PremiumBonds.io

How lucky have your Premium Bonds been? PremiumBonds.io turns your balance and prize history into a simple luck score, showing how your winnings compare with the expected average.

Enter your figures or import a spreadsheet to explore your results, understand how unusual they are and create a shareable image of your score.

• Measure your luck: Compare actual and expected winnings using published NS&I draw data.
• Track your results: Record monthly balances and prizes, save locally and download backups.
• Understand the odds: Explore estimated winning probabilities and typical outcomes.
• Explore the draws: Browse prize breakdowns, historical results and winning-number statistics.
• Share selectively: Share your score while keeping your balance private. Prize amounts are optional.

Free to use, with no account required. Your financial figures stay in your browser.

PremiumBonds.io is independent of NS&I. Past results do not change your chances in future draws.