How Much Can I Contribute To Retirement Plan? 
It could depend on how much you earn , what the plan limitations are and how old you are . If you used a 401k plan , you can contribute $ 17,500 -LRB- providing theres no employer limitations -RRB- and if youre age 50 and older another $ 5,500 . A SIMPLE IRA can contribute $ 12,500 and if youre over age 50 an additional $ 2,500 . 