Savings Goal Calculator
Four numbers decide how long a savings goal takes: the target, what you have already, how much you add each month, and what the account earns. Enter them below and the calculator works forward month by month until the balance reaches the goal.
For most ordinary goals the monthly contribution does nearly all the work and the interest is a modest bonus. That balance flips only over long horizons — which is the single most useful thing to understand about saving.
How long will this goal take?
Use the account APY for the return. The calculator compounds monthly and adds your contribution at the end of each month.
Contributions do the work; interest does it later
Over a short horizon, the return barely registers. Saving toward a $6,000 emergency fund over a year or two means the interest earned is small next to the money you put in — the contribution is the lever, and increasing it is the only fast way to move the date.
Over a long horizon the relationship inverts, because returns compound on a balance that includes previous returns while contributions stay flat. Somewhere between those two regimes the growth from the account overtakes the growth from your deposits, and where that point falls depends on the rate and the amount. The calculator shows the crossover implicitly: change only the return and see how little the date moves on a short goal, then try the same change on a long one.
This is why "start early" is advice about compounding rather than discipline — an early year is worth more than a late one at the same contribution.
Use the APY, not the advertised rate
Enter the annual percentage yield rather than a nominal interest rate. APY already accounts for compounding within the year, so it describes what the account actually returns; a nominal rate does not, and using it understates the result slightly.
This page quotes no rate on purpose. Savings rates move continuously, and a figure written into a static page would misinform readers within months — so take the current APY from the account you actually hold or are considering, and put that number in. Rates also differ enormously between account types, which is worth checking before assuming the return is fixed by circumstance.
| Where the money sits | What to enter |
|---|---|
| High-yield savings account | The current published APY |
| Ordinary bank savings | The APY, often far lower than a high-yield account |
| Certificate of deposit | The APY for the term you would commit to |
| Cash held in a checking account | Usually zero or close to it |
Set the target from the purpose, not a round number
A goal is easier to reach when the number means something. An emergency fund is usually described as some months of essential expenses, so the honest target comes from adding up rent, food, utilities, transport, insurance and minimum debt payments — not from picking a memorable figure. A house deposit follows from the price range and the loan you would need; a car fund from what you would actually buy.
Working the target out this way also tells you when you are done, which matters more than it sounds. Saving without a defined endpoint tends to either stall or continue past the point where the money would do more elsewhere — paying down high-rate debt, for instance, is a guaranteed return equal to the interest rate, which usually beats a savings account comfortably.
What the projection assumes, and where it breaks
The calculation is deliberately simple, which makes it reliable for planning and wrong for prediction. It assumes the contribution never changes, the return is steady, and nothing is withdrawn.
- Returns are not steady. A savings APY moves with rates; an invested balance moves far more, and a long goal held in investments can be well behind schedule at exactly the wrong moment.
- Contributions are not constant. Most people save more in some months than others, so treat the date as a midpoint rather than a deadline.
- Withdrawals reset progress. An emergency fund that gets used is doing its job, but the projection restarts from the new balance.
- Inflation erodes the target. A figure that covers a goal today may not in five years, which matters most for long-horizon goals like a deposit.
- Tax may apply to interest earned in an ordinary account, which reduces the effective return slightly below the APY.
Re-run the calculation whenever the contribution or the balance changes materially. It costs nothing and keeps the date honest.
Frequently asked questions
It depends on the target, your starting balance, the monthly amount you add and the account return — which is what the calculator computes, compounding monthly. On short goals the monthly contribution dominates; the return only becomes significant over long horizons.
APY. It already includes the effect of compounding within the year, so it describes what the account actually pays. A nominal rate slightly understates the result. Take the current figure from your own account, since rates change too often to publish here.
Work it out from your own essential monthly costs — rent, food, utilities, transport, insurance and minimum debt payments — and multiply by the number of months you want covered. A target derived that way is more useful than a round number, because it tells you when you are finished.
Paying down debt returns a guaranteed amount equal to its interest rate, which usually beats a savings account. The common compromise is a small starter emergency fund first, so an unexpected bill does not push you back onto credit, then debt, then the full fund.
No — it projects nominal amounts. For a goal several years out, the target itself may need to rise, so revisit both the target and the contribution periodically rather than treating the original figure as fixed.