Required Minimum Distribution: Rules, Formula, and Traps

Key Takeaways

• RMDs begin at age 73 under SECURE 2.0 and are calculated each year as your prior-December-31 balance divided by an IRS life expectancy factor, for a $800,000 IRA at age 73, that equals about $30,000.
• Roth IRAs are permanently exempt from lifetime RMDs; Roth 401(k) accounts are also exempt starting in 2024 under SECURE 2.0.
• The most common mistake is delaying the first RMD to April 1 of the following year, which doubles up two taxable distributions in the same calendar year and can spike your Medicare premiums.
• Qualified Charitable Distributions (QCDs) of up to $105,000 per year can satisfy your RMD and are excluded from taxable income entirely, making them the most tax-efficient giving strategy for most charitably inclined retirees.

What It Is

Required Minimum Distributions are mandatory annual withdrawals from Traditional IRAs, SEP-IRAs, SIMPLE IRAs, 401(k)s, 403(b)s, and 457(b) plans. The money you pull out is generally taxed as ordinary income in the year you take it.

Under the SECURE 2.0 Act, the RMD age is 73 for people who reach age 72 after December 31, 2022, and rises to 75 for those who reach age 74 after December 31, 2032. Roth IRAs are exempt from lifetime RMDs entirely. As of 2024, Roth 401(k) and other designated Roth accounts are also exempt while the owner is alive.

The Intuition

Tax-deferred accounts let earnings compound without annual tax drag. The IRS is fine with that during your working years, but it is not fine with the deferral lasting forever or passing tax-free to heirs as ordinary retirement money.

The RMD rules force you to start realizing that deferred income at a pace the IRS thinks is reasonable for someone your age. Roth accounts do not have this problem because the tax was already paid up front, so the government has no unpaid bill to collect.

How It Works

The formula

RMD = Prior-year-end account balance / IRS life expectancy factor

The balance is the December 31 value of the account from the previous year. The factor comes from one of three IRS tables in Publication 590-B. Most retirees use the Uniform Lifetime Table (Table III). You look up your age and divide.

First-year timing

You must take your first RMD for the year you reach the required age, but you are allowed to delay that first one until April 1 of the following year. Every RMD after that must be taken by December 31. Waiting on the first one means two RMDs land in the same calendar year, which often pushes taxable income into a higher bracket.

Missed-RMD penalty

The excise tax on a missed RMD was 50%. SECURE 2.0 cut it to 25%, and to 10% if you correct the shortfall within a specified window. Still steep. The fix is simple: take the missed amount and file Form 5329.

Aggregation rules

• Multiple IRAs: calculate the RMD for each, then you can pull the total from any combination of IRAs.
• Multiple 401(k) plans: calculate and take the RMD from each plan separately. No aggregation.

Qualified Charitable Distributions (QCDs)

If you are 70½ or older, you can send up to $105,000 per year (2024 limit, indexed for inflation) directly from your IRA to a qualified charity. A QCD counts toward your RMD and is excluded from taxable income. For charitably-inclined retirees, this is often the most tax-efficient way to give.

Worked Example

Ravi turns 73 on July 15, 2026. His Traditional IRA balance on December 31, 2025, was $800,000.

Looking at the Uniform Lifetime Table, the divisor for age 73 is 26.5.

RMD = $800,000 / 26.5 = $30,189

He can take that $30,189 any time in 2026, or he can defer until April 1, 2027. If he defers, he must also take his 2027 RMD by December 31, 2027, so two distributions hit the same tax year.

If Ravi is already giving $25,000 a year to his church, he could route that gift as a QCD from his IRA. The $25,000 counts toward the $30,189 RMD, and only the remaining $5,189 shows up as taxable income instead of the full $30,189.

Common Mistakes

1. Forgetting the first-year deferral trap. Delaying your first RMD to April 1 of the following year sounds attractive until two RMDs land in the same calendar year and push you into a higher bracket, raise your Medicare premiums, and make more of your Social Security taxable.

2. Aggregating 401(k) RMDs. IRAs can be aggregated; 401(k)s cannot. Retirees with multiple old 401(k) plans sometimes pull the full RMD from one account and discover later that each plan required its own withdrawal.

3. Missing QCD opportunities. Many retirees give to charity from taxable money while their RMD still shows up as fully taxable income. Routing gifts through a QCD simultaneously satisfies the RMD and keeps the amount out of AGI.

4. Ignoring Roth conversions before age 73. The window between retirement and the start of RMDs is often a low-income period. Converting some Traditional dollars to Roth during those years shrinks future RMDs and can save meaningful tax over a full retirement.

5. Assuming the brokerage will handle it automatically. Some custodians offer auto-RMD services, but not all plans do, and the calculation does not always cover every account you hold. You are the one on the hook for the penalty, so verify the number.

Frequently Asked Questions

Q: What is a required minimum distribution in simple terms? An RMD is the IRS-mandated minimum you must pull out of your Traditional IRA or 401(k) each year after age 73. You pay ordinary income tax on the amount you withdraw. The IRS does this to collect taxes that have been deferred since your working years.

Q: How do RMDs affect investment decisions? They force retirees to plan ahead: large Traditional balances generate large RMDs that can push income into higher brackets and increase Medicare premiums. Many advisors recommend Roth conversions before age 73 to shrink future RMDs while bracket space is still available.

Q: What is a real-world example of an RMD calculation? Ravi has an $800,000 Traditional IRA on December 31. At age 73, the Uniform Lifetime Table divisor is 26.5. His RMD is $800,000 divided by 26.5, or $30,189. If he gives $25,000 to charity as a QCD, only $5,189 shows up as taxable income.

Q: How can retirees reduce their RMD burden? Convert some Traditional dollars to Roth before age 73 to reduce the balance subject to RMDs, donate up to $105,000 per year as a QCD to satisfy the RMD without adding taxable income, and avoid delaying the first RMD to April 1 if it would pile two distributions into one high-income year.

Q: How are RMDs different from voluntary withdrawals from a Traditional IRA? Voluntary withdrawals can be taken at any time after age 59½ with no penalty and are taxed as ordinary income. RMDs are mandatory minimum amounts tied to a government formula; failing to take them triggers a 25 percent excise tax on the shortfall, reduced to 10 percent if you correct within the specified window.

Sources

1. Internal Revenue Service. "Publication 590-B, Distributions from Individual Retirement Arrangements (IRAs)." https://www.irs.gov/publications/p590b
2. Internal Revenue Service. "Retirement topics: Required Minimum Distributions (RMDs)." https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-required-minimum-distributions-rmds
3. Internal Revenue Service. "Retirement plan and IRA required minimum distributions FAQs." https://www.irs.gov/retirement-plans/retirement-plan-and-ira-required-minimum-distributions-faqs
4. Internal Revenue Service. "Give more, tax-free: Eligible IRA owners can donate up to $105,000 to charity in 2024." https://www.irs.gov/newsroom/give-more-tax-free-eligible-ira-owners-can-donate-up-to-105000-to-charity-in-2024

Disclaimer

This article is educational content only and is not financial or tax advice. RMD ages, divisors, penalty rates, and charitable distribution limits change over time and depend on your individual circumstances. Consult a licensed tax professional or financial advisor before making retirement distribution decisions.