Loyalty tax calculator
Your bank is counting on you not to check.
Big banks pay next to nothing on easy-access savings - and the best accounts pay about four times as much. Put your actual balance in below and see the gap, in pounds, not just percent.
Your savings
The amount sitting in your easy-access account right now.
Optional - anything you add on top each month.
This year alone, staying put costs you
Staying put costs you £329 this year alone. Over 5 years, switching would leave you £1,826 better off.
£100
£429
That gap isn’t a one-off. It resets every single year you don’t switch.
The cost of staying put
That’s what staying put costs you over 5 years - the same balance, the same monthly top-up, just sitting in a worse account.
“Same money. Same effort. £1,826 difference.”
| Year | If you switch (best easy-access) | If you stay put (big bank) |
|---|---|---|
| 0 | £10,000 | £10,000 |
| 1 | £10,429 | £10,100 |
| 2 | £10,877 | £10,202 |
| 3 | £11,344 | £10,304 |
| 4 | £11,831 | £10,408 |
| 5 | £12,338 | £10,512 |
How this works
The ‘Big bank’ preset uses 1% (Rates effective 11-12 March 2026, still current July 2026), roughly what the major high-street banks pay on a standard easy-access account. The ‘Best easy-access’ preset uses 4.21% (28 July 2026) - uncapped, with no introductory bonus to fall back on. Some best-buy tables quote rates as high as 5%, but those are usually capped at a low balance or drop after a fixed term, so the projection isn’t built on one. Both sides assume interest compounded monthly, with your top-up added at the end of each month. Real rates move and are not guaranteed - this is an illustration, not a promise. This is not financial advice. These are ideas to make you a little bit richer.
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