Core Points - The IRS announced new regulations affecting 401(k) catch-up contributions starting in 2026, particularly for high-income earners [1][4] - An income test will be implemented, where individuals earning over $145,000 will only be able to make catch-up contributions to a Roth 401(k) [4][5] - This change introduces an upfront tax burden for high-income earners, as contributions to a Roth 401(k) are made with after-tax income [5] Summary by Sections Contribution Limits - For 2025, all workers can contribute up to $23,500 into 401(k) plans, with those over 50 allowed to make additional catch-up contributions [3] Income Test Implementation - Starting in 2026, workers earning over $145,000 will face restrictions on their catch-up contributions, limiting them to Roth 401(k) plans [4] Tax Treatment Differences - Standard 401(k) contributions are made pre-tax, allowing for tax deductions, while Roth 401(k) contributions are made after-tax, resulting in no immediate tax benefits [5] Impact on Workers - Approximately 20% of individuals aged 45 to 54 earn over $100,000, indicating that millions could be affected by the new regulations [6] - Employers are encouraged to confirm if they offer a Roth 401(k) plan, as nearly 93% do [6]