Most retirement planning is done as a couple. Required Minimum Distributions, however, aren’t.
RMD rules apply to individuals, not households. When spouses are different ages, that mismatch can quietly create tax problems, especially if it isn’t addressed until the first RMD actually shows up.
Here’s the common scenario. One spouse reaches RMD age while the other is still working, still below RMD age, or delaying Social Security. The older spouse is required to start taking distributions, even if the household doesn’t need the income yet. Those forced withdrawals stack on top of wages, benefits, or pensions, pushing taxable income higher earlier than expected.
Many couples assume this evens out over time. It often doesn’t.
The larger issue tends to appear later, after the first spouse dies. Filing status shifts from married filing jointly to single. Tax brackets narrow. But the remaining IRA balances, and their required distributions, don’t shrink nearly as much as people expect. In households with age gaps, this can lead to a higher tax rate on the same income, precisely when flexibility is lowest.
The mistake isn’t the age difference. It’s treating retirement income as two parallel plans instead of one coordinated sequence across two lifetimes.
Good planning looks different. It models RMDs at the household level. It stress-tests what happens not just when distributions begin, but when one spouse is gone. It considers which accounts grow, which are drawn down earlier, and how required income fits alongside Social Security, pensions, and other cash flow.
For many couples, the most valuable planning happens before the first RMD, when there’s still room to smooth income, manage future tax brackets, and reduce the risk of a survivor tax shock.
RMDs aren’t just a compliance rule. They’re a timing issue. And timing, especially across two lives, is where thoughtful planning makes the biggest difference.