The United States withholds 30% of dividends paid by American companies to foreign investors, and that tax is deducted at the source before any money reaches the investor’s account. A tax treaty between the US and the investor’s country of residence can bring that rate down, most commonly to 15% for individual portfolio holders, but only if a signed W-8 form is on file with the broker or paying agent before the dividend is paid. The US dividend withholding tax for foreign investors is the rule that governs how much of a US stock’s payout actually leaves the country, and the paperwork attached to it decides whether you pay the full rate or the treaty rate.
The 30% Default Rate
Federal law requires anyone paying US-source income to a nonresident alien individual or foreign partnership to withhold tax equal to 30% of the gross payment.1Office of the Law Revision Counsel. 26 USC 1441 – Withholding of Tax on Nonresident Aliens A parallel rule applies the same 30% to dividends received by foreign corporations.2Office of the Law Revision Counsel. 26 USC 881 – Tax on Income of Foreign Corporations Not Connected With United States Business The tax comes off the gross dividend. No deductions for expenses or costs are allowed against it.
The IRS classifies dividends as “fixed, determinable, annual, or periodical” (FDAP) income, the same category that covers interest, rents, and royalties.3Internal Revenue Service. Fixed, Determinable, Annual, or Periodical (FDAP) Income It’s passive investment income flowing to someone outside the country, which is why the flat rate applies instead of the graduated rates US residents pay.
The 30% rate is also the fallback for any account with no documentation on file. If the withholding agent, usually a US broker or custodian, doesn’t have a valid W-8 for the investor, it withholds the full 30% automatically. That withholding is generally treated as the final US tax on the dividend, and the foreign recipient doesn’t need to file a US return unless they want to reclaim an over-withheld amount.4Internal Revenue Service. Federal Income Tax Withholding and Reporting on Other Kinds of US Source Income Paid to Nonresident Aliens
How a Tax Treaty Lowers the Rate
The US has income tax treaties with dozens of countries, and most of them override the 30% default on dividends. The purpose is to keep the same income from being taxed in full by both the US and the investor’s home country. The IRS publishes a treaty table listing the negotiated rates, and the differences are substantial.5Internal Revenue Service. Table 1 – Tax Rates on Income Other Than Personal Service Income Under Chapter 3
For most individual portfolio investors, treaties cut the rate to 15%. Corporate shareholders that own at least 10% of the voting stock in the US company often qualify for rates of 5% or even 0%, depending on which treaty applies.5Internal Revenue Service. Table 1 – Tax Rates on Income Other Than Personal Service Income Under Chapter 3 The exact percentage depends on what the two countries negotiated, so check the treaty text for your country before assuming a rate.
Beneficial Ownership and Limitation on Benefits
Two gatekeeping concepts control whether a foreign investor actually qualifies for the treaty rate. The first is beneficial ownership: the person claiming the reduced rate must be the one genuinely entitled to the income, not a conduit or intermediary holding it on someone else’s behalf.
The second is the Limitation on Benefits (LOB) clause built into nearly every modern US tax treaty. LOB provisions are anti-abuse rules meant to stop residents of countries without a favorable US treaty from routing investments through a treaty-country entity to grab the lower rate. The IRS maintains a separate reference table listing LOB provisions by treaty.6Internal Revenue Service. Table 4 – Limitation on Benefits To pass, the investor must be a “qualified person” under tests looking at where the entity’s operations are, who owns its stock, and whether it has real economic substance in the treaty country. For an individual, actual residency in the treaty country is the key requirement. A postal address won’t do it. Failing the LOB tests puts the full 30% rate back in play regardless of where the investor claims to live.
Filing the W-8: The Paperwork That Triggers the Lower Rate
Treaty rates are not automatic. The investor has to file a form from the IRS W-8 series with the withholding agent before the dividend is paid. Without it, the broker withholds at 30%.
W-8BEN for Individuals
Individual foreign investors use Form W-8BEN to certify their foreign status and claim any applicable treaty rate.7Internal Revenue Service. About Form W-8 BEN, Certificate of Foreign Status of Beneficial Owner for United States Tax Withholding and Reporting (Individuals) The form confirms the investor is not a US person and is the beneficial owner of the income. Part II is where treaty benefits are claimed. Line 9 asks for the treaty country, and Line 10 covers any special conditions the treaty requires.8Internal Revenue Service. Instructions for Form W-8BEN (Rev. October 2021)
A foreign taxpayer identification number (TIN) is generally required to claim treaty benefits. Exceptions exist for residents of jurisdictions that don’t issue TINs or that restrict their disclosure, and the IRS tracks those on a published list.9Internal Revenue Service. List of Jurisdictions That Do Not Issue Foreign TINs Investors who need a US identifier but aren’t eligible for a Social Security number can apply for an Individual Taxpayer Identification Number (ITIN) using Form W-7, which requires an original or certified-copy passport or two supporting identity documents.10Internal Revenue Service. ITIN Supporting Documents
W-8BEN-E for Entities
Foreign corporations, partnerships, and other entities use the longer Form W-8BEN-E.11Internal Revenue Service. Instructions for Form W-8BEN-E (10/2021) The entity identifies its Chapter 3 classification (corporation, partnership, trust, and so on) and its Chapter 4 status under FATCA. Treaty benefits go in Part III, where the entity certifies its treaty country, confirms it derives the income, and checks a box indicating how it satisfies the LOB requirements.12Internal Revenue Service. Form W-8BEN-E (Rev. October 2021)
Expiration, Errors, and What Voids the Form
A completed W-8BEN stays valid from the date it is signed through the last day of the third succeeding calendar year. A form signed at any point in 2026 expires on December 31, 2029.8Internal Revenue Service. Instructions for Form W-8BEN (Rev. October 2021) If the investor’s circumstances change, such as moving to a different country, the form becomes invalid immediately and a new one must be filed.
Small errors matter more than most investors expect. A missing signature, an incomplete foreign address, or a blank TIN field where one is required will cause the withholding agent to disregard the form and apply the full 30%. The form is signed under penalties of perjury, and the withholding agent has no obligation to chase down mistakes. The agent uses the information on the W-8 to complete Form 1042-S, the annual return reporting payments to foreign persons, which goes to both the IRS and the recipient.13Internal Revenue Service. Instructions for Form 1042-S (2026)
FATCA: A Separate 30% You Also Need to Clear
Even after the treaty rules are satisfied, a second regime can impose its own 30% withholding on the same payment. The Foreign Account Tax Compliance Act (FATCA), Chapter 4 of the Internal Revenue Code, requires foreign financial institutions to identify and report their US account holders to the IRS. If a foreign bank or brokerage hasn’t entered a reporting agreement with the IRS, or isn’t complying with one, any “withholdable payment” to that institution takes a 30% hit.14Office of the Law Revision Counsel. 26 USC 1471 – Withholdable Payments to Foreign Financial Institutions
US-source dividends fall squarely within the definition of a withholdable payment. The same 30% also applies to payments made to non-financial foreign entities that don’t certify the identity of their substantial US owners. In practice, most major foreign financial institutions have signed FATCA agreements or are covered by an intergovernmental agreement between the US and their home country, so investors at large brokerages rarely see this withholding. But investors who hold US stocks through an institution in a country without a FATCA arrangement, or through a non-compliant entity, can be hit with the full 30% on top of whatever Chapter 3 rate would otherwise apply. That’s why the W-8BEN-E asks entities to identify their Chapter 4 status: the withholding agent has to verify FATCA compliance before releasing the payment at any reduced treaty rate.
Dividends That Don’t Follow the Standard Rule
Some payments labeled “dividends” don’t fit the 30%-or-treaty-rate pattern. A few categories have their own rules.
Effectively Connected Income
When a foreign person earns dividends through an active US trade or business, those dividends become “effectively connected income” (ECI). ECI is pulled out of the flat 30% regime and taxed instead at the graduated rates that apply to US persons, on a net basis, so related business expenses can be deducted. To stop the withholding agent from taking 30% off the top, the foreign person files Form W-8ECI certifying that the income is connected to their US business.15Internal Revenue Service. Instructions for Form W-8ECI (Rev. October 2021) The investor then reports the income on Form 1040-NR.16Internal Revenue Service. About Form 1040-NR, US Nonresident Alien Income Tax Return
REIT Dividends and FIRPTA
Real estate investment trusts add a wrinkle. The ordinary income portion of a REIT dividend is treated like any other dividend and gets the 30% rate or applicable treaty rate. But when a REIT distributes gains from selling US real property, that portion is treated as income from the sale of a US real property interest under the Foreign Investment in Real Property Tax Act (FIRPTA). The REIT withholds on that portion at the highest corporate tax rate under Section 11(b), currently 21%.17Office of the Law Revision Counsel. 26 USC 1445 – Withholding of Tax on Dispositions of United States Real Property Interests FIRPTA withholding doesn’t shift based on treaty status. It applies regardless of the investor’s home country.
Dividend Equivalents on Derivatives
Certain payments on equity-linked derivatives are treated as if they were actual US dividends. Under Section 871(m), a “dividend equivalent” includes substitute dividend payments in securities lending transactions and payments under equity swaps or structured products that reference US stock dividends.18Office of the Law Revision Counsel. 26 USC 871 – Tax on Nonresident Alien Individuals These payments face the same 30% withholding, or lower treaty rate, as actual dividends. Treasury regulations currently apply the rule to equity-linked instruments with a delta of 0.8 or greater relative to the underlying US stock. The IRS has announced that expanded coverage for non-delta-one transactions is scheduled to take effect for instruments issued on or after January 1, 2027. A foreign investor holding a total return swap on US equities faces the same withholding as someone holding the shares directly, even though no shares change hands.
Interest-Related Dividends From Mutual Funds
Mutual funds and many ETFs (regulated investment companies) can designate a portion of their distributions as “interest-related dividends.” When a fund earns income from sources that would qualify for the portfolio interest exemption if earned directly, such as interest on registered US corporate bonds, it can pass that exemption through to foreign shareholders. The designated portion is exempt from the 30% withholding entirely.18Office of the Law Revision Counsel. 26 USC 871 – Tax on Nonresident Alien Individuals The fund must report the designation in writing, and the exemption doesn’t apply if the foreign investor owns 10% or more of the fund’s issuer or if certain related-party rules are triggered.
Claiming a Refund When Too Much Was Withheld
Foreign investors who had too much tax withheld, for example because a broker applied 30% when a treaty entitled them to 15%, can file Form 1040-NR to claim a refund of the excess.19Internal Revenue Service. Instructions for Form 1040-NR (2025) The IRS provides a simplified filing procedure for nonresident aliens whose only reason for filing is to recover over-withheld tax under Chapter 3 or Chapter 4.
The process isn’t quick. Processing times vary, and the IRS wants supporting documentation, including copies of Form 1042-S showing the amounts withheld. Getting the W-8 on file before dividends are paid is far more reliable than filing a refund claim afterward. Refunds are a backstop, and they pull the investor into direct engagement with the US tax system that a timely W-8 avoids entirely.