Yes, NS&I Premium Bonds are tax-free in the UK: every prize, from the £25 minimum to the £1 million jackpot, is free of Income Tax and Capital Gains Tax. That is the headline, and it holds no matter how often you win. The complications sit around the edges: inheritance tax still applies to the bonds themselves, interest earned on reinvested winnings is taxable like any other savings income, and bondholders living abroad may owe tax to their own tax authority.
Why the Prizes Escape Income Tax
Premium Bond payouts are structured as winnings from a monthly prize draw, not as interest on savings. UK tax law does not treat lottery-type prizes the way it treats bank interest or investment income, so a Premium Bond prize is not classified as savings income, investment income, or any other category that would trigger an Income Tax charge. NS&I and HMRC confirm the treatment directly.1NS&I. Paying Tax on Your Savings
In practice, that means no deductions, no withholding, and no tax code adjustments. You receive the full face value of every prize. For higher-rate and additional-rate taxpayers, the exemption is worth more, because interest from an ordinary savings account might otherwise be taxed at 40% or 45%.
No Effect on Your Personal Savings Allowance
The Personal Savings Allowance covers £1,000 of savings interest for basic-rate taxpayers, £500 for higher-rate taxpayers, and nothing for additional-rate taxpayers.2GOV.UK. Tax on Savings Interest Premium Bond prizes sit entirely outside this system. They are not interest, so they do not count toward the allowance and do not use any of it up. You could win several thousand pounds in a single month and still have your full allowance available for interest earned on other accounts.
That is useful if your existing savings already push you close to the allowance limit. Shifting some of that cash into Premium Bonds frees up allowance headroom for the interest on what remains.
You Do Not Need to Tell HMRC
Because prizes carry no tax liability, there is nothing to declare on a Self Assessment return. This applies regardless of how large or how frequent the wins are. If you file Self Assessment for other reasons, such as self-employment, rental income, or capital gains, you can leave Premium Bond winnings off the return entirely.1NS&I. Paying Tax on Your Savings
Reinvested Winnings Are a Different Story
The tax shelter ends the moment prize money leaves your Premium Bond holding and lands in a taxable account. Put winnings into an ordinary savings account and the interest they generate becomes taxable savings income under the usual rules. A £1 million jackpot sitting in a cash account paying 4% would produce £40,000 of interest in a year, comfortably beyond any Personal Savings Allowance, and taxed accordingly.
This is where winners most often trip up. The prize itself stays untaxed forever. Money you put to work in other products is treated no differently from wages paid into the same account. Keeping a note of prize amounts and dates helps you separate tax-free capital from taxable returns when it is time to file.
Inheritance Tax Still Applies
The Income Tax exemption does not extend to inheritance tax. When a bondholder dies, the face value of their Premium Bonds forms part of their estate. Inheritance Tax is charged at 40% on the portion of an estate that exceeds the nil-rate band,3Legislation.gov.uk. Inheritance Tax Act 1984 which is frozen at £325,000 and will remain there until at least 2030.4GOV.UK. Inheritance Tax Thresholds
Valuation is straightforward: the bonds are counted at their purchase price, not at any speculative estimate of future winnings. Someone holding the £50,000 maximum has that full amount added to property, pensions, and other assets when executors work out the estate’s total value. The residence nil-rate band, an additional allowance of up to £175,000 when a home passes to direct descendants, can raise the overall threshold but does not change how the bonds themselves are valued.
What Happens to the Bonds After Death
Premium Bonds stay in the monthly prize draw for up to 12 months after the holder’s death. Prizes won during that window are paid to the estate and remain free of Income Tax, though they do add to the estate’s total value for Inheritance Tax purposes.5NS&I. What to Do if an NS&I Customer Has Died NS&I pays these post-death prizes by warrant, similar to a cheque, to the person entitled under the will or the intestacy rules. They cannot be paid electronically or held back and consolidated at the end of the 12 months.
Once that period expires, the bonds must be cashed in. They cannot be transferred to a beneficiary as active Premium Bonds. Executors who let the deadline slip risk missing eligible draws while estate administration drags on.
If You Live in the United States
The UK’s tax-free treatment does not bind other countries. US residents who hold Premium Bonds face a very different picture, because the IRS treats gambling and lottery-type winnings, including those from foreign lotteries and raffles, as taxable income.6Internal Revenue Service. Topic No. 419, Gambling Income and Losses Premium Bond prizes are reported on Schedule 1 of Form 1040 and taxed at your ordinary income rate.
Reporting obligations go further. If the aggregate value of your foreign financial accounts, Premium Bonds included, exceeds $10,000 at any point in the calendar year, you must file a Report of Foreign Bank and Financial Accounts (FBAR) on FinCEN Form 114.7FinCEN. Report Foreign Bank and Financial Accounts Under FATCA, US residents must also file Form 8938 once foreign financial assets exceed $50,000 at year-end or $75,000 at any point in the year for single filers, with higher thresholds for joint filers and those living abroad. Holding the £50,000 Premium Bond maximum alone can push you across the FATCA threshold depending on the exchange rate, and missing either filing can attract penalties even when no tax is owed.
On the estate side, US citizens and residents must include worldwide assets in their gross estate, so Premium Bonds count toward the US federal estate tax calculation. The federal estate tax exemption for 2026 is $15,000,000, so most holders will not face a US bill.8Internal Revenue Service. Estate Tax Where dual UK-US exposure arises on the same bonds, the US-UK estate tax treaty generally provides credits to prevent full double taxation.
Premium Bonds vs ISAs on Tax
Both Premium Bonds and ISAs deliver tax-free returns, but the shape of the return is different. A Cash ISA pays a guaranteed rate of interest, so you know what you will earn. Premium Bonds guarantee nothing. The annual prize fund rate, currently 3.30% and rising to 3.80% from the July 2026 draw,9NS&I. Current Interest Rates for Our Accounts describes the total pool paid out as prizes, not a return any individual holder can rely on. With odds of 22,000 to 1 per £1 bond from July 2026, someone holding a modest amount might go months without a single prize.
Which one wins on tax depends on your bracket. Basic-rate taxpayers already get £1,000 of savings interest tax-free through the Personal Savings Allowance,2GOV.UK. Tax on Savings Interest so a Cash ISA paying a competitive rate can outperform Premium Bonds on a predictable basis. Additional-rate taxpayers, who get no Personal Savings Allowance, benefit most from Premium Bonds, because every pound of prize money escapes the 45% rate. The clearest case for Premium Bonds is a saver who has already used the ISA allowance and the Personal Savings Allowance and is looking for a tax-free home for surplus cash that is backed by the Treasury.