Under the new tax law, it is now easier to convert your
employer-sponsored retirement plan such as a 401(k), 403(b), or 457 into a Roth
IRA account. This is similar to converting your traditional IRA into a Roth
IRA, but with one very significant difference.
When you convert a traditional IRA into a Roth IRA, you can
change your mind and undo this conversion (also known as a recharacterization)
by October 15 of the following year. This may make sense when the value of the
account has dropped since you did the conversion, because you do not want to
pay tax on a higher value than the account currently has.
When you convert an employer-sponsored retirement plan, you
do not have the option of undoing the conversion by October 15. Once you
convert your employer-sponsored retirement plan into a Roth IRA, it cannot be
undone.
If you decide to convert your entire 401(k) into a Roth IRA,
the entire balance will be taxable in the year of the conversion.