Big 401(k) changes coming in 2026 — a major tax shift could impact your retirement savings

Big changes are coming to 401(k) retirement plans in 2026, and they could change how much tax you pay on your savings. The updates include higher contribution limits and a new rule that mainly affects higher-income workers. These changes are important to understand before tax season and before planning your retirement savings for 2026.

The 401(k) contribution limit for individuals will rise to $24,500 in 2026, up from $23,500 in 2025, according to IRS limits cited by Moneywise. This means workers can put more money into their 401(k) plans each year. The catch-up contribution limit for people aged 50 and older will increase to $8,000, up from $7,500 in 2025.

Higher 401(k) limits

Workers aged 60 to 63 can still make a higher “super” catch-up contribution of $11,250, and this amount stays the same as in 2025. Before 2026, catch-up contributions could be added to either a traditional pre-tax 401(k) or a Roth 401(k). Starting in 2026, workers who earned more than $145,000 in the previous year will usually be required to put catch-up contributions only into a Roth 401(k).


This rule change mainly affects higher-income workers who are over age 50. Because Roth 401(k) contributions are made with after-tax money, this change can increase taxable income in the next tax year. High earners who rely on pre-tax 401(k) contributions to lower their tax bill could feel a big impact from this shift. Workers who have not yet maxed out their catch-up contributions for 2025 may want to consider doing so before year-end.

Roth vs traditional 401(k)

Roth 401(k) contributions are made after tax, while traditional 401(k) contributions are taken from income before tax, which lowers taxable income, as stated by Moneywise. Qualified withdrawals from Roth 401(k)s are tax-free, including profits earned on investments. Roth 401(k)s also do not require required minimum distributions, known as RMDs. Withdrawals from traditional 401(k)s are taxed as income, and required minimum distributions must be taken to avoid penalties.

Many retirees expect to be in a lower tax bracket later in life, which is why traditional 401(k)s have been popular. For 2026, married couples earning more than $201,775 fall into a 32% marginal tax bracket, according to IRS data cited by Moneywise. A 60-year-old in this tax bracket making a $11,250 super catch-up contribution could pay around $3,600 in taxes. Even though taxes are paid upfront, Roth 401(k) withdrawals and earnings are not taxed later if rules are followed.

Workers who may be affected should ask their employer whether a Roth 401(k) option is available. Data from the Plan Sponsor Council of America shows that 95.6% of employers already offer a Roth contribution option. People who expect to earn more than $145,000 in the future and plan to make catch-up contributions should consider speaking with a financial advisor to adjust their retirement strategy.

FAQs

Q1. What is the big 401(k) change in 2026 for high earners?

High earners may have to make catch-up 401(k) contributions only to Roth accounts, which means paying tax now instead of later.

Q2. How much can you contribute to a 401(k) in 2026?

The 401(k) limit rises to $24,500, with higher catch-up limits for workers aged 50 and above.