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Priority #1 Tool

Compound Interest Calculator

Estimate future value using principal, monthly contributions, annual return, compounding frequency, and time horizon. Built for fast scenario analysis with visible assumptions.

This calculator is for informational and educational purposes only. It does not constitute financial, investment, legal, or tax advice.

Future value
$0
Total contributions
$0
Total interest earned
$0

How it works

The calculator compounds the initial principal at the selected annual rate and adds monthly contributions over the chosen time horizon.

Base formula: FV = P ~ (1 + r / n)n~t

Contribution model: each monthly contribution is grown forward to the end of the period using the same annual return assumption.

Assumptions

Recommended next steps

After estimating long-term growth, compare investing platforms, brokers, and savings options.

Complete Compound Interest Guide