Employer Match Math: Don't Leave Money on the Table

An employer match is the only place in the financial world offering a guaranteed instant return of 25%, 50%, or 100%. Roughly one in five eligible employees still leaves match dollars on the table every year. Here is how to make sure you are not one of them.

The common formulas

• Simple dollar-for-dollar match to a percentage of pay. "100% of the first 3%" — defer 3% of salary and the employer adds another 3%.
• Tiered match. "100% of the first 3% plus 50% of the next 2%." Maxing requires 5% deferral; the employer contributes 4%. This is the standard safe-harbor formula under §401(k)(12).
• Stretch match. "50% of the first 6%" or "25% of the first 8%." Same employer maximum but requires a higher employee deferral rate to capture it. Used by employers who want to push savings behavior.
• Discretionary match. Set annually by the employer; common in profit-sharing arrangements.

The front-loading trap

If your plan funds the match on a per-pay-period basis (most do), front-loading your full $23,500 deferral into the first half of the year stops the deferral once you hit the §402(g) cap — and stops your match with it. A worker who defers $23,500 in six months and then stops can lose the second half of the year's match entirely. The fix: defer evenly across all 26 pay periods so the match accrues every payroll.

The true-up provision

A "true-up" reconciles the match at year-end to ensure you receive the full annual match regardless of pay-period timing. Plans with a true-up restore lost match for front-loaders; plans without one do not. Check your Summary Plan Description for the words "annual true-up" — it is the single most important match provision and it is usually buried.

Worked example

Salary: $200,000. Match formula: 100% of first 3% + 50% of next 2%. Max match = 4% of pay = $8,000.

• Even deferral, no true-up: defer 5% per pay period all year. Receive full $8,000 match.
• Front-loaded deferral, no true-up: defer 25% per pay period until you hit $23,500 in May, then stop. You captured the match only for the first five months — about $3,333. Lost: $4,667.
• Front-loaded deferral, with true-up: same deferral pattern, but the plan tops you up at year-end. Receive full $8,000 match.

SECURE 2.0 student-loan match

SECURE 2.0 §110, effective for plan years beginning after December 31, 2023, lets employers treat an employee's qualified student loan payment as if it were a 401(k) elective deferral for purposes of the match. The employee gets the match without having to defer salary — useful for early-career employees too cash-constrained to save while paying down debt. The provision is optional for employers; ask whether your plan has adopted it.

Vesting interacts with match

Match contributions vest on a schedule under IRC §411 — typically 3-year cliff or 6-year graded. If you leave before fully vested, the unvested portion is forfeited. Safe-harbor match contributions are immediately 100% vested by statute. Confirm your vesting schedule before timing a job change.

Common mistakes

• Stopping at the match. The match is the most efficient use of the first few percent of deferral, but the additional pre-tax space up to $23,500 is still very valuable.
• Misreading the formula. "100% match up to 3% of salary" caps at 3%, not 6%. The employer's maximum equals the lower of the stated percentage cap or the dollar of pay it represents.
• Missing match on a switched job. Two employers in one year, with the second employer's match formula assuming you have unused deferral capacity. You may already be at the $23,500 cap from employer #1.
• Not asking about the discretionary match at year-end. Some employers fund a year-end profit-share or true-up that does not show up on pay stubs. Ask HR.

Sources

• Internal Revenue Code §401(k)(12), safe harbor formula (Cornell LII): law.cornell.edu/uscode/text/26/401
• Internal Revenue Code §411, minimum vesting standards: law.cornell.edu/uscode/text/26/411
• SECURE 2.0 Act §110, student-loan match provision, Pub. L. 117-328: congress.gov/bill/117th-congress/house-bill/2617
• IRS Notice 2024-63, student-loan match interim guidance: irs.gov/pub/irs-drop/n-24-63.pdf
• U.S. Department of Labor, "401(k) Plans for Small Businesses": dol.gov/ebsa publications

RetirementCheck101 calculates your true match opportunity, including the §401(a)(17) cap and the front-loading risk. Explore the free educational tool.