Can I rollover money from another plan or IRA into my current 401(k) plan?

  1. Only if the new plan agrees to accept a rollover. Plans are not required to accept them.
  2. You cannot under any circumstances rollover Roth IRA balances into a 401(k) plan.
  3. The IRS does permit you to rollover Roth 401(k) balances from one 401(k) plan to another.