Does Splitting a 401(k) Into Multiple Accounts Reduce RMDs?

Three pre-tax containers still hold pre-tax money

Imagine $1 million in one traditional 401(k), or the same $1 million divided among a traditional IRA and two traditional workplace accounts. If balances, growth, owner age, and applicable rules are otherwise the same, creating more account statements does not make the underlying tax-deferred value disappear. A later rollover can simplify administration, but it is not an RMD-reduction strategy by itself.

The RMD calculation generally uses a prior year-end account balance and an IRS life-expectancy factor. At age 73, the Uniform Lifetime Table divisor is 26.5. A $4 million applicable balance divided by 26.5 is about $150,943. Using a different age’s divisor can produce a misleading estimate, so the planner should display both the age and factor.

Planning takeaway

Changing account count is different from changing tax character.

Account type still matters for satisfying requirements

Although account splitting does not inherently shrink the total, account identity matters for compliance. Traditional IRA RMDs are generally calculated for each IRA and may be aggregated for withdrawal from one or more IRAs under applicable rules. Workplace-plan requirements generally must be satisfied separately by plan. Employer-plan and inherited-account rules can differ.

Ownership also matters. Spouses do not combine retirement accounts into one household RMD; each person has individual requirements. A planner that assigns every pre-tax dollar to the primary person can misstate the timing for a younger spouse. Owner-specific birth year, retirement age, and plan type should be stored when the household wants a detailed projection.

Understand the still-working workplace-plan exception

Current rules may allow a participant who is still working to delay RMDs from that current employer’s plan until retirement, if the plan permits and the participant is not a 5% owner. That exception generally does not extend to traditional IRAs or old employer plans merely because the person is working somewhere.

This is one reason to distinguish a workplace plan from an IRA in a retirement model. It is not a reason to assume every worker can delay every RMD. The plan document, ownership status, employment relationship, and current IRS guidance must be checked.

• Store the ownerEach spouse’s age and RMD start can differ.
• Store the account kindTraditional IRA, current workplace plan, old workplace plan, and Roth accounts can follow different rules.
• Show the assumptionIf a still-working delay is modeled, label it clearly and require confirmation.

Focus on real tax diversification

A useful three-tier framework separates pre-tax, Roth, and taxable resources because their tax consequences differ. Qualified Roth distributions generally do not enter federal taxable income. A taxable brokerage withdrawal includes return of basis plus any realized gain rather than treating the full withdrawal as ordinary income. Traditional distributions generally increase ordinary income.

Those distinct tax characters can create options for annual withdrawal sequencing, Roth conversions, gains, QCDs, and large purchases. The proactive question is not how many accounts exist. It is how future income sources interact across brackets, Social Security taxation, Medicare, state taxes, liquidity, and survivor years.