<prompt> Human: My dad has 401k through his company it says years of vesting service and if you have 3 or more it is 100 percent vested which means I think they will put in 100 percent of what you put in? My dad has worked there for over 3 years. I am 25 years old still working low end job and gonna go for more schooling. My dad says if I want, me and my dad can put money into the 401k and max it out. My dad is 62 so I dont know how much longer and if he is going to retire etc... Is this a good or bad idea? My understanding is he will have his own 401k and I will help max it out for him. So that by the time he retires he will have much more money. My low end job that I work for does not have these kind of benefits. What would be nice if I could just continue putting in a lot of money into the 401k and just have it continue to compound then me and my dad can share the money.  <response>: 100 percent vested does not mean 100 percent match. The match percent is how much his employer will match him.Regardless, you putting money into his 401k is a bad idea unless your only goal is to help his retirement and not somehow profit from it. That money would be a gift to him, you would have no rights to it at all, it would be 100 his.It sounds like you dont have much money and you cant afford to provide for his retirement before your own needs. You should invest in your own retirement account, such as an IRA. 