Free 401k Calculator Spreadsheet Template
Estimate 401k growth with employee contributions, employer matching, and annual limits. See projected account value at retirement age.
What's Included
- Dashboard with 401k projection summary showing estimated balance at retirement age and total contributions
- 401k setup with salary, contribution percentage, employer match rate, and annual contribution limit inputs
- Year-by-year projection table displaying employee contribution, employer match, growth, and running total
- Employer match calculations that apply match percentage up to the specified cap on eligible compensation
- Contribution limit tracking that flags when annual employee deferrals reach the IRS maximum for the year
- Works in Microsoft Excel, Google Sheets, and LibreOffice Calc with no setup required
Preview
See what's inside this template
How to Use This 401k Calculator Template
Enter salary and contribution
Input your annual salary and the percentage you contribute to your 401k on the setup sheet.
Add employer match details
Enter your employer match rate and the cap. The calculator adds matched funds to each year of the projection.
Set growth assumptions
Enter an expected annual return rate. The year-by-year table projects growth from now until your retirement age.
Review projected balance
The dashboard shows the estimated 401k balance at retirement with totals for your contributions, employer match, and investment growth.
Built by Claude AI. Perfected by us.
We use Claude AI to draft each free template, after a deep research. Then our team steps in. We refine the layout, stress-test every formula, fix edge cases, and polish the design until it feels like something we would actually use ourselves. The AI gets us 80% there. The last 20% is all human judgment.
Frequently Asked Questions
Does it track contribution limits?
Yes. The template flags when annual employee contributions reach the IRS maximum. Update the limit field if the IRS adjusts it for a new tax year.
How does the employer match calculate?
The calculator applies the match percentage to your contribution up to the specified cap. For example, a 50% match on the first 6% of salary.
Can I include catch-up contributions?
Increase the contribution percentage or dollar amount to include catch-up amounts. The template applies the higher contribution to each projected year.
What return rate is reasonable?
Common assumptions range from 6% to 8% for long-term projections. Use a lower rate for conservative estimates or a higher one for optimistic scenarios.
How do I open this in Google Sheets?
Upload the .xlsx file to Google Drive, then open it with Google Sheets. All formulas and formatting will be preserved.
What license is this template under?
All free templates are released under CC BY 4.0 (Creative Commons Attribution). You can use, modify, and share them freely - including for commercial purposes - as long as you credit FinancialAha.com. They are provided as-is and do not constitute financial advice.
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