Premium Bonds Prize Calculator
This calculator helps you understand the expected winnings from buying premium bonds. Enter the amount of money to invest and the time period to hold the premium bonds for; the tool will tell you the odds of each possible outcome.
We'll calculate the median winnings, which is the amount that you'd expect to win with average luck. Note that your actual return could be higher or lower than this figure.
£10,000 for a year
Median Winnings
£0
This is what a person of average luck would expect to win.
Median Return Rate
0%
This is the effective annualized interest rate that average luck would give you.
Prize Range
£0 - £0
There's an 80% chance your winnings will be between these values.
Return Rate Range
0% - 0%
There's an 80% chance your annualized return rate will be between these values.
Probability Detail
| Probability | To Win At Least |
|---|---|
| 10 | £0 |
| 10 | £0 |
| 10 | £0 |
| 10 | £0 |
| 10 | £0 |
| 10 | £0 |
| 10 | £0 |
| 10 | £0 |
| 10 | £0 |
In a typical month
These are the odds for each prize amount in a typical month
About this calculator
Premium bonds work differently to any other savings account. Instead of paying a fixed interest rate they instead pay out prizes based on a predetermined 'prize rate'. Luck plays a role in determining how much you'll win in any given month - some months you'll get a higher return, some months less. Generally speaking, the more premium bonds you buy and the longer you hold them the closer you should expect to get to the advertised prize rate. This calculator exists to help give you an idea of the kind of returns you might expect if you invest a certain amount in premium bonds.
Note that the calculations on this page are based on the current NS&I prize rate and an approximation of the prize distribution that creates. When considering forecasts into the future remember that NS&I can change the prize rate at any time; usually around when interest rates are changed.
We are not in any way affiliated with NS&I or Premium Bonds. This calculator is an unofficial tool to help you make the most of your investments.