401(k) Contribution Per Paycheck Calculator
Calculate how much to contribute each paycheck to reach your 2026 401(k) limit. Include contributions already made, remaining paychecks, and age-based limits.
Calculated 2026 Contribution Per Paycheck
If you aggressively front-load contributions and hit the $24,500 statutory cap before your final paycheck, your employee contributions drop to $0 on subsequent pay periods. If your 401(k) plan does not offer an annual "True-Up" provision, your employer will stop making their matching contribution on every pay period with $0 contributions, permanently forfeiting free retirement match dollars.
Read our complete guide: Can Maxing Out Early Reduce Your Employer Match? →2026 Statutory Limits & Plan Assumptions
Official Internal Revenue Service (IRS) Cost-of-Living Adjustments (COLA) and SECURE 2.0 Act statutory provisions for Tax Year 2026:
| Participant Age Category | Standard Deferral (IRC §402(g)) | Catch-Up Limit (IRC §414(v)) | Total 2026 Employee Cap |
|---|---|---|---|
| Under Age 50 | $24,500 | N/A | $24,500 |
| Ages 50 to 59 | $24,500 | $8,000 | $32,500 |
| Ages 60, 61, 62, 63 (SECURE 2.0 Tier) | $24,500 | $11,250 | $35,750 |
| Age 64 and Older | $24,500 | $8,000 | $32,500 |
IRC §415(c) Overall Defined Contribution Cap ($72,000): Employer matching and profit-sharing contributions do not reduce your $24,500 employee elective limit; they are governed by the separate aggregate $72,000 limit ($80,000 for age 50+; $83,250 for ages 60–63).
High-Income Roth Catch-Up Mandate: Under SECURE 2.0 Section 603, workers earning over $145,000 in prior-year FICA wages from the sponsoring employer must direct all catch-up contributions to a Roth account.
Payroll Processing Lead Time: HR payroll departments typically require 1 to 2 pay periods to process deduction changes.
Worked Financial Scenarios
Scenario 1: Starting at Beginning of Year (Jan 1)
Age 32 earning $110,000 with 26 biweekly pay periods and $0 YTD contributions. 2026 limit = $24,500.
Scenario 2: Midyear Recalibration (July 1)
Age 42 earning $130,000 with 13 biweekly periods remaining and $5,500 YTD contributions already made.
Scenario 3: SECURE 2.0 Super Catch-Up (Age 61)
Age 61 earning $170,000 with 24 semimonthly pay periods and $0 YTD contributions. 2026 Limit = $35,750.
401(k) Withholding Strategy Guides
How to Max Out Your 401(k) Midyear
How to adjust withholdings when starting late, calculate remaining paychecks, and avoid payroll plan caps.
Maxing Out After Changing Jobs
How to coordinate Box 12 W-2 deferrals across employers, prevent double taxation, and request excess refunds.
Can Maxing Out Early Reduce Your Match?
Why front-loading can forfeit matching funds if your company lacks an annual true-up provision.
401(k) Catch-Up Limits by Age Bracket
Tiered rules: $24,500 under 50, $32,500 ages 50–59, and $35,750 for ages 60–63 plus $145k Roth mandates.
Regulatory Scope, Methodology & Version History
Supported Plans: Traditional 401(k), Roth 401(k), Safe Harbor 401(k), 403(b), and governmental 457(b). Exclusions: Solo 401(k) Schedule C net self-employment formulas, non-governmental 457(f), and defined benefit cash balance plans.
Developer & Quantitative Modeling: Developed by Jawad Ahmed and the Quantitative Modeling Team at Jiatrix Solutions. Automated unit test suite verifies calculations against IRS boundary cases ($0 YTD, 100% pay, edge-case pay frequencies, and SECURE 2.0 age tiers).
Update History: v2026.2 (October 2026: added SECURE 2.0 Section 109 super catch-up tier $35,750, midyear pacing, and true-up match warnings); v2026.1 (January 2026: 2026 IRS COLA baseline update).