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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.

✓ Last updated: March 2026 | Built with CRA-official rates, Bank of Canada data, and OSFI guidelines

How to Use This Calculator

Enter Bond Value

Input total Premium Bonds investment held with NS&I

View Monthly Odds

See probability of winning in upcoming draws

Calculate Expected Return

See average expected winning over time

Compare Strategies

Test different investment amounts and timeframes

Understanding Your Results

Draw Odds
Each £1 Premium Bond has 1 in 21,000 chance of winning any prize in each monthly draw
Prize Distribution
NS&I pays out approximately 50-55% of bond values as prizes; remainder goes unclaimed
Expected Return
Statistically, average expected return is around £1.50 per £100 invested annually
Capital Protection
Your 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

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Understanding UK Premium Bonds

How Premium Bonds Work

Premium Bonds are a lottery-style savings product from National Savings & Investments (NS&I). Instead of earning interest, your money enters monthly draws for prizes ranging from £25 to £1 million.

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.

Example Inputs
  • Premium Bonds Held£10,000
  • Time Horizon12 months
  • Monthly Draws4 draws per month
Example Results
  • Total Draw Entries48 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
Figures are indicative only. Actual repayments may vary by lender.
Help & FAQs

Frequently Asked Questions

Clear answers to common questions to help you use this calculator confidently.

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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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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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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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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