Required Minimum Distributions (RMDs): Everything You Need to Know to Avoid Costly Mistakes
Required Minimum Distributions are mandatory withdrawals that the IRS requires from tax-deferred retirement accounts beginning at a certain age. Understanding RMD rules, timing, and strategies is essential for any retiree with Traditional IRA, 401(k), 403(b), or similar tax-deferred account balances. Getting RMDs wrong can trigger significant penalties; getting them right—through proactive planning—can save thousands in taxes.
Reference: https://www.plootus.com/rmd-calculator
What Are RMDs and Why Do They Exist?
The government's rationale for RMDs is straightforward: tax-deferred retirement accounts receive preferential tax treatment on the assumption that they'll be used for retirement income. Without RMD rules, a wealthy retiree could indefinitely defer taxes on enormous balances, essentially creating a tax-sheltered estate. RMDs force minimum distributions that are taxed as ordinary income, ensuring the government eventually collects tax revenue on these deferred amounts.
When Do RMDs Begin?
The SECURE Act (2019) raised the RMD starting age from 70½ to 72. The SECURE 2.0 Act (2022) further raised it to 73 for those who reached 72 after December 31, 2022. The age is scheduled to rise again to 75 in 2033.
Important: your first RMD can be delayed until April 1 of the year following the year you turn 73. However, delaying the first RMD to April 1 means taking two distributions in the first year (the delayed first-year RMD plus the second-year RMD)—which can significantly increase taxable income and potentially push you into a higher bracket or trigger IRMAA Medicare premium surcharges.
How RMD Amounts Are Calculated
Your annual RMD is calculated by dividing your account balance at December 31 of the prior year by a life expectancy factor from the IRS Uniform Lifetime Table (or the Joint and Last Survivor Table if your sole beneficiary is a spouse more than 10 years younger). The life expectancy factor decreases as you age, resulting in a larger percentage of your balance being required each year.
Example: a 75-year-old with a $500,000 IRA balance and a Uniform Lifetime Table factor of 24.6 has an RMD of $500,000 ÷ 24.6 = approximately $20,325. At 85, with a $300,000 balance and a factor of 16.0, the RMD is approximately $18,750—representing a higher percentage of the balance despite the lower absolute dollar amount.
Which Accounts Are Subject to RMDs?
RMD rules apply to: Traditional IRAs, SEP IRAs, SIMPLE IRAs, 401(k) plans, 403(b) plans, 457(b) plans, and other defined-contribution plans. Importantly:
Roth IRAs are NOT subject to RMDs during the original owner's lifetime—a major advantage for estate planning purposes
Roth 401(k) and Roth 403(b) accounts WERE subject to RMDs prior to 2024; SECURE 2.0 eliminated RMDs from Roth workplace accounts starting in 2024
If you're still working past 73, you can generally delay RMDs from your current employer's 401(k) (but not IRAs or old 401(k)s from previous employers)
The Tax Impact of RMDs
RMDs from tax-deferred accounts are taxed as ordinary income. For retirees with substantial IRA or 401(k) balances, RMDs can push them into higher tax brackets, trigger taxation of a larger portion of Social Security benefits (up to 85%), and cause Medicare IRMAA premium surcharges (which apply based on income from two years prior).
This tax impact grows over time as the required percentage increases with age—creating a scenario where wealthy retirees in their 80s and 90s with large accounts face forced distributions that generate significant tax liability.
Proactive RMD Planning Strategies
Roth Conversions Before RMDs Begin
Converting Traditional IRA funds to Roth IRA between retirement and age 73 reduces the balance subject to RMDs and eliminates RMD obligations on converted amounts. This strategy is most effective in years when taxable income is relatively low—between full retirement and Social Security commencement, for example.
Qualified Charitable Distributions (QCDs)
Retirees aged 70½ or older can make Qualified Charitable Distributions—directly transferring up to $105,000/year (2024 limit, adjusted for inflation) from an IRA to a qualifying charity. QCDs count toward the RMD requirement but are NOT included in adjusted gross income—providing the charitable deduction benefit without itemizing, reducing Medicare IRMAA income, and potentially reducing Social Security taxability.
Managing Distribution Timing
RMDs must be taken by December 31 each year (except the first-year option to delay to April 1). However, you can take distributions at any time during the year and in any amounts above the minimum. Taking distributions earlier in the year allows proceeds to be invested in taxable accounts; waiting until year-end preserves tax-deferred growth longer.
RMD Aggregation Rules
For multiple IRA accounts, total RMDs across all IRAs can be satisfied by taking any combination of distributions from any of the accounts—they can be aggregated for calculation and distribution purposes. For 401(k)s and 403(b)s, each account must satisfy its RMD separately (though 403(b) accounts can be aggregated with other 403(b)s).
Understanding RMDs is not just compliance management—it's a core retirement tax planning opportunity. Proactive planning before RMDs begin can reduce lifetime tax liability significantly, preserve more wealth for beneficiaries, and maintain maximum flexibility throughout retirement.
