FDII: A Tax Break for U.S. Export Income

Key Takeaways

• FDII is a deduction that lowers U.S. tax on income earned serving foreign markets.
• Through 2025 the deduction was 37.5 percent, giving an effective rate near 13.125 percent.
• A frequent error is claiming FDII on domestic sales; only foreign-derived income qualifies.
• A 2025 law renamed the base and reset the deduction to 33.34 percent.

What FDII Is

FDII is part of Internal Revenue Code section 250, the same provision that grants the GILTI deduction. It gives a domestic C corporation a deduction against income that is derived from serving foreign markets, such as exports of property, licenses to foreign users, and services provided to people located abroad.

The original 2017 design centered on a return above a routine return on tangible assets, the mirror of the GILTI calculation. The idea was to favor income attributable to intangible value created in the United States but earned abroad. A 2025 law restructured the base and renamed it foreign-derived deduction eligible income, while keeping the core goal of taxing export-linked income at a reduced rate.

The Intuition

GILTI taxes excess profit earned through foreign subsidiaries. FDII does the opposite. It rewards a U.S. company that earns the same kind of high-margin, intangible-rich income from inside the United States by selling to foreign customers.

Together they aim to make the choice of where to hold intangible assets more neutral. If foreign profit is taxed by GILTI and domestic export profit is favored by FDII, the tax incentive to move patents and operations offshore shrinks. The deduction is the lever that brings the domestic export rate below the regular corporate rate.

How It Works

FDII applies only to C corporations. The corporation identifies its deduction eligible income, isolates the portion derived from foreign use, applies the formula, and claims the deduction on Form 8993.

Foreign-derived ratio = foreign-derived income / total deduction eligible income
FDII                  = qualifying income x foreign-derived ratio
Deduction (through 2025) = 37.5% of FDII
Effective rate        = 21% x (1 - 0.375) = ~13.125%

Through tax years ending in 2025, the section 250 deduction equaled 37.5 percent of FDII, which at a 21 percent corporate rate produced an effective rate of about 13.125 percent. For tax years beginning after 2025, the deduction is 33.34 percent, raising the effective rate modestly, and the income base was redefined. Documentation of foreign use is essential, since the company must prove the customer or user is outside the United States.

Worked Example

Suppose a U.S. software corporation has 10,000,000 dollars of deduction eligible income, of which 6,000,000 dollars comes from licensing to foreign users.

Foreign-derived ratio = 6,000,000 / 10,000,000 = 60%
FDII                  = 6,000,000 (the foreign-derived portion)
Deduction (37.5%)     = 2,250,000
Taxable FDII          = 3,750,000
Tax at 21%            = 787,500  (effective ~13.125% of 6,000,000)

The 60 percent of income tied to foreign use is taxed at the reduced FDII rate, while the 40 percent from domestic customers stays at the full 21 percent rate.

Common Mistakes

1. Claiming FDII on domestic sales. Only income derived from foreign use qualifies. Domestic-market income gets no FDII benefit.

2. Skipping documentation. The company must substantiate that property or services reached a foreign user. Weak records can disallow the deduction.

3. Assuming individuals qualify. FDII is a corporate deduction. Pass-through owners and individuals do not claim it directly.

4. Using the old deduction rate. The 2025 law reset the percentage. Applying 37.5 percent to a post-2025 year overstates the deduction.

5. Ignoring the GILTI link. FDII and GILTI share section 250 and a taxable income limitation. A change in one can affect the allowed deduction for the other.

Frequently Asked Questions

What is FDII in simple terms? FDII is a tax break that lowers the rate a U.S. corporation pays on profit it earns by selling to customers in other countries. It rewards companies for serving foreign markets from inside the United States.

How does FDII affect investment decisions? FDII reduces the after-tax cost of export-oriented and intellectual-property income held domestically, which can influence where a company chooses to locate intangible assets. The worked example shows how the foreign-derived ratio drives the benefit.

What is a real-world example of FDII? A U.S. software company that licenses 6,000,000 dollars of its 10,000,000 dollars of income to foreign users applies the FDII deduction to that 60 percent, lowering the tax on the export-linked portion.

How can investors avoid problems with FDII? Keep clear records proving foreign use, separate domestic from foreign-derived income, and apply the current-year deduction percentage. A tax adviser can confirm the interaction with the GILTI deduction and any taxable income limit.

How is FDII different from GILTI? FDII is a deduction that lowers tax on export income earned through a domestic corporation, while GILTI is an inclusion that taxes excess profit earned through foreign subsidiaries. One is a reward, the other a charge, but both sit in section 250.

Sources

1. Cornell Legal Information Institute. "26 U.S.C. 250 - Foreign-derived deduction eligible income and net CFC tested income." https://www.law.cornell.edu/uscode/text/26/250
2. IRS. "About Form 8993, Section 250 Deduction for Foreign-Derived Intangible Income (FDII) and Global Intangible Low-Taxed Income (GILTI)." https://www.irs.gov/forms-pubs/about-form-8993
3. IRS. "Tax Cuts and Jobs Act, summary of changes to international tax provisions." https://www.irs.gov/businesses/international-businesses/tax-cuts-and-jobs-act-of-2017-summary-of-changes-to-international-tax-provisions
4. Cornell Legal Information Institute. "26 U.S.C. 951A - Net CFC tested income included in gross income of United States shareholders." https://www.law.cornell.edu/uscode/text/26/951A

Disclaimer

This article is educational content only and is not financial advice. Nothing here is a recommendation to buy, sell, or hold any security. Consult a licensed advisor before making investment decisions.