[sickoflibs]

RE :”The return on investment (ROI) from Roth 401(k)’s and Roth IRA’s are tax-free. Your contributions are taxed, but all withdrawals are tax-free — including all earnings.”

I see you made up your own name, They are called 401Ks and Roth IRAs, there is NO Roth 401K. That is a name you made up.

401Ks which they referenced are tax deferred just as I said.
Roth IRAs are savings of already taxed money so obviously you wouldn't pay taxes on it, however you don't have to pay taxes on the gains it gets during savings. But in return the gubment gets the taxes paid now not 30 years in the future as with 401Ks,

[justlurking]

I see you made up your own name, They are called 401Ks and Roth IRAs, there is NO Roth 401K. That is a name you made up.

Do a search on Roth 401k. Or, you can just click this link:

http://en.wikipedia.org/wiki/Roth_401(k)

You really should do a bit of research before you accuse someone of making something up, ***wipe.