CFIUS Review Process: What Foreign Investors Need to Know
A CFIUS filing is a substantive national security review that can shape how an investment operates after closing. Foreign investors need to plan for the preparation of detailed disclosures, questions from multiple agencies, and possible restrictions on governance, technology access, and business integration. For transactions involving Chinese investors, these considerations should be built into negotiations and financing arrangements from the outset.
The most useful timetable starts before submission and continues beyond clearance. The formal review periods do not include all the time needed to prepare a filing, address draft comments, or negotiate mitigation. A realistic process plan identifies who will provide the information, who will answer agency questions, and which conditions the parties can commercially accept.
Choosing between a declaration and a full notice
A declaration is a shorter submission with a 30-day assessment period after acceptance. It can be suitable for a transaction with straightforward ownership and limited national security concerns. A mandatory filing obligation can generally be satisfied through a declaration or a full written notice, subject to the applicable rules.
A declaration does not guarantee a final clearance decision. CFIUS may conclude all action, request a full notice, state that it cannot conclude action on the declaration, or initiate its own review. A response stating that CFIUS cannot conclude action is not equivalent to clearance. Parties seeking transaction certainty must understand the particular outcome received.
For a complex investment involving Chinese ownership, sensitive technology, or extensive post-closing integration, counsel may recommend proceeding directly to a full notice. This is a strategic assessment rather than a nationality-based filing rule. A declaration followed by a notice can take longer than filing the notice initially.
Preparing a filing that explains the actual transaction
The investor and target ordinarily prepare the filing together. The submission should explain what the U.S. business does, who ultimately owns and controls the investor, how the purchase is financed, which rights are being acquired, and what the parties intend to do after closing. Organisational charts should reconcile with governance documents and financing arrangements.
A useful technical description addresses products, software, research, export classifications, government customers, data, and operational facilities in language that a multidisciplinary government team can understand. Describing a company simply as a “technology platform” or “healthcare business” leaves important questions unanswered.
Foreign-language supporting materials require appropriate English translations, including certified translations where required. Chinese investors should identify potential restrictions on disclosure under applicable Chinese law before the filing is due. Those issues need a lawful, workable resolution rather than an incomplete ownership explanation or an inaccurate certification.
Pre filing engagement and acceptance
Treasury encourages early consultation, and parties filing a notice commonly submit a draft before the formal filing. Engagement can help identify missing information and explain an unusual structure. CFIUS does not issue binding advisory opinions on jurisdiction, mandatory filing obligations, or the outcome of a proposed transaction.
Declarations and notices are submitted through the CFIUS Case Management System. The statutory clock starts after acceptance of a complete filing, rather than when the parties begin drafting or upload an incomplete submission. Formal notices carry a transaction-value-based filing fee, currently ranging from zero to $300,000; declarations do not carry a filing fee. The applicable valuation rules should be checked.
Understanding the formal review timetable
An accepted notice begins a review of up to 45 calendar days. If further examination is required, CFIUS may commence an investigation lasting up to another 45 days. In extraordinary circumstances, the investigation may be extended once for 15 days. A transaction referred to the President is subject to a separate 15-day decision period.
These periods are not a guaranteed outside date for clearance. Draft preparation and acceptance occur beforehand. With CFIUS permission, parties may withdraw and refile a notice, starting a new review period. A financing commitment or acquisition agreement should therefore allow for the actual filing strategy, potential refiling, and mitigation negotiations.
Managing questions during the review
The response timetable is demanding. Information requests during a declaration assessment generally require a response within two business days; requests during notice review or investigation generally require one within three business days. Longer periods require a written request and written approval. Parties should establish a response team covering ownership, finance, technology, cybersecurity, and operations.
Responses must remain consistent with the original filing and transaction documents. Material changes should be promptly disclosed. The parties also provide certifications, including final certifications when required. An unanswered question, material omission, or inaccurate certification can delay the process and create enforcement risk.
Possible outcomes and the commercial cost of mitigation
CFIUS may conclude all action without mitigation, conclude action subject to measures addressing identified risks, or refer unresolved concerns to the President. Parties may also abandon a transaction. Investors should not assume that every national security concern can be resolved through an agreement.
Possible measures include restrictions on access to sensitive information, security personnel, independent oversight, or separation of sensitive operations. The precise conditions depend on the transaction. Parties should model the effect on management, research collaboration, integration costs, and investment returns before agreeing to them. For an investor whose strategy depends on transferring U.S. technology to China, restricted access may change the economics of the deal.
Clearance can carry continuing obligations. Mitigation may involve reporting, audits, inspections, and designated compliance personnel. The acquisition documents should allocate implementation costs and responsibility, while the operating business needs the staff and systems to comply.
Preserving certainty through closing and beyond
Written confirmation that CFIUS has concluded all action generally provides protection against a later review of the notified transaction, subject to statutory and regulatory exceptions. That protection should not be treated as approval of a materially different transaction or permission to disregard mitigation. Separate regulatory approvals remain necessary where applicable.
Treasury’s Known Investor Program is intended to improve efficiency by collecting investor information in advance. Its published pilot does not change CFIUS jurisdiction or the statutory process. Chinese investors should not build a closing timetable around an assumed fast track.
Our approach coordinates the review with deal negotiation and the intended operating model. Early preparation, accurate disclosure, and a realistic assessment of acceptable conditions help investors make informed decisions about whether to proceed, restructure, or pursue a different opportunity.