US Dividend Withholding for Nonresident Investors

Two returns, two regimes

A US share produces a dividend and, if it is sold at a profit, a capital gain. From the perspective of a nonresident investor these are not variations on one tax. They sit under different rules, and the difference is large enough to change how a portfolio is built.

Dividends are fixed, determinable, annual or periodical income — FDAP, in the language of the code. They are taxed at a flat statutory rate on the gross amount, and the tax is collected by the payer before the money moves.

Capital gains on a portfolio of listed shares are generally not taxed at all for a nonresident alien who is not present in the United States for 183 days or more and whose gain is not connected to a US trade or business. There is no withholding on the sale, because there is no tax to withhold.

The asymmetry explains a lot of otherwise puzzling behaviour: why some foreign investors prefer accumulating vehicles over dividend-paying ones, why a swap or a contract for difference can be more tax-efficient than the underlying shares, and why the W-8BEN is one of the few forms worth signing on day one.

The statutory default is 30 per cent

Publication 515 states the starting position directly: “In most cases, a foreign person is subject to U.S. tax on its U.S. source income. Most types of U.S. source income received by a foreign person are subject to U.S. tax of 30%. A reduced rate, including exemption, may apply if there is a tax treaty between the foreign person’s country of residence and the United States. The tax is generally withheld (chapter 3 withholding) from the payment made to the foreign person.”

Three elements matter in that paragraph.

It is the payer’s obligation, not the investor’s. The withholding agent deducts before paying. If the agent gets it wrong, the investor’s remedy is a tax return, not a complaint.

The rate applies to the gross amount. A dividend of 100 is taxed on 100, regardless of what the position cost or what the broker charged to hold it.

Documentation changes the rate. The same publication sets out the practical consequence for the payer: “For purposes of chapter 3, in most cases, you must withhold 30% from the gross amount paid to a foreign payee unless you can reliably associate the payment with valid documentation that establishes” the applicable rate. The default is not a placeholder that gets corrected later; it is what happens when no valid form is on file.

What the treaty does — and what it cannot do

The instrument that reduces the rate is a tax treaty, and the treaty does not operate by itself. It operates through a claim, which is made on a form, which the broker passes to the payer.

The US–China treaty is a useful example because its dividends article is unusually simple. Article 9(2) provides that dividends “may also be taxed in the Contracting State of which the company paying the dividends is a resident, and according to the laws of that Contracting State, but if the recipient is the beneficial owner of the dividends the tax so charged shall not exceed 10 percent of the gross amount of the dividends.”

Two features are worth noticing:

• 10 per cent, flat. Many treaties split the rate — a lower rate for a company that owns a substantial stake, a higher one for a portfolio investor. The China treaty does not; the rate is 10 per cent for any beneficial owner who qualifies.
• Beneficial owner, not nominee. A person receiving the dividend as an agent or custodian is not the beneficial owner, and Article 9(2) is written for the person who is.

A treaty cannot be claimed by a person who is not a resident of the treaty country under that country’s own rules. That is what the form is for.

Form W-8BEN: what it certifies

The W-8BEN is the individual’s certificate of foreign status. Its instructions define who may sign it: “Any individual who is not a citizen or resident alien of the United States is a nonresident alien individual. An alien individual meeting either the ‘green card test’ or the ‘substantial presence test’ for the calendar year is a resident alien.” A resident alien cannot use the form to claim treaty benefits; a nonresident can.

The instructions also fix the address rule, which is stricter than it looks: the permanent residence address is “the address in the country where you claim to be a resident for purposes of that country’s income tax”, and “do not show the address of a financial institution, a post office box, or an address used solely for mailing purposes.” A form with a broker’s address or a mailbox in a treaty country is a form that invites a question.

Validity is time-limited: “a Form W-8BEN will remain in effect for purposes of establishing foreign status for a period starting on the date the form is signed and ending on the last day of the third succeeding calendar year, unless a change in circumstances makes any information on the form incorrect.” A form signed in September 2025 runs to 31 December 2028.

A change of circumstances restarts the obligation: “if you use Form W-8BEN to claim treaty benefits, a move to the United States or outside the country where you have been claiming treaty benefits is a change in circumstances. In that case, you must notify the withholding agent, payer, or FFI within 30 days of the move.”

The 183-day rule for gains

The publication that explains the gain side is Publication 519. Its answer to the common question is direct: “Capital gains are generally not taxable if you were in the United States for less than 183 days during the year.”

The exception is written just as plainly: “If you were in the United States for 183 days or more during the tax year, your net gain from sales or exchanges of capital assets is taxed at a 30% (or lower treaty) rate. For purposes of the 30% (or lower treaty) rate, net gain is the excess of your capital gains from U.S. sources over your capital losses from U.S. sources. This rule applies even if any of the transactions occurred while you were not in the United States.”

The word “presence” here is a day count under the tax rules, and the 183-day test in this provision is not the same as the substantial presence test that decides resident-alien status. A student on a visa, a remote trader who spends a summer in New York, and someone who never travels can all be in different positions despite holding the same portfolio.

There is a second condition, and it is the one practitioners watch: the gain must not be effectively connected with a US trade or business. Trading personal accounts is not usually a trade or business; running a dealing operation from a US office is.

Dividend equivalents: the rule that follows the structure

The withholding rule tracks the income, not the instrument. Publication 515 includes “dividend equivalents” in the income subject to withholding, which means a payment that is economically a dividend can be treated as one even when no share is held — the classic case being a swap or a contract for difference on a dividend-paying stock.

For an investor choosing between holding shares and holding synthetic exposure, that matters. The synthetic route may avoid stamp duty or simplify settlement, but it does not escape the dividend withholding if the payment is a dividend equivalent.

Where the crypto comparison breaks down

A crypto holder with no US-source income has no US withholding to worry about, and this is one of the reasons the two asset classes feel so different at tax time. But the comparison is often drawn too loosely.

The US does not tax a foreign person’s crypto gains merely because the asset trades on a US venue. It taxes US-source income, and it taxes a nonresident who is present in the US for 183 days or more on net capital gains. A token issued by a US entity that pays a distribution is a different question from a token bought on a US exchange, and a lending yield paid by a US platform may be FDAP rather than capital gain.

The lesson from the securities side transfers: the instrument determines the paperwork, and the paperwork determines the rate.

A practical sequence

1. File the W-8BEN before the first dividend, not after the first withholding. The refund is available but it costs a 1040-NR filing.
2. Use a permanent residence address, not a mailing address or the broker’s address.
3. Claim the treaty article that applies, and expect the broker to ask for the country and, where the treaty requires it, the article or paragraph.
4. Diarise the third calendar year after signature, because the form expires quietly.
5. Tell the broker within 30 days if you move to the United States or out of the treaty country.
6. Do not assume the sale is taxed the way the dividend was. For most nonresident investors the gain is outside US tax entirely, and no withholding should appear on the confirmation.

Risk note. The statutory rate, documentation requirement and dividend-equivalent rule in this article were read from IRS Publication 515; the capital-gains and 183-day rules from Publication 519; the form’s validity and address requirements from the Instructions for Form W-8BEN; and the 10 per cent rate from Article 9 of the US–China treaty, all on 2026-10-27. Tax treaties and rates change, and individual circumstances differ. This is not tax advice.