Premium Bonds' 3.80% Prize Rate Is a Lie. Your Savings Account at 5.01% Beats It Every Single Year.

The prize fund rate is the total value of prizes paid out in a year divided by the total value of Bonds held. NS&I takes that 3.80% pool and carves it up. The problem is how they carve it.

Each £1 Bond has odds of 22,000 to 1 of winning a prize in any given monthly draw. But the prize distribution is wildly skewed. The July 2026 draw will allocate most of the prize pool to a tiny number of large prizes — the two £1 million jackpots, a handful of £100,000 and £50,000 prizes — with the vast majority of winners receiving £25 or £50.

This creates a distribution where the mean return (what the 3.80% represents) is pulled up by prizes almost nobody wins, while the median return — what a typical holder with average luck actually gets — is substantially lower. Martin Lewis at MoneySavingExpert has documented this for years: with average luck on a £10,000 holding, you might see closer to 2.5-3.0% in actual prizes.

If you hold £1,000 in Premium Bonds, your most likely outcome is winning nothing at all in a given year — or perhaps a single £25 prize. That's a 2.5% return if you're lucky. The same £1,000 in Cahoot's 5% savings account produces exactly £50. Guaranteed.

NS&I raised the prize fund rate from 3.30% to 3.80% effective from the July 2026 draw, as part of a wider rate hike across nine savings products announced on 23 June 2026. The increase is designed to attract deposits to meet NS&I's £15 billion net financing target for the 2026/27 financial year — a target set by the Treasury that gives NS&I an explicit incentive to offer competitive rates when it needs cash. The fact that even at 3.80%, Premium Bonds still trail the best savings accounts by over 1.2 percentage points tells you how much the lottery structure costs you in expected return.

Let's put this in pounds. The best easy-access savings account tracked by MoneySavingExpert as of 26 June 2026 pays 5.01% (Oxbury Bank, six-month introductory bonus, up to £120,000). Even the simplest no-catch account — Ulster Bank at 4.30% — comfortably beats the Premium Bonds headline rate, and destroys the median return.

Here is what happens to £10,000 over 5 years:

• Oxbury Bank at 5.01%: £12,768 — you earn £2,768 in guaranteed interest
• Ulster Bank at 4.30%: £12,347 — you earn £2,347 in guaranteed interest
• Premium Bonds (median luck at ~2.8%): roughly £11,480 — you earn about £1,480, but only if your luck holds
• Premium Bonds (bad luck): £10,000 — you earn nothing for years on end

The gap is not small. Over a decade, it runs into thousands of pounds. And remember — the savings account interest is guaranteed by the FSCS up to £120,000 per banking licence. Your Premium Bonds are also government-backed via NS&I, but you're paying for that guarantee with a substantially lower expected return.

Check our savings hub for the latest best-buy rates updated daily. For the opposing argument that Premium Bonds make sense for higher-rate taxpayers, read our companion debate article.

The standard defence of Premium Bonds is that prizes are tax-free. This matters — but only for a narrow slice of savers. Let's be precise.

For the 2026/27 tax year, basic-rate taxpayers get a Personal Savings Allowance of £1,000. Higher-rate taxpayers get £500. Additional-rate taxpayers get nothing.

A basic-rate taxpayer with £20,000 in a 5.01% savings account earns £1,002 in interest — £2 over the allowance. They pay 20p in tax. The tax argument for Premium Bonds is worth 20 pence. For a higher-rate taxpayer with the same holding, the tax bill is £251 on £502 of taxable interest. At that point, the tax-free status starts to matter — but even then, a cash ISA at 4.51% (Trading 212) solves the problem while beating Premium Bonds' median return.

The Premium Bonds tax advantage only becomes decisive for additional-rate taxpayers who have exhausted their £20,000 ISA allowance and still have significant cash to deploy. That is a real use case. It is not the use case for 23.9 million of the 24 million Premium Bonds holders.

For almost everyone else, the Personal Savings Allowance and the ISA wrapper make the tax argument a red herring. You're choosing a lottery ticket over guaranteed interest for a tax benefit you almost certainly don't need.

For a deeper dive into how tax bands interact with your savings strategy, explore our tax planning hub. The complete NS&I Premium Bonds guide breaks down every feature of the product in detail.

NS&I's marketing department would like you to focus on the two £1 million jackpots each month. They are not lying — someone does win. But the odds are not on your side.

With 22,000-to-1 odds per £1 Bond per draw, and approximately 126 billion £1 Bonds in circulation, the probability of any single Bond winning the jackpot is vanishingly small. Your £50,000 holding — the maximum allowed — gives you 50,000 entries per month. The odds of winning the £1 million prize in any given year: about 0.005%. You are more likely to die in a car crash (0.01% annually, per ONS data) than to win the Premium Bonds jackpot.

This is not an investment product. It's a lottery ticket wrapped in the language of saving. And like all lotteries, the house — NS&I, and by extension the Treasury — takes a substantial cut. The difference between what NS&I collects in funding and what it pays out is the "lottery tax" you're paying for the dream.

The Bank of England base rate sits at 3.75%. NS&I can borrow from you at an effective cost well below that — because the prize distribution means the actual payout is lower than the headline rate — and then lend to the government. You are subsidising government borrowing. There is no reason to accept this deal when banks, competing for your deposits in an impressively competitive market, are offering 5.01%. For a broader look at how NS&I products fit into your savings strategy, see our complete NS&I Premium Bonds guide.

With the Bank of England base rate at 3.75% and inflation at 2.8%, the real return on Premium Bonds — once you account for the prize distribution skew — is close to zero. The lottery thrill is the only thing keeping the product alive for most holders.

This article isn't saying Premium Bonds are always wrong. They make sense in exactly three scenarios:

1. You are an additional-rate taxpayer with maxed-out ISAs. If you pay 45% tax on savings interest, have used your full £20,000 ISA allowance, and have significant cash to hold, the tax-free status of Premium Bonds becomes genuinely valuable. A 3.80% prize rate tax-free is equivalent to a 6.91% taxable rate for an additional-rate taxpayer. No savings account pays that.

2. You value the lottery thrill itself. Some people genuinely enjoy the monthly "did I win?" check. If that entertainment value is worth £100-200 a year to you in foregone interest, knock yourself out. Just don't pretend it's a sensible financial decision — it's a consumption decision, like a Netflix subscription.

3. You need 100% government-guaranteed protection above the £120,000 FSCS limit. NS&I is backed by HM Treasury, not just the FSCS. For amounts above £120,000 held with a single banking licence, NS&I offers safety no commercial bank can match.

For everyone else — the vast majority of the 24 million holders — Premium Bonds are costing you real money. The NS&I website is clear that the product is not for you if you want "guaranteed returns." Listen to them.

This article is for informational purposes only and does not constitute financial advice. You should seek independent financial advice before making any investment decisions.