Inputs and assumptions this product uses
- • Keep expected-return examples conservative and clearly hypothetical
- • Uses locked formula tests before publishing computed outputs
- • Avoid personalized investment recommendations
Savings and investing · calculator · live
Compound Interest Calculator
Model future value with starting balance, recurring contributions, compounding frequency, time horizon, and inflation assumptions.
Built for people comparing savings and investing scenarios.
Planning information only. Not investment advice, a performance projection, or a guarantee of returns.
What this will help you decide
Live v1 uses explicit user-entered return, contribution, compounding, and inflation assumptions.
Contribution cadence, compounding frequency, and rate variance should be visible inputs.
Nominal and inflation-adjusted outputs should be labeled separately.
What will not be included
- • Planning information only. Not investment advice, a performance projection, or a guarantee of returns.
- • The browser does not run calculator math or own financial assumptions.
- • No partner or commercial routing can change the product output.
Savings calculator
Run a compound-growth scenario
Model future value from starting balance, monthly contributions, a hypothetical rate, and inflation assumption.
Sources and effective dates
References are part of the product surface.
Investor.gov compound interest calculator
Reference for user-facing inputs such as initial investment, monthly contribution, time, rate, and compound frequency.
Retrieved 2026-05-24
Investor.gov compound interest explanation
Plain-language education on interest earning interest and the Rule of 72.
Retrieved 2026-05-24
Launch status
This product is available now.
Live calculator backed by the PolicyWorkspace planning-tool API with Investor.gov source references. Live tools return source records, assumptions, warnings, effective dates, and generated timestamps from the backend planning-tool API.