401(k)
A 401(k) is the most common type of employer-sponsored retirement plan. Your employer preselects a few investment choices, and you defer a portion of each paycheck to the account. If you leave your job, you may take your 401(k) funds with you or leave them where they are.
In 2025, you can contribute up to $23,500 to a 401(k) if you're under age 50. Adults ages 50 to 59 and 64 or older may contribute up to $31,000 and those ages 60 to 63 may contribute up to $34,750.
The 2026 limit is $24,500 for people younger than 50. Workers ages 50 to 59 and 64 or older may contribute up to $32,500, while those ages 60 to 63 can contribute up to $35,750.
Some employers also match a portion of employee contributions. With few exceptions, you cannot withdraw funds from your 401(k) before age 59 1/2 without penalty.