Disclaimer: This article is for educational purposes only and is not tax, legal, or financial advice. Tax rules change periodically, always check current IRS/state guidance or consult a professional.
Paycheck Calculator (US)
Quick Answer: How do 2026 catch-up contributions affect my paycheck?
For 2026, workers age 50 and older can save an extra $8,000 on top of the $24,500 elective deferral limit. Workers age 60 to 63 can save up to $11,250 as a super catch-up if their employer's plan adopts the feature. If your prior-year FICA wages from the same employer topped $150,000, the catch-up portion must be Roth (post-tax) rather than traditional (pre-tax).
The biweekly paycheck math: an $8,000 traditional catch-up is $307.69 per paycheck, and the actual net-pay reduction is roughly $200 to $240 once federal and state tax savings come back to you. A forced-Roth catch-up at the same dollar amount drops net pay by the full $307.69 because there is no current-year tax deduction.
Key Takeaways
- The 2026 elective deferral limit is $24,500. Workers 50 and older can add an $8,000 catch-up. Workers 60 to 63 can add an $11,250 super catch-up if the plan offers it.
- The mandatory Roth rule starts in 2026. If your 2025 FICA wages from the same employer exceeded $150,000, your entire catch-up must be Roth (post-tax).
- Pre-tax catch-ups cut income tax, not FICA. Traditional contributions reduce federal and state income-tax withholding, but Social Security and Medicare still apply to gross wages.
- Roth catch-ups reduce net pay dollar for dollar. Expect roughly $90 to $100 more per biweekly paycheck taken home compared with the equivalent traditional contribution at the 22 to 24 percent marginal bracket.
- The super catch-up is optional. Employers can decline to adopt it. Confirm with HR before you assume the $11,250 limit applies to your plan.
What Changed for 2026: The Three New Catch-Up Tiers
The IRS announced the 2026 retirement plan limits in IR-2025-111 on November 13, 2025. Three rules now apply to anyone age 50 and older:
- Age 50 to 59 and 64 plus: the standard catch-up rises to $8,000, up from $7,500 in 2025. Combined with the $24,500 elective deferral, the maximum total is $32,500.
- Age 60 to 63: the super catch-up stays at $11,250, unchanged from 2025. Combined with the $24,500 deferral, the maximum total is $35,750. This tier is an optional plan feature under SECURE 2.0, so your employer must elect to offer it.
- High earners (any age 50 plus): if your prior-year FICA wages from the same employer exceeded $150,000, the catch-up portion of your contribution must be Roth (post-tax). The threshold was raised from the statutory $145,000 by IRS Notice 2025-67 and is indexed to inflation.
The Roth catch-up rule applies to plan years beginning after December 31, 2025. Plans must amend their documents by December 31, 2026 (2028 for collectively bargained plans, 2029 for governmental plans), but the IRS will accept good-faith compliance starting January 1, 2026.
How Catch-Up Contributions Affect Your Paycheck (the Basics)
Three withholding rules drive every catch-up paycheck calculation:
- Traditional (pre-tax) catch-ups reduce federal and state income-tax withholding because they lower Box 1 taxable wages. The formula employers run through Publication 15-T sees a smaller wage and returns a smaller withholding amount.
- Roth (post-tax) catch-ups reduce only your net pay. Box 1 wages and withholding stay the same; the contribution comes out of after-tax dollars.
- Neither type reduces FICA. Social Security (6.2 percent up to the $184,500 wage base in 2026) and Medicare (1.45 percent, plus 0.9 percent Additional Medicare on wages over $200,000 single) apply to gross pay before any 401(k) deduction.
Here is the mental model that makes the math click: paycheck reduction = contribution minus marginal tax savings. For a traditional catch-up, multiply the contribution by your combined federal and state marginal rate, then subtract that figure from the contribution itself. The remainder is what actually leaves your check. For a Roth catch-up, the marginal tax savings is zero, so the paycheck reduction equals the full contribution.
State income tax matters here. In high-tax states like California, Oregon, or New York, a pre-tax catch-up earns a meaningful state-tax savings on top of the federal benefit. In Texas, Florida, Washington, and other states with no income tax, only the federal benefit applies. See which states tax wages for the current list.
Use our paycheck calculator to model these scenarios with your salary, state, and filing status before you update your HR portal.
Worked Example: $80,000 Salary, Age 55 (Standard Catch-Up)
Sara is 55, single, and earns $80,000 in California. She is paid biweekly (26 paychecks per year). She wants to max her catch-up: $8,000 annual contribution divided across 26 paychecks equals $307.69 per pay period.
Because her FICA wages stayed under $150,000 last year, she can use a pre-tax traditional catch-up.
The numbers
- Gross per paycheck: $3,076.92
- Net before catch-up: $2,322.59
- Net after $307.69 catch-up: $2,110.53
- Per-paycheck reduction: $212.06
- Tax that came back to her: $95.63 (federal plus California income tax savings)
So Sara saves $307.69 toward retirement but feels only $212.06 of it in her paycheck. The remaining $95.63 is current-year tax she would have owed anyway, now redirected into her 401(k). Annualized, she saves $8,000 for retirement and reduces her 2026 federal and state tax bill by about $2,486.
Worked Example: $120,000 Salary, Age 61 (Super Catch-Up)
Marcus is 61, single, and earns $120,000 in Texas. He is paid biweekly. His employer adopted the optional age 60 to 63 super catch-up, so he can contribute $11,250 on top of the $24,500 elective deferral. The super catch-up alone is $432.69 per paycheck.
His 2025 FICA wages were $120,000, so he stays under the $150,000 Roth threshold and can run the catch-up as traditional.
The numbers
- Gross per paycheck: $4,615.38
- Net before catch-up: $3,586.54
- Net after $432.69 catch-up: $3,249.04
- Per-paycheck reduction: $337.50
- Tax that came back to him: $95.19 (federal only; Texas has no state income tax)
Marcus is solidly in the 22 percent federal bracket, so his marginal tax savings cover roughly $95 of every $432.69 super catch-up. Annualized: $11,250 saved for retirement and about $2,475 in federal tax savings. If Marcus lived in California instead of Texas, the state-tax piece would push his per-paycheck savings closer to $135 and reduce his net-pay impact to roughly $298.
One important caveat: the super catch-up is optional. If Marcus's employer never amended the plan, his maximum 2026 contribution would be the standard $24,500 deferral plus the $8,000 standard catch-up, not $35,750. Always confirm with HR before you assume the higher tier applies.
Worked Example: $200,000 Salary, Age 55 (Mandatory Roth Catch-Up)
Priya is 55, single, and earns $200,000 in New York. Her 2025 FICA wages from the same employer were $200,000, well above the $150,000 threshold. Under the new SECURE 2.0 rule, her entire $8,000 catch-up must be Roth in 2026.
Her per-paycheck catch-up is the same $307.69 dollar amount as Sara's, but the tax treatment is different.
The numbers
- Gross per paycheck: $7,692.31
- Net before catch-up: $5,220.88
- Net after $307.69 Roth catch-up (mandatory): $4,913.19
- Net after $307.69 traditional catch-up (no longer permitted, shown for comparison): $5,005.19
- Per-paycheck cost of the new Roth rule: $92.00
Priya's net pay drops by the full $307.69 per paycheck because Roth contributions do not reduce taxable wages. If the law still permitted her to make the catch-up pre-tax, she would keep an extra $92 per paycheck (about $2,400 per year) in current-year cash flow. That tax break is not lost; it is deferred. Roth withdrawals are tax-free in retirement, so Priya effectively prepays her tax in 2026 in exchange for tax-free growth and tax-free distributions later.
If Priya's plan does not offer a Roth option, she cannot make any catch-up contribution at all in 2026. She would be capped at the standard $24,500 elective deferral until the plan adds Roth.
The "Max It Out" Cheat Sheet by Pay Frequency
HR portals ask for a dollar amount or a percentage per paycheck, not an annual target. Use these per-paycheck numbers to hit each 2026 limit exactly.
Standard catch-up: $8,000 (ages 50 to 59 and 64 plus)
- Monthly (12 paychecks): $666.67
- Semimonthly (24 paychecks): $333.33
- Biweekly (26 paychecks): $307.69
- Weekly (52 paychecks): $153.85
Super catch-up: $11,250 (ages 60 to 63, plan must adopt)
- Monthly (12 paychecks): $937.50
- Semimonthly (24 paychecks): $468.75
- Biweekly (26 paychecks): $432.69
- Weekly (52 paychecks): $216.35
Combined deferral plus catch-up (everyone 50 plus)
- Age 50 to 59 / 64 plus, biweekly: $32,500 / 26 = $1,250.00 per paycheck
- Age 60 to 63 (with super catch-up), biweekly: $35,750 / 26 = $1,375.00 per paycheck
Two practical notes. First, if your 401(k) plan stops accepting contributions once you hit the annual limit, front-loading early in the year does not change your annual cap, but it does mean larger paychecks later in the year (and may forfeit employer match if matching is paycheck-by-paycheck rather than true-up). Second, biweekly schedules with 27 pay periods (which happens roughly every 11 years) require dividing by 27 instead of 26.
Action Steps Before Year-End
The 2026 plan year is already underway, but most plan administrators allow mid-year deferral changes. Use this checklist to make sure your election lines up with the new rules.
- Check your 2025 W-2 Box 3 (Social Security wages). If it exceeds $150,000 with the same employer that runs your 401(k), all of your 2026 catch-up must be Roth.
- Confirm Roth availability. If you are over the threshold and your plan does not offer Roth, your catch-up is unavailable until the plan adds it. Ask HR or benefits to confirm in writing.
- Ask whether your plan adopted the age 60 to 63 super catch-up. If yes, you can target $35,750 instead of $32,500. If no, plan around the standard $32,500 cap.
- Update your deferral election. Use the per-paycheck targets in the cheat sheet above. Most HR portals accept either dollar amounts or percentages.
- Run your numbers. Plug your salary, state, filing status, and proposed contribution into the EHM Paycheck Calculator to see exactly how your net pay will change.
- Revisit your W-4. A larger pre-tax catch-up reduces taxable wages and may also reduce credits or extra withholding you previously needed. See our W-4 walkthrough for the specific steps.
2026 Catch-Up Paycheck Examples
Three biweekly scenarios showing how the new tiers translate into net pay. All figures use 2026 federal tax tables (IRS Rev. Proc. 2025-32) and current state withholding tables.
- Annual catch-up: $8,000 (standard tier)
- Per paycheck: $307.69
- Gross per paycheck: $3,076.92
- Net before catch-up: $2,322.59
- Net after catch-up: $2,110.53
- Net pay reduction: $212.06 per paycheck
- Federal plus state tax savings: $95.63 per paycheck
- Annual catch-up: $11,250 (age 60 to 63 super tier, plan-dependent)
- Per paycheck: $432.69
- Gross per paycheck: $4,615.38
- Net before catch-up: $3,586.54
- Net after catch-up: $3,249.04
- Net pay reduction: $337.50 per paycheck
- Federal tax savings: $95.19 per paycheck (no state tax in TX)
- Annual catch-up: $8,000 (must be Roth because 2025 FICA wages exceeded $150,000)
- Per paycheck: $307.69
- Gross per paycheck: $7,692.31
- Net before catch-up: $5,220.88
- Net after Roth catch-up: $4,913.19
- Net pay reduction: $307.69 per paycheck (full contribution; no current-year tax break)
- Cost of Roth requirement vs. traditional: $92.00 more per paycheck
Frequently Asked Questions
Troubleshooting and Tips
- Pull your 2025 W-2 before changing your election. Box 3 (Social Security wages) tells you whether you are over or under the $150,000 Roth threshold for 2026 catch-ups.
- Ask HR two questions in one email. Did the plan adopt the age 60 to 63 super catch-up, and does the plan offer a Roth deferral option? Both answers determine your maximum 2026 contribution.
- Watch out for employer match true-up rules. Front-loading catch-ups early in the year can forfeit match dollars if your employer matches paycheck-by-paycheck without an annual true-up.
- Recheck your W-4 after raising deferrals. A larger pre-tax catch-up lowers taxable wages and may change whether you need extra withholding in Step 4(c). Run the IRS Tax Withholding Estimator after one or two pay periods.
- Job changes reset the $150,000 threshold. The Roth rule is per-employer, so starting at a new employer mid-year may move you back under the threshold for that plan's 2026 contributions.
- Model the change before submitting. Run your salary, state, and proposed contribution through the EHM Paycheck Calculator to confirm net pay before you commit to a new election.
References
- IRS IR-2025-111 — 2026 401(k) limits announcement — Official IRS press release announcing the $24,500 elective deferral, $8,000 standard catch-up, and $11,250 super catch-up for 2026.
- IRS Notice 2025-67 (PDF) — 2026 retirement plan dollar amounts including the $150,000 Roth catch-up wage threshold for high earners.
- IRS Final Regulations on the Roth Catch-Up Rule — Final regulations under SECURE 2.0 covering the mandatory Roth catch-up, plan amendment deadlines, and good-faith compliance.
- SSA Press Release — 2026 Social Security Wage Base — Confirms the 2026 Social Security wage base of $184,500, used for FICA calculations on catch-up paychecks.
- Charles Schwab — Catch-Up Contributions 2025 and 2026 Guide — Plain-language overview of the standard, super, and Roth catch-up tiers for retirement savers.
- Kiplinger — SECURE 2.0 Super Catch-Up for Ages 60 to 63 — Background on the optional age 60 to 63 super catch-up tier and how plans elect to offer it.