Author: Hazel Secco, CFP®, CDFA®
Estimated reading time: 9 minutes
I explain the whole change, and who should actually be glad about it, in this video:
Table of contents
- What changed with 401(k) catch-up contributions in 2026?
- Who does the mandatory Roth catch-up rule apply to?
- The 2026 contribution limits at a glance
- What the change costs you: a worked example
- Why this rule might quietly work in your favor
- What to Do This Week
- Frequently Asked Questions
- Want the full picture?
If you are 50 or older, earn a healthy income, and make catch-up contributions to your 401(k), a rule you probably never voted on changed your paycheck this January. Many people found out from a benefits email they almost deleted, or from a paystub that suddenly showed a Roth line they never elected.
Here is the short version: starting January 1, 2026, if your Social Security wages from your employer were over $150,000 in 2025, your 401(k) catch-up contributions can no longer go in pre-tax. They must be Roth. That means the tax deduction you used to get on those dollars is gone, and you will feel it in this year’s tax bill.
This article covers who the mandatory Roth catch-up rule catches, exactly what it costs at your bracket, the situations where it quietly helps you, and the decisions worth making before December instead of discovering next April.
What changed with 401(k) catch-up contributions in 2026?
Beginning January 1, 2026, workers age 50 and older whose prior-year Social Security wages from their employer exceeded $150,000 must make 401(k) catch-up contributions as Roth contributions rather than pre-tax. The rule comes from the SECURE 2.0 Act, and the IRS finalized the regulations in September 2025 after a two-year delay.
Congress wrote this into SECURE 2.0 back in 2022, originally effective for 2024. The IRS pushed the start date to 2026 to give payroll systems time to catch up, which is why the change felt like it arrived out of nowhere this year. The wage threshold started at $145,000 in the statute and is indexed for inflation; the IRS set it at $150,000 of 2025 wages for determining who is covered in 2026.
One important nuance: the test uses your Social Security wages (Box 3 of your W-2) from the employer that sponsors your plan, for the prior calendar year. Not your total household income, not your salary this year, and not wages from a previous employer.
Who does the mandatory Roth catch-up rule apply to?
You are subject to the rule in 2026 if all three are true: you are 50 or older, you contribute beyond the standard employee limit, and your 2025 Social Security wages from your current employer were over $150,000. If any one of those is false, nothing changes for you this year.
That prior-year, same-employer detail creates some outcomes that surprise people:
- You changed jobs this year. If you had no 2025 wages from your new employer, the rule does not apply to you at that employer in 2026, no matter what you earn now. It can pick you up in 2027.
- You are self-employed. Partners and sole proprietors with self-employment income rather than W-2 Social Security wages are not caught by the rule, because the test only counts FICA wages.
- Your plan has no Roth option. This is the trap. A plan is not required to add a Roth feature, and if it does not have one, anyone covered by the rule simply cannot make catch-up contributions at all. If your benefits portal will not accept your catch-up election this year, this may be why, and it is worth a direct question to HR.
Many plans now use what the regulations call a deemed Roth election: your existing catch-up election is automatically converted to Roth, and the paycheck line changes without you touching anything. You keep the right to change or stop the contribution, but the default flips.
The 2026 contribution limits at a glance
For 2026, the employee deferral limit is $24,500, the age 50 catch-up is $8,000, and the higher catch-up for ages 60 through 63 is $11,250. Only the catch-up portion is subject to the mandatory Roth rule; your first $24,500 can stay pre-tax regardless of income.
| 2026 limit | Amount | Subject to mandatory Roth? |
|---|---|---|
| Employee deferral (any age) | $24,500 | No, stays pre-tax if you want |
| Catch-up, age 50 to 59 and 64+ | $8,000 | Yes, if 2025 wages over $150,000 |
| Catch-up, age 60 to 63 | $11,250 | Yes, if 2025 wages over $150,000 |
| IRA contribution | $7,500 plus $1,100 catch-up | Not affected by this rule |
These are the same figures I track in my 2026 tax and financial planning numbers guide.
What the change costs you: a worked example
Here is a hypothetical composite. An executive, age 56, earned $280,000 in Social Security wages in 2025 and contributes the full $24,500 deferral plus the $8,000 catch-up in 2026. Her marginal federal rate is 35%.
Through 2025, the entire $32,500 went in pre-tax. In 2026, the $8,000 catch-up must be Roth, so she loses the deduction on that slice. At 35%, that is $2,800 more federal tax this year. Her take-home pay drops by roughly that amount even though her contribution election never changed, which is the line-item surprise showing up on paystubs this year.
The $2,800 does buy something, though: tax settled at a known rate. The $8,000 now grows entirely tax-free, comes out tax-free in retirement, and never generates a required minimum distribution. Whether that trade helps or hurts depends on the rate you would otherwise pay when the money comes out, which is the same question that drives the Roth versus traditional 401(k) decision in every other year of your career.
Why this rule might quietly work in your favor
For many high-earning women, forced Roth catch-ups fix a problem they did not know they had: almost everything they own is pre-tax. Decades of maxing a traditional 401(k) builds a large deferred tax bill that comes due through required minimum distributions, often at rates no lower than the ones avoided along the way, and sometimes higher for a surviving spouse filing single.
Roth catch-ups add tax-free dollars to that picture automatically, eight thousand at a time. Paired deliberately with moves like the Roth conversion window in lower-income years, the rule becomes less of a penalty and more of a nudge toward the tax diversification you wanted anyway. Whether to keep maxing the pre-tax portion is its own decision, and I wrote about when that answer changes in should I max out my 401(k).
The retirement-side version of this thinking, deciding which accounts to fill and which to draw from so lifetime taxes stay low, is the heart of the Retirement Tax Playbook.
What to Do This Week
- Check one paystub. Look for a Roth 401(k) or designated Roth line you did not elect. If it appeared in January, your plan flipped you automatically and your withholding math for the year should account for it.
- Confirm your plan has a Roth option. If it does not, ask HR directly whether employees covered by the rule can make catch-up contributions at all this year. If the answer is no, that $8,000 of savings capacity needs a new home, such as a taxable brokerage account invested deliberately.
- Recheck your 2026 tax projection. If you lost the deduction on $8,000 (or $11,250 at ages 60 to 63), your estimated liability moved. Adjust withholding now rather than meeting the difference in April.
- Revisit the pre-tax question on the rest. The first $24,500 is still your choice. If the forced Roth slice started you thinking about tax diversification, decide on purpose how the bigger piece should go for the rest of your career.
Frequently Asked Questions
Do Roth catch-up contributions count toward the same limit?
Yes. The 2026 catch-up limit is $8,000 (or $11,250 at ages 60 to 63) whether the dollars go in pre-tax or Roth. The rule changes the tax treatment of the contribution, not the amount you are allowed to put in.
Does the $150,000 threshold include bonuses and RSUs?
Generally yes. The test uses Social Security wages, Box 3 of your W-2, which includes salary, bonuses, and vested RSU income up to the Social Security wage base for the year. If equity compensation pushed your 2025 Box 3 over $150,000, you are covered by the rule in 2026 even if your base salary is under the threshold.
Can I avoid the rule by contributing to an IRA instead?
The rule does not apply to IRAs, but an IRA is rarely a substitute at this income level. The 2026 IRA limit is $7,500 plus a $1,100 catch-up, deductibility phases out at these income levels when you are covered by a workplace plan, and direct Roth IRA contributions phase out too. For most high-net-worth women the practical answer is to accept the Roth catch-up and plan around it rather than reroute the dollars.
Is a Roth catch-up bad for me?
Not necessarily. You give up a deduction today at your current marginal rate and buy tax-free growth and withdrawals later. If your retirement tax rate will be lower than today’s, the forced Roth costs you something real. If your pre-tax balances are already large enough that required distributions will keep your future rate high, the rule is pushing you toward a mix you likely needed. The answer requires a projection, not a rule of thumb.
Want the full picture?
If you want the complete breakdown, including the three advisor compensation models, why tax preparation isn’t tax planning, and the four questions every high-net-worth woman should ask her advisor, download my free guide, 7 Things Nobody Teaches Independent Women About Building Wealth. It’s a 15-minute read.
Hazel Secco, CFP®, CDFA®, is the founder of Align Financial Solutions, a fee-only fiduciary firm in Hoboken, New Jersey, that helps high-net-worth women bring retirement, equity compensation, tax, and estate planning into one plan.
Book a free 15-minute Align Call: https://alignfinancialsolutions.com/book-a-call/
Whether we work together or not, you’ll walk away with clarity on your best next step.
https://alignfinancialsolutions.com · https://www.youtube.com/@AlignYourRetirement · https://linkedin.com/in/hazel-secco
Disclaimer: Advisory services are offered through Align Financial Solutions LLC (“AFS”), an Investment Advisor in the State of New Jersey. This article is for educational purposes only and does not constitute personalized tax, legal, investment, or financial planning advice. Rules and figures are current for 2026 and subject to change. All client scenarios are hypothetical composites for illustration and do not represent any specific client outcome. Consult a qualified professional about your specific situation.
Sources
- IRS, IR-2025-111, 401(k) limit increases to $24,500 for 2026: https://www.irs.gov/newsroom/401k-limit-increases-to-24500-for-2026-ira-limit-increases-to-7500
- IRS Notice 2025-67, 2026 amounts relating to retirement plans and IRAs (Roth catch-up wage threshold): https://www.irs.gov/pub/irs-drop/n-25-67.pdf
- IRS, Retirement topics, catch-up contributions: https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-catch-up-contributions