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RMDs and Solo 401(k)s: Three Quirky Rules to Know
Mat Sorensen
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February 27, 2018

Photo of woman shrugging with unsure expression on her face.All retirement account owners must be familiar with the required minimum distribution (“RMD”) rules applicable to their accounts. These rules require you, in most instances, to take partial distributions from your retirement account when you reach age 70 ½. And, surprise, the rules for Traditional IRAs, Roth IRAs, and 401(k)s differ. In fact, even 401(k)s where you are a 5% or greater owner have different rules than 401(k)s where you aren’t an owner. Thanks, Congress.

So what rules apply to Solo 401(k) owners? Well, generally speaking, you must begin taking distributions from your Solo K when you reach age 70 ½. Despite what you may think or presume, there are three quirks to be aware of when it comes to RMD and Solo 401(k):

Still Working Exception Does Not Work on Solo Ks

There is a general RMD 401(k) rule which states that even after age 70 ½, you are not required to take distributions from an employer 401(k) when you are still working for that employer. However, this exception does not apply to account holders or their spouses who own 5% or more of the company. In other words, business owners who use a Solo 401(k) will be forced to take RMD from their Solo 401(k) after age 70 ½ even if they are still working in the business.

Roth 401(k) Funds are Subject to RMD

RMD applies to Roth 401(k)s. I know what you’re thinking, “Wait, but why would RMDs apply to Roth 401(k)s when Roth IRAs are exempt?” Because Congress said so. I know, it doesn’t make much sense, Roth 401(k) distributions at retirement will be tax-free, like Roth IRA distributions, and the IRS will not receive any revenue from the distribution so why treat Roth 401(k)’s differently? There’s not a good answer, but you should write your Congressperson or Senator and ask. In the meantime, if you’re 70 ½ and you have funds in a Roth 401(k) which you don’t want distributed, you can roll those Roth 401(k) funds out to a Roth IRA and you can avoid the distribution requirement by letting those funds sit in your Roth IRA where no RMD is required. Checkmate, IRS.

Every 401(k) Must Have RMD Taken, No Aggregating

Every 401(k) account you have must take RMD. So, for example, if you have a Solo 401(k) and a 401(k) account with an old employer then you need to take RMD from each 401(k) account. You cannot aggregate those accounts together and take RMD out of one to satisfy both RMD requirements. This aggregating is allowed in Traditional IRAs but unfortunately does not work with different 401(k) plan accounts. If taking RMDs from multiple accounts is getting too complex, you can roll the old employer 401(k) to the Solo K or to a Traditional IRA (or Roth IRA if Roth 401(k) funds) to consolidate your accounts and your RMD requirements.

Make sure take RMD when you are required to do so. Failure to take RMD results in a 50% penalty tax on the amount you failed to take. As a result, it’s critical that you understand the RMD rules for each retirement account you hold. If you have made a mistake though, the IRS does have penalty waiver programs whereby you can correct some failed RMDs and request a waiver of the penalty due. This doesn’t work in every instance, but if you’ve failed to take RMD ask your tax lawyer or accountant on whether a penalty waiver could apply in your instance.