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Tax-Efficient Withdrawal Order

Managing RMDs and Taxes: Required Minimum Distributions Explained

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How Do Required Minimum Distributions Affect Your Retirement Taxes?

At age 73, the IRS takes control of your retirement withdrawals. Required Minimum Distributions (RMDs) mandate that you withdraw at least a specified percentage of your retirement accounts each year. If you do not take the full RMD, the IRS assesses a penalty equal to 25% of the shortfall (as of mid-2020s; this was reduced from 50% in recent tax law changes). RMDs are taxable as ordinary income, subject to your marginal tax bracket, and they interact with Social Security taxation, Medicare premiums, and other thresholds. Understanding RMDs is essential for managing taxes in your 70s, 80s, and beyond.

Quick definition: A Required Minimum Distribution (RMD) is the minimum amount the IRS requires you to withdraw from tax-deferred retirement accounts (traditional IRA, 401(k), 403(b), and most other plans) starting at age 73, calculated as account balance divided by a life-expectancy factor.

Key takeaways​

  • RMDs apply to traditional IRAs, SEP-IRAs, SIMPLE IRAs, 401(k)s, 403(b)s, and other tax-deferred plans (not Roth IRAs or Roth 401(k)s)
  • The RMD is calculated annually: prior year-end account balance divided by a life-expectancy factor from IRS Uniform Lifetime Table
  • First RMD is due by April 1 of the year after you turn 73; subsequent RMDs are due by December 31 each year
  • Failing to take a full RMD triggers a 25% penalty on the shortfall (recent change from 50%)
  • RMD income raises your tax bracket, increases Social Security taxation, and triggers Medicare IRMAA premiums

Understanding the RMD Calculation​

The IRS publishes three life-expectancy tables. The vast majority of retirees use the Uniform Lifetime Table, which assumes a joint-life expectancy. Here is how it works:

  1. Determine your account balance as of December 31 of the prior year
  2. Find your age in the Uniform Lifetime Table
  3. Locate the divisor (life-expectancy factor) at your age
  4. Divide balance by divisor to get your RMD for the current year

Example: A 75-year-old has a traditional IRA balance of $500,000 as of December 31 of the prior year. The Uniform Lifetime Table shows a divisor of 22.9 at age 75. The RMD is $500,000 / 22.9 = $21,834. This must be withdrawn by December 31 of the current year.

The divisor decreases with age (shorter remaining lifespan), so the RMD percentage increases. At age 73, the divisor is roughly 26.5; at age 85, it is 14.8; at age 95, it is 7.6. As you age, RMDs become larger as a percentage of your balance.

Married Couples and the Spouse-Beneficiary Exception​

If your spouse is your sole beneficiary and is more than 10 years younger than you, you may use the Joint and Last Survivor Table, which has a higher divisor, resulting in smaller RMDs. This exception is rare and requires specific documentation, but it can be valuable for a couple with a significant age gap.

Most married couples with similar ages use the Uniform Lifetime Table for both spouses' accounts.

RMDs and Income Taxation​

Every dollar of an RMD is ordinary income. If you are in the 22% bracket, an RMD of $50,000 costs you $11,000 in federal income tax. State income tax may add another $2,000–$4,000 depending on your state. Additionally, RMDs interact with Social Security and Medicare in non-obvious ways.

Interaction with Social Security taxation:

Your Combined Income (AGI + non-taxable interest + 50% of Social Security benefits) partly determines how much of your Social Security is taxable. RMDs increase your AGI, which increases your Combined Income, which increases the amount of Social Security subject to taxation. For a married couple with $40,000 in RMD and $48,000 in Social Security ($24,000 + $24,000), their Combined Income is $88,000 (assuming no other income and no non-taxable interest). At this level, up to 85% of their Social Security is subject to tax—a much higher threshold than if RMD were lower.

Interaction with IRMAA (Medicare premiums):

At 65, your Medicare Part B and D premiums are based on your Modified AGI from two years prior. RMDs at age 75 do not affect age-65 premiums, but they do affect future adjustments. Higher income triggers IRMAA surcharges: $100–$300 per month in additional premiums per person. For a couple, that is $2,400–$7,200 per year in extra costs.

Strategies to Manage RMD Tax Impact​

Strategy 1: Pre-RMD Conversions and Bracket Filling​

The most powerful RMD-mitigation strategy is not taking RMDs in isolation, but rather managing your retirement accounts before RMDs begin. From retirement until age 73, you have control over withdrawal size and timing. By bracket filling and converting to Roth in those years, you shrink your RMD-eligible balance.

A $500,000 traditional IRA generates an RMD of roughly $21,834 at age 75. If you had converted $200,000 to Roth between ages 62 and 72, your traditional IRA would be $300,000, and your age-75 RMD would be only $13,100. Over a 20-year retirement, that saved RMD of $8,000/year compounds to massive tax savings.

Strategy 2: Qualified Charitable Distributions (QCDs)​

If you are 70½ or older and charitably inclined, you can direct up to $170,000 per year (as of mid-2020s; adjusted for inflation) directly from your IRA to a qualified charity. This distribution counts toward your RMD but does not increase your AGI or taxable income. For a retiree with a $50,000 RMD and a desire to donate $20,000 to charity, a QCD removes that $20,000 from both the RMD and taxable income—a double benefit.

Example: A 76-year-old with a $300,000 IRA has an RMD of $13,100. She donates $10,000 directly to her alma mater via QCD. She satisfies $10,000 of her RMD requirement and avoids $10,000 in taxable income. Her remaining RMD of $3,100 must come from her account, bringing her total distribution to $13,100.

QCDs are underutilized and can save hundreds per month in taxes for charitable retirees.

Strategy 3: Sequencing Withdrawals Across Account Types​

If you have a traditional IRA, a 401(k), a taxable brokerage account, and a Roth IRA, the order in which you withdraw matters.

Optimal sequencing for most retirees:

  1. Qualified dividends and long-term capital gains from taxable accounts (taxed at lower rates: 0%, 15%, 20%)
  2. Roth withdrawals (tax-free, do not count toward RMD or Social Security taxation)
  3. Traditional IRA/401(k) withdrawals to meet RMD (ordinary income)
  4. Additional taxable account withdrawals if more money is needed

This sequencing keeps your AGI lower (by using taxable and Roth first) while satisfying the IRS's RMD requirement. Many retirees incorrectly deplete taxable accounts first, leaving themselves with only traditional and Roth accounts and no flexibility.

Strategy 4: Aggregation of Multiple IRAs​

If you have multiple traditional IRAs, SEP-IRAs, or SIMPLE IRAs, the RMD is calculated on the combined balance, but you must withdraw from each plan. The IRS allows you to aggregate the RMD calculation and withdraw the full amount from any single IRA. This flexibility can be strategic.

Example: A retiree has three traditional IRAs: $200,000 (Vanguard), $150,000 (Fidelity), and $50,000 (Schwab). The combined RMD is $21,834. Rather than calculating and withdrawing RMD from each account separately (messy), she calculates once on the $400,000 total and takes the entire $21,834 from Vanguard. The other accounts are untouched.

This flexibility allows you to source RMDs from accounts in best position (lowest fees, simplest to liquidate, or from which you wanted to withdraw anyway).

Strategy 5: 401(k) Still-Working Exception (Rule of 55)​

If you retire before age 59½ and have a 401(k) (not an IRA) from your employer, you can withdraw without the 10% early-withdrawal penalty. This is the "Rule of 55" and is valuable for early retirees. However, once you are subject to RMDs at 73, this exception no longer applies.

The takeaway: if you have a 401(k) from a former employer, rolling it to a traditional IRA is often beneficial after you are confident you will not need Rule-of-55 withdrawals.

Real-world examples​

Case 1: The retiree who did not plan ahead. A single man retires at 65 with a $600,000 traditional IRA and $100,000 in a Roth IRA. From 65 to 73, he does no conversions or strategic planning. At 73, his traditional IRA has grown (modestly) to $650,000. His RMD at 73 is $650,000 / 26.5 = $24,528. Combined with Social Security of $2,500/month ($30,000/year), his taxable income is $54,528, putting him firmly in the 22% bracket. He pays roughly $12,000 in federal income tax on the RMD alone. Over the next 20 years of retirement (to age 93), his RMDs grow, and his cumulative tax bill is massive.

Case 2: The retiree who did plan ahead. A single woman retires at 62 with a $600,000 traditional IRA and $100,000 in a Roth IRA. From 62 to 72, she does bracket filling and converts $50,000 per year to Roth (11 conversions, paying roughly $6,000/year in taxes, $66,000 total). By age 73, her traditional IRA is $550,000; her Roth IRA is $550,000. Her RMD at 73 is $550,000 / 26.5 = $20,755. Combined with Social Security of $30,000/year, her taxable income is $50,755, in the 12% bracket. She pays roughly $6,100 in federal income tax on the RMD. She has also avoided roughly 100 basis points of tax on the converted amounts (12% conversion vs. 22% RMD taxation), and she has $550,000 in tax-free Roth growth for life. The gap between the two retirees' lifetime tax bill is over $100,000.

Case 3: The charitable retiree. A married couple, both age 75, have combined traditional IRAs of $800,000 and combined RMD of $30,000. They donate $15,000 annually to their local food bank and enjoy tax deductions. They discover QCDs. Instead of taking $30,000 in taxable RMD and separately donating $15,000 (using a standard deduction that may not itemize), they take a QCD of $15,000 and withdraw the remaining $15,000 RMD as a taxable distribution. The QCD removes $15,000 from taxable income, saving them roughly $3,300 in taxes (at a 22% rate). Over 20 years, QCDs save them $66,000—more than the cost of an expensive vacation.

Common mistakes​

  1. Missing the RMD deadline. The first RMD is due by April 1 of the year after turning 73 (this applies to those who turned 73 after 2022; rules changed). Subsequent RMDs are due by December 31. Missing the deadline triggers a 25% penalty on the shortfall. A retiree who was supposed to take $25,000 and did not faces a $6,250 penalty. Calendaring this deadline is essential.

  2. Forgetting to count all accounts. A retiree has a traditional IRA and a SEP-IRA. The RMD rule requires aggregating the two, but many retirees calculate RMD on only the IRA, missing half the requirement. The 401(k) plans are separate (not aggregated with IRAs), but multiple 401(k)s from different employers must be handled separately or aggregated (varies by plan). Clarity on which accounts are subject to RMD is critical.

  3. Taking too much early in retirement. Some retirees see the 25% RMD penalty and decide to "just take the full amount plus extra early" (e.g., at age 70). The IRS does not credit early RMDs against future years. Each year has its own RMD requirement. Overwithdrewing early does not reduce future RMDs.

  4. Not understanding the IRMAA interaction. A retiree takes an extra-large RMD to pay off debt, not realizing it pushes Modified AGI above IRMAA thresholds, costing $300/month in extra Medicare premiums for the next two years. The "extra" RMD of $50,000 cost $7,200 in future Medicare premiums—a hidden tax.

  5. Ignoring Roth RMD rules. Roth 401(k)s (but not Roth IRAs) are subject to RMD rules. A retiree with a Roth 401(k) must take RMDs starting at 73, even though the account is technically Roth. Many overlook this. The workaround: roll a Roth 401(k) into a Roth IRA, which is not subject to RMDs.

FAQ​

What if I do not need the RMD money—can I avoid taking it?​

No. The IRS requires the RMD regardless of whether you need it. The only exception is for charitable retirees using QCDs. If you do not need the funds, a common strategy is to take the RMD and use it to fund a taxable brokerage account or pay down debt. You must take it.

Can I take my RMD from a different retirement account than where the balance is?​

IRAs can be aggregated (take the full RMD from one of multiple IRAs if you like), but 401(k)s cannot be aggregated with IRAs. Additionally, if you have multiple 401(k)s from different employers, each has its own separate RMD calculation (though some plans allow combined withdrawal). Your plan custodian can clarify, but the short answer is: more flexibility with IRAs, less with 401(k)s.

What if I miss the RMD deadline by one day?​

The deadline is absolute. Missing by one day triggers the 25% penalty on the shortfall. However, the IRS has waived penalties in rare cases (spouse death, medical emergency). You can request a waiver, but do not count on it. Making the deadline is crucial.

Does a required minimum distribution count as "income" for purposes of the MAGI phase-out of Roth contributions?​

You cannot contribute to a Roth IRA directly if your income is above the phase-out (roughly $146,000–$161,000 single, $230,000–$240,000 married). An RMD counts as income for this calculation. If you are subject to RMDs, you likely cannot contribute to a Roth directly anyway (you can do conversions, which have no income limit, but not contributions).

Can I delay a required minimum distribution by rolling assets to another plan?​

Generally no. Once you are subject to RMDs, you must take them. Rolling a traditional IRA to another traditional IRA does not suspend RMDs. However, rolling a 401(k) to a different 401(k) (or back to an employer plan if permitted) can, in rare cases, reset RMD rules for that specific plan. This is an advanced maneuver requiring professional guidance.

What if I inherit a traditional IRA from a non-spouse beneficiary? Are there RMD rules?​

Yes. Non-spouse beneficiaries of traditional IRAs must take Required Minimum Distributions based on their own life expectancy. The rules are complex and depend on whether the original owner had begun RMDs, when they died, and the beneficiary's age. Generally, the non-spouse beneficiary must liquidate the inherited IRA over a 10-year period (as of recent tax law changes). Consult a tax professional on inherited IRA RMDs.

Summary​

Required Minimum Distributions are a hard floor on how much you must withdraw from tax-deferred accounts starting at age 73. Because RMDs are ordinary income, they push you into higher tax brackets, increase Social Security taxation, and trigger Medicare IRMAA surcharges. The best strategy is preventive: minimize your RMD-eligible balance through bracket filling and conversions in your 60s, and then manage RMD taxation through QCDs, strategic sequencing, and account aggregation. For those who did not plan ahead, the penalty for missing an RMD (25% of the shortfall) is severe, making this one of the few retirement rules the IRS strictly enforces.

Next​

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