Guide
US dividend withholding tax for non-US investors: why 30%, treaty rates and W-8BEN
If you live outside the US and own US shares or US-listed ETFs, your dividends usually arrive with a chunk already taken off. This guide explains where that deduction comes from, how tax treaties reduce it, what Form W-8BEN does, and what it costs over a long holding period. Rates and rules are from IRS publications, listed at the end. How the dividend is taxed where you live is a separate question; check your local tax authority.
To estimate the withholding on your own portfolio, use the US dividend withholding tax calculator.
Why do non-US investors pay 30% on US dividends?
Under US law, a nonresident alien (a non-US person who isn’t a US tax resident) is taxed at 30% of the gross amount of US-source dividends, interest and similar investment income that isn’t connected with a US trade or business. The tax is collected by withholding: the US company, fund or broker deducts it before the money reaches you (IRS Publication 515; Instructions for Form W-8BEN).
Two things follow:
- It’s applied to the gross dividend, with no allowances or deductions.
- For an individual portfolio investor with no other US income, the amount withheld at the correct rate generally settles the US tax on that dividend. If too much was withheld, getting a refund means filing a US return, which is why it’s worth getting your paperwork right at the start.
Who gets a lower treaty rate?
If you are resident in a jurisdiction with a US income tax treaty and you qualify for its benefits, the dividend rate is usually lower. Some general (portfolio) dividend rates from IRS Tax Treaty Table 1 (Rev. May 2023):
| Place of residence | General dividend rate |
|---|---|
| Australia | 15% |
| Canada | 15% |
| Ireland | 15% |
| United Kingdom | 15% |
| Mainland China | 10% |
| Japan | 10% |
| India | 25% |
| Hong Kong | No US income tax treaty, so the statutory 30% applies |
| Singapore | No US income tax treaty, so the statutory 30% applies |
The Hong Kong and Singapore rows are based on the IRS’s A-to-Z list of US income tax treaties, which includes neither. The IRS warns that Table 1 doesn’t cover every eligibility condition: footnotes, “limitation on benefits” rules and the treaty text can all matter. Treat these figures as a starting point, not a final answer.
What does Form W-8BEN do?
Form W-8BEN is the IRS form an individual gives to a broker or payer (not to the IRS) to:
- Certify that you aren’t a US person. This is what lets the payer apply foreign-person withholding rather than treat you as a US person.
- Claim a treaty rate, if you are resident in a treaty partner and qualify (Part II of the form).
- Claim exemption from US information reporting and backup withholding on items such as broker sale proceeds.
If you live in a no-treaty jurisdiction such as Hong Kong, a W-8BEN won’t lower the 30% dividend rate. It’s still the standard way to establish your foreign status.
Expiry: the form generally stays valid from the date you sign it until the last day of the third calendar year after that, unless your circumstances change. A form signed on 30 September 2015 was valid through 31 December 2018. Brokers will usually ask you to renew it.
How much is withheld from a single dividend?
Tax withheld = gross US dividend × withholding rate (30%, or your treaty rate if you qualify).
For a US$10,000 dividend:
| Investor | Rate | Withheld | Received |
|---|---|---|---|
| Hong Kong resident (no treaty) | 30% | US$3,000 | US$7,000 |
| Qualifying UK resident (treaty) | 15% | US$1,500 | US$8,500 |
| Qualifying Japan resident (treaty) | 10% | US$1,000 | US$9,000 |
How much does withholding cost over 30 years?
Return lost each year = dividend yield × withholding rate. A 2% yield taxed at 30% costs 0.6 percentage points a year.
Withholding is charged every time a dividend is paid, so the cost compounds. Assume:
- US$100,000 invested in US shares
- A 2% dividend yield and 5% a year price growth (hypothetical assumptions, not a forecast)
- Dividends reinvested after withholding, for 30 years, with no other costs
| Withholding rate | Effective annual return | Value after 30 years |
|---|---|---|
| 0% (benchmark) | 7.0% | US$761,226 |
| 15% (treaty) | 6.7% | US$699,733 |
| 30% (no treaty) | 6.4% | US$643,056 |
At 30%, withholding cuts the effective return by 0.6 percentage points a year (2% × 30%). Over 30 years the no-treaty investor ends with about US$118,000 less than the benchmark, and about US$57,000 less than the treaty investor (checked in Python). The higher the yield, the bigger the gap. A growth-heavy portfolio with a low yield loses much less.
Why do some investors look at Ireland-domiciled funds?
A fund’s domicile (the jurisdiction where the fund itself is set up) changes where the withholding happens:
- When you own a US-domiciled ETF, its dividends to you are US-source dividends, so your own rate applies: 30% if you have no treaty.
- An Ireland-domiciled fund holding US shares receives the US dividends itself. Under the US–Ireland treaty, the general rate shown in IRS Table 1 is 15%, if the fund qualifies. What happens when the fund pays you, and any estate-tax considerations, depend on Irish rules, your residence and the fund’s documents.
This is an explanation of the mechanism, not a recommendation of any fund or structure. Fund costs, tracking difference and the tax rules where you live matter just as much.
Do non-US investors pay US tax on capital gains?
According to IRS Publication 519, if your capital gains aren’t connected with a US trade or business, they’re generally not taxable in the US if you were in the US for less than 183 days during the year. If you were there 183 days or more, net US-source gains are taxed at 30% (or a lower treaty rate). So for a typical overseas investor, dividends are taxed at source but gains from selling shares generally aren’t.
FAQ
Why is 30% taken from my US dividends?
The US taxes dividends from US sources paid to nonresident aliens at a flat 30% of the gross amount, collected by withholding at source, unless a tax treaty sets a lower rate.
Does Hong Kong have a tax treaty with the US?
No. Hong Kong is not on the IRS list of US income tax treaties, so Hong Kong residents generally face the statutory 30% rate on US dividends.
Do I still need a W-8BEN if there is no treaty where I live?
Generally yes. It certifies to your broker or payer that you are not a US person, which is what lets them apply foreign-person withholding. Without a treaty, it does not lower the dividend rate.
How long is a W-8BEN valid?
Generally from the date you sign it until the last day of the third calendar year after that, unless a change in your circumstances makes the information incorrect.
Sources (checked 3 October 2026)
- IRS, Publication 515, Withholding of Tax on Nonresident Aliens and Foreign Entities: https://www.irs.gov/publications/p515
- IRS, Publication 519, U.S. Tax Guide for Aliens: https://www.irs.gov/publications/p519
- IRS, Instructions for Form W-8BEN (Rev. 10/2021): https://www.irs.gov/instructions/iw8ben
- IRS, Tax Treaty Table 1 (Rev. May 2023): https://www.irs.gov/pub/irs-lbi/tax-treaty-table-1.pdf
- IRS, United States income tax treaties A to Z: https://www.irs.gov/businesses/international-businesses/united-states-income-tax-treaties-a-to-z
- IRS, NRA withholding: https://www.irs.gov/individuals/international-taxpayers/nra-withholding
Related: How compound interest works. Estimate your own withholding with the US dividend withholding tax calculator. To model long-run growth after withholding, use the compound interest calculator with your after-withholding return.
This article is general information, not tax, legal or investment advice, and it doesn’t recommend any security or fund. Treaty eligibility depends on your circumstances. See the disclaimer.