Premium Bonds are the UK’s most popular savings product, with over 24 million holders and £120 billion invested. Instead of earning interest, your money is entered into a monthly prize draw where you can win between £25 and £1 million — all completely tax-free. But are they actually a good place for your savings?
How Premium Bonds Work
- You buy bonds at £1 each (minimum purchase £25)
- Maximum holding: £50,000
- Each bond enters a monthly prize draw
- Prizes range from £25 to £1,000,000
- All prizes are tax-free
- Your capital is 100% safe — backed by HM Treasury via NS&I
The Prize Draw
Each month, ERNIE (Electronic Random Number Indicator Equipment) randomly selects winning bond numbers. The current prize structure:
| Prize | Number Awarded Monthly (approx.) | Odds Per £1 Bond |
|---|---|---|
| £1,000,000 | 2 | 1 in ~60 billion |
| £100,000 | 90 | 1 in ~1.3 billion |
| £50,000 | 180 | 1 in ~670 million |
| £25,000 | 360 | 1 in ~335 million |
| £10,000 | 900 | 1 in ~134 million |
| £5,000 | 1,800 | 1 in ~67 million |
| £1,000 | 17,500 | 1 in ~6.9 million |
| £500 | 17,500 | 1 in ~6.9 million |
| £100 | 1,289,200 | 1 in ~94,000 |
| £50 | 1,289,200 | 1 in ~94,000 |
| £25 | 2,880,250 | 1 in ~42,000 |
The overall odds of any individual £1 bond winning a prize in any month are approximately 1 in 21,000.
What You Can Realistically Expect
The prize fund rate (currently 4.00%) is the average return across all bondholders — but most people will not receive the average. Returns depend heavily on luck and holding size.
Expected Annual Return by Holding Size
| Holding | Expected Prizes/Year | Expected Value/Year | Effective Return |
|---|---|---|---|
| £1,000 | 0–1 | £0–£25 | 0–2.5% |
| £5,000 | 2–3 | £50–£75 | 1.0–1.5% |
| £10,000 | 5–6 | £125–£150 | 1.3–1.5% |
| £25,000 | 14–15 | £350–£375 | 1.4–1.5% |
| £50,000 | 28–30 | £725–£775 | 1.5% |
Key insight: With smaller holdings, your results in any given year can vary enormously from the average. You could win nothing or win several times. Only with large holdings does your return begin to stabilise.
These estimated effective returns are for typical holders winning only £25 prizes. Any larger prizes would significantly boost the return.
Premium Bonds vs Savings Accounts
| Factor | Premium Bonds | Best Easy Access Savings |
|---|---|---|
| Guaranteed return | No | Yes (at stated rate) |
| Tax treatment | Tax-free | Taxable above PSA |
| Potential for large gain | Yes (up to £1 million) | No |
| FSCS protection | N/A (government-backed) | £85,000 per institution |
| Best for | Large balances, higher taxpayers | Predictable returns, smaller sums |
| Access | Withdraw in 2–3 working days | Often instant |
When Premium Bonds Win
- You’re a higher rate taxpayer — the tax-free status is valuable because your PSA is only £500
- You’re an additional rate taxpayer — no PSA at all, so all savings interest is taxable
- You’ve maxed out your ISA — all returns are tax-free
- You hold a large amount (£30,000+) — returns approximate the prize fund rate more reliably
- You enjoy the prize draw — the entertainment factor is genuine for many people
When a Savings Account Wins
- You’re a basic rate taxpayer with savings under ~£20,000 — your PSA covers the interest
- You have a small holding — expected returns are well below savings account rates
- You need predictable income — savings accounts pay a known, regular amount
- You want to maximise returns — the best savings accounts consistently beat the median Premium Bond return
How to Buy, Hold, and Cash In
Buying
- Online at nsandi.com, by phone, or by post
- Minimum purchase: £25
- Maximum holding: £50,000 per person
- Can be gifted to children (parent or grandparent buys on their behalf)
Checking for Prizes
- Online at nsandi.com or the NS&I app
- You can set up email or text alerts
- Unclaimed prizes: over £80 million in prizes currently unclaimed — check regularly
Cashing In
- Request withdrawal online, by phone, or by post
- Money arrives in 2–3 working days for electronic withdrawals
- No penalty for withdrawing at any time
Premium Bonds for Children
Parents, grandparents, and great-grandparents can buy Premium Bonds for children under 16. The adult manages the bonds until the child turns 16:
- Same £50,000 maximum per child
- Tax-free prizes — beneficial since children’s savings are subject to the £100 parental gift rule
- The £100 rule does not apply to Premium Bond wins (they are prizes, not interest)
- No risk to capital — 100% safe
Premium Bonds can complement a Junior ISA as part of a child’s savings strategy.
Our Verdict
Premium Bonds are not the most efficient savings product for most people in most situations. However, they occupy a unique niche: tax-free, government-backed, liquid savings with a monthly chance of a life-changing prize. For higher-rate taxpayers with large savings who have already maxed ISA contributions, they make genuine financial sense. For everyone else, they are a fun complement to — but not a replacement for — a best-rate savings account or ISA.