UK Premium Bonds Calculator 2026 — NS&I Prize Estimator | Expected Returns
Free UK Premium Bonds calculator from National Savings & Investments. Calculate expected prize earnings, monthly draw odds, and investment returns on Premium Bond holdings.
Premium Bonds Investment
Investment Period
Premium Bonds Assumptions
Savings Account Comparison
✓ Last updated: March 2026 | Built with CRA-official rates, Bank of Canada data, and OSFI guidelines
How to Use This Calculator
Input total Premium Bonds investment held with NS&I
See probability of winning in upcoming draws
See average expected winning over time
Test different investment amounts and timeframes
Understanding Your Results
- Draw OddsEach £1 Premium Bond has 1 in 21,000 chance of winning any prize in each monthly draw
- Prize DistributionNS&I pays out approximately 50-55% of bond values as prizes; remainder goes unclaimed
- Expected ReturnStatistically, average expected return is around £1.50 per £100 invested annually
- Capital ProtectionYour capital remains protected; you can withdraw anytime without penalty
Key Tips
- ✓Monthly Draws Automatic: All bonds enter automatically every month; no action required on your part
- ✓Tax-Free Prize Wins: Any prizes won are completely tax-free under UK tax law
- ✓Compare to Savings Rates: Premium Bonds average ~1.5% return vs savings accounts at 3-5%; choose based on preference
- ✓No Penalty Withdrawal: Access your capital anytime without losing prize entry rights during holding period
Related Calculators
Understanding UK Premium Bonds
Monthly Prize Draws
NS&I holds 4 monthly electronic draws. All held bonds enter automatically. Prize draws use random selection; past holdings don't affect future odds.
Expected Returns
Historical data shows NS&I pays 50-55% of total Premium Bond value as prizes across all holders. Average return is approximately £1.50 per £100 invested annually.
Comparing to Other Savings
Premium Bonds suit risk-tolerant savers preferring chance of larger prize. Risk-averse savers may prefer guaranteed interest from savings accounts or ISAs at 3-5% rates.
Example Premium Bonds Calculation (UK 2026)
See expected return probability and average winnings over time.
- Premium Bonds Held
- £10,000
- Time Horizon
- 12 months
- Monthly Draws
- 4 draws per month
- Total Draw Entries
- 48 entries in next 12 months
- Probability of Any Win
- ≈95% chance of at least one win
- Expected Average Return
- £150 (1.5% per year)
- Capital Protected?
- Yes, fully protected
Frequently Asked Questions
Clear answers to common questions to help you use this calculator confidently.
What are UK Premium Bonds?
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What are UK Premium Bonds?
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Premium Bonds are savings certificates from National Savings & Investments (NS&I) where your money is entered into monthly draws for prizes instead of earning interest.
What are the odds of winning a Premium Bond prize?
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What are the odds of winning a Premium Bond prize?
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Each £1 bond has a 1 in 21,000 chance of winning any prize each draw. Odds are higher for smaller prizes (£25-£50) and lower for jackpots (£1 million+).
How are Premium Bonds drawn and how often?
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How are Premium Bonds drawn and how often?
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NS&I holds monthly electronic draws with 4 draws per month. All held bonds enter automatically; no selection required. Prize draws are independent and random.
Is the expected return from Premium Bonds good compared to savings accounts?
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Is the expected return from Premium Bonds good compared to savings accounts?
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Premium Bonds offer lottery-style returns. Expected payout is lower than savings account interest (~50% of bond value paid as prizes). Use for risk/reward preference, not guaranteed returns.
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