Roth 401k Contribution Limits 2025 Catch Up. The contribution limit will increase to $23,500, up from $23,000 in 2024. Use higher 401(k) contribution limits as a 'prompt' starting in 2025, employees can defer $23,500 into 401(k) plans, up from $23,000 in 2024.

Use higher 401(k) contribution limits as a ‘prompt’ starting in 2025, employees can defer $23,500 into 401(k) plans, up from $23,000 in 2024. The 2025 catch‑up contribution limit for individuals aged 50 and over will stay at $1,000, the same rate from 2024.