You can't generally retroactively change Roth 401(k) contributions made in 2024 to pre-tax contributions for 2025. Contributions are locked in based on the year they were made
However, you can switch your future contributions to pre-tax for 2025. Here's how:
- Go online to your 401(k) account: Log in to your 401(k) account through your plan provider's website and update your contribution type to pre-tax.
- Contact your HR department: Reach out to your HR department and inform them of your decision to switch your contributions to pre-tax. They can help you update your payroll settings accordingly.
See IRS guidelines.
