Setting up operations overseas used to be a way to defer US tax: earn profit in a foreign subsidiary, leave it abroad, and pay US tax only when the money came home. The 2017 tax law largely ended that. Today a US owner of a foreign corporation is often taxed on the foreign profits the year they're earned, through a regime called GILTI, whether or not a single dollar is distributed. Layer on the controlled foreign corporation (CFC) rules, Subpart F income, and the reporting weight of Form 5471 — with its $10,000-per-form penalty — and outbound expansion becomes a tax project, not just a business one.
The good news is that the framework is knowable and the planning levers are real. Whether you operate as a foreign branch or a foreign subsidiary changes when and how you're taxed. Your US entity type — C corporation versus individual or pass-through — changes how hard GILTI hits. And getting Form 5471 filed correctly and on time protects your return's statute of limitations. This guide walks a US business owner through what actually happens to their taxes when they cross a border.
When your foreign company becomes a CFC
The whole outbound regime turns on one status: is your foreign corporation a controlled foreign corporation? A foreign corporation is a CFC when US shareholders — counting only those who each own 10% or more of its vote or value — together own more than 50% of the stock, by vote or value, on any day of the year.
That definition catches more owners than people expect. A single US person who owns all of a foreign company is obviously a CFC owner. But so is a group of unrelated US investors who each hold a chunk and collectively cross 50%. Constructive-ownership rules can also attribute stock held by family members or related entities to you, so the "10% shareholder" test is broader than a plain reading suggests.
| Test | Threshold | Why it matters |
|---|---|---|
| Who is a "US shareholder" | Owns 10%+ of vote or value | Only these owners count toward CFC status and bear GILTI/Subpart F |
| When it's a "CFC" | US shareholders own more than 50% | Flips on the current-taxation regime |
| Constructive ownership | Family & related-entity attribution | Can pull you over a threshold you didn't cross directly |
Once the corporation is a CFC, its 10% US shareholders step into a world where foreign profits can be taxed to them currently. If US owners stay at or below the 50% line — a genuine joint venture with a controlling foreign partner, for instance — the CFC rules may not apply at all. The status is the hinge, so it's worth confirming before, not after, you structure the deal.
Subpart F: the original anti-deferral rule
Long before GILTI, Subpart F already pulled certain kinds of easily-movable foreign income into US tax immediately. Subpart F targets passive and mobile income — dividends, interest, rents, royalties, and certain related-party sales and services income (foreign base company income) — that a business could otherwise park in a low-tax jurisdiction.
If your CFC earns this kind of income, its 10% US shareholders include their share in US income the year it's earned, regardless of distributions. Active business earnings — running a real factory, shop, or service operation abroad — generally escaped Subpart F, which is exactly the gap GILTI was written to close.
Subpart F (and GILTI, by election) contains a high-tax exception: income already taxed abroad above a threshold tied to the US corporate rate can be excluded from the current inclusion. If your foreign operation sits in a normal-rate country rather than a tax haven, this exception can materially reduce or eliminate the current US pickup. It's elective and detail-heavy — the kind of thing to model, not assume.
GILTI: why active foreign profit is now taxed every year
GILTI — Global Intangible Low-Taxed Income — is the regime that changed outbound planning most. Despite the name, it isn't limited to intangibles. In practice, GILTI sweeps in most active earnings of a CFC above a routine 10% return on the CFC's tangible depreciable assets. A 10% US shareholder includes that excess in income annually, whether or not it's distributed.
How much GILTI actually costs depends heavily on your US entity type. A C corporation gets a deduction against its GILTI inclusion and can claim a foreign tax credit for most of the foreign taxes the CFC paid, which together often drive the residual US rate down substantially. An individual or pass-through owner gets neither automatically — and can face full US rates on GILTI unless they plan around it.
C corporation owner of the CFC
- Gets the GILTI deduction (Section 250)
- Can claim indirect foreign tax credits on CFC-level taxes
- Effective US rate on GILTI is materially reduced
- Simplest path to a tolerable outbound tax bill
Individual / pass-through owner
- No GILTI deduction by default
- No automatic credit for foreign corporate tax
- Can face full ordinary rates on GILTI
- Often plans via a Section 962 election or a US C-corp blocker
An individual CFC shareholder can make a Section 962 election to be taxed on GILTI and Subpart F as if they were a C corporation — capturing the deduction and the corporate-level foreign tax credit. It doesn't fit every situation, but for a US individual owning a profitable foreign operation, running the numbers with and without a 962 election (or a US C-corp holding structure) is one of the highest-value planning steps available.
Foreign branch vs. foreign subsidiary: the structure decision
Before you incorporate anything abroad, decide whether the foreign operation should be a branch of your US business or a separate foreign subsidiary. This is the single most consequential structural choice, and it isn't purely a tax question — liability, local regulation, and banking all weigh in — but the tax consequences are sharp.
A branch (including a foreign disregarded entity) is not a separate taxpayer for US purposes. Its income and, crucially, its losses flow straight onto your US return in real time. That's a genuine advantage in a venture's early, money-losing years. A subsidiary is a separate foreign corporation: it can wall off liability, may defer some tax, and can be the right long-term home — but it turns on CFC status, GILTI, Subpart F, and Form 5471.
| Factor | Foreign branch | Foreign subsidiary |
|---|---|---|
| Early losses | Flow onto US return immediately | Trapped in the foreign entity |
| Ongoing profits | Taxed to you currently in full | GILTI/Subpart F may apply; some deferral possible |
| Liability shield | None — it's you abroad | Separate legal entity |
| Reporting | Form 8858 (foreign branch/DRE) | Form 5471 (foreign corporation) |
| Common fit | Early-stage or loss-generating ventures | Established, profitable operations |
A frequent pattern is to start as a branch to use early losses on the US return, then convert to a subsidiary once the operation turns profitable and the CFC/GILTI machinery becomes worth the deferral and liability benefits. The conversion itself has tax consequences, so it belongs in the original plan rather than as an afterthought.
Form 5471 and the compliance you can't skip
The reporting obligations are where outbound owners get hurt most often, because the penalties are automatic and steep. Form 5471 is the information return a US person files when they're an officer, director, or 10%-or-more shareholder of certain foreign corporations. It reports ownership, the foreign company's income statement and balance sheet, and the GILTI/Subpart F figures.
The penalty for filing late, incompletely, or not at all starts at $10,000 per form, per year, with additional amounts for continued failure after IRS notice. Worse, a missing Form 5471 can hold the statute of limitations on your entire tax return open — meaning the IRS can revisit the whole return years later, not just the foreign piece.
- Form 5471 — for 10%+ ownership of a foreign corporation (CFC and some others)
- Form 8858 — for a foreign branch or foreign disregarded entity
- Form 8992 — to compute the GILTI inclusion
- Form 1118 (corporations) or 1116 (individuals) — to claim the foreign tax credit
- FBAR (FinCEN 114) and Form 8938 — for foreign financial accounts, if thresholds are met
None of these is optional, and several interlock — the GILTI number on Form 8992 flows from the Form 5471 figures, which flow from the foreign entity's books kept in a foreign currency. Building clean, US-GAAP-translatable bookkeeping abroad from day one is what makes the annual filings a data-entry exercise instead of a reconstruction project.
Expanding abroad no longer defers US tax by default. Confirm CFC status first — 10% US shareholders owning more than 50% flips on current taxation. Expect GILTI to reach most active foreign profit every year, and know that a C corporation absorbs it far better than an individual (where a Section 962 election or a C-corp blocker may be the fix). Choose branch versus subsidiary deliberately: branches use early losses now, subsidiaries defer and shield later. Then file Form 5471, 8858, and 8992 on time — the $10,000 penalties are automatic and can freeze your whole return open. Structure the tax plan before you cross the border, not after.
Expanding overseas? Get the tax structure right first.
Expanding abroad raises real US tax questions — from branch-vs-subsidiary to GILTI exposure to your filing obligations. Talk to our team before you set up the structure, so growth abroad doesn't turn into a surprise US tax bill.
Talk to a tax proSources
- IRC Section 957 — Controlled Foreign Corporations
- IRC Section 951A — Global Intangible Low-Taxed Income (GILTI)
- IRC Section 250 — Deduction for GILTI and FDII
- IRS — Instructions for Form 5471 (Information Return of US Persons With Respect to Certain Foreign Corporations)
- IRS — Instructions for Form 8992 (US Shareholder Calculation of GILTI)
- IRC Section 6038(b) — Penalties for failure to furnish information on foreign corporations
Frequently asked questions
A foreign corporation is a CFC when US shareholders — each owning 10% or more of vote or value — together own more than 50% of the corporation's stock. Once it's a CFC, its 10% US shareholders can be taxed on their share of certain foreign income (Subpart F and GILTI) whether or not the corporation distributes a dime.
Generally yes. GILTI (Global Intangible Low-Taxed Income) requires 10% US shareholders of a CFC to include most of the CFC's active earnings in US income each year, above a routine 10% return on tangible assets. C corporations get a deduction and a foreign tax credit that soften it; individuals often pay more unless they plan for it.
A branch's profits and losses flow onto your US return immediately — useful early on when the venture is losing money. A subsidiary is a separate foreign corporation that can defer some tax and limit liability, but triggers CFC rules, GILTI, and Form 5471. The right answer depends on whether you expect early losses, the foreign tax rate, and your US entity type.
US persons who are officers, directors, or 10%-or-more shareholders of certain foreign corporations must file Form 5471 with their return. The penalty starts at $10,000 per form per year for late or missing filings, with more for continued failure — and it can keep your whole return's statute of limitations open until you file.
