Tax on US tournament winnings: the 30% withholding explained

Win money at a US event and the payout often lands short: the organiser has applied the United States’ standard 30% withholding on income paid to non-residents. It feels like a penalty, but it is a default rate, and how much of it you can reduce or recover depends on what the payment is and what the UK-US tax treaty says.

Why 30% is taken

The US taxes US-source income paid to non-residents and asks the payer to withhold it before the money leaves the country. For prize and contest winnings the headline rate is 30%. Tournament organisers apply it because they are the ones on the hook to the IRS if they do not.

Can it be reduced or reclaimed?

Sometimes, and the route matters. Where the income is protected or reduced under the UK-US double tax treaty, it may be possible to lower the withholding at source or reclaim part of it afterwards. Doing so usually means having a US taxpayer identification number (an ITIN) and filing the right treaty paperwork. The treatment of esports prize money is not always clear-cut, which is exactly why a specialist who has done it before is worth the fee.

Foreign Tax Credit relief: the backstop

Even where US tax cannot be reduced, you are usually protected from paying tax twice. As a UK resident you declare the gross winnings on your UK return and claim Foreign Tax Credit relief for the US tax actually suffered, which is credited against your UK liability on the same income. The credit is generally limited to the UK tax on that income, so it relieves double taxation rather than refunding more than you owe here.

The mistakes that cost players

• Not declaring foreign winnings in the UK at all because "tax was already taken" — wrong, and a compliance risk.
• Declaring the income but never claiming credit for the US tax, and simply overpaying.
• Throwing away the organiser statement that proves how much was withheld.
• Assuming the 30% is always final — sometimes part of it is recoverable with the right claim.

It is not only the US

Korea, China and EU events each have their own withholding rules and their own treaty with the UK, so the rate deducted and the relief available differ by source. The principle is constant: declare it in the UK, credit the foreign tax, and keep the evidence. A firm that handles cross-border player income will know the route for the main esports jurisdictions.

Cite the IRS guidance on withholding for foreign persons and HMRC’s helpsheet on Foreign Tax Credit relief, and verify your specific position with a specialist, because the numbers turn on the facts of each payment.