Savings Goal Calculator

Set the amount you need and when you need it — get the monthly figure, the date you'll hit it, and how much of the work the interest is doing.

The two questions worth asking

A savings goal only has two useful forms. Either you know the deadline and need the monthly figure, or you know what you can spare and want the date. The tabs above switch between them; everything else stays the same.

Both run on the same arithmetic: your starting balance grows at the return rate, and each monthly deposit grows for however many months remain after it lands. Deposits are treated as arriving at the end of each month, which is the conservative assumption — paying at the start of the month gets there slightly sooner.

Why the return matters less than people expect

Over short horizons, almost all of the balance is money you put in. On a three-year goal at a sensible rate, growth typically contributes a few percent of the total — the comparison panel above shows exactly how much it is doing on your numbers.

Over long horizons the picture flips, and growth can eventually exceed contributions entirely. The crossover point sits somewhere around the fifteen-to-twenty-year mark at moderate rates. For a house deposit you are the engine; for a thirty-year goal, compounding is.

Choosing a return rate honestly

Use 0 for cash you cannot risk. Money needed within a year or two belongs somewhere safe, and modelling it at 0 keeps the plan honest.
Savings accounts change. A rate advertised today may not hold for the length of your goal.
Investment returns are averages, not schedules. A long-run figure of 6% or 7% does not arrive as 6% every year. A goal with a hard deadline should not depend on markets cooperating in the final year.
Inflation is not modelled here. The figure you get is in today's money; a goal ten years out will need more nominal cash than the same goal today.

If the monthly number looks impossible

Three levers exist, and only three: save more per month, allow more time, or need less. Raising the return rate is not a fourth — it is the one you control least. If the required deposit is out of reach, extend the deadline first and watch how quickly the monthly figure falls.

Frequently asked questions

How much do I need to save each month to reach my goal?

Enter the target, anything you have already saved, the deadline and an expected return. The calculator solves the standard future-value formula for the deposit, accounting for monthly compounding on both your starting balance and each deposit made along the way.

How long will it take to save a set amount?

Switch to "How long will it take?" and enter what you can save monthly. The calculator solves for the number of months, then rounds up to a whole deposit — you cannot reach a target with three quarters of a payment.

Does the calculator include compound interest?

Yes, compounded monthly. Your starting balance compounds for the whole period, and each deposit compounds for the months remaining after it lands. The results panel separates what you contributed from what the growth added.

What return rate should I use?

For money you cannot risk, use 0 or your account's current rate. For long-term investments a moderate long-run average is common, but treat it as an average rather than a schedule. Try a lower rate too and see whether the plan still works if the return disappoints.

Does this account for inflation?

No. The result is in today's money. For a goal several years out, the thing you are buying will likely cost more by then, so either raise the target to reflect that or treat the figure as a floor rather than a precise answer.

How ListCalc calculates · Report an error

1.Your Goal

2.The Plan

🧮 Calculation Details

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