How required minimum distributions work
If you’ve spent decades building up your IRA or 401(k), those balances can feel like long-term financial security. But once you reach age 73, the IRS requires you to start taking required minimum distributions, commonly known as RMDs.
RMDs are calculated using your age and your account balance as of December 31 of the prior year. The IRS applies a life expectancy factor to determine how much you must withdraw annually. The larger your balance, the larger the withdrawal, and the higher your taxable income becomes.
For retirees with sizable six- or seven-figure accounts, these forced withdrawals can significantly raise annual tax bills, even if spending needs are modest.
Why RMDs can raise taxes unexpectedly
The challenge with RMDs is that they reverse years of tax deferral all at once. Large withdrawals can push retirees into higher tax brackets, even if their lifestyle has not changed.
Higher taxable income can also trigger secondary costs. Social Security benefits may become more heavily taxed, and Medicare premiums can rise due to income-related monthly adjustment amounts.
Missing an RMD deadline is costly. The IRS can impose a penalty of 25% on the amount that should have been withdrawn. While many custodians now offer automatic RMD tools, automation alone does not solve the underlying tax problem.
The hidden planning window before age 73
There is, however, an often-overlooked opportunity to reduce the long-term impact of RMDs. Retiring in your early to mid-60s and delaying Social Security benefits can create a multi-year window of relatively low taxable income.
For example, someone who retires at 63 and waits until 70 to claim Social Security may have seven years where income is significantly lower than it will be later in retirement. During this period, retirees are often in lower tax brackets.
Using early withdrawals and Roth conversions
During these lower-income years, retirees can take voluntary withdrawals from traditional IRAs or 401(k)s. Doing so gradually reduces future account balances, lowering required minimum distributions later on.
Another strategy is converting a portion of traditional retirement savings into a Roth IRA. While Roth conversions create taxable income upfront, future growth and qualified withdrawals are tax-free. Roth IRAs are also not subject to RMDs during the account owner’s lifetime.
This approach spreads taxes more evenly over time and can provide greater flexibility later in retirement, especially during years with high expenses or market volatility.
Planning ahead makes the difference
RMDs are unavoidable, but their impact is not fixed. The years between retirement and age 73 are often the most powerful planning window to manage future taxes.
By acting early, retirees can smooth taxable income, reduce future surprises, and keep more of their savings working for them throughout retirement.
