Free finance tool

Compound interest calculator

See how much your money can grow with compound interest. Enter your starting amount, monthly contribution, rate of return, and timeline.

$5,000
$500
7%
10 years
Total balance
$96,591
Total contributed
$65,000
Interest earned
$31,591
Year-by-year growth
Year 1$11,558
Year 2$18,590
Year 3$26,130
Year 4$34,215
Year 5$42,885
Year 6$52,181
Year 7$62,149
Year 8$72,839
Year 9$84,300
Year 10$96,591

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How it works

What is compound interest?

Compound interest is the interest you earn on your original money and on the interest you already earned. Over time, this snowball effect can turn small, consistent contributions into significant wealth.

Start with any amount

You don't need a large lump sum. Even a small initial deposit plus regular monthly contributions can grow meaningfully over time.

Rate of return matters

A higher annual return accelerates growth, but consistency matters more than chasing the highest rate. A realistic long-term average is often 6–8%.

Time is your advantage

The longer your money stays invested, the more time interest has to compound. Starting early often beats investing more later.

Track it in Zavro

Use Zavro to track your actual savings, net worth, and financial goals alongside projections like these.