How French audits on non-residents actually start
The French tax authority runs algorithmic cross-checks on every 2048-IMM filed by an accredited representative. Three data layers feed the engine: the notaire declaration, the seller identity on international registries, and the historic French filings on the same property. When any line disagrees, the file drops into a human review queue, and an initial information request (proposition de rectification) is sent to the representative, who forwards it to the seller. Around 4% of non-resident sales receive such a request in the three years following the deed. Most are closed within 60 days once documents are produced; a minority escalate to a full audit. The mistakes that feed that queue are predictable.
The six mistakes that trigger most audits
1. Works deducted without proper invoices
Claiming the actual-cost route for renovations without French VAT invoices tied to the SIRET of a registered contractor is the number-one flag. The authority compares the amount claimed to a statistical benchmark by property type and region; anomalies are flagged. Cash receipts, quotes without matching invoices, and invoices issued by foreign contractors are all rejected in review.
2. Social-charges rate mismatch
Declaring the reduced 7.5% prélèvement de solidarité without holding a valid A1 certificate or an EU/EEA/Swiss social-security affiliation triggers a mechanical correction letter. The cross-check is automated and fast, usually within 6 to 12 months of filing.
3. Acquisition basis inflated by double counting
Counting the agency commission twice, once as an acquisition cost and once as a selling cost, or adding notaire fees already rolled into the headline acquisition price, are common drafting errors. Representatives who run the file in a hurry miss them; the authority compares against the deed archive and finds them.
4. Principal-residence claim by a non-resident
Applying the primary-home exemption when the seller has already relocated abroad, without meeting the strict 12-month window and non-letting condition, is a classic misfire. It gets caught when the residency certificate date conflicts with the claim.
5. Hidden VAT exposure on rental history
Sellers who rented their property under LMNP or seasonal arrangements and then forgot to adjust the taxable basis for depreciation recapture draw a second-level check. The authority sees the historic 2044 filings and wants to see the adjustment on the sale.
6. Mismatched seller identity on foreign registries
A trust structure or SCI shareholding that was not disclosed to the representative, or a seller whose name on the acte differs from the tax residency certificate, pulls the file into manual review. Disclosure up front is always cheaper than disclosure after a letter.
Worked example
An Australian seller signs the acte on a Bordeaux townhouse in early 2026. The representative files the 2048-IMM with €130,000 of deducted works. Of the 11 invoices, 3 come from a contractor whose SIRET was terminated in 2019; the works were done in 2021. The automated check flags the file in month 9. The representative responds by producing the new SIRET of the same person (he re-registered as a micro-entreprise in 2020), and the file is closed without correction. Total cost to the seller: two weeks of back-and-forth, no additional tax. The value of having a representative who knows which invoices will age badly, and who flagged them at signing with a provisional reserve, is measured here.
Pitfall to avoid
The pitfall is treating the deed date as the end of the file. Sellers close the French bank account, change email address, and cannot be reached when the authority sends a letter to the representative. The representative then has 30 days to respond, with no input from the seller, and may have to default to a conservative position that costs deductions. Keep the French bank account open for 24 months after the deed; keep a forwarding email to the representative active; answer any notice within 10 days. These small operational disciplines save files that were in order.
Pro tip
Ask your representative to file a note to file (note d'analyse) alongside the 2048-IMM when any line could be contested. A one-page note, dated the day of the deed, explaining why the agency commission is deducted here rather than there, or why a works invoice from a terminated SIRET is still valid, is accepted by the authority as contemporary evidence of good faith. It does not prevent the flag, but it closes the review much faster. Most representatives will draft one on request; few offer it spontaneously. Ask.
Key takeaways
- Audits on non-residents cluster 18 to 30 months after the deed.
- Six errors produce most flags: works evidence, social-charges rate, double counting, principal-residence misclaim, rental recapture, identity mismatch.
- Automated cross-checks catch the easy ones; human review covers the rest.
- Keep the French bank account and a forwarding email live for 24 months.
- A contemporary note to file closes reviews faster than post-hoc explanations.
Frequently asked questions
How long after the sale can a French audit land?
Three full calendar years following the year of the deed, extended to ten years in cases of undisclosed foreign activity or fraud. Most audits on non-residents arrive between month 18 and month 30 after the deed.
Does my representative remain liable during that window?
Yes. The accredited representative is jointly liable with you, with no cap and no time limit within the statutory audit period. That is the value you pay for, and the reason reputable firms scrutinise the file before signing.
If I am audited, do I need a new representative or can I use the original one?
The original representative usually handles the response, because they hold the file. If relations have soured, you can appoint a French accountant or lawyer; the accreditation is not required for post-audit defence, only for the original filing.
Do social charges errors trigger audits as often as income-tax errors?
Yes, increasingly. The 7.5% versus 17.2% flag is automated: cross-checks with EU social-security databases catch mismatches within months, and the letters go out in batches once a year.