For example, RMDs can't be rolled over. Neither can hardship withdrawals or certain periodic payments. Do so and you may have an excess contribution to deal with.
3. Use direct rollovers and avoid 60-day rollovers
While it may be tempting to give yourself a free 60-day loan, it's generally a mistake to use 60-day rollovers rather than direct (trustee to trustee) rollovers. If the plan sends the money to you, it's required to withhold 20% of the taxable amount. If you later want to roll the entire amount of the original distribution over to an IRA, you'll need to use other sources to make up the 20% the plan withheld. In addition, there's no need to taunt the rollover gods by risking inadvertent violation of the 60-day limit.
4. Remember the 10% penalty
Taxable distributions you receive from a 401(k) plan before age 59½ are normally subject to a 10% early distribution penalty, but a special rule lets you avoid it if you receive your distribution as a result of leaving your job during after the year you turn age 55. But this special rule doesn't carry over to IRAs. If you roll your distribution over to an IRA, you'll need to wait until age 59½ before you can withdraw those dollars from the IRA without the 10% penalty (unless another exception applies). So if you think you may need to use the funds before age 59½, a rollover to an IRA could be a costly mistake.
5. Learn about net unrealized appreciation (NUA)
If your 401(k) plan distribution includes employer stock that's appreciated over the years, rolling that stock over into an IRA could be a serious mistake. Normally, distributions from 401(k) plans are subject to ordinary income taxes. But a special rule applies when you receive a distribution of employer stock from your plan: You pay ordinary income tax only on the cost of the stock at the time it was purchased for you by the plan. Any appreciation in the stock generally receives more favorable long-term capital gains treatment, regardless of how long you've owned the stock. (Any additional appreciation after the stock is distributed to you is either long-term or short-term capital gains, depending on your holding period.) These special NUA rules don't apply if you roll the stock over to an IRA.
6. And if you're rolling over Roth 401(k) dollars to a Roth IRA ...
If you establish your first Roth IRA to accept a rollover of Roth 401(k) dollars, you'll have to wait five more years until your distribution from the Roth IRA will be qualified and tax-free, regardless of whether or not you've met the five-year requirement in your employer plan. So if you have a Roth 401(k), and you think at some point you might want to roll it into a Roth IRA, you might want to open one now so the clock starts ticking on the five-year requirement as soon as possible (this assumes you don't already have a Roth IRA).
When evaluating whether to initiate a rollover from an employer plan to an IRA always be sure to (1) ask about possible surrender charges that may be imposed by your employer plan, or new surrender charges that your IRA may impose, (2) compare investment fees and expenses charged by your IRA (and investment funds) with those charged by your employer plan (if any), and (3) understand any accumulated rights or guarantees that you may be giving up by transferring funds out of your employer plan.
This information is not intended as tax, legal, investment, or retirement advice or recommendations.