Core calculator

Compound Interest Calculator

Project investment growth from an initial balance, monthly contributions, return rate, and time.

Common questions

About this calculator

What return should I use?

Use a conservative estimate for planning. Many people test several return assumptions to understand downside and upside cases.

Does this include taxes or fees?

No. Reduce the expected return if you want to approximate taxes, platform fees, or fund expenses.

The expected annual return is converted to a monthly rate.

Monthly contributions are treated as end-of-month contributions.

Actual investments can be volatile, so this is a planning projection rather than a guarantee.

Educational planning estimate. It does not replace an official calculation or individualized financial, tax, or legal advice.

Measure how much of your income goes toward savings, investing, and debt principal.

Estimate your financial independence target and timeline using expenses, savings, returns, and withdrawal rate.

Add assets and liabilities to estimate your current net worth in one clean number.