impatries (Article 155 B CGI) — up to 50% income exemption for 8 years if recruited from abroad. Application is automatic via box 1AF on form 2042 plus dedicated worksheets.

Foreign-Asset Reporting

France does not have an annual wealth-asset declaration like Spain's Modelo 720 — but the 3916 form is similarly strict:

• Every foreign account held, opened, or closed during the year must appear.
• Crypto wallets on foreign platforms count (form 3916-bis since 2020).
• Foreign life-insurance contracts (assurance-vie) must be declared, including the surrender value.

Wealth tax IFI (Impot sur la fortune immobiliere) applies only to real-estate net worth above 1.3 million EUR — most expats are below this threshold.

Double-Taxation Treaty Relief

The France-Poland DTT (1975, undergoing renegotiation through 2026) typically allocates:

• Employment income — taxed in the country where work is performed.
• Real estate income — taxed where the property is located, exemption with progression in France (i.e. Polish rent boosts the French bracket but isn't directly taxed).
• Dividends — 15% withholding cap at source, credit method in residency.
• Interest — primary right to residency country with cap on source-state withholding.
• Pensions — private pensions taxed by residency, public pensions by paying state.

Paperwork to claim treaty benefits:

• French certificat de residence fiscale (form 5000 + 5001/5002/5003) — sent to Polish payer to reduce withholding at source.
• Polish CFR-1 certificate for the reverse case.

Common Gotchas

• Late filing penalty 10% — automatic for any filing past the departement deadline; rises to 40% if 30 days past mise en demeure.
• Missing 3916 — 1,500 EUR per account per year. Revolut and Wise count as foreign EME accounts.
• PAS rate mismatch — if you take a salary cut or move abroad mid-year, request modulation of the PAS rate or you over-pay all year.
• Foreign rental income forgotten — exempt-with-progression is still declarable; omission triggers an impose d'office with 40% surcharge.
• CSG/CRDS surcharges on capital income — 17.2% applies even to foreign dividends if you are French resident; reduced to 7.5% if you are affiliated with a non-French EU social-security system (form 2042-K + A1 form proof).
• Crypto omission — form 2086 for disposals + 3916-bis for wallets; the 30% PFU (prelevement forfaitaire unique) applies to most expats.
• Wrong FX conversion — use the Banque de France yearly average rate or the official rate of the payment date.
• Quotient familial cap — high earners hit the per-half-part cap at 1,759 EUR, reducing the benefit of children significantly.

Worked Example — Polish Expat in France 2025

Setup: Marek moved from Krakow to Lyon in March 2025, earning 50,000 EUR gross at a French employer, with a 10,000 EUR rental flat in Krakow paying 18% Polish withholding (1,800 EUR).

• French wage income: 50,000 EUR, pre-filled on 2042 line 1AJ.
• Forfaitaire 10% auto-deducted: -5,000 EUR.
• Net taxable wage: 45,000 EUR.
• Polish rent: 10,000 EUR, declared on 2047 frame 2, carried to 2042 line 8TK with exemption with progression.
• Foreign account: Polish bank account on form 3916, plus the Krakow flat on 2044 (regime reel) with depreciation, mortgage interest, repairs.
• Family quotient: 1 part single = 1.
• Tax calculation:
  • Progression rate calculated on (45,000 + 10,000) = 55,000 EUR taxable base -> rate ~ 19.2%.
  • Applied to French-only base 45,000 EUR -> ~ 8,640 EUR.
  • PAS already withheld during 2025: ~ 9,300 EUR -> refund ~ 660 EUR.

Forgetting form 3916 on the Polish account would cost 1,500 EUR penalty — wiping out the entire refund and more.

Polish Reader Angle — Coordinating with PL PIT-36

• PIT-36 + ZG annex — required for the months you were Polish tax resident or had Polish-source rental income.
• Ulga abolicyjna (1,360 PLN cap) — generally does NOT apply to France since the DTT uses exemption with progression for most income types.
• CFR-1 from Polish US — request it once you settle the residency switch; the French tax office accepts it as proof of prior Polish residency.
• A1 form (ZUS) — if you stay under Polish social security as a posted worker, attach A1 to French return to claim the 7.5% CSG/CRDS reduction instead of 17.2%.
• Coordinated deadlines — Poland 30 April 2026, France late May to mid-June 2026 — file PL first so you have your foreign-tax certificate ready for form 2047.

What To Do AFTER Filing

• Pay any balance — avis d'impot arrives August/September with payment options: direct debit single payment by 15 September, or 4 installments.
• Payment plan (delais de paiement) — request via espace particulier message, granted in case of financial hardship; typically 12 months at interets moratoires.
• Refund — usually transferred in July/August 2026, often before the avis d'impot arrives.
• Objection (reclamation) — within 31 December of the second year following the assessment.
• Audit-risk triggers — large foreign income with no foreign-tax credit, repeated frais reels claims, regime des impatries claims without recruitment proof, frequent residency moves, unreported crypto wallets matched by the DAC8 directive.

Tracking Foreign-Currency Income Across Countries

Reconciling EUR + PLN income, French prelevement a la source against Polish PIT-37 monthly advance payments, foreign-tax paid, CSG/CRDS at 7.5% vs 17.2%, and the impact on French quotient familial — all of it gets messy. Freenance lets you track foreign-currency income, tax already paid in source country, and a multi-country net-worth view including a Financial Freedom Runway that factors in after-tax cashflow under your residency country's rules. It does not file the return, but it keeps the EUR + PLN reconciliation organised for when you sit down with impots.gouv.fr.

FAQ

Q: Can I file myself or do I need an expert-comptable? A: For pre-filled French employment income and basic foreign rental, the impots.gouv.fr interface is workable in English (limited) — most salaried expats file solo. Hire an expert-comptable if you are micro-entrepreneur with > 30,000 EUR turnover, have regime des impatries exposure, or own foreign real estate with complex deductions.

Q: What if I am late filing? A: 10% automatic majoration if no formal reminder, 20% after mise en demeure, 40% after 30 days, 80% for undeclared activity. File anyway — these stack but don't avoid by hiding.

Q: Can I claim deductions for prior years? A: Yes — reclamation contentieuse allows back-filing up to 31 December of the second year following the original assessment. So in 2026 you can still rectify 2024 returns.

Q: Does my Polish IKE/IKZE qualify for the French PER deduction? A: No — only French-registered PER, PERP, PERCO, Madelin contracts qualify. Polish IKE/IKZE contributions are not deductible in France.

Q: Do I owe French tax on Polish bank interest? A: Yes — declared on 2047 frame 3, carried to 2042 line 2TR, taxed under 30% PFU or progressive bareme if you elect for it. CSG/CRDS applies on top unless A1-exempt.

Q: Do I have to declare crypto wallets on 3916-bis even with zero gains? A: Yes — the 3916-bis covers wallet existence, not gains. Disposals go on form 2086. Omission penalty 750 EUR per wallet for accounts holding under 50,000 EUR, 1,500 EUR above.

Sources

• Direction generale des Finances publiques (DGFiP) — annual brochure pratique IR.
• Code general des impots (CGI) — Articles 4 B, 155 B, 197, 200, 1727, 1728.
• Forms 2042, 2042-C-PRO, 2042-NR, 2042-RICI, 2047, 2074, 2086, 3916, 3916-bis, 2044.
• France-Poland Double Taxation Treaty (1975, renegotiation pending).
• Bulletin officiel des Finances Publiques (BOFIP) — impatries regime guidance.
• Polish Ministry of Finance — PIT-36, PIT/ZG annex, CFR-1.