What Is the Branch Profits Tax and How Is It Calculated?

The branch profits tax is a 30% federal tax that a foreign corporation pays on the after-tax earnings of its U.S. branch that are treated as sent back to the home office abroad. It sits on top of the regular 21% corporate income tax the branch already pays on its U.S. business income, and it is calculated by applying the 30% rate to a figure called the dividend equivalent amount: the branch’s effectively connected earnings and profits for the year, adjusted up or down based on how much capital the corporation kept invested in the United States.¹

Why This Second Layer of Tax Exists

Without this tax, a foreign company could gain an edge over a domestic competitor by operating through a U.S. branch instead of a U.S. subsidiary. A subsidiary pays corporate income tax on its profits and then owes withholding tax when it sends dividends up to its foreign parent. A branch would pay only the first layer. Section 884 closes that gap by treating withdrawn branch earnings as if they were dividend payments from a subsidiary to a parent.¹

So a foreign corporation with a U.S. branch faces two federal income taxes. Section 882 imposes the regular corporate tax (currently 21%) on income effectively connected with the U.S. trade or business.² Section 884 then adds the 30% branch profits tax on the portion of after-tax earnings deemed repatriated.

Step 1: Effectively Connected Earnings and Profits

The calculation begins with effectively connected earnings and profits, or ECEP. This is the branch’s after-tax profit from U.S. operations for the year, figured without reducing for any distributions during that year.¹ The corporation isolates U.S. revenue from worldwide operations, subtracts the expenses and taxes allocable to that income, and applies the same earnings and profits rules a domestic corporation would use.

Some income never enters ECEP. Earnings from operating ships or aircraft are excluded when reciprocal exemptions apply under Section 883, and international organizations as defined in the tax code are exempt from the branch profits tax entirely.¹

Step 2: U.S. Net Equity

Next comes U.S. net equity, which measures how much capital the corporation keeps committed to its American branch. The statute defines it as U.S. assets minus U.S. liabilities, and the figure can go below zero if liabilities exceed assets.¹

U.S. assets are the money and property held for use in the American business. Typical examples include inventory, equipment, real estate, and cash. Each is valued at its adjusted basis for earnings and profits purposes: original cost adjusted over time for depreciation or improvements.¹ U.S. liabilities are the debts and obligations tied to the branch, such as accounts payable, accrued expenses, and branch loans. What remains after subtraction is a year-end snapshot of committed capital.

The number that actually matters for the tax is the change in U.S. net equity from the prior year-end to the current year-end.

Step 3: The Dividend Equivalent Amount

The dividend equivalent amount is the taxable base. Start with ECEP for the year, then adjust for the change in U.S. net equity.¹ The logic tracks the economics: earnings the corporation plows back into the branch aren’t leaving the country, so they shouldn’t be taxed as if they were dividends.

If U.S. net equity rose during the year, subtract the increase from ECEP. Higher net equity means more capital stayed in the United States, so less profit is treated as repatriated. If U.S. net equity fell, add the decrease to ECEP. Shrinking investment suggests previously retained earnings are now going home.

Two limits apply. The dividend equivalent amount cannot go below zero in any year. And when net equity has decreased, the add-back cannot exceed the corporation’s accumulated ECEP from all prior years (back to 1987) minus the dividend equivalent amounts already taxed in those years.³ The corporation can never be taxed on more than the branch has actually earned over its lifetime.

Step 4: Apply the 30% Rate

Multiply the dividend equivalent amount by 30%.¹ That is the branch profits tax for the year, owed in addition to the regular Section 882 corporate tax already paid on the underlying ECEP.

Treaty Reductions

The 30% statutory rate often drops for corporations resident in countries that have income tax treaties with the United States. Treaty rates on branch profits commonly fall to 5%, and in some cases to 0%, depending on the agreement.

To use a treaty rate, the corporation must be a “qualified resident” of its home country.¹ The regulations set out several ways to meet that standard, generally focused on ownership by home-country residents, being publicly traded in the home country, or actively conducting business there with the U.S. branch as an integral part of that business. A corporation that fits none of the paths can request a private ruling from the IRS.⁴

A treaty position must be disclosed on Form 8833, attached to Form 1120-F, identifying the treaty provision relied on and the dollar amount of tax reduced.⁵ Skipping the form triggers a $10,000 penalty per year under Section 6712, even when the reduced rate was properly available.⁶ With no treaty in place, the full 30% rate applies.

The Companion Branch-Level Interest Tax

Section 884(f) imposes a separate tax on certain interest tied to the U.S. branch, running on the same logic as the main tax. If the branch were a U.S. subsidiary, interest it paid would be subject to withholding, and this rule reproduces that result.

The tax targets “excess interest.” Take the total interest allocable to effectively connected income under the interest allocation regulations, then subtract the interest the branch actually paid to third parties. The remainder is treated as a notional interest payment from the branch to the foreign parent on the last day of the tax year, taxed at 30% under Section 881(a) unless a treaty reduces the rate.⁷

Two points catch corporations off guard. The portfolio interest exemption is unavailable because the notional payment is deemed made to a related party (the foreign parent). And any treaty claim on excess interest looks to the treaty with the country of the foreign parent, not any treaty applicable to the branch itself. Excess interest is reported in Section III, Part II of Form 1120-F.

Exemption for Complete Termination

A corporation that fully shuts down its U.S. business can escape the branch profits tax for the termination year, but the requirements are strict. By year-end (or, for a dissolving corporation, before the close of the following year), the corporation must have no remaining U.S. assets. Neither the corporation nor any related corporation may use former U.S. branch assets in an American trade or business for three years after the termination year.⁸

The corporation must also file Form 8848, which extends the IRS’s assessment window for the branch profits tax to at least six years after the termination year, signed by the person authorized to sign the return and filed with the termination-year return.⁹ Break any condition and the corporation owes the tax it would have paid for the termination year and any other affected years. When the exemption applies, accumulated ECEP as of year-end is eliminated for branch profits tax purposes, though it still matters for other parts of the tax code, such as dividend characterization and corporate liquidation rules.

Filing the Return

The branch profits tax is reported on Form 1120-F, Section III, Part I. The branch-level interest tax, if any, goes in Section III, Part II. A treaty-based reduction requires an attached Form 8833.¹⁰

Due dates depend on whether the corporation has a U.S. office. A corporation with a U.S. office or place of business generally files by the 15th day of the fourth month after year-end (April 15 for calendar-year filers), with an automatic extension to the 15th day of the sixth month that requires no separate filing.¹¹ A corporation with no U.S. office files by the 15th day of the sixth month after year-end (June 15 for calendar-year filers).¹² Form 7004 buys an additional four-month extension for C corporations, which includes foreign corporations filing Form 1120-F. Deadlines that fall on a weekend or holiday shift to the next business day.

What Late or Missing Returns Cost

The penalty structure goes well beyond ordinary late fees. If Form 1120-F isn’t filed before the earlier of an IRS notification or 18 months after the due date, the corporation loses the right to claim deductions and credits against its effectively connected income. The IRS can then tax gross effectively connected income at the full corporate rate, with no offsets.⁶ That change alone can multiply the tax bill.

On top of that, the late-filing penalty is 5% of unpaid tax per month or partial month, capped at 25%. The late-payment penalty runs 0.5% per month, also capped at 25%. Interest accrues on both the unpaid tax and the penalties from the original due date.¹⁰ For a return required in 2026 that is more than 60 days late, the minimum penalty is the lesser of the tax due or $525. And missing Form 8833 when a treaty rate is claimed adds a separate $10,000 penalty per year.

1
Office of the Law Revision Counsel. 26 USC 884 – Branch Profits Tax
2
Office of the Law Revision Counsel. 26 USC 882 – Tax on Income of Foreign Corporations Connected With United States Business
3
eCFR. 26 CFR 1.884-1 – Branch Profits Tax
4
eCFR. 26 CFR 1.884-5 – Qualified Resident
5
Internal Revenue Service. Form 8833 – Treaty-Based Return Position Disclosure Under Section 6114 or 7701(b)
6
Internal Revenue Service. IRM 4.61.14 – Guidelines for Handling Delinquent Forms 1120-F
7
Internal Revenue Service. Branch-Level Interest Tax Concepts
8
eCFR. 26 CFR 1.884-2T – Special Rules for Termination or Incorporation of a U.S. Trade or Business
9
eCFR. 26 CFR 1.884-2 – Special Rules for Termination or Incorporation of a U.S. Trade or Business
10
Internal Revenue Service. 2025 Instructions for Form 1120-F
11
Internal Revenue Service. Instructions for Form 7004
12
Internal Revenue Service. Instructions for Form 1120-F