Roth 401k or 401k?

I was contributing to the 401k (pretax) then switched to Roth 401k (after tax). Which should I be using? Both have $19,500 contribution limit I believe, does the Roth 401k grow tax free like a Roth IRA? Thanks!

I would be curious to know the answer to this as well. I have the option of investing in a 403(b) and/or a Roth 403(b). Should I consider both?

If your company matches then I would definitely contribute to the Trad 401k up to get the full employers match then max out the Roth 401k.

Roth 401k’s earnings are tax free, just like Roth IRA. The only difference between the 2 is Roth 401k is subject to Required Minimum Distribution at age 72, while Roth IRA is not.

Contributing 401k or Roth 401k is fine. Contributions under 401k + Roth 401k have to be less than or equal to $19,500 for 2021 (so you can’t contribute$19,500 in 401k and another $19500 in Roth 401k). If you’re financially able, Roth 401k is better long term. But I would suggest maxing out employer match using whichever method first (401k or Roth 401k), then max out your Roth IRA, then if you have money left that’s when you would max out the $19,500 allowable in your 401k (again pretax or Roth is fine, depending on your financial ability). Or you can also do 5% to as regular 401k and 5% as Roth 401k - I bet your plan administrator allows you to split up the type of contribution, it does not need to be either or.