CalculatorCountry FinanceUnited States
US 401(k) Savings Calculator
Project 401(k) growth from current balance, annual contributions and an assumed return.
Instant · no account
Input
Enter your values
Method
How it works
Change any input above and the result updates instantly. The formula or method used by this tool is shown below.
Future value = current balance growth + annual contribution annuity growth
Note
This is a growth illustration, not investment or tax advice. Contribution limits and plan rules can change.
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Quick answers
About this tool
What does the US 401(k) Savings Calculator do?+
Project 401(k) growth from current balance, annual contributions and an assumed return.
How does this calculator calculate the result?+
It uses this method: Future value = current balance growth + annual contribution annuity growth
Should I verify rates or rules before using the result?+
Yes. Rule-sensitive tools can change over time. CalcForge links to the official reference used for this tool and notes that it was checked 2026.