What a balance and a monthly habit grow to, at the rate your own account pays
Estimates only, not financial advice. What you type stays on your device. Updated on 25 Oct 2026.A savings calculator projects a balance forward month by month. Enter what is in the account, what goes in each month and the APY your own bank pays, and it returns the balance, how much of it is interest, and the month interest first exceeds your deposit. 3 extras are optional: a goal, tax and inflation.
Type what is "In the account now" and what is "Paid in every month".
Under "The rate you have", pick "APY (the advertised figure)" and type the APY your account pays.
Set "For" in months, or pick one of the period chips beneath it.
Add "Your marginal tax rate" and "Inflation" under Optional if you want after-tax and real figures.
Read the balance after the period, "Interest earned" and the Year by year table.
Enter an opening balance, a monthly amount and the APY on your own account. The result is the balance at the end, split into what you paid in and what the bank paid you, with a row for every year.
No rate is published anywhere on this page. High-yield savings rates follow the central bank, change without notice and differ by bank and by balance tier, so any figure printed here would be wrong within weeks and wrong for your bank on the day you read it. The rate belongs to the offer in front of you.
APY and the interest rate are kept apart, because confusing them is the commonest error in this kind of calculator. An APY is the advertised figure and already includes compounding: 1,000 at 5% APY is 1,050 after a year, whatever the compounding frequency says. A nominal rate is the figure before compounding, and 5% compounded daily produces an APY of 5.13%. Choose which one you have and the other is worked out and shown, so two accounts quoting different things can be compared honestly.
Three things are optional. A goal turns the question round: instead of what will this be worth, how many months until it is enough. A marginal tax rate shows what is left after tax, since savings interest is ordinary income in the year it is credited. An inflation figure shows what the final balance buys in today's money, and says plainly when inflation is beating the rate, because an emergency fund losing slowly to inflation is still the right place for money you might need this week.
One number is worth more than the headline: the month at which interest first exceeds the monthly deposit. That is when the account starts doing more of the work than you do, and almost nobody calculates it by hand. Estimates only, not financial advice.
APY is the advertised figure and already includes compounding, so 1,000 at 5% APY is 1,050 after a year whatever the frequency. The interest rate is the figure before compounding: 5% compounded daily produces an APY of 5.13%. Compare two accounts on APY, never on the rate.
Rates follow the central bank, change without notice and differ by bank and balance tier. Any figure published here would be out of date within weeks and wrong for your own bank on the day you read it, so the rate you enter is the one from the offer in front of you.
Compare the two APYs here and look at the difference over five years. A percentage point on 20,000 is about 1,000 over that period, which is worth the afternoon it takes to open an account. Check the rate is not an introductory one that drops after six months.
Enter the target as a goal and the answer comes back as a number of months rather than a balance. Raising the monthly deposit moves that number immediately, which makes the choice between saving more and waiting longer a visible trade-off rather than a guess.
A little. Money paid in at the start of the month earns one extra month of interest compared with money paid in at the end, which over ten years at 4.4% is about 0.36% more. Choose whichever matches your standing order rather than guessing.
Yes, even when inflation is above the rate. An emergency fund is judged on being available the same day without a loss, not on returns. The calculator says when inflation is beating your rate so the cost is visible, but the alternative is worse when the money is needed suddenly.
Formula only: no rates or limits are read from an official source.
Still stuck? Ask about Savings Calculator and anybody who knows can answer. No account needed.
Same job, other tools: FD Calculator for Senior Citizens – Senior citizen FD interest, monthly or quarterly, with the extra rate added · FD Interest Calculator – Monthly or quarterly interest from a fixed deposit, and the total over the term · US Inflation Calculator – US inflation between any two years since 1913: price change, yearly rate and dollar value.
On the related tools: Step-up SIP Calculator – See how raising your SIP every year changes the final corpus.
In the collection Savings and Deposit Calculators.