FDAP Income

FDAP income, short for fixed, determinable, annual, or periodical income, is the category of US-source income that triggers NRA withholding when it is paid to a foreign person. It is the income side of chapter 3 of the Internal Revenue Code: if a payment to a nonresident is US-source FDAP income, the payer generally must withhold 30 percent under IRC section 1441, which directs withholding “a tax equal to 30 percent” on such income. The IRS defines and lists the categories on its FDAP income page, and the full mechanics live in Publication 515. For a US company paying foreign contractors, FDAP is the concept that decides whether a payment falls into the withholding regime at all.

What FDAP Means

The IRS breaks the term into its parts:

• Fixed. “Income is fixed when it is paid in amounts known ahead of time.”
• Determinable. “Income is determinable whenever there is a basis for figuring the amount to be paid.”
• Periodical. Income “can be periodic if it is paid from time to time. It does not have to be paid annually or at regular intervals.”

The IRS also notes that income “can be FDAP income whether it is paid in a series of repeated payments or in a single lump sum.” This is broad on purpose. Most ordinary, non-investment-gain income to a foreign person is FDAP.

Examples of FDAP Income

The IRS lists these categories as FDAP:

• Compensation for personal services
• Dividends
• Interest
• Pensions and annuities
• Alimony
• Real property income, such as rents (other than gains from the sale of real property)
• Royalties

For contractor payments, the line that matters most is compensation for personal services. A consulting fee, a design fee, or a development fee paid to a foreign person is FDAP. Whether it is taxable in the US then depends on whether it is US-source, which the source of income rules decide based on where the work is performed.

Why FDAP Matters for Contractor Payments

FDAP status alone does not create a US tax. Two things have to line up: the income must be FDAP, and it must be US-source. A foreign contractor’s fee is FDAP, but if the work is done abroad it is foreign source income, which sits outside chapter 3 withholding and is not reportable on Form 1042-S. If the work is done in the US, the fee is US-source FDAP income, and the 30 percent default applies unless a treaty cuts it.

The withholding flows in a predictable order:

1. The payer confirms the payee is a foreign person, usually with a Form W-8BEN or Form W-8BEN-E.
2. The payer applies the source rules to decide if the FDAP income is US-source.
3. If US-source, the payer withholds 30 percent, or a lower income tax treaty rate documented on the W-8 or Form 8233.
4. The payer reports on Form 1042-S regardless of whether tax was withheld.

FDAP Versus Effectively Connected Income

The most important contrast is FDAP versus effectively connected income. The two are taxed in opposite ways:

• FDAP is taxed on the gross amount at a flat 30 percent. No deductions. Collected by withholding at the source.
• ECI is income connected with a US trade or business, taxed on a net basis at graduated rates, the same way a US person is taxed. A foreign person documents ECI on Form W-8ECI to take the income out of the 30 percent FDAP withholding.

A payment cannot be both at once. If income is effectively connected, it is taxed as ECI rather than as FDAP. Getting this wrong means either over-withholding on business income or under-withholding on passive income.

Common Pitfalls

• Confusing FDAP status with US tax liability. A foreign contractor’s fee is always FDAP, but only the US-source portion is within the withholding regime. Foreign-source FDAP income to a nonresident is generally not US-taxable.
• Forgetting that single payments count. A one-time lump-sum fee is still FDAP. Periodical does not mean recurring.
• Treating ECI as FDAP. If the foreign person is in a US trade or business, the income may be ECI. Withholding 30 percent flat on what is really net-basis business income is a documentation failure cured by Form W-8ECI.
• Skipping the 1042-S because nothing was withheld. US-source FDAP income is reportable on Form 1042-S even at a zero treaty rate.

Related Forms and Terms

• NRA Withholding: the regime that taxes US-source FDAP income.
• Effectively Connected Income (ECI): the net-basis alternative to flat FDAP taxation.
• Source of Income Rules: decide whether FDAP income is US-source.
• Form 1042-S: the return that reports US-source FDAP income paid to foreign persons.
• IRS Publication 515: the IRS guide that details FDAP categories and withholding.

Omnivoo Contract Management classifies each foreign contractor payment by FDAP category and source, so a withholding agent knows exactly which payments enter the 30 percent regime and which stay outside it.