NS&I Premium Bonds Prize Odds vs UK Cash ISA Calculator
Model your realistic median tax-free prize winnings from NS&I Premium Bonds (up to the £50,000 maximum holding at 1 in 22,000 monthly bond odds) and compare against guaranteed compound interest in a UK Cash ISA.
| Premium Bonds Holding | Median Expected Annual Prizes | Guaranteed 4.8% Cash ISA Interest |
|---|---|---|
| £5,000 Holding | £175 / year (3.50% median rate) | £240 / year guaranteed |
| £10,000 Holding | £375 / year (3.75% median rate) | £480 / year guaranteed |
| £25,000 Holding | £975 / year (3.90% median rate) | £1,200 / year guaranteed |
| £50,000 Maximum Holding | £1,975 / year (3.95% median rate) | £2,400 / year guaranteed |