2024 401k Maximum Deferral. 2024 2025 401k/403b/457/tsp elective deferral limit. For 2024, the 401 (k) contribution limit for employees is $23,000, or $30,500 if you are age 50 or older.
$19,500 in 2020 and 2021 and $19,000 in 2019), plus $7,500 in 2023;. I estimate it will go up by $1,000 to $24,000 in 2025 (or $23,500.