I understand that you can recharacterize Roth IRA contributions back into traditional IRA contributions by the next April 15, if you change your mind and decide it would make sense. Then you won't owe taxes up front on the amount contributed.
Can you do the same with a Roth 401(k) contribution? I contributed a few thousand dollars to my 401(k) as Roth contributions towards the beginning of the year, before changing market conditions made me realize that I was going to be making an utterly ridiculous amount of money from my company stock plan. (I had to realize a lot of the gains all at once, because I didn't feel like carrying a portfolio that was 85% company stock. That's just not safe.) It would probably be of more benefit for me to avoid the taxes now and contribute to a Roth account when my income has returned to normal levels.
p.s. hey, site, the question I'm asking is not subjective and is not likely to be closed. :b