A retiree juggling three or four individual retirement accounts often assumes each one demands its own required withdrawal every year, drawn separately and on its own. The tax code says otherwise for IRAs. Once the required amount for each account is calculated, an owner can add the figures together and pull the entire total from just one IRA, leaving the others untouched. It is a small piece of flexibility with real consequences, and it comes with a hard boundary that trips up the people who assume it applies to every retirement account they hold.
How the totaling rule actually works
Required minimum distributions are the amounts the government forces savers to withdraw from tax-deferred accounts once they reach the mandatory age, ensuring the deferred taxes eventually get paid. Each IRA’s required amount is still figured individually, based on that account’s year-end balance and the owner’s life expectancy. The flexibility comes at the next step.
Under the IRS rules for IRA distributions, an owner sums the separately calculated amounts and may satisfy the entire obligation from a single IRA, or split it across any combination of them. The government cares only that the correct total leaves the IRA system by the deadline, not which specific account it comes out of. For someone with several IRAs, that means the whole year’s requirement can be met with one withdrawal from one account.
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The line that separates IRAs from workplace plans
The rule ends at the edge of the IRA world, and this is where costly mistakes happen. Employer plans such as 401(k)s do not share in the aggregation. A required distribution from a 401(k) must come out of that specific plan, and if a person holds two 401(k)s from two former employers, each one demands its own separate withdrawal. There is no combining a 401(k)’s requirement with an IRA’s, or with another 401(k)’s.
The distinction the IRS draws is between account types, not between institutions. All traditional IRAs, including SEP and SIMPLE IRAs used by the self-employed and small businesses, fall into the pool that can be totaled and satisfied from one account. Workplace plans stand outside it. A retiree who moves an old 401(k) into an IRA through a rollover brings that money into the aggregation pool, which is one reason consolidating scattered workplace accounts can simplify the yearly chore.
Getting the boundary wrong carries a penalty. Failing to withdraw a required amount on time triggers an excise tax on the shortfall, a charge Congress reduced in recent years but did not eliminate. A saver who correctly totals their IRAs but forgets that a separate 401(k) still owes its own distribution can end up short without realizing it, which is exactly the trap the aggregation rule’s popularity tends to obscure.
The size of that penalty is worth pinning down, because recent law softened it without removing the sting. A 2022 overhaul cut the excise tax on a missed distribution from 50 percent of the shortfall to 25 percent, and to 10 percent if the saver withdraws the missed amount and files the correction within a two-year window. On a $4,000 shortfall, that is the difference between a $1,000 charge and a $400 one for someone who catches the error quickly. The lesson cuts the same way as the aggregation rule: the arithmetic is forgiving only for the retiree who tracks every account, because a forgotten 401(k) can trigger the tax even when every IRA was handled perfectly.
Why the flexibility is worth using on purpose
Treating the totaling rule as a planning tool rather than a technicality is where the value shows up. Because the total can come from any single IRA, an owner can choose which account to draw down. That opens the door to using the required withdrawal to trim a holding a retiree wants to reduce anyway, or to leave a particular account, perhaps one holding investments expected to grow, fully intact for another year.
The choice can also serve estate and beneficiary planning. An owner might pull the entire required amount from an IRA earmarked for a purpose that no longer fits, gradually emptying it, while preserving a different IRA meant for an heir. None of that is possible with 401(k)s, where each plan’s requirement is locked to that plan, so the IRA rule quietly hands savers a lever their workplace accounts never will.
The calculation itself remains unforgiving on the details, and the annual figures depend on tables published in the IRS guidance for distributions. Running each IRA’s number correctly still matters, because the aggregation applies only after every account’s share is figured; the shortcut is in where the money leaves from, not in skipping the math.
For a retiree with a drawer full of statements, the practical lesson is to sort accounts by type before writing a single check. Total the IRAs and satisfy them however is most convenient; handle each 401(k) on its own. The savers who get burned are rarely the ones who did the arithmetic wrong. They are the ones who assumed a single rule covered every account, when the tax code drew a line straight down the middle.
This article was produced with AI assistance and reviewed by The Money Overview editorial team.
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