What Form 2048-IMM actually is
Form 2048-IMM is the standalone French tax return for a real-estate capital gain realised by a non-resident seller. It exists because the French administration does not wait for your annual income-tax return to collect CGT on a French property sale; the tax is settled at the same moment as the deed, by the representative, on this single form. Everything that matters for your bill sits on two pages: the identification of the parties, the arithmetic of the taxable gain, the holding-period and the high-gain surtax, and the signature of the accredited representative who takes joint liability for the figures. If you have ever wondered why your representative asks for a specific envelope of documents two weeks before signing, it is because each envelope fills one line of this form.
Structure, section by section
The form opens with the identity block: seller, co-seller if any, accredited representative, property address, cadastral reference, acquisition date, and sale date. These are the anchors that let the French tax office cross-match the return against the notarial deposit made by the notaire. The second block is the price block: gross sale price, deductible costs borne by the seller, and the net sale price used for the gain calculation. The third block is the acquisition block: historic purchase price, documented acquisition costs or the statutory 7.5% flat, renovation invoices or the 15% flat when the property has been owned for more than five years. The fourth block applies the holding-period taper for income-tax CGT (full exemption at 22 years) and, separately, for social charges (full exemption at 30 years). The fifth block applies the high-gain surtax on the taxable gain per seller above €50,000. The sixth block totals the tax and the social charges, records the representative accreditation number, and carries the two signatures.
The supporting documents that go with it
The form is filed with a dossier, not on its own. The minimum pack is: your original acquisition deed or a certified copy; the sale deed (or the compromis at the filing stage, with the acte to follow); any renovation invoices issued by a French registered professional with the SIRET number visible; proof of residence abroad for tax purposes, either a residency certificate from your country or the previous notarial deed that recorded you as a non-resident; and the representative mandate you signed. If you have held the property in a French SCI, the pack also includes the company statuts and the latest share register. Missing documents do not automatically block the filing, but they shift lines to the statutory lump-sums, which usually increase the taxable gain.
Worked example
A Canadian resident sells an Antibes apartment in 2026 for €520,000. The acquisition deed from 2006 shows €285,000 plus documented notary fees of €22,000. Renovation invoices from a French artisan total €31,000. The representative fills the price block at €520,000, deducts €6,400 of seller-borne deed costs, and records a net sale price of €513,600. The acquisition block shows a reconstructed basis of €338,000 (€285,000 + €22,000 + €31,000). The raw gain is €175,600. With 18 full years of holding, the income-tax taper gives around 84% relief and the social-charge taper around 32%. The income-tax base drops to roughly €28,100, CGT at 19% is €5,339, no surtax since the per-seller taxable gain stays under €50,000, social charges land near €20,533. Total line on the form: about €25,870.
Pitfall to avoid
The common pitfall is submitting renovation invoices that do not carry a French SIRET or that mix materials with labour done by the owner. The French tax office accepts only invoices from a VAT-registered professional, and it accepts them only for work physically performed on the property (not for furniture, not for swimming-pool covers, not for the owner time). One invoice missing a SIRET can remove €10,000 or €20,000 from the deductible renovation block, which then flows all the way to the CGT line. Ask your representative to pre-validate every invoice a full fortnight before signature, when there is still time to chase a replacement or to opt for the 15% flat instead.
Pro tip
When the price is close to the €150,000 per-seller exemption threshold, remember that the 2048-IMM is still filed, even with a zero-tax outcome. The representative will record the gain, apply the exemption, and submit the form with a nil result. Do not try to skip the filing because the tax is zero; the notaire cannot release the funds without the stamped form in the dossier. The right play here is to have the representative charge a reduced no-tax fee (most firms offer one around €900 to €1,200) rather than the standard percent-of-sale model, because the work volume is genuinely smaller.
Key takeaways
- Form 2048-IMM is the standalone CGT return filed by the accredited representative at deed time.
- The form has six blocks: identity, sale price, acquisition, holding-period taper, surtax, totals.
- Supporting documents are filed with the form; missing pieces push lines to the statutory lump-sums.
- Renovation invoices must carry a French SIRET and cover labour performed on the property.
- A zero-tax sale still requires the form; ask for a reduced filing fee if no tax is due.
Frequently asked questions
Who physically files Form 2048-IMM?
Your accredited representative prepares and signs the form; the notaire attaches it to the deed file and deposits it with the Service de la Publicité Foncière within the legal deadline of one month after signature. As the seller, you sign a power of attorney that authorises both parties to act.
What happens if a supporting invoice is rejected?
The representative substitutes the 7.5% lump-sum acquisition cost or the 15% renovation lump-sum, whichever was bypassed by the rejected document. The taxable base is recomputed, the CGT moves, and the representative reissues the form before the funds are released.
Can the form be filed after signature if we run late?
Not safely. The notaire is legally required to hold the proceeds until a cleared 2048-IMM is in the file. Filing after the deed date is possible in narrow circumstances but triggers late-filing interest and, in practice, blocks the wire transfer for weeks.
Does the form show the representative fee as a deduction?
No. The representative fee does not reduce the taxable gain and is not entered on the form. It appears on the notaire statement of account (decompte) as a charge on the seller side, deducted from the net proceeds, but outside the 2048-IMM calculation.