UK Premium Bonds: What British Nationals in the US Must Report to the IRS
Premium Bonds are a familiar savings product for many British families, but they do not keep their UK tax free treatment once the holder becomes a US taxpayer. The balance, the prizes, and the related reporting all need separate attention.
What Premium Bonds are
Premium Bonds are issued by National Savings and Investments, which means they are backed by the UK government rather than by a commercial bank. Instead of paying regular interest, they enter the holder into monthly prize draws, with prizes ranging from modest amounts to very large awards. In the United Kingdom, the prizes are not subject to income tax, which is one reason Premium Bonds remain popular for savers who want capital security and a tax efficient return. For a British national living in the United States, however, the key point is that the product is still a foreign financial account or investment relationship even though it does not look like a normal savings account statement every month.
How the IRS views prize winnings
The IRS does not treat Premium Bond prizes as tax free merely because the United Kingdom does. As a matter of US tax analysis, a cash prize received from a foreign savings product is generally treated as ordinary income unless a specific exclusion applies, and there is no broad exclusion for Premium Bond winnings. That means a prize that is ignored by HMRC can still create taxable income on a US return. The practical asymmetry is important because there may be no UK tax paid on the prize to credit against the US tax. A holder who wins frequently can therefore face a real US tax cost even though the UK product was marketed at home as tax free.
Reporting the balance on FBAR and Form 8938
Whether or not a prize is won, the holding itself can still trigger foreign account reporting. If the aggregate value of foreign financial accounts exceeds 10,000 dollars at any point during the year, Premium Bonds may need to be included on FBAR. Depending on the taxpayer filing status and total foreign asset value, the holding may also need to appear on Form 8938 under FATCA. This catches many people by surprise because they assume a small NS&I account with no income in a particular year can be ignored. US reporting rules do not work that way. The filing analysis turns largely on account value and account type, not on whether the account paid a predictable amount of interest.
Why UK tax free status does not help in the US
The UK tax free status of Premium Bond prizes has no automatic effect under US law. The United States generally taxes its citizens and residents on worldwide income unless a specific domestic exclusion or treaty rule says otherwise, and there is no treaty article that converts Premium Bond prizes into exempt income. This is a classic cross border mismatch: the UK says there is no taxable income, while the US may say the opposite. Because there is no UK tax charge on the prize, the foreign tax credit mechanism does not solve the problem. A British national can therefore end up with US tax due on income that attracted no UK tax at all.
The practical issue when there are no prizes
Many holders go through long periods with low or zero winnings, especially on smaller balances. That does not remove the reporting obligation if the account itself is reportable. A year with no prizes can still require FBAR or Form 8938 disclosure because the balance remained in place. From a practical standpoint, that means Premium Bonds should be included in a yearly foreign account review alongside bank accounts, ISAs, pensions, and brokerage accounts. The account may feel administratively simple in the United Kingdom, but for a US resident it becomes one more foreign asset that needs to be tracked carefully even when it appears inactive.