Lestat said:
401k = pre tax contributions, get taxed when you pull it out
IRA = post tax contributions, no taxes with you pull it out
there are also some other little benefits, with most IRAs you can pull interest you have made out tax free after certain criteria has been met
with 401k you can loan against the balance and pay the principle and interest back to yourself (with POST tax dollars though)
Thats not true, a 401k or 403b is the same as an IRA being that its pretax dollars. Once you leave employment you can roll it over to an IRA but it is still pretax dollars you roll over.
Roth IRAs are different, they are after tax dollars so you should specify that the IRA is a Roth IRA and not a traditional IRA which is identical to a 401k basically.
So Roth IRA is not a traditional IRA or a simple IRA.
Anyhow, lots of advantages to a Roth IRA, but virtually no difference between a 401k and a traditional IRA and its usually rolled over to an IRA once you leave employment where you had your 401k or 403b(which is the same as a 401k but tax law codes it slightly different if its offered by a notforprofit entity say for hospital employees)
So really, not much difference FG, unless you invest later in a Roth with aftertax dollars allowing no taxation on the amount.
Pretax dollars allow you to put more in obviously and lower your taxable income which can be VERY important if you can put yourself in a lower tax bracket by doing so. Thats a key advantage. They take the money out on a pretax basis then you are also in a lower tax bracket and you usually get some matching by the employer too which is like an automatic raise.
All of this stuff though is easily done with a sound financial plan to prevent mistakes that can cost you money.
They are all retirement plans and some offer better solutions depending on the individual and their goals. Even insurance plans like variable universal given you have a family can work to help build things and have more flexibility given how situations change.
Got to put it all together to have it sound