Social Security Max 2024 Contribution Over 50. Here are the limits for 2024: For individuals under the age of 50, the maximum 401 (k) plan contribution for 2024 is set at $23,000, signaling a notable increase of $500 from the previous year.

401 (k), 403 (b) and 457 elective deferral limit: Case a, born in 1962,.