See what your savings could grow into — starting balance, deposits, and interest combined
💡 Why This Matters Watching a number on a bank statement doesn't tell you where it's headed — this shows you. Plug in what you've got saved and what you're setting aside each month, and see the real dollar impact of compound interest over time.
On a 10-year timeline at a decent interest rate, the interest earned can equal several months of your own deposits — money you never had to set aside yourself.
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This calculator projects two growth streams and adds them together. Your starting balance compounds monthly at your entered interest rate for the full time period. Each monthly deposit also compounds — but for fewer months, since later deposits have less time to grow than earlier ones. The total is your starting balance's growth plus the combined growth of every deposit along the way.
The projected balance is your best estimate of where you'll land if you keep depositing the same amount at the same rate. The breakdown separates what you actually contributed (starting balance plus all deposits) from what the interest itself added — that interest figure is the part compounding is doing for you, not money you had to save.
This assumes a fixed interest rate and consistent monthly deposits — real savings accounts have variable rates, and most people's contributions fluctuate month to month. Treat the result as a directional estimate, not a guarantee. It also doesn't account for taxes on interest earned, which can reduce your actual take-home growth depending on the account type.
Try adjusting the monthly deposit or interest rate to see how sensitive your outcome is to each — sometimes a small rate bump matters more than you'd expect, and sometimes an extra $25/month compounds into more than you'd think. If you have a specific dollar target and date in mind rather than an open-ended projection, our Savings Goal Calculator will tell you the timeline instead.
Example: Say you start with $2,000 saved, deposit $150 every month, and earn 4.5% annual interest for 10 years. Your starting balance and each deposit compound monthly — add it all up and you'd have $25,813.70. Of that, $20,000 came from your own deposits and $5,813.70 came from interest alone.
Your starting balance compounds on its own, and each monthly deposit compounds for the months remaining after it's added. The calculator adds both pieces together — the growth on your initial balance plus the growth on every future deposit — to get your final total.
This calculator answers "what will I have?" — it projects growth from what you're already saving. A savings goal calculator instead answers "how long until I hit a specific number?" if you already have a fixed target in mind.
Yes, especially over longer timeframes — compounding means even a 1-2 percentage point difference in rate can add up to thousands of dollars over a decade. Use the actual APY from your savings account or a realistic estimate, not a rounded guess.
You can run this calculator for any savings pool — emergency fund, house down payment, or general savings — just plug in the amount and contribution schedule relevant to that specific pool. Running separate calculations for separate goals usually gives clearer numbers than combining them.