Savings Calculator

See how your savings grow over time with compound interest. Add monthly contributions to maximize your balance.

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Enter your savings details to calculate.

How it works

How savings growth is calculated.

  1. 01

    Initial deposit grows with compound interest

    Your starting balance earns interest each month: balance × (1 + monthly rate). After 10 years at 5% APR, $1,000 becomes $1,647.

  2. 02

    Monthly contributions compound too

    Each monthly deposit earns interest from the moment it's added. A $200/month contribution at 5% APR for 10 years totals $31,056 — not just $24,000 deposited.

  3. 03

    Total future value

    FV = P(1+r)^n + C × [(1+r)^n − 1] / r, where r = APR/12 (monthly rate), n = months, P = initial deposit, C = monthly contribution.

FAQ

Frequently asked questions.

How much do I have to save a month to save $10,000 in a year?

To save $10,000 in one year, you need to set aside approximately $833 per month. That figure assumes you are depositing into a standard account with little to no interest. If your savings account earns a competitive APY, the required monthly contribution will be slightly lower because your interest earnings contribute to the total.

How much do I need to save to have $100,000 in a year?

Saving $100,000 in a single year requires setting aside roughly $8,333 per month, which is a significant commitment for most households. A more realistic path for most people is to spread the goal over several years and let compound interest do part of the work. Using a savings calculator can help you find a monthly contribution amount that fits your budget and timeline.

How much will $10,000 be worth in 20 years?

With compound interest, $10,000 invested today can grow substantially over 20 years. At an average annual return of 5%, that amount grows to roughly $26,500; at 7% it reaches about $38,700. The exact future value depends on the interest rate, compounding frequency, and whether you make additional regular contributions during that period.

How does compound interest work in a savings account?

Compound interest means your account earns interest not just on the money you deposited, but also on the interest already credited to the account. Most savings accounts compound daily or monthly, which accelerates growth compared to simple interest. The more frequently interest is compounded and the higher the APY, the faster your balance grows over time.

What is APY and why does it matter for savings?

APY, or Annual Percentage Yield, is the real rate of return on a savings account after accounting for compounding over a full year. It is the most useful number to compare across different savings accounts because it captures the effect of compounding frequency. A higher APY means your money grows faster, so even a small difference in APY can have a meaningful impact over a multi-year savings horizon.

How do I use a savings calculator to reach a specific goal?

Enter your savings goal amount, your current balance, the account's APY, and your planned monthly deposit. The calculator will show you the projected balance at each point in time and tell you whether your current contribution rate is on track to meet your goal by the target date. You can adjust the monthly deposit or the timeline to find a combination that works for your budget.

Does adding regular monthly contributions make a big difference?

Yes, regular monthly contributions have a compounding effect that dramatically accelerates savings growth. Even modest additions, such as $100 to $200 per month, can more than double a long-term ending balance compared to a lump-sum deposit left untouched. A savings calculator lets you model different contribution amounts so you can see the concrete impact each option has on your final balance.

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Last updated: July 28, 2026