Contribution Limit for 2018 – $18,500.00
50 – if are 50 or older you can make an addtional “catch-up” contribution of $6,000.00 in 2018 to your 401(k).
55 – If you seperated from employment with company sponsoring your plan after you turn 55 you may be able to take a distribution from your 401(k) without incurring the 10% early withdrawal fee.
59.5 – After you pass 59.5 years of age you can withdraw money from your 401(k) without incurring the 10% early withdrawal penalty
70.5 – once you exceed 70.5 years of age you must begin taking required minimum distributions (RMD) from your 401(k) plan. If you fail to due so you will be subject to a penalty.