Can I use an in-service distribution from my 401(k) to satisfy an RMD?

Yes. If your 401(k) plan allows in-service distributions (available at certain ages, typically 59½ or older), you can take the RMD amount as an in-service distribution. Some plans also allow in-service rollovers to IRAs — but remember, the RMD must be taken before any rollover; the RMD amount itself cannot be rolled over.

Do 403(b) plans follow the same rules as 401(k)s?

403(b) plans are similar to 401(k)s for RMD purposes. There is one key difference: 403(b) accounts can be aggregated with each other (similar to IRAs) for RMD purposes — calculate each 403(b) RMD and take the total from any 403(b). This contrasts with 401(k)s, which cannot be aggregated across plans. Governmental 457(b) plans follow 401(k) aggregation rules — each plan separately.

What about SIMPLE IRAs and SEP IRAs?

SIMPLE IRAs and SEP IRAs follow IRA rules — they can be aggregated with traditional IRAs for RMD purposes. Calculate the RMD for each separately but take the combined total from any of your traditional, SEP, or SIMPLE IRA accounts. They do not have the still-working exception.

Guide

401(k) vs IRA RMD Rules — Key Differences Explained

What are the key differences between 401(k) and IRA RMD rules?

Both traditional IRAs and 401(k) plans use the same formula to calculate RMDs — prior December 31 balance divided by the IRS Uniform Lifetime Table factor. However, several important rules differ: aggregation, the still-working exception, in-plan flexibility, and QDRO considerations.

Understanding these differences helps you decide whether to consolidate accounts, roll 401(k)s to IRAs, or maintain separate accounts for strategic reasons.

Key RMD Rules

1Formula: same for both — RMD = December 31 balance ÷ IRS life expectancy factor.
2Aggregation: IRA RMDs can be combined and taken from any IRA. Each 401(k) must satisfy its own RMD separately.
3Still-working exception: applies to current employer's 401(k) (not IRAs) if you are not a 5% owner.
4401(k) plans may offer installment payments, annuity options, or in-kind distributions that IRAs may not.
5IRAs: more custodian flexibility, more investment options, easier aggregation.
6401(k) plans: may offer loan provisions, QDRO splitting for divorce, and creditor protection (ERISA) not available in IRAs.

When to Keep Your 401(k) Instead of Rolling to an IRA

Reasons to keep a 401(k) rather than rolling to an IRA: (1) Still-working exception — delay RMDs if still employed after 73 and not a 5% owner; (2) ERISA creditor protection — 401(k)s are fully protected from creditors under ERISA; IRA protection varies by state; (3) Age 55 rule — if you separate from service at 55 or older, 401(k) withdrawals avoid the 10% early penalty; IRAs require age 59½; (4) Company stock NUA opportunity — possible tax benefit for appreciated employer stock in a 401(k).

When to Roll Your 401(k) to an IRA

Reasons to roll 401(k) to an IRA: (1) More investment choices — most 401(k)s offer limited fund menus; IRAs allow individual stocks, ETFs, bonds, REITs; (2) IRA aggregation — simplify RMDs by combining into fewer accounts; (3) QCD eligibility — QCDs can only be made from IRAs, not 401(k)s; (4) Lower fees — IRAs often offer lower-expense-ratio options than employer plans; (5) Estate planning flexibility — IRAs often offer more beneficiary designation options.

Common RMD Mistakes to Avoid

⚠Using an IRA distribution to satisfy a 401(k) RMD — these are separate accounts with no cross-aggregation.
⚠Rolling a 401(k) to an IRA while still working after 73 — this eliminates the still-working exception and triggers immediate IRA RMDs.
⚠Assuming all 401(k) plans use December 31 as the valuation date — some plans use different valuation methods; check plan documents.

Related RMD Tools & Guides

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Frequently Asked Questions

Disclaimer: This content is for informational purposes only and does not constitute tax or financial advice. RMD rules are based on IRS Publication 590-B and SECURE 2.0 Act provisions. Always consult a qualified tax professional or financial advisor for guidance specific to your situation. IRS rules may change; verify current requirements at irs.gov.

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