Planning a savings goal

What this tool does

The Savings Goal Calculator works backwards from a target. You enter the amount you want, what you've saved so far, an interest rate, and a deadline; it returns the equal monthly deposit that gets you there — plus the total you'll contribute, the interest earned, and a year-by-year plan. It all runs in your browser.

How the monthly amount is found

First the calculator grows your existing savings to the deadline: current × (1 + i)n, where i is the monthly rate and n is the number of months. It subtracts that from your goal to get the shortfall, then divides by the annuity factor ((1 + i)n − 1) / i — the future value of saving $1 a month. The result is the deposit you need each month.

How to use it

1. Open the Savings Goal Calculator.
2. Enter your goal amount and how much you've already saved.
3. Add an interest rate (use zero for a plain piggy-bank plan).
4. Set the deadline in years and months.
5. Read the monthly amount — adjust the deadline or starting balance to make it fit your budget.

Let interest do some of the work

Even a modest rate reduces what you have to put in yourself, because each deposit and your starting balance keep earning until the deadline. Pushing the deadline out further has the biggest effect on a tight monthly number.

Your numbers stay private

All calculations happen locally in your browser — nothing you enter is uploaded.

FAQ

How is the required monthly saving calculated?

By dividing the goal shortfall (after growing current savings) by the future-value-of-an-annuity factor.

What if I have no interest rate?

Set the rate to zero — the monthly amount becomes the remaining goal divided by the number of months.

Is my data uploaded?

No — it all runs in your browser.

This tool gives estimates for general use and is not financial advice.

Ready to try it? Open the Savings Goal Calculator →