Find out how long it will take to reach a savings goal, or how much to save each month to reach it by a date you choose.
Use the interest rate your bank actually pays on the account. A high-yield savings account is usually a few percent, not the 7-8% typical of stock market investments.
The calculator has two modes. In the first, you enter a goal, what you have saved, and a monthly contribution, and it works out how many months it takes for your savings to grow to the goal. In the second, you enter a target time, and it works out the monthly amount you need to save to get there. Both use the same compound growth math, just solved for a different unknown.
Interest is added every month, and your contribution is added at the end of each month. Because the rate you enter is an APY (annual percentage yield), which already includes the effect of compounding, the calculator converts it to an equivalent monthly rate. A 4.5% APY works out to about 0.3675% per month. Treating the APY as a simple annual rate divided by 12 would slightly overstate your growth, so this tool avoids that shortcut.
If you would rather project growth over a fixed number of years instead of solving for a goal, our Investment Calculator is built for that case, typically with the higher return assumptions used for stock market investing rather than a bank savings account.
Starting with $2,000 saved, adding $300 a month, and earning 4.5% APY, it would take 54 months (4 years and 6 months) to reach a $20,000 goal. You would contribute $18,200 out of pocket (your $2,000 plus 54 payments of $300), and the remaining $2,121.08 would come from interest. The balance at that point is $20,321.08, slightly above the goal because the last full month carries you just past it.
For a goal like this one, the amount you save matters far more than the rate. Here is how long the same plan takes at different rates:
Going from 0% to 4.5% saves only 6 months, while a small increase in your monthly contribution does much more, as the next section shows. A good rate still helps, especially for larger balances, so it is worth comparing accounts, but it is not a substitute for saving regularly.
Using the same example, the calculator's "what if" field shows the effect of adding to your monthly contribution:
Your starting balance matters too. Beginning with $2,000 instead of nothing shortens the same plan from 60 months to 54.
Switch to the "How much per month?" mode to work backward from a deadline. To reach $20,000 from $2,000 at 4.5% APY, you need to save:
The longer the timeline, the more of the goal comes from interest rather than your own deposits. Over 5 years, interest supplies about $2,320 of the $20,000, compared with about $925 over 2 years.
For goals within the next few years, people commonly use high-yield savings accounts, money market accounts, or certificates of deposit, because the balance does not swing with the stock market. In the United States, deposits at insured banks are generally protected up to $250,000 per depositor, per bank, per ownership category. Rates on savings accounts are variable and can change, so treat the rate you enter as an estimate and check it now and then.
How is this different from your Investment Calculator?
This tool solves for time or for the monthly amount: you set a dollar goal and it tells you how long it will take, or how much to save each month. The Investment Calculator solves for a final balance: you set a number of years and it tells you what your balance would be. They use the same underlying math, just solved for a different unknown.
What interest rate should I use for a savings account?
Use the actual annual percentage yield (APY) your bank or credit union pays. Traditional savings accounts at large banks often pay well under 1%, while high-yield online savings accounts have historically paid several percent. Check your specific account's current rate rather than assuming.
What if I already have some money saved?
Enter that amount in the "current savings" field. The calculator includes it as your starting point and lets it grow alongside your monthly contributions, which typically gets you to your goal faster than starting from zero.
What if I can't reach my goal in a reasonable time?
Try increasing the monthly contribution, or use the "how much per month" mode to see what a longer deadline would require. Small increases in monthly savings can meaningfully shorten the time needed, especially early on.
Is this good for an emergency fund?
Yes. An emergency fund is one of the most common uses for a goal-based savings calculator like this one. Many financial guides suggest a goal of 3-6 months of essential expenses as a starting target.
Does this account for taxes on interest?
No. Interest earned in a regular (non-tax-advantaged) savings account is generally taxable income, so your actual after-tax growth will be somewhat lower than the raw interest shown here.
What if my monthly contribution changes over time?
This calculator assumes a constant monthly contribution for simplicity. If your ability to save varies significantly, treat the result as a rough estimate and recheck the calculator periodically with updated numbers.
Should I use a high-yield savings account?
For money you'll need within the next few years, like an emergency fund or a short-term goal, a high-yield savings account is generally considered safer than investing in stocks, since the balance doesn't fluctuate with the market. Compare current rates across banks, since they can vary and change over time.