401k Rules 2025. Under these rules, you would contribute at least 5% of your salary to get the full. These retirement rules are changing in 2025—here’s what you need to know.

For 2025, eligible taxpayers can contribute $23,500 to their 401(k) account, up from $23,000 in 2024. 29, 2022 — must automatically enroll eligible employees unless they opt out, said.