Delaware C-Corp for a Ukrainian Startup: Why Register a Company in the U.S. and What About Controlled Foreign Companies (КІК)

Nearly every Ukrainian startup that seriously pursues venture capital sooner or later arrives at the same decision: register a parent company abroad, most often a Delaware C-Corp in the US. This isn't a trend or an attempt to "escape" Ukraine; it's a requirement of the capital market. But this step has a downside that founders consistently underestimate: the controlled foreign company tax obligations that automatically arise in Ukraine. Let's break down both sides.

Part I. Why Register a Company in the US at All?

The short answer: because that's what investors and buyers want. The longer answer is below.

Investor Requirement. American and most international funds invest in structures they are familiar with. The entire venture "deal infrastructure"—SAFEs, convertible notes, standard term sheets, employee stock option pools—is tailored specifically for US law. Proposing a company under Ukrainian law to a fund means creating extra work and risk for them, and thus, lowering your chances.

Predictable Corporate Law. The state of Delaware has mature legislation, a specialized court for corporate disputes (the Court of Chancery), and extensive case law. An investor understands their rights, protection mechanisms, and risks in advance, which reduces "legal uncertainty" to a minimum.

Access to Capital and Exits. Subsequent funding rounds and the sale of the business (exit) are almost always structured under foreign law—this is a buyer's requirement, not an option. Selling a company under Ukrainian law to a Western strategic buyer or raising a large round is significantly more difficult.

Infrastructure. A Delaware C-Corp opens up access to international banking, payment systems (like Stripe), convenient global hiring, and working with global clients.

Risk Mitigation. A stable jurisdiction for the holding company and intellectual property rights reassures investors—especially in times of war and uncertainty.

What a Typical Structure Looks Like

The classic setup for a Ukrainian tech startup is as follows:

• A holding company in the US — a Delaware C-Corp that raises investment, owns the intellectual property, and signs agreements with investors.
• A Ukrainian "subsidiary" — an R&D or service company where the development team is actually based. It provides services to the holding company under a contract.
• Sometimes, intermediary jurisdictions — Estonia, the United Kingdom, Cyprus—depending on the markets, tax treaties, and investor preferences.

It is this "US holding company + Ukrainian subsidiary" combination that creates the entire layer of Ukrainian tax obligations discussed below.

Part II. The Flip Side: CFC Rules

As soon as a resident of Ukraine becomes an owner or controller of a foreign company, they fall under the rules for controlled foreign companies (КІК). And this is the main thing founders underestimate: a foreign structure doesn't "remove" you from the Ukrainian tax field—it adds a new layer of obligations to it.

Who is Considered a Controlling Person

You are a controlling person of a CFC if you are a resident of Ukraine and at least one of the following conditions is met:

• you own a stake of more than 50% in a foreign company; or
• you own a stake of more than 10%, provided that residents of Ukraine collectively own 50% or more in that company; or
• you exercise de facto control (manage bank accounts, execute agreements, give binding instructions, etc.).

An important nuance that often causes confusion: the 25% threshold was transitional—it applied at the start of the rules' implementation (2022–2023). Moving forward, the 10% threshold applies, subject to the collective 50% ownership. For a typical startup where a founder owns a significant stake in the holding company, the control condition is almost always met.

What You Will Have to Do

A controller's obligations consist of two parts.

Notification. You must notify the tax authorities about the acquisition or disposal of a stake in a CFC or about the start/end of control—as a rule, within 60 days. This means the very act of registering the holding company creates an obligation, not something that happens later.

Annual CFC Report. It is filed along with the annual tax declaration and includes, among other things: the name and details of the CFC, the size of your stake, the ownership structure, financial statement data, a calculation of the adjusted profit, and the grounds for tax exemption, if any.

When You Will Have to Pay Tax

It's not the entire turnover that is taxed, but the adjusted profit of the CFC, proportional to your stake. For an individual, this profit is included in their total income and taxed with Personal Income Tax (ПДФО) at an 18% rate and the military levy (військовий збір). For certain cases, such as profit distribution, reduced rates may be available—this should be calculated on a case-by-case basis.

But the key lies in the broad exemptions. A CFC's profit is generally not taxed if at least one of the following conditions is met:

• the total income of all your CFCs does not exceed €2 million for the reporting year (the most common reason for early-stage startups); or
• there is a valid double taxation treaty between Ukraine and the CFC's jurisdiction (the US qualifies), and either the CFC pays tax at an effective rate of at least 13%, or the share of the CFC's passive income is less than 50% (meaning it's a real active business, not a "piggy bank" for dividends and royalties).

For most young startups, this is good news: their Delaware C-Corp will likely be exempt from the CFC tax—both due to the €2 million threshold and its status as an active business. But here lies the main trap.

Exemption from the tax does not exempt you from reporting. Even if a CFC's profit is not taxed, the obligation to file a CFC report and notification remains. This is where thousands of founders get tripped up: they think that if there's no tax, there's nothing to do—and end up with fines for non-filing.

Part III. What Else Does a Foreign Structure Entail

Transfer Pricing. Transactions between the Ukrainian subsidiary and the holding company are transactions between related parties. Above certain volumes, they fall under the rules for controlled transactions: the prices for development services must be at arm's length and supported by documentation. An understated or arbitrary price for the Ukrainian company's services is a typical reason for tax adjustments.

Currency Regulations. Receiving revenue from abroad, settling payments in foreign currency, and repatriating funds are all regulated by currency laws and require correct documentation.

Transparency is Increasing. With the automatic exchange of financial information (CRS), hiding the existence of a foreign company is becoming technically impossible: data on accounts and structures are sent to Ukraine automatically. In other words, the "don't report and hope for the best" strategy no longer works.

Wartime Does not Cancel Obligations. Although some relief measures are available for certain CFC violations committed during martial law (provided the violation is corrected within a specified period after it ends), the obligation to file reports and pay taxes on time remains. You shouldn't count on it "just going away."

Part IV. What Should a Founder Do

1. Design your structure intentionally, before incorporation. A Delaware C-Corp is a solution for raising investment and achieving an exit, not a way to "hide" taxes. Choose jurisdictions and a configuration based on your markets and funding round plans, together with a tax consultant.
2. Factor CFC compliance into your plan from the start. As soon as a foreign holding company is created, notification (within 60 days) and annual reporting requirements appear. Put it on your calendar instead of remembering it at the last minute.
3. Don't confuse "no tax" with "no obligation." Even an exempt CFC must be declared. This is the cheapest mistake to avoid—and the most common one.
4. Set up your transfer pricing between the subsidiary and the holding company so that the prices for services are at arm's length and backed by documentation.
5. Handle your IP correctly. The rights to the code and developments must be "cleanly" held by the holding company—this is the first thing an investor checks, and improperly structured rights can torpedo a deal during due diligence.

Conclusion

Registering a Delaware C-Corp is a logical and often unavoidable step for a startup that wants venture money and a global market. But it doesn't make the founder a person without a tax footprint in Ukraine: the CFC rules, transfer pricing, and currency regulations immediately kick in. The good news is that for most young startups, there will be no CFC tax—an exemption will apply. The bad news is that you still have to report, and it's the failure to file, not the tax itself, that most often becomes the problem.

The right answer here isn't "don't open a holding company," but "open one intentionally"—with a pre-designed structure and all compliance obligations covered. Then the foreign company works to attract investment, rather than creating a hidden debt to the tax authorities.

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This material is for analytical and informational purposes and does not constitute individual tax or legal advice. The CFC rules contain numerous nuances determined by the circumstances of a specific structure and clarifications (individual tax rulings, or ІПК) from tax authorities; rates, thresholds, and deadlines should be verified against the current version of the Tax Code of Ukraine as of the date a decision is made.