Savings Interest Calculator
See exactly how much you'll have at the end — for a monthly savings plan or a one-time deposit, before and after tax.
This tool runs entirely in your browser. Nothing you add is uploaded to any server.
Last checked: · Made by Fingertip Workshop
How to use
- 1
Choose Monthly savings or Lump-sum deposit.
- 2
Enter the amount, number of months and annual rate.
- 3
Pick simple or monthly compounding and an optional tax rate.
Why monthly savings earn less than you expect
Putting 500 a month into a 5% plan for a year earns about 162.50 — not 5% of 6,000. Money deposited in month one earns 12 months of interest, but the last deposit earns just one. On average only half your money is saved for the whole year.
That's why we also show the equivalent lump-sum yield, so you can compare savings plans and deposits fairly.
FAQ
Why does my bank show a slightly different figure?
Banks may use daily interest or different rounding.
How do I include bonus rates?
Enter the total rate (base + bonus) — and try the base rate too in case you miss the conditions.
Does it handle variable deposits?
No, it assumes the same amount every month.