Calculate Your 401(k) Match
Wondering how does 401k match work? Enter your details below to see your employer match breakdown, the 401k match formula applied, and a worked 401k match example based on your inputs.
Your 401(k) Match Results
Employer Match Per Year
Employer Match Per Pay Period
Match as % of Pay
Your Contribution (Capped)
Contribution to Capture Full Match
This answers how much should i contribute to 401k to get match — contribute at least this percentage to capture the full employer match.
Match Left Unclaimed
Per year at your current contribution
Vested vs. Unvested Match
How This Was Calculated
Important: Your plan's Summary Plan Description (SPD) controls the actual match formula, eligibility, timing, and vesting. This calculator uses the inputs you provide and federal limits for the selected tax year. It does not account for nondiscrimination testing, highly compensated employee limits, after-tax contributions, plan loans, or tax effects.
Long-Term Projection
This 401k growth calculator projects your balance at retirement with and without the employer match, assuming monthly compounding at your expected return. The match compounds alongside your contributions.
Line chart showing two curves: balance with match (higher) and balance without match (lower), over the years to retirement.
| Year | Age | Contributions | Employer Match | Balance With Match | Balance Without Match | Match Advantage |
|---|
The 401(k) Match Formula
The employer match is calculated by applying your plan's match formula to your eligible compensation, subject to IRS limits. The calculator uses a tier engine that works for all preset and custom formulas.
Step-by-Step Calculation
- Determine plan-eligible pay:
eligiblePay = min(salary, compensationLimit). For 2026, the compensation limit is $360,000. - Calculate your annual deferral:
deferral = min(requestedDeferral, deferralLimit + catchUpIfEligible, eligiblePay). The 2026 deferral limit is $24,500; catch-up for age 50+ is $8,000. - Convert to deferral percentage of eligible pay:
deferralPct = deferral / eligiblePay. - Apply match formula tier by tier: For each tier i with rate rᵢ and cap cᵢ (as a percent of pay):
matchTierᵢ = rᵢ × min(deferralPct, cᵢ) × eligiblePay
Sum all tiers for the total annual match. - Apply annual match cap (if any):
match = min(totalMatch, annualMatchCap). - Per-pay-period match:
matchPerPeriod = match / payFrequency(adjusted for true-up behavior if applicable).
Full-Capture Contribution Percentage
The contribution percentage that earns the maximum match is the sum of all tier caps: fullCapturePct = sum of cᵢ. For the default preset (100% of first 3% + 50% of next 2%), the full-capture contribution is 5% of pay.
Unclaimed Match
unclaimedMatch = fullCaptureMatch − currentMatch. This is the additional employer money you would receive if you increased your contribution to the full-capture level.
Vesting
Vesting determines your ownership of employer contributions. Common schedules:
- Immediate: 100% vested from day one.
- Cliff: 0% vested until the cliff year, then 100%.
- Graded: Vesting increases incrementally (e.g., 20% per year over 6 years).
The vested match shown in results is vestedMatch = match × vestingPercentage(yearsOfService).
Projection
Future value with monthly compounding:
FV = PV × (1 + r/12)^(12n) + PMT × [((1 + r/12)^(12n) − 1) / (r/12)]
Where PV = current balance, PMT = monthly contribution (your deferral + employer match) / 12, r = expected annual return, n = years to retirement. Two projections are run: one with the match included in PMT, one without.
Worked Examples
These examples use the calculator's exact arithmetic with the default 2026 limits. You can reproduce each by entering the values in the calculator above.
Example 1: Dollar-for-Dollar up to 4% (Preset A)
Inputs: Salary $80,000; Deferral 6%; Match: 100% up to 4% of pay; No annual match cap; Compensation limit $360,000; Deferral limit $24,500.
Calculation:
- Eligible pay = min($80,000, $360,000) = $80,000
- Deferral = 6% × $80,000 = $4,800 (under $24,500 limit)
- Deferral % = $4,800 / $80,000 = 6%
- Match = 100% × min(6%, 4%) × $80,000 = 100% × 4% × $80,000 = $3,200
- Match per pay period (bi-weekly) = $3,200 / 26 = $123.08
- Full-capture contribution = 4%; Unclaimed match = $3,200 − $3,200 = $0 (already at full capture)
Example 2: Two-Tier — 100% of First 3% + 50% of Next 2% (Preset C, Default)
Inputs: Salary $80,000; Deferral 5%; Match: Tier 1: 100% up to 3%, Tier 2: 50% up to 2%; No annual match cap.
Calculation:
- Eligible pay = $80,000
- Deferral = 5% × $80,000 = $4,000
- Deferral % = 5%
- Tier 1 match = 100% × min(5%, 3%) × $80,000 = 100% × 3% × $80,000 = $2,400
- Tier 2 match = 50% × min(5% − 3%, 2%) × $80,000 = 50% × 2% × $80,000 = $800
- Total match = $2,400 + $800 = $3,200 (4.00% of pay)
- Full-capture contribution = 3% + 2% = 5%; At 5% deferral, unclaimed = $0
- If deferral were 2%: Tier 1 = 100% × 2% × $80,000 = $1,600; Tier 2 = $0; Total = $1,600; Unclaimed = $3,200 − $1,600 = $1,600
Example 3: High Earner with Compensation Limit
Inputs: Salary $400,000; Deferral 6%; Match: 50% up to 6% of pay; Compensation limit $360,000; Deferral limit $24,500.
Calculation:
- Eligible pay = min($400,000, $360,000) = $360,000
- Requested deferral = 6% × $400,000 = $24,000 (under $24,500 limit)
- Deferral % of eligible pay = $24,000 / $360,000 = 6.67%
- Match = 50% × min(6.67%, 6%) × $360,000 = 50% × 6% × $360,000 = $10,800
- Note: Match is based on eligible pay ($360,000), not full salary ($400,000).
Example 4: Deferral Capped at IRS Limit
Inputs: Salary $100,000; Deferral 30%; Match: 100% up to 4%; Deferral limit $24,500.
Calculation:
- Eligible pay = $100,000
- Requested deferral = 30% × $100,000 = $30,000 → capped at $24,500
- Deferral % of eligible pay = $24,500 / $100,000 = 24.5%
- Match = 100% × min(24.5%, 4%) × $100,000 = 100% × 4% × $100,000 = $4,000
- The match is still capped at 4% of eligible pay regardless of the deferral cap.
How the Match Formula Works
✓ Included in This Calculator
- Tiered match formulas (presets + custom)
- IRS compensation limit ($360,000 for 2026)
- IRS deferral limit ($24,500 for 2026)
- Catch-up contributions (age 50+, $8,000 for 2026)
- Annual match cap (plan-specific)
- Vesting schedules (cliff, graded, immediate)
- Per-pay-period and true-up modes
- Long-term projection with monthly compounding
✗ Excluded (Not Modeled)
- Nondiscrimination testing (ADP/ACP)
- Highly compensated employee (HCE) limits
- After-tax / mega-backdoor Roth contributions
- Plan loans and hardship withdrawals
- Safe harbor notice requirements
- Federal/state income tax effects
- 403(b), 457, TSP specific rules
- SECURE 2.0 Roth catch-up (age 60-63, $11,250) — not verified
Match Left on the Table at Different Contribution Levels
Common Mistakes & Key Conditions
- Assuming the match is on your full salary: Most plans cap eligible compensation at the IRS limit ($360,000 for 2026). Match is calculated on the capped amount.
- Contributing only enough for the first tier: In a two-tier formula (e.g., 100% of first 3% + 50% of next 2%), stopping at 3% leaves the second tier unclaimed.
- Ignoring the annual deferral limit: If you front-load contributions and hit the $24,500 limit early, some plans stop matching for the rest of the year unless they true-up.
- Confusing vesting with eligibility: You may be eligible for the match immediately but not vested. Unvested match is forfeited if you leave before vesting.
- Using an "average match" figure: There is no legal standard match formula. Every plan sets its own. Check your Summary Plan Description.
- Forgetting catch-up contributions: If you're 50+, you can defer an extra $8,000 (2026), but the match may not apply to catch-up dollars depending on plan design.
- Assuming the match is always dollar-for-dollar: Many plans use 50% or tiered rates. The match percentage matters as much as the cap.
Frequently Asked Questions
How does a 401(k) match work?
Your employer contributes money to your 401(k) based on how much you contribute, up to a cap defined in the plan document. For example, "100% of the first 3% of pay" means if you contribute 3% of your salary, your employer adds another 3%. If you contribute 5%, the employer still adds only 3% (the cap).
What is the 401(k) match formula for my plan?
There is no universal formula. Your plan's Summary Plan Description (SPD) specifies the exact match rate(s), cap(s), and any tiers. Common structures include dollar-for-dollar up to a percentage, 50% up to a percentage, or multi-tier formulas. Ask your HR or plan administrator for the SPD.
What are the 2026 401(k) contribution limits?
For 2026, the IRS elective deferral limit is $24,500 (IRS Notice 2025-67). Participants age 50 or older may contribute an additional $8,000 catch-up, for a total of $32,500. The compensation limit for plan purposes is $360,000. The total annual additions limit (employee + employer) is $72,000. Source: IRS Notice 2025-67, IR-2025-111. Verified 2026-10-18.
Does the employer match count toward the $24,500 limit?
No. The $24,500 limit applies only to your elective deferrals (pre-tax or Roth). Employer matching contributions are subject to the separate total annual additions limit ($72,000 for 2026).
What is a "true-up" and does my plan have one?
A true-up ensures you receive the full annual match even if you hit the deferral limit early in the year and stop contributing. Some plans match per pay period and true-up at year-end; others stop matching once you stop deferring. Check your SPD or ask your plan administrator.
What is vesting and how does it affect my match?
Vesting is your ownership of employer contributions over time. Immediate vesting = 100% yours from day one. Cliff vesting = 0% until a specific year (often 3), then 100%. Graded vesting = gradual (e.g., 20% per year over 6 years). If you leave before full vesting, you forfeit the unvested portion.
Can I lose my employer match?
Yes, if you leave your employer before becoming fully vested, the unvested portion is forfeited back to the plan. Also, if you don't contribute enough to earn the full match, that money is simply never contributed — you "leave it on the table."
Is the 401(k) match free money?
It's often called "free money" because it's an employer contribution you receive only by contributing yourself. However, it's part of your total compensation package and may be subject to vesting. It's not guaranteed — employers can change or eliminate the match (with notice).
What if I'm a highly compensated employee (HCE)?
HCEs may be limited by nondiscrimination testing (ADP/ACP) which can reduce or delay match contributions. This calculator does not model HCE limits. Consult your plan administrator.
Does this work for 403(b), 457, or TSP plans?
This calculator is designed for 401(k) plans. 403(b), governmental 457, and the Thrift Savings Plan (TSP) have different rules, limits, and match structures. Use with caution and verify against your plan's documents.
Glossary
- Elective Deferral
- The amount you choose to contribute from your paycheck to your 401(k), pre-tax or Roth. Subject to the IRS 402(g) limit ($24,500 for 2026).
- Catch-Up Contribution
- Additional deferral allowed for participants age 50 or older ($8,000 for 2026).
- Plan-Eligible Compensation
- Your compensation used for plan calculations, capped at the IRS annual limit ($360,000 for 2026).
- Match Formula
- The plan's rule for employer matching contributions, typically expressed as a rate (e.g., 50%, 100%) applied to your deferral up to a cap (e.g., 6% of pay).
- Tiered Match
- A match formula with multiple levels, e.g., 100% of the first 3% of pay plus 50% of the next 2%.
- Full-Capture Contribution
- The deferral percentage at which you receive the maximum possible employer match (sum of all tier caps).
- Unclaimed Match
- The difference between the maximum possible match and the match you receive at your current contribution level.
- True-Up
- A year-end adjustment that ensures you receive the full annual match even if you stopped deferring mid-year after hitting the IRS limit.
- Vesting
- Your legal ownership of employer contributions over time. Unvested amounts are forfeited if you leave the employer.
- Cliff Vesting
- 0% vested until a specific year, then 100% vested.
- Graded Vesting
- Vesting increases incrementally each year (e.g., 20% per year).
- Annual Additions Limit
- The combined limit on all contributions (employee + employer) to a 401(k) ($72,000 for 2026). See the 401k contribution limits 2026 table in the FAQ for all limits.
- Summary Plan Description (SPD)
- The legal document that describes your plan's features, including the match formula, eligibility, vesting, and distribution rules.
Related Calculators
Official References & Last Checked
- IRS Notice 2025-67 — 2026 retirement plan limits: https://www.irs.gov/pub/irs-drop/n-25-67.pdf (Reference starting point)
- IRS News Release IR-2025-111 — 401(k) limit increases to $24,500 for 2026: irs.gov/newsroom/... (Reference starting point)
- IRS 401(k) Plans page: https://www.irs.gov/retirement-plans/401k-plans (Reference starting point)
- U.S. Department of Labor EBSA — 401(k) participant guidance: https://www.dol.gov/agencies/ebsa (Reference starting point)
- SEC Investor.gov — Retirement plan education: https://www.investor.gov/ (Reference starting point)
- CFPB — Consumer retirement resources: https://www.consumerfinance.gov/ (Reference starting point)
Only 2026 limits are verified from IRS sources. Other tax years and the SECURE 2.0 age 60–63 catch-up ($11,250) are NOT VERIFIED and treated as editable inputs. This calculator provides educational estimates, not financial, tax, or legal advice. Check your plan's Summary Plan Description for the authoritative match formula and rules.
Limitations, Exclusions & Assumptions
- Federal rules only: 401(k) limits are federal. State laws do not affect match calculations.
- Plan document controls: Your Summary Plan Description is the authoritative source for your match formula, eligibility, vesting, and true-up rules.
- No nondiscrimination testing: ADP/ACP testing for highly compensated employees is not modeled.
- No after-tax contributions: Mega-backdoor Roth and after-tax contributions are excluded.
- No tax effects: Results show nominal dollars. Tax treatment of traditional vs. Roth deferrals is not modeled.
- No plan loans or hardship withdrawals: These reduce account balance but are not included in projections.
- Vesting is user-entered: The calculator does not assume a vesting schedule. Enter your plan's actual schedule.
- Projection assumptions: Constant return, monthly compounding, no fees, no inflation adjustment. Actual returns vary.
- 2026 limits verified: $24,500 deferral, $8,000 catch-up, $360,000 compensation limit, $72,000 annual additions. Other years and SECURE 2.0 provisions are NOT VERIFIED.
- Client-side only: No data is sent to any server. Calculations run in your browser.
