Compound Interest Calculator
Project your balance by deposit, rate, frequency, contributions, and years—then see interest earned vs. total contributions.
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Results
Future Value
$0
Total Contributions
$0
Interest Earned
$0
| Year | Start Balance | Contributions | Interest | End Balance |
|---|
Where guaranteed rates fit
Once you’ve seen the power of compounding, compare guaranteed MYGA rates or build a ladder to stage maturities for liquidity.
FAQs
What’s the formula for compound interest?
For a lump sum compounded \[n\] times per year at rate \[r\] for \[t\] years: \[FV = P \left(1 + \frac{r}{n}\right)^{nt}\]. With recurring contributions \[PMT\] made \[m\] times per year, future value adds \[PMT \cdot \frac{\left(1+\frac{r}{m}\right)^{mt}-1}{\frac{r}{m}}\] when contributions align with compounding. This tool aligns periods under the hood.
Why do monthly and annual compounding give different results?
More frequent compounding credits interest on interest sooner. The effective annual rate rises as frequency increases.
How do taxes affect my result?
Taxable accounts may owe tax on interest annually, reducing growth. Tax‑deferred annuities let earnings compound until withdrawal.