401k Calculator

Introduction

Estimate how a 401k balance could grow using current balance, employee contributions, employer match, assumed return, and years invested.

About this 401k tool

401k Calculator is designed for a focused everyday task where a quick browser-based calculation or conversion is more useful than a full spreadsheet. Review the inputs carefully, then use the result as a practical planning aid.

How this tool works

Enter the values requested by the page, review the result, and change one input at a time if you want to compare scenarios. Keeping the assumptions visible makes the output easier to interpret and easier to verify elsewhere.

1. Enter current balance, salary, annual employee contribution, employer match percentage, expected return, and years.
2. Review projected balance, total contributions, estimated employer match, and growth.
3. Change one assumption at a time to compare savings scenarios.

When to use this tool

Use the tool for quick checks, estimates, and everyday planning. For official, regulated, legal, tax, payroll, medical, or high-value decisions, verify the result with the relevant provider, authority, or qualified adviser.

Good to know

• Estimates only. This does not model tax law changes, plan fees, vesting, catch-up rules, loans, withdrawals, investment volatility, or exact IRS limits.
• Check IRS guidance, employer plan documents, fund fees, and professional advice before making retirement decisions.

Country-specific assumptions

• US rates vary by state, city, county, lender, employer plan, and tax year.
• Sales tax presets are examples only; enter the combined local rate that applies to your purchase.
• Salary and 401k results are estimates only and should be checked against IRS guidance, payroll records, lender documents, or professional advice.

Results are estimates only. Do not use this page as regulated financial, tax, legal, payroll, mortgage, or investment advice; check official government sources, provider documents, or a qualified professional before making final decisions.