Finance calculator
Investment Return Calculator
Project an investment balance with ongoing contributions.
Last reviewed
September 2026
September 2026
Enter your details
Results update privately in your browser.
How we calculate
A transparent estimate you can inspect.
Formula
Compound growth on your initial investment and monthly contributions.
Privacy
Your values are calculated locally and are not sent to a server by this calculator.
Use with care
Results are for informational purposes, not financial, tax, legal, lending, or investment advice.
Understanding your results
Return earned is projected value less the amount invested.
Assumptions and limitations
- Monthly contributions and an annual return assumption are compounded monthly.
Common questions
Before you decide
What assumptions does this use?
The inputs and assumptions are shown on this page; real outcomes can differ.
Does this use my financial data?
No. Inputs stay in your browser.