A familiar situation
If you are deciding whether to raise a workplace-plan contribution, compare the projection at two monthly deposit amounts. Include any employer contribution in the input and check the plan’s limits separately.
How to use this calculator
- Enter current retirement savings, monthly contribution, assumed annual return and the remaining inputs.
- Select Calculate to see the answer and its breakdown.
- Keep a scenario, change an input and compare the results.
Use consistent units and check the assumptions below before applying the result.
How 401k is calculated
This balance projection assumes monthly deposits and a constant return. It does not estimate tax eligibility, plan limits, inflation or the timing of withdrawals. Formula: Projected balance compounds current savings and each monthly deposit at the assumed rate. Use the displayed details to inspect the intermediate amounts and replace example assumptions with terms from your own quote or records.
Projected balance compounds current savings and each monthly deposit at the assumed rate.A $25,000 balance plus $600 per month for 25 years at 6% grows to around $480,000.
Assumptions & useful context
Constant monthly compounding is illustrative; returns vary and the estimate is before taxes, fees and inflation.
Financial projections use your assumptions. Actual returns, lender terms, fees and tax rules can differ; these results do not guarantee a future outcome.
Frequently asked questions
401K Calculator: what does the result include?
No. Limits and eligibility depend on the plan, tax year and personal circumstances. Enter a contribution that matches the scenario you want to examine.
401K Calculator: which assumptions matter most?
No. It is a nominal future balance and does not estimate taxes at withdrawal or the purchasing power of that balance.