Late French Inheritance Tax Declaration for a UK Heir: Form 2705, Penalties and How to Appeal

If you are a British heir and a French inheritance-tax return was not filed on time, do not assume that Brexit, a pending probate process in England or a lack of cash suspends the French deadline. France treats the déclaration de succession (inheritance declaration) as a separate tax obligation. It may be due even when the estate also contains UK assets, when the French notary is still collecting documents, or when the family has not yet divided the estate.

The first questions are practical but legally decisive: where did the deceased die, where was the deceased tax-resident, when did the heir become aware of the inheritance, and which French or UK assets must be included? The next questions concern the calculation: which droits de succession (inheritance tax) are due, whether UK Inheritance Tax can be credited, and whether interest or a late-filing increase has been added. A late filing should normally be regularised quickly, but a British heir can also preserve arguments about an incorrect deadline, an impossible filing, an incorrect asset value, double taxation and the conduct of a professional adviser.

This guide follows that order. Part I explains the deadline, Form 2705-SD and the evidence needed for a cross-border estate. Part II explains the financial consequences and the route for voluntary regularisation, a request for relief, or a formal challenge. The law is fact-sensitive: a letter from the French tax service, an assessment notice or an estate with UK property and French property should be reviewed against the documents and the current text of each rule.

Information checked for publication on 26 August 2026.

I. What deadline applies to a UK heir filing a French inheritance-tax return?

A. Does the six- or twelve-month limit depend on the death or the heir?

The starting point is the place of death, not the nationality of the heir and not the country in which the heir receives the letter from the notary. Article 641 of the French Code général des impôts (General Tax Code, or CGI) provides that the period is six months when the deceased died in metropolitan France. The official wording states: De six mois, à compter du jour du décès, lorsque celui dont on recueille la succession est décédé en France métropolitaine. If the death occurred outside metropolitan France, the ordinary period is one year. That distinction matters for a British family: a death in England, Scotland, Wales or Northern Ireland will generally put the case into the one-year category, while a death in France generally gives six months.

The period runs from the date of death. It is not reset because the heir lives in the United Kingdom, because a Grant of Probate is still being obtained, or because the French notary has not finished preparing the acte de notoriété (notarial deed identifying the heirs). Those circumstances may support a later request for a reduction or cancellation of charges, but they should not be treated as an automatic extension. The exact filing date, the date stamped by the tax office, and the date on which each document became available should therefore be preserved.

There are specialised statutory rules. Article 641 bis of the CGI provides a twenty-four-month regime for certain estates containing an immovable property or an immovable right whose ownership had not been recorded before death, subject to the conditions in that article. It is not a general extra two years for every French property in an estate. The notary must check whether the ownership record and the required post-death notarial certificate fall within the statutory conditions. If one of the conditions fails, the ordinary Article 641 period can remain relevant. A British heir should ask for the legal basis of any claimed extension in writing rather than relying on a general statement that “the property is still being sorted out”.

The filing deadline also has to be separated from the question of whether France may tax the estate at all. Article 750 ter of the CGI begins with the words Sont soumis aux droits de mutation à titre gratuit :. Its connecting rules can bring worldwide assets into the French tax base where the deceased was fiscally domiciled in France, can tax French-situs assets where the deceased was abroad, and can have consequences where the beneficiary has been resident in France for the statutory period. These domestic connecting factors are then read with the France–UK succession tax convention. A British passport does not decide the issue, and ownership of a French house does not by itself answer every question about UK bank accounts, pensions or shares.

In a cross-border file, prepare a short chronology before calculating anything: death date and place; the deceased’s homes and tax residence; the heir’s French residence history; the date of any will or codicil; the date a UK Grant of Probate or letters of administration was issued; the date each French asset was identified; and the date any French filing or payment was actually accepted. That chronology will show whether a return is late, whether the wrong period has been applied, and whether a delay was caused by a legal dispute rather than by simple inaction.

The identity of the person who must file also needs care. Article 800 of the CGI says that Les héritiers, légataires ou donataires, leurs tuteurs ou curateurs, sont tenus de souscrire une déclaration détaillée. In English, heirs, legatees, beneficiaries of gifts and their legal representatives may have a detailed filing duty. A légataire is a person who receives property under a will; that person is not always in the same position as an heir. Limited exemptions exist, including certain low-value direct-line inheritances and other low-value estates, but an exemption from tax is not automatically an exemption from filing. Check the conditions rather than concluding that no French inheritance tax is payable because the estate is below a familiar UK threshold.

French case law shows why a disputed devolution can change the analysis. In Cour de cassation, commercial chamber, 30 May 1989, no. 88-12.666, the estate was under sequestration and the claimant’s rights as universal legatee were not finally recognised until much later. The Court described the situation by stating that the claimant n’était jusque-là pas en mesure de déposer la déclaration de succession. That decision does not create a general safe harbour for every delayed estate. It illustrates a narrower point: if the person’s right to inherit was legally blocked and the evidence shows that a filing could not realistically be made, the penalties may be contestable.

The same reasoning appears in Cour de cassation, commercial chamber, 5 March 1991, no. 89-18.298. After a succession dispute and the appointment of a court administrator, the Court held that the claimant was not in a position to file and recorded that she n’était pas redevable de pénalités de retard. For a British heir, a genuine challenge to the will, identity of the beneficiaries or entitlement to the estate is materially different from not knowing that Form 2705-SD existed. The file should show the proceedings, orders, correspondence and dates, not simply the assertion that the estate was complicated.

B. Which form, assets and evidence must be filed when the estate is late?

Form 2705-SD is the principal French inheritance declaration form. The French tax administration’s official Form 2705-SD page also identifies Form 2705-S-SD and, where relevant, Form 2705-A-SD for a partial declaration concerning life-insurance benefits. The form is not a French version of a UK probate application. Probate proves authority to deal with an estate under the applicable UK procedure; the French declaration identifies the taxable transmission, the assets and liabilities, the relationship between the deceased and the recipient, and the tax calculation for France.

A late British file should be assembled in a way that lets a French tax officer understand the estate without reconstructing it from scattered emails. Start with the death certificate, the will and any codicil, the UK probate document or equivalent authority, the family-status documents, and the notary’s certificate identifying the beneficiaries. Obtain a French translation when the receiving office or notary requires one. Ask the professional handling the file whether an apostille or another form of authentication is required for each particular UK document. Requirements can differ between a tax filing, a notarial deed and a land-registration procedure, so an heir should not assume that one document format works everywhere.

Then create an asset schedule valued at the date of death. Separate French immovable property, UK immovable property, bank and investment accounts, shares, insurance policies, loans, household debts and tax liabilities. Record the account holder, country, balance at death, currency, valuation method and supporting statement. A later sale price is not automatically the date-of-death value. Conversely, a value in an old UK probate schedule may not answer the French valuation question. Keep the exchange-rate source and calculation used for each sterling amount.

Do not omit a UK asset merely because it is outside France. The correct result may be an inclusion in the French tax base, an allocation of taxing rights under the treaty, an exemption, or a credit for tax paid in the other country. Those are different outcomes. The France–UK succession convention, the French rules on fiscal residence and the UK domicile rules must be read together. A British pension, trust interest, life-insurance policy or jointly held account may require a separate classification before anyone can say whether it belongs in the taxable estate.

Prior gifts are another frequent source of an incorrect return. Article 784 of the CGI requires earlier gifts to be disclosed in the succession declaration where the law requires them to be taken into account. The current text begins: Les parties sont tenues de faire connaître. In practice, the fifteen-year “rappel fiscal” period and the nature of the earlier transfer can affect the available allowance and the rate. Gather UK and French gift deeds, bank evidence, declarations, dates and valuations. If a past transfer was made in sterling, retain the original amount and the conversion method rather than inserting a rounded euro estimate.

The place of filing depends on the facts. The official impots.gouv.fr guidance on when and where to file explains the relevant service for an estate connected with France and the route for a deceased person who was abroad. The Service-Public declaration page gives the practical framework and confirms that the filing is sent to the tax services that calculate any amount due. For a British heir, the Service des impôts des particuliers non-résidents (tax service for non-resident individuals, or SIPNR) may be relevant, but the correct office should be confirmed from the deceased’s status and the current official instructions. Do not send a valuable original to an unverified address and do not treat an email to a notary as proof that the tax office has registered the return.

Ask for evidence of receipt. Depending on the filing route, that may be a stamped copy, a secure message, a registration receipt or a letter from the service responsible for registration. The date of preparation by the notary is not necessarily the date of filing. If the first return was incomplete or a newly discovered asset must be added, a complementary or corrective filing may be needed. Mark every change and explain why the original filing did not contain it. A transparent correction is easier to assess than a silent replacement of the whole schedule.

The notary can coordinate the succession and calculate the tax, but the heir should read the declaration before signing. Confirm the names, addresses, family relationship, acceptance or renunciation position, asset values, debts, prior gifts, tax allowances and treaty credit. If the file contains a UK will, a foreign executor or an issue about forced-heirship rules, a British heir may also consult the firm’s French inheritance-law overview. The present article addresses the tax filing deadline; it does not replace the civil-law analysis of who owns each asset.

Payment and filing are connected. Article 1701 of the CGI states that death-transfer duties are paid before registration and adds: Nul ne peut en atténuer ni différer le paiement sous le prétexte de contestation sur la quotité. This is why a family should not leave the return unsigned while arguing about the eventual division of the estate. A dispute about the correct amount may be preserved through a claim for repayment or adjustment, while the tax position is regularised. There are exceptions and payment facilities, but they must be requested through the statutory process.

Article 1717 of the CGI provides the legal gateway for an instalment or deferred arrangement: Par dérogation aux dispositions de l’article 1701, le paiement des droits d’enregistrement et de la taxe de publicité foncière peut être fractionné ou différé. The request normally needs to accompany the declaration, satisfy the conditions for the type of estate, provide acceptable security and bear the applicable interest. Service-Public explains that the request should be made at filing and that the tax service may require guarantees and interest. A British heir facing a French property but little sterling liquidity should raise the request before the filing is submitted, not after a payment demand has already been ignored.

II. What penalties and remedies are available after a late Form 2705-SD?

A. How are interest, late-filing increases and double tax relief calculated?

There are three amounts that should be separated on a French calculation: the principal inheritance tax, interest for late payment or late settlement, and a late-filing increase. A fourth figure may arise if the declaration understated an asset, omitted a gift or claimed a relief without support. Calling every figure a “penalty” can obscure the argument. Ask the tax service or notary for a line-by-line calculation showing the base, the starting date, each payment and the legal provision applied.

Article 1727 of the CGI deals with interest for delay. It provides that Toute créance de nature fiscale, dont l’établissement ou le recouvrement incombe aux administrations fiscales, qui n’a pas été acquittée dans le délai légal donne lieu au versement d’un intérêt de retard. The statutory rate is 0.20% per month. The article also sets calculation rules, including a start on the first day of the month following the month in which the tax should have been paid and an end at the last day of the month of payment, subject to the detailed provisions of the current version.

For an illustration only, if €20,000 of principal tax remained unpaid for four complete chargeable months, 0.20% per month would produce €160 before any late-filing increase or adjustment. That arithmetic is not a tax assessment. The exact result depends on the legal deadline, the date of filing, the date and allocation of any advance payment, and whether the amount concerns the declaration, a later correction or a reassessment. A spreadsheet made from the dates on the receipt is more useful than a rounded annual estimate.

Article 1728 of the CGI is the late or missing declaration provision. Its current opening describes Le défaut de production dans les délais prescrits and provides, in the ordinary framework, a 10% increase for a late filing and a higher increase where the declaration remains outstanding after a formal notice. For declarations covered by Article 800, the provision contains special timing rules linked to the six-month and twenty-four-month periods in Articles 641 and 641 bis. Where the death occurred outside metropolitan France and the one-year deadline applies, the tax office’s calculation must be checked against the applicable version and the actual filing history. Do not copy a six-month calculation into a twelve-month case.

The formal notice is especially important. The current Article 1728 framework distinguishes a declaration filed within the period following the notice from one not filed within that period; the 40% increase can become relevant after the statutory period following the notice. A British heir who receives a French letter should record the date of receipt, preserve the envelope and ask whether it is an information letter, a mise en demeure (formal notice to file), a proposition de rectification (proposed adjustment) or an avis de mise en recouvrement (formal collection notice). Each document has a different procedural role.

Do not confuse late filing with an under-declared estate. Article 1729 of the CGI concerns certain inaccuracies or omissions and can apply where the administration establishes deliberate conduct, abuse of law or fraudulent manoeuvres. A late return filed openly with a reasonable valuation is not automatically evidence of an intention to conceal. The best protection is a complete schedule, an explanatory letter for uncertain items, and prompt delivery of any missing document.

The principal tax itself must be calculated before a relief request can be meaningful. Article 777 of the CGI states that Les droits de mutation à titre gratuit sont fixés aux taux indiqués dans les tableaux ci-après, pour la part nette revenant à chaque ayant droit. The rate depends principally on the relationship between the deceased and the recipient, the net taxable share and the relevant allowance. A child, spouse, civil partner, sibling, nephew and unrelated legatee do not enter the same scale. A British family should not apply the UK nil-rate band to a French return or assume that a spouse exemption has the same scope in both countries.

Double taxation requires a separate schedule. The official UK guidance on Inheritance Tax double-taxation relief explains that a treaty or unilateral credit can be relevant when two countries tax the same estate. HMRC’s Inheritance Tax Manual on France describes the evidence that may be requested in a France-related case, including the French declaration and tax-clearance material in the appropriate circumstances. The France–UK succession convention must then be applied to the asset and residence facts.

French domestic law also has a specific credit rule. Article 784 A of the CGI states that le montant des droits de mutation à titre gratuit acquitté, le cas échéant, hors de France est imputable sur l’impôt exigible en France in the cases and within the limits set by that article. The words “within the limits” matter. A foreign payment is not a blank cheque against the whole French assessment. Identify the asset on which each country charged tax, the person who paid, the date of payment, the final assessment and the treaty article or domestic rule relied on. If UK tax is provisional, say so and explain what document will follow.

Currency and timing can alter the apparent amount of relief. Preserve the sterling assessment, the euro conversion and the exchange rate date used by the French calculation. If the UK amount changes after a French credit was claimed, a corrective filing may be necessary. Conversely, if the French amount is reduced after an appeal, HMRC may need to be told. The two tax administrations do not automatically update one another merely because a notary has sent a copy of a return.

Finally, distinguish tax solidarity from the internal division of the estate. Service-Public explains that heirs can be jointly liable to the French tax authority for the amount due by the heirs, while a legatee’s liability can be limited to that person’s share in the relevant circumstances. If one British heir advances the tax for everyone, obtain a written record from the notary of the amount paid for each person and the right to seek contribution internally. The fact that one person paid the French authority does not decide who should bear the cost between family members.

B. How can a UK heir regularise, challenge or request time to pay?

The first remedy is often a prompt voluntary filing. Send the completed declaration through the correct channel, pay what can safely be paid, and attach a concise letter explaining the delay. The letter should identify the date of death, the original deadline, the date on which the return is now filed, the missing facts that caused the delay, the steps taken to obtain them, and the legal and financial consequences. Attach a chronology and an index of documents. Avoid a narrative that blames everyone in general; focus on dates that can be proven.

If the estate is still incomplete, ask the tax service and the notary how a principal declaration, a complementary declaration or a corrective declaration should be coordinated. Do not omit a known UK account merely because the bank statement is late. State that the figure is provisional only where the law and the professional handling the file permit that treatment, identify the evidence still awaited, and update the tax office as soon as the final figure arrives. A transparent provisional approach is different from filing a knowingly incomplete return without explanation.

At the same time, request a remise gracieuse (discretionary reduction or waiver) of interest or increases where the circumstances justify it. The French government has confirmed in response to a parliamentary question that late succession filings can generate interest and increases, but that obstacles can be examined through a discretionary remission process under Article L. 247 of the Book of Tax Procedures. The official response is available on the Assemblée nationale website. The request should be evidence-led: attach proof of a contested will, a court appointment, a missing foreign certificate, a serious illness, a professional error, a blocked bank account or another obstacle, as applicable. Explain what the heir did during the period and why the delay was not an attempt to hide the estate.

A discretionary remission is not the same as a legal challenge. Use a formal réclamation contentieuse (tax claim) where the assessment is legally or mathematically wrong. Possible grounds include the wrong place-of-death period, a misapplied Article 641 bis extension, an asset counted twice, a debt rejected without proper analysis, an incorrect family relationship, an omitted treaty allocation, a wrongly calculated foreign-tax credit, or a majoration applied from the wrong date. The claim should identify the contested line, the evidence and the amount requested. A general complaint that the tax is too high is unlikely to replace that analysis.

Check the procedural document before choosing the route. A letter requesting information is not the same as a proposed adjustment. A proposed adjustment usually gives a period for observations. An avis de mise en recouvrement records an amount the administration seeks to collect and requires careful attention to the time limit for an administrative claim and any later court proceedings. Keep proof of delivery for every response. If a deadline is close, send a protective claim with the available evidence and supplement it, rather than allowing the period to expire while waiting for a perfect translation.

The cases about an impossible filing should be used carefully. No. 88-12.666 and no. 89-18.298 concerned substantial legal disputes over the claimant’s right to the estate and the loss of control caused by sequestration or a court administrator. They do not say that a notary’s ordinary workload, a family disagreement about valuation or an heir’s residence in Britain automatically removes the charges. Match the evidence to the principle: was the heir legally unable to declare, or merely waiting for a document that could have been chased while filing and paying an estimated amount?

Where the notary handled the tax timetable, consider two separate questions. First, the French tax authority may still pursue the persons legally liable for the tax; a private claim against the notary is not a substitute for responding to the tax authority. Second, the professional may owe information or advice duties. In Cour de cassation, first civil chamber, 8 December 2021, no. 20-20.284, the Court stated: la preuve de l’exécution de son obligation d’information et de conseil incombe au notaire. The judgment concerned the burden of proving the notary’s information and advice, including the options around a delayed succession and instalment payment. Preserve engagement letters, fee invoices, appointment notes, emails, requests for documents, draft returns and any promise that “the notary will take care of everything”.

A separate decision, Cour de cassation, commercial chamber, 29 June 1999, no. 97-11.676, is a reminder that the role allocated to the notary and the role allocated to the heirs must be examined from the facts. Its dispute concerned the financial consequences of a late succession declaration and whether the notary had undertaken to prepare and file it. It should not be cited as a promise that the tax office will transfer every surcharge to a professional. Instead, use it to separate the public-tax debt, the internal contribution between heirs and any professional-negligence claim.

If the problem is liquidity rather than the legal existence of the tax, make the instalment or deferred-payment request immediately. Service-Public’s payment guidance describes the two mechanisms, the need for guarantees and interest, and the risks of losing the arrangement if an instalment is missed. Article 1717 of the CGI is the statutory foundation, but the practical conditions are detailed in the implementing provisions and in the written approval. The request should identify the assets that are illiquid, the proposed payments, the available security, the expected sale or refinancing date and the plan for keeping current with each instalment.

Do not wait for a French property sale if other assets can fund a first payment. An advance payment can reduce the amount on which interest is calculated, although the allocation and date must be recorded. Do not borrow against a UK home without comparing the cost and security consequences to the French payment arrangement. The correct solution may involve a partial payment, a secured instalment plan, a sale of an investment, or a dispute over the tax base. The choice is financial as well as legal, and it should be documented as part of the estate accounts.

When the French and UK figures are being reconciled, create a two-column evidence table. The first column lists the asset, the country, the date-of-death value and the French treatment. The second lists the UK treatment, the tax paid or expected, the treaty provision and the evidence for a credit or exemption. Add a third line for each asset that was excluded, with the reason. This prevents a credit from being claimed for the wrong property and makes it easier to answer a request from either tax authority.

As a practical sequence, a British heir should: obtain the official death and probate documents; confirm the place of death and both residence histories; identify the competent French tax office; obtain Form 2705-SD and any relevant supplementary form; build the date-of-death asset and liability schedule; investigate prior gifts and foreign tax; file and pay or request an approved facility; then respond to any notice within its stated period. If the heir may instead renounce the inheritance because of debts, that is a different decision with civil-law deadlines and should be considered alongside the firm’s French inheritance-law overview. Filing the tax declaration does not itself decide whether renunciation remains available.

Finally, ask for the tax service’s written position on any disputed amount. If it accepts a correction, keep the revised calculation, the acknowledgement and proof of repayment or credit. If it refuses a remission, decide whether the issue is now a legal claim, a professional-liability matter or simply a payment negotiation. If it issues a collection notice, do not send repeated informal emails while the formal time limit runs. A French lawyer can coordinate the tax claim, the treaty evidence and, where appropriate, a claim against a notary or another professional.

Conclusion

A late French inheritance-tax declaration is not cured by the fact that the heir is British, the will was proved in the UK or the estate contains more sterling than euros. Start with the place of death and the Article 641 period, then test the French tax connection, the France–UK treaty and the asset schedule. File Form 2705-SD with evidence, separate principal tax from interest and increases, and make a payment-facility request before liquidity becomes the reason for further delay.

The strongest challenge is usually precise: the wrong deadline, a legally impossible filing, a duplicated or wrongly valued asset, an omitted foreign-tax credit, or an increase calculated from the wrong date. A discretionary remission can address genuine obstacles even when the legal tax remains due. Court decisions show that a proven inability to file may matter, while a general family delay does not automatically remove the charges.