Savings
Compound Interest Calculator
Project how savings or investments grow over time with regular monthly contributions.
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Estimate only — not advice.
This tool provides a simplified, general estimate for educational purposes.
It is not financial, tax, or legal advice, and it is not affiliated with
the IRS, the Social Security Administration, or any lender. See our full
disclaimer for what this calculator does and doesn't account for.
What this estimate assumes
- Interest compounds monthly at a constant annual rate, and contributions are added at the end of each month.
- Real markets don't return the same rate every year — this shows a smooth projection, not a guarantee. It also doesn't account for taxes, fees, or inflation.
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