401(k) Limits Jump to $24,500 in 2026: The Super Catch-Up Loophole That Lets 60-Year-Olds Stash $35,750

The $24,500 Number You Need to Tattoo on Your Payroll Elections

The IRS raised the 401(k) employee deferral limit to $24,500 for 2026, up from $23,500 in 2025. That is the headline. But buried in the same notice is a provision that lets workers aged 60 to 63 stash an extra $11,250 on top of the base limit—a "super catch-up" created by SECURE 2.0 that most payroll departments still do not explain clearly. If you are in that age window and you are not using it, you are leaving $3,250 on the table compared to the standard $8,000 catch-up.

And here is the catch that will bite high earners: starting in 2026, if your FICA wages exceeded $150,000 in the prior year, your catch-up contributions must go into a Roth 401(k). Pre-tax catch-ups are off the table for you. Get this wrong and the IRS recharacterizes the contribution, creating a tax mess that nobody wants to untangle.

This guide walks you through every 2026 limit, shows you the exact math for five age-and-income profiles, explains the Roth catch-up trap, and gives you a month-by-month contribution schedule so you hit your max without over-contributing.

The Complete 2026 Limit Table

Before we get into strategy, here is every number that matters for 2026, pulled directly from the IRS COLA notice :

The super catch-up for ages 60-63 did not increase because SECURE 2.0 set it at the greater of $10,000 (indexed) or 150% of the regular catch-up limit. Since 150% of $8,000 is $12,000, which exceeds the indexed $10,000 base, the 2026 super catch-up is capped at $11,250—the same as 2025.

The Roth Catch-Up Trap: What Changed in 2026

This is the rule that will trip up the most people, so let us be precise. Under SECURE 2.0 Section 604, starting with taxable years beginning after December 31, 2025, employees whose FICA wages exceeded $150,000 (indexed) in the prior calendar year must make all catch-up contributions on a Roth (after-tax) basis.

What does that mean in practice?

• If your 2025 W-2 Box 3 (Social Security wages) showed more than $150,000, every catch-up dollar you contribute in 2026 goes into a Roth 401(k) sub-account.
• You cannot make pre-tax catch-up contributions. Period.
• If your plan does not offer a Roth 401(k) option, you cannot make catch-up contributions at all.
• If you accidentally make pre-tax catch-ups, the plan must recharacterize them as Roth, and you will owe income tax on the amount in the year of the contribution.

The $150,000 threshold is indexed for inflation. The statutory base is $145,000 under IRC Section 414(v)(7), but the 2026 indexed amount is $150,000.

Case Study 1: Marcus, Age 52—The Standard Catch-Up

Marcus is a project manager in Denver earning $130,000. His employer matches 100% of the first 6% of salary. He is 52 and wants to maximize his 2026 contributions.

Step 1: Employee Deferral

• Base limit: $24,500
• Catch-up (age 50+): +$8,000
• Total employee deferral: $32,500

Step 2: Employer Match

• 6% of $130,000 = $7,800 employer match

Step 3: Check the 415(c) Ceiling

• Employee: $32,500
• Employer: $7,800
• Total: $40,300
• 415(c) limit with catch-up: $80,000
• Headroom remaining: $39,700

Marcus is nowhere near the ceiling. His binding constraint is the employee deferral limit, not the 415(c) cap.

Step 4: Roth Check

• Marcus's 2025 FICA wages: $125,000 (below $150,000)
• Verdict: He can make pre-tax catch-ups. No Roth mandate applies.

Step 5: Monthly Payroll Math

• $32,500 across 26 biweekly pay periods = $1,250 per paycheck
• $32,500 across 24 semimonthly pay periods = $1,354.17 per paycheck

Marcus should set his payroll deduction to $1,250 per biweekly paycheck starting in January. If he waits until March to increase his elections, he will need to contribute $1,625 per paycheck for the remaining 20 periods to hit $32,500.

Case Study 2: Diane, Age 61—The Super Catch-Up

Diane is a hospital administrator in Chicago earning $185,000. She is 61, which puts her squarely in the super catch-up window (ages 60-63). Her employer matches 50% of the first 8% of salary.

Step 1: Employee Deferral

• Base limit: $24,500
• Super catch-up (age 60-63): +$11,250
• Total employee deferral: $35,750

That is $3,250 more than the standard $8,000 catch-up. Over the four-year window (ages 60, 61, 62, 63), that is an extra $13,000 in tax-advantaged savings.

Step 2: Employer Match

• 8% of $185,000 = $14,800 eligible compensation
• 50% match = $7,400 employer contribution

Step 3: Check the 415(c) Ceiling

• Employee: $35,750
• Employer: $7,400
• Total: $43,150
• 415(c) limit with super catch-up: $83,250
• Headroom remaining: $40,100

Again, the employee deferral limit is the binding constraint, not the 415(c) ceiling.

Step 4: Roth Check

• Diane's 2025 FICA wages: $180,000 (above $150,000)
• Verdict: Her $11,250 super catch-up MUST go into a Roth 401(k). Her base $24,500 can still be pre-tax or Roth—the mandate only applies to the catch-up portion.

Case Study 3: Raj, Age 44—No Catch-Up, But a Generous Employer

Raj is a software engineer in Seattle earning $220,000. His employer (a large tech company) matches 100% of the first 6% and contributes an additional 4% non-elective profit sharing. Raj is 44, so no catch-up applies.

Step 1: Employee Deferral

• Base limit: $24,500
• No catch-up (under 50)
• Total employee deferral: $24,500

Step 2: Employer Contributions

• Match: 6% of $220,000 = $13,200
• Profit sharing: 4% of $220,000 = $8,800
• Total employer: $22,000

Step 3: Check the 415(c) Ceiling

• Employee: $24,500
• Employer: $22,000
• Total: $46,500
• 415(c) limit: $72,000
• Headroom remaining: $25,500

Raj has $25,500 of unused 415(c) space. Can he use it? Only if his plan allows after-tax (non-Roth) employee contributions, sometimes called "mega backdoor Roth" contributions. If his plan permits it, Raj could contribute an additional $25,500 in after-tax dollars and then convert them to Roth, effectively sheltering $49,000 in a single year.

Step 4: Compensation Limit Check

• 401(a)(17) compensation limit: $360,000
• Raj's salary: $220,000 (below the limit)
• His employer's match and profit sharing are calculated on his full $220,000, not capped.

Case Study 4: Sandra, Age 63—The Last Year of Super Catch-Up

Sandra turns 64 in November 2026. This is her last year potentially eligible for the super catch-up. She earns $95,000 as a school counselor and wants to front-load her contributions.

The Edge Case: Turning 64 Mid-Year

Here is where it gets tricky. The super catch-up applies to employees who "attain age 60, 61, 62, or 63" during the calendar year. Sandra turns 64 in November 2026. Since she attains age 64 during 2026, she is NOT in the 60-63 window for 2026. She falls back to the standard $8,000 catch-up.

Corrected Step 1: Employee Deferral

• Base limit: $24,500
• Standard catch-up (age 50+, but NOT 60-63): +$8,000
• Total employee deferral: $32,500

Step 2: Front-Loading Strategy

Sandra wants to contribute as much as possible before her birthday in November. She has 22 biweekly pay periods from January through October.

• $32,500 across 22 pay periods = $1,477.27 per paycheck
• She should set her deduction to $1,478 per paycheck for 22 periods ($32,516), then reduce to $0 for the remaining periods. The plan will automatically stop at the $32,500 limit.

Case Study 5: The High-Earning Couple—Tom and Lisa

Tom (age 55) earns $250,000. Lisa (age 53) earns $160,000. Both have 401(k) plans with a 6% match. Tom's 2025 FICA wages were $245,000 (above $150,000). Lisa's were $155,000 (also above $150,000).

Tom's 2026 Contributions

• Base deferral: $24,500
• Catch-up (age 55): +$8,000
• Total employee: $32,500
• Roth mandate: YES (2025 FICA wages > $150,000). The $8,000 catch-up must be Roth.
• Employer match: 6% of $250,000 = $15,000
• 415(c) total: $32,500 + $15,000 = $47,500 (well under $80,000)

Lisa's 2026 Contributions

• Base deferral: $24,500
• Catch-up (age 53): +$8,000
• Total employee: $32,500
• Roth mandate: YES (2025 FICA wages > $150,000). The $8,000 catch-up must be Roth.
• Employer match: 6% of $160,000 = $9,600
• 415(c) total: $32,500 + $9,600 = $42,100 (well under $80,000)

Combined Household 401(k) Contributions

• Tom employee: $32,500
• Lisa employee: $32,500
• Tom employer: $15,000
• Lisa employer: $9,600
• Total household: $89,600

That is nearly $90,000 flowing into tax-advantaged retirement accounts in a single year. And if either plan allows after-tax contributions, the mega backdoor Roth could push the household total even higher.

The Mega Backdoor Roth: Hitting $72,000

If your plan allows after-tax (non-Roth) employee contributions, you can exploit the gap between your employee deferral and the 415(c) ceiling. This is the "mega backdoor Roth" strategy.

Here is how it works for Raj (Case Study 3):

• Employee pre-tax deferral: $24,500
• Employer match + profit sharing: $22,000
• Subtotal: $46,500
• 415(c) ceiling: $72,000
• After-tax contribution room: $72,000 - $46,500 = $25,500

Raj contributes $25,500 in after-tax dollars, then immediately converts them to his Roth 401(k) sub-account (an "in-plan Roth conversion"). The $25,500 grows tax-free forever.

Total 2026 contributions: $24,500 (pre-tax) + $22,000 (employer) + $25,500 (after-tax Roth) = $72,000.

How the 2026 Limits Compare to Recent Years

The super catch-up was introduced by SECURE 2.0 in 2023 but did not take effect until 2025 for most plans. The 2026 limit of $11,250 is unchanged from 2025 because the indexing formula (greater of $10,000 indexed or 150% of the regular catch-up) produced the same result.

The Bottom Line

The 2026 limits give you more room than ever to shelter retirement savings from taxes. The $24,500 base, the $8,000 catch-up, and the $11,250 super catch-up are the building blocks. The $72,000 total ceiling is the outer boundary. And the new Roth catch-up mandate for high earners is the rule you cannot afford to ignore. Set your payroll elections in January, front-load if you can, and check whether your plan allows the mega backdoor Roth. The difference between maxing out and contributing "enough" compounds into hundreds of thousands of dollars over a career. For a broader look at how 401(k) contributions interact with your overall federal tax picture, see our guide on How to Calculate Your US Federal Income Tax in 2026.