Need context? Read our retirement planning guide for assumptions and strategy.
Read the guide401(k) contribution guide
This calculator estimates how your contributions and employer match could grow over time. Use it to test different savings rates and return assumptions.
Employer match
Matching contributions can be a major boost. Model the match percent and limit described in your plan documents.
Contribution rate
Increasing your contribution rate, even by a small amount, can compound into a large difference over time.
Salary growth
Raises change future contributions. Use a conservative estimate and update as your income changes.
How matching is modeled
- Your contribution is calculated as a percentage of salary.
- The employer match applies only up to the match limit you enter.
- Growth compounds annually based on the expected return.
Adjust inputs for realism
- Use an expected return that matches your asset mix and fee levels.
- Check your plan's vesting schedule if employer match is not immediate.
- Review contribution limits annually since they change over time.
Common planning moves
- Contribute enough to capture the full employer match.
- Increase contributions after raises to avoid lifestyle creep.
- Keep investment costs low and rebalance periodically.
401(k) calculator FAQ
How is employer match calculated?
The calculator applies your employer match percentage to your contributions up to the match limit you enter. Contributions above that limit are not matched.
Does this calculator include taxes?
No. It focuses on account growth. Taxes on withdrawals depend on whether your contributions are Roth or traditional.
What if I change jobs?
The projection assumes continuous contributions and the same match policy. Job changes can affect contributions, match, and plan fees.
Should I choose Roth or traditional 401(k)?
It depends on your current tax rate versus your expected retirement tax rate. Many savers use a mix to diversify tax exposure.