New 401(k) Rule Change in 2026: Starting in 2026, many Americans who save extra money for retirement will notice an important change. People who use catch-up contributions to grow their retirement funds will have to follow a new IRS rule. This rule affects how some workers can save their extra money. It mainly targets higher-income earners and changes how their savings get taxed.
Catch-up contributions help workers who are 50 years old or more. These workers often want to save more as they get closer to retirement. Right now, they can put this extra money into a traditional account or a Roth account. Traditional accounts lower taxes today, while Roth accounts use after-tax money and give tax-free income later. This choice will not fully exist anymore for some people starting in 2026.
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Who the New Rule Affects?
The new IRS rule affects workers who earned more than $145,000 in the previous year. From 2026, these workers must put all catch-up savings into a Roth account. This applies to plans like 401(k), 403(b), 457(b), SEP IRA, and SIMPLE IRA.
Workers who earn $145,000 or less do not need to worry. For them, nothing changes. They can still choose whether their catch-up money goes into a traditional account or a Roth account. The same rule applies to people who already save only in Roth accounts.
The amount people can save will not change. In 2025, workers under 50 can put up to $23,500 into retirement plans. Workers aged 50 and above can add another $7,500 as catch-up contributions. These limits stay the same. Only the tax treatment of the extra money changes for higher earners.
How this will Change Retirement Planning?
For workers affected by the rule, catch-up contributions will no longer reduce taxes right away. Instead, they will pay taxes first and enjoy tax-free withdrawals after retirement. This can feel tough for people who are close to retirement and already paying high taxes.
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Some financial experts say the change can still be helpful. Roth accounts give tax-free income later, which can help control taxes during retirement. They also help if tax rates rise in the future. This can give more freedom when taking money out after retiring.
There is a downside as well like paying taxes now means higher tax bills during the last working years. For people who expect to earn less after retirement, losing the pre-tax option may not feel fair. Even so, planners remind workers that the rule does not stop saving. It only changes when taxes are paid.
