401k Calculator & Guide
Understand exactly how a 401(k) employer match formula works, how match percentages and salary caps interact, and how much your employer could contribute based on your own contributions.
A 401(k) match formula describes how your employer calculates the contribution it makes when you contribute to your workplace retirement plan.
This is the percentage of your eligible contribution that the employer agrees to match. For example, a 50% match means the employer contributes $0.50 for each $1 you contribute within the plan's match rules.
Many plans limit the amount of your salary or contribution that can be used to calculate the employer match.
The plan determines which compensation is used for its matching calculation. Your plan documents control the actual definition.
A simplified calculation can be expressed as matchable employee contributions multiplied by the employer's match percentage.
Suppose a plan says the employer matches 50% of employee contributions up to 6% of eligible salary.
The maximum contribution eligible for the match is:
So, up to $4,800 of employee contributions can be used in this simplified annual match calculation.
If the employee contributes at least $4,800 for the matching calculation:
The employer contribution under this simplified example would therefore be $2,400.
Enter the basic terms of a matching formula to estimate the annual employee contribution that qualifies and the resulting employer match.
Estimated annual employer matching contribution
Based on your contribution percentage
Amount used for the simplified match
Employee + estimated employer contribution
At the stated salary match cap
Different employers can use different formulas. These examples illustrate how the percentages affect the calculation.
| Example Formula | Salary | Employee Contribution | Matchable Amount | Employer Match |
|---|---|---|---|---|
| 100% up to 3% | $80,000 | 5% | $2,400 | $2,400 |
| 50% up to 6% | $80,000 | 10% | $4,800 | $2,400 |
| 100% up to 5% | $100,000 | 8% | $5,000 | $5,000 |
| 50% up to 8% | $100,000 | 10% | $8,000 | $4,000 |
A match formula can have a specific contribution percentage at which you receive the maximum matching contribution available under that formula.
| Employer Formula | Salary | Maximum Matchable Employee Contribution | Maximum Employer Match |
|---|---|---|---|
| 100% up to 3% | $80,000 | 3% = $2,400 | $2,400 |
| 50% up to 6% | $80,000 | 6% = $4,800 | $2,400 |
| 100% up to 5% | $100,000 | 5% = $5,000 | $5,000 |
Employer matching contributions are separate from the employee elective deferral limit, but employer contributions count toward the overall annual additions limit.
2026 employee elective deferral limit for most participants.
2026 defined contribution annual additions limit before applicable catch-up contributions.
Additional catch-up limits may apply based on age and the applicable IRS rules.
Receiving an employer match and being fully vested in that match are not always the same thing.
Your employee contributions to a 401(k) are generally immediately 100% vested, meaning those contributions and associated earnings are yours under the plan's terms.
Employer matching contributions can be subject to a vesting schedule. The specific schedule is determined by the plan, subject to applicable legal requirements.
| Example Vesting Schedule | Years of Service | Vested Percentage |
|---|---|---|
| Cliff vesting | Less than 3 years | 0% |
| Cliff vesting | 3+ years | 100% |
| Graduated vesting | 2 years | 20% |
| Graduated vesting | 3 years | 40% |
| Graduated vesting | 4 years | 60% |
| Graduated vesting | 5 years | 80% |
| Graduated vesting | 6 years | 100% |
Do not assume your employer uses a common formula. Check the documents and information provided by your plan.
Explore related guides and tools in the employer matching cluster.
Quick answers to common questions about employer matching formulas.
Use the matching formula in your plan documents to determine how your contributions translate into employer contributions, then explore the other 401(k) calculators and guides on 401k.blog.
Clear guides, useful calculators and practical retirement resources to help you understand your 401(k), contributions, employer matching, Roth options, rollovers and long-term savings.
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