You live in London, New York, Dubai or Singapore and you are about to take control of a French company, buy a 30% stake in a Lyon software publisher, or acquire one branch of activity from a French group. The price is agreed, the letter of intent is signed, and your lawyer in Paris asks an unexpected question: have you filed for prior authorisation for foreign investment in France, the so-called IEF procedure. Many deals discover this requirement late, when the timetable for signing is already fixed and the financing is already committed. This article explains, for a foreign investor living abroad, when France requires prior authorisation from the Minister for the Economy, which transactions and which sectors are caught, how the filing and the review run in practice, what conditions can be attached, what happens if you close without authorisation, and how you challenge a refusal, conditions, injunctions or a fine without flying to Paris for every step. Every French acronym is explained along the way.

The French system is an authorisation regime, not a simple declaration. Article L.151-3 of the Monetary and Financial Code states that Sont soumis à autorisation préalable du ministre chargé de l’économie les investissements étrangers dans une activité en France qui, même à titre occasionnel, participe à l’exercice de l’autorité publique ou relève de l’un des domaines suivants, and it lists public order, public security and national defence, plus weapons and explosives research, production and marketing. A decree in Conseil d’Etat defines the rest. If your target operates in a listed sector and your transaction meets the definition of a foreign investment, closing before the authorisation is unlawful and exposes you to injunctions, conservative measures and a fine. The good news is that the procedure is centralised, can be prepared from abroad, allows a prior ruling on whether you are caught, and offers a full judicial remedy. The Conseil d’Etat confirmed the logic of this review in a leading case where, par une décision du 16 décembre 2015, le ministre de l’économie, de l’industrie et du numérique a, en application de l’article L. 151-3 du code monétaire et financier, autorisé la société FII Co, société de droit luxembourgeois détenue indirectement par deux fonds d’investissement gérés par la société de droit anglais Warwick Capital Partners LLP, à prendre le contrôle de la société B… Industries. That decision, challenged by third parties and upheld through the administrative courts up to the Conseil d’Etat on 3 April 2020, shows how the minister examines durability of activities, industrial capacities, research and know-how before authorising under conditions. Understanding that examination is the key to closing on time.

This guide first maps the scope of the regime from abroad: who counts as a foreign investor, which deals are investments, and which French activities trigger review. It then follows the operational path: ruling request, filing, review timetable, conditions, closing mechanics, and remedies against refusal or sanction. It is written for the business reader and sourced to the statutes in force on 5 October 2026, with links to Legifrance for every decisive text. If you are still hesitating on the vehicle itself, read our companion on how to choose between an SAS, an SARL and a branch when you invest from abroad before structuring the acquisition.

I. Do you need prior IEF authorisation before buying into a French company from abroad?

The short answer depends on three cumulative questions: are you a foreign investor within the meaning of the French rules, is your deal an investment within the meaning of those rules, and does the French target carry on a listed sensitive activity. Only when all three answers are positive do you need to file. Each question has traps for groups, concert parties and listed companies, so take them in order.

A. Are you a foreign investor and is your deal an investment caught from abroad?

French law defines the foreign investor widely, and it looks through chains of control. Article R.151-1 of the Monetary and Financial Code treats as an investor Toute personne physique de nationalité étrangère, any French national not domiciled in France for tax purposes, Toute entité de droit étranger, and any French entity controlled by one of those persons or entities. Control for this purpose is assessed under Article L.233-3 of the Commercial Code, which covers majority voting rights, contractual majority, de facto determination of general meeting decisions, and power to appoint or remove most board or supervisory members. Where the investor sits inside a chain of control, every person and entity in that chain counts as an investor. In practice, the Directorate General of the Treasury, known as the DG Tresor, the department of the Ministry for the Economy that instructs IEF files in Paris, will ask for the full ownership chart up to the ultimate beneficial owner, including funds, general partners and parallel vehicles. If you invest through a Luxembourg holding company owned by a British manager acting for Gulf or American funds, as in the 2015 case cited above, each layer can be treated as an investor and one member of the chain may file for all.

The deal itself must be an investment listed in Article R.151-2. The text catches the acquisition of control, within the meaning of Article L.233-3 of the Commercial Code, of a French-law entity or of an establishment registered with the French trade and companies register, since the article covers D’acquérir le contrôle, au sens de l’ article L. 233-3 du code de commerce , d’une entité de droit français ou d’un établissement immatriculé au registre du commerce et des sociétés en France. The trade and companies register is the registre du commerce et des societes, usually shortened to RCS, kept by the greffe, the registry office of the commercial court, which issues the Kbis, the official identity card of a French company, and publishes creations and transfers in the BODACC, the official bulletin of civil and commercial announcements. The same article also catches the acquisition of all or part of a business branch of a French entity, and the crossing, directly or indirectly, alone or in concert, of the threshold of 25% of voting rights in a French entity, since it covers De franchir, directement ou indirectement, seul ou de concert, le seuil de 25 % de détention des droits de vote d’une entité de droit français. For companies whose shares are admitted to trading on a regulated market, a lower 10% threshold applies, with a fast-track notification procedure described below. Intra-EU investors benefit from an exemption for the 25% and 10% thresholds when the whole control chain sits in the European Union or the European Economic Area with a tax assistance treaty with France, but non-EU investors, including British, American, Swiss, Gulf and Asian buyers since Brexit and in all cases outside the Union, remain fully caught. Concert is read broadly: shareholders acting together under a shareholders agreement, a joint bidding vehicle, or parallel funds under a common manager can cross the threshold together even if each stays below it alone.

Two practical points matter when you live abroad. First, the filing is made by the investor, but where several investors belong to the same control chain, one member may file for all, which avoids parallel filings from each fund vehicle. Second, a listed-company buyer crossing 10% may use prior notification instead of a full application: unless the minister objects, the exemption from a full application arises after ten business days from notification. Do not confuse this narrow listed-company notice with a general exemption. A 24% stake that later moves to 26% through a capital increase, a conversion of convertible bonds, or an exercise of warrants crosses the threshold at that later moment and triggers the filing then. Similarly, acquiring a French establishment, meaning a French branch registered with the RCS, counts even without acquiring a company. When in doubt, the safest step is the ruling request described in the second part, because closing without a required authorisation is sanctionable even if you genuinely believed you were outside the scope.

B. Does your French target operate in a listed sensitive sector?

Even a large acquisition needs no IEF authorisation if the French target carries on no listed activity. The list sits in Article R.151-3 and it is long, precise and regularly extended. It covers, first, activities that by nature affect national defence, public authority or public order: weapons, ammunition and explosives for military purposes, dual-use goods listed in Annex IV of EU Regulation 2021/821, entities holding national defence secrets, information-systems security supplied to operators of vital importance, defence contracts and subcontracts, cryptology, interception and remote conversation-detection equipment, approved evaluation centres, gambling except casinos, means against illicit use of pathogens and toxins, and processing, transmission or storage of data whose compromise would harm those activities. It covers, second, essential infrastructures, goods and services where the activity affects integrity, security or continuity: energy supply, water supply, transport networks and services, space operations, electronic communications networks and services, police, gendarmerie, civil security, prison and customs missions, approved private security companies, operation of establishments of vital importance, public health protection, production, processing or distribution of agricultural products contributing to national food-security objectives, political and general press publishing and online press services, and extraction, processing and recycling of critical raw materials. It covers, third, research and development intended for those activities, including critical technologies listed by ministerial order and dual-use research listed in Annex I of the same EU regulation. The full text is available at Article R.151-3 of the Monetary and Financial Code, and the founding principle remains Article L.151-3 of the Monetary and Financial Code cited above.

Foreign buyers often underestimate three entries. Data hosting, managed security services and software with access to a vital operator can fall under information-systems security or protected data even when the target presents itself as a generalist IT services company. Components, materials and testing services supplied to aeronautics, space or defence primes can fall under subcontracts for the ministry or under dual-use even when the target never signs a defence contract directly. Food processing and agricultural distribution were added for food security and can catch agribusiness deals that look purely commercial. Conversely, a pure retail, restaurant, standard e-commerce, general consulting or non-sensitive real-estate target with no listed activity stays outside IEF even for a 100% takeover by a non-EU buyer. The analysis is activity by activity, branch by branch: buying only the non-sensitive branch of a mixed group can avoid the filing if the sensitive branch is genuinely excluded from the perimeter, while buying the sensitive branch alone triggers it. Ask the seller for a precise activity description, customer lists by sector, defence and vital-operator contracts, certifications, and hosted-data maps before concluding you are clear. The DG Tresor applies the list as in force on the filing date, so check the version dated 5 October 2026 on Legifrance, not a summary found on a blog.

When the target clearly operates a listed activity and the buyer is non-EU, file. When the position is borderline, request the written ruling described below rather than self-assessing in the purchase agreement alone. Purchase agreements signed from abroad should in any event contain an IEF condition precedent, a long-stop date compatible with the 30 plus 45 business-day review described below, cooperation duties for information requests, and allocation of the risk of conditions, refusal or sanction. Lenders also require the authorisation as a condition to drawdown when the target is sensitive, because the sanction can freeze voting rights, dividends and disposals. Mapping the perimeter early is therefore not a formality; it drives price, timetable and financing.

II. How do you file, close and challenge an IEF decision from abroad?

Once the scope analysis points to a filing, the operational sequence is standardised: optional ruling, formal application, two-stage review, conditional authorisation or refusal, closing mechanics, and, where needed, challenge. Every step can be handled from abroad through counsel with a power of attorney, electronic filing and videoconference, except that original legalised documents and sworn translations must be couriered in paper when the greffe, the bank or the notary requires them for the underlying acquisition.

A. How do you obtain a ruling or an authorisation without blocking your timetable?

Start with the ruling request when the scope is uncertain. Article R.151-4 provides that where a French entity asks the minister whether all or part of its activity falls under Article L.151-3, the minister replies within two months, and an investor may ask the same question jointly with the target, with a copy of the opinion sent to the target. The text states that le ministre chargé de l’économie répond dans un délai de deux mois. Use this route when the target may or may not be sensitive, when the perimeter carves out the sensitive branch, or when you need a written answer to show the board, the lender or the seller. The request describes the target activities, the transaction, the control chain and the voting-rights math, and it attaches the draft purchase agreement. A negative ruling, meaning the investment does not fall under Article L.151-3, secures the timetable. A positive ruling tells you to file immediately. File the ruling and theNBSP;application through counsel in Paris; the file is instructed by the DG Tresor after consultation of the relevant ministries, including defence, interior and the sector ministry.

The formal application follows Article R.151-5: it is lodged by the investor, or by one member of the control chain for all members of that chain. The provision states that La demande d’autorisation d’un investissement étranger est déposée par l’investisseur and that one member of the chain may file for all. For the 10% listed-company case, prior notification suffices and, unless the minister objects, the exemption arises after ten business days. Expect detailed information requests: ultimate owners, financing sources and conditions, governance after closing, business plan for the sensitive activity in France, employment, research and production commitments, data location and access, supply-chain continuity, and independence from foreign legislation that could order disclosure or shutdown. Build the file as you would a merger filing: complete, consistent and translatable. An incomplete file restarts the clock in practice because the administration asks for supplements.

The review runs in two stages under Article R.151-6 of the Monetary and Financial Code. The article opens with the rule that Dans un délai de trente jours ouvrés à compter de la date de réception d’une demande d’autorisation, le ministre chargé de l’économie indique à l’investisseur ayant déposé la demande soit que l’investissement ne relève pas du I de l’article L. 151-3 , soit qu’il en relève et est autorisé sans condition, soit qu’il en relève mais qu’un examen complémentaire est nécessaire. Silence at the end of those 30 business days counts as rejection, so diary the date from the acknowledged receipt. Where further examination is needed, the refusal or the authorisation, with conditions where relevant, is issued within 45 business days from receipt of that first decision by the investor and by the investors designated as responsible for compliance. Silence again counts as rejection. In calendar terms, count roughly six weeks then nine weeks excluding French public holidays, and align the purchase agreement long-stop date with at least five months plus a buffer for supplements and conditions negotiation. Authorisation may be unconditional or conditional. Conditions must respect proportionality and mainly aim, under Article R.151-8 of the Monetary and Financial Code, to Assurer la pérennité et la sécurité, sur le territoire national, des activités énumérées à l’article R. 151-3 exercées par l’entité objet de l’investissement, to preserve know-how and prevent capture, to adjust internal organisation, governance and exercise of acquired rights, and to set reporting duties to the monitoring authority. The minister may for example require continued production in France, maintenance of research teams, ring-fencing of sensitive data, prior notice of further transfers, or partial divestiture to an approved buyer. The authorisation designates which investors are responsible for compliance. In Paris practice, most sensitive files close with conditions rather than with a clean approval or an outright refusal, and the negotiation of workable conditions from abroad, with measurable milestones and realistic reporting, decides whether the deal survives. Keep the financing, the shareholders agreement and the employment plan consistent with those conditions before signing them.

Paris and Ile-de-France specifics help when you live abroad. The file is national and lodged centrally, but the target will often be registered with the Paris greffe, the Paris trade registry, and the closing will use a Paris notary or lawyer, a French bank for the capital or price funds, and the INPI, the National Institute of Industrial Property, where patents or trademarks transfer with the business. Powers of attorney signed abroad must be apostilled or legalised where required, identity documents must be certified, and foreign company documents must be translated by a sworn translator. The Kbis of the newly acquired company, the BODACC publication of the transfer where applicable, and the RCS update are handled after closing by the Paris counsel, but they do not cure a missing IEF authorisation. Sequence the signatures: IEF authorisation first, then funds release, then closing, then RCS filing. Never invert the order to meet a seller deadline.

B. What risks do you face without authorisation and how do you challenge a refusal or a sanction from abroad?

Closing without a required authorisation is not a curable oversight. Article L.151-3-1 empowers the minister to order Injonction à l’investisseur de déposer une demande d’autorisation, to order Injonction à l’investisseur de rétablir à ses frais la situation antérieure, or to order modification of the investment, with possible daily penalties, known as astreinte, whose amount and effective date are fixed in the injunction. The full range sits at Article L.151-3-1 of the Monetary and Financial Code. Where national interests are compromised or at risk, the minister may also take conservative measures: suspension of voting rights attached to the shares that should have been authorised, prohibition or limitation of dividends and remuneration, temporary suspension or restriction of disposal of assets linked to the listed activities, and appointment of a trustee, called mandataire, inside the company to protect national interests, paid by the company. Breach of conditions attached to an authorisation exposes you to withdrawal of the authorisation, injunctions to comply within a fixed period or to perform substituted prescriptions including unwinding or divestiture, plus the same conservative measures. Decisions and injunctions under this article can only be taken after the investor has been given 15 days to submit observations, except in emergency, exceptional circumstances or imminent harm to public order, security or defence. Those decisions are subject to full judicial review, known as recours de plein contentieux, which lets the judge reform as well as annul.

The financial sanction is separate and severe. Under Article L.151-3-2 of the Monetary and Financial Code, where an investment was made without prior authorisation, where authorisation was obtained by fraud, where conditions were disregarded, or where injunctions were not performed, the minister may, after giving the investor at least 15 days to comment on the alleged facts, impose a fine of up to the highest of the following sums: le double du montant de l’investissement irrégulier, 10 % du chiffre d’affaires annuel hors taxes de l’entreprise qui exerce les activités définies au I de l’article L. 151-3, cinq millions d’euros pour les personnes morales et un million d’euros pour les personnes physiques. The amount must be proportionate to the gravity of the breaches and is recovered like a state claim. In practice the minister combines injunction, conservative measures and fine to force rapid regularisation or exit. A buyer who closed without filing therefore faces frozen governance, blocked dividends, a trustee inside the company, an order to unwind at its own cost, and a fine calibrated on the deal value or the target turnover. Lenders treat this as an event of default, sellers face warranty claims, and directors face pressure from auditors, since the statutory auditor, called commissaire aux comptes, must report irregularities. The lesson is simple: never close on the assumption that regularisation after closing will be lenient.

Remedies exist and they are effective when prepared quickly. The refusal, the conditional authorisation, the injunction and the fine are administrative decisions that can be challenged before the administrative courts, with the leading precedent being Conseil d’Etat, 3 April 2020, No. 422580, where the Conseil d’Etat reviewed a ministerial IEF authorisation challenged by third parties and examined whether durability of activities, industrial capacities, research capacities and know-how would be preserved and whether integrity, security and continuity of supply and of vital operations were guaranteed. Full-review actions against sanctions go to the administrative judge, while the 15-day observation period before the decision is the first line of defence: file detailed observations, propose workable substituted commitments, document financing independence, data segregation and continuity plans, and show proportionality defects in the envisaged fine. Ask counsel to seek suspension where voting freeze or trustee appointment would cause irreversible harm, to negotiate substituted prescriptions such as a partial divestiture to an approved buyer instead of a full unwind, and to align the challenge with the deal timetable through escrow, extended long-stop and walk-away rights. Keep every deadline in business days, keep proof of receipt of each filing, and keep the observation letters, because the judge will review both the scope assessment and the proportionality of conditions and sanctions. An investor living abroad can give powers, testify by videoconference and produce foreign documents with apostille and sworn translation, so distance does not weaken the defence when the file is complete.

Conclusion

Buying into a French company from abroad succeeds when the IEF question is answered before the price becomes final. Check the three cumulative tests: foreign investor including through control chains, investment including 25% of voting rights or control or a business branch, and listed sensitive activity under Article R.151-3. When the answer is positive or doubtful, request the two-month ruling and then file a complete application through one member of the chain, plan for 30 plus 45 business days with silence counting as rejection, and negotiate proportionate conditions on durability, know-how, governance and reporting rather than accepting unworkable promises under pressure. Never close without the required authorisation: injunctions to unwind at your cost, suspension of votes and dividends, a trustee inside the company and a fine of up to twice the deal value or 10% of the target turnover are designed to hurt more than delay. Where a refusal, conditions, injunction or fine arrives, use the 15-day observations and then the full judicial remedy, as tested in the Conseil d’Etat case of 3 April 2020, and keep the purchase agreement, financing and RCS steps aligned with that defence. Prepared this way, a foreign acquisition in a sensitive sector closes on time and survives review.