Required Minimum Distributions (RMDs): What You Must Know (2026)

The IRS collected over $185 million in RMD penalties last year from retirees who either forgot, miscalculated, or misunderstood a rule that now governs every tax-deferred retirement account in America. Required Minimum Distributions are not optional suggestions — they are legally mandated withdrawals that begin at age 73 under the SECURE 2.0 Act, and missing them triggers an excise tax of 25% on the shortfall. A single $50,000 missed RMD costs you $12,500 in penalties before ordinary income tax applies. The SECURE 2.0 Act reduced that penalty from 50%, but the arithmetic is still punishing. Understanding RMDs is not about compliance theater — it is about controlling taxable income across decades, protecting Social Security benefits from higher taxation, and reducing Medicare premium surcharges that compound quietly every year.

What SECURE 2.0 Changed and Why the Timing Matters

The SECURE 2.0 Act of 2022 was the most significant overhaul of retirement distribution rules in two decades. Before 2023, RMDs began at age 72. The new law pushed the starting age to 73 for anyone turning 72 after December 31, 2022, and extends that starting age to 75 beginning in 2033 for anyone turning 74 after December 31, 2032. Roth 401(k) accounts were exempted from lifetime RMDs entirely starting in 2024, aligning them with Roth IRA treatment. The penalty for missed distributions dropped from a 50% excise tax to 25%, and further to 10% if the error is corrected within a two-year window.

These changes are not cosmetic. The one-to-three additional years of tax-deferred growth created by the age shift can add tens of thousands of dollars to account balances before the first mandatory withdrawal. More importantly, that extended window creates a Roth conversion opportunity between retirement age and RMD onset that most retirees leave entirely unexploited.

The Calculation Formula Every Account Holder Must Know

RMD calculations use a straightforward formula: divide your prior December 31 account balance by the IRS life expectancy factor from the Uniform Lifetime Table for your age. The result is the minimum you must withdraw from each account category during that calendar year.

The RMD formula: Prior year-end account balance ÷ IRS life expectancy factor = RMD

For a 73-year-old with $600,000 in a traditional IRA, the life expectancy factor from the IRS Uniform Lifetime Table is 26.5. That produces an RMD of $22,642. At age 80, the same account at $700,000 would use a factor of 20.2, yielding a $34,653 RMD. By age 90, the factor drops to 12.2, and a $500,000 balance generates a $40,984 RMD — 8.2% of the account in a single year.

The calculation rules differ by account type, and conflating them is one of the most common mistakes made:

• Traditional IRAs, SEP IRAs, SIMPLE IRAs: Calculate each account's RMD separately, but you may satisfy the combined total from any single IRA or any combination across accounts
• 401(k)s and 403(b)s from current or former employers: Each plan requires its own separate distribution — aggregation is not permitted
• 403(b)s: May be aggregated with each other starting in 2024, but not with IRAs

The 25% Penalty Mechanism and How to Escape It

Missing an RMD triggers an excise tax of 25% on the amount that should have been distributed but was not. That excise tax is assessed in addition to the ordinary income tax owed when you eventually do withdraw the shortfall. At a 22% marginal rate, a $15,000 RMD shortfall generates $3,750 in excise tax plus $3,300 in income tax — $7,050 in total cost on $15,000 of income you did not even receive yet.

The correction window matters. SECURE 2.0 introduced a reduced 10% penalty for shortfalls corrected within two years of the original deadline. To qualify, you must withdraw the missed amount, file IRS Form 5329 to report the error, and may request a formal penalty abatement. The IRS has historically granted first-time abatements for taxpayers with a clean compliance history who correct errors promptly.

Critical deadline rules:

• Standard RMD deadline: December 31 of the distribution year, every year
• First RMD only: May be delayed to April 1 of the year following the year you turn 73
• First-RMD delay trap: Delaying creates two RMDs in one calendar year, which can push taxable income significantly higher and trigger Medicare IRMAA surcharges

Qualified Charitable Distributions: The Most Overlooked RMD Strategy

Qualified Charitable Distributions allow IRA owners age 70½ or older to transfer up to $105,000 directly from an IRA to a qualified charity each year. The QCD counts toward the annual RMD requirement but is excluded entirely from adjusted gross income. This distinction is more valuable than a standard charitable deduction — a deduction reduces taxable income only if you itemize, while a QCD prevents the income from appearing in AGI at all.

The AGI exclusion has cascading benefits that extend well beyond the direct tax savings:

• Medicare IRMAA: Keeping MAGI below the $106,000 single / $212,000 married thresholds avoids $69.90–$419.30 per month in Medicare Part B premium surcharges
• Social Security taxation: Lower AGI keeps provisional income below the thresholds where 50% and 85% of Social Security becomes taxable
• Net Investment Income Tax: Staying below $200,000 single / $250,000 married avoids the 3.8% NIIT on investment income

A retiree with a $45,000 RMD who donates $15,000 annually to charity has a straightforward choice: take the full $45,000 as taxable income and then write a personal check to charity (requiring itemization to benefit), or direct $15,000 as a QCD (reducing taxable RMD income to $30,000 regardless of filing status). For a retiree in the 22% bracket near an IRMAA threshold, that $15,000 AGI reduction can be worth $4,000–$7,000 in combined tax and premium savings annually.

Inherited IRA Rules After SECURE Act: The 10-Year Clock

The SECURE Act of 2019 fundamentally changed how inherited IRAs are managed for most beneficiaries. The classic "stretch IRA" strategy — where non-spouse beneficiaries could take distributions over their own lifetime — is largely gone. Most non-spouse beneficiaries who inherit an IRA after December 31, 2019 must empty the account by December 31 of the tenth year following the original owner's death.

Eligible designated beneficiaries who retain stretch IRA treatment include:

• Surviving spouses
• Minor children of the deceased account owner (until the age of majority, at which point the 10-year clock begins)
• Disabled or chronically ill individuals
• Individuals not more than 10 years younger than the deceased

For everyone else — adult children, siblings, most trusts — the 10-year rule applies. The IRS clarified in proposed regulations that for beneficiaries who inherit from owners who had already begun taking RMDs, annual distributions are required during the 10-year period, not just a lump sum in year 10. This distinction matters: an adult child inheriting a $500,000 IRA from a 78-year-old parent may need to take annual distributions for 10 years, potentially stacking with their own peak earning years and pushing them into the 32% or 37% bracket.

Advanced RMD Strategy: The Roth Conversion Window

The period between retirement and age 73 is the most tax-efficient planning window most retirees have. Income is typically lower than peak earning years, Social Security has not yet begun or is at minimum, and RMDs have not started. This convergence creates an opportunity to convert traditional IRA assets to Roth IRA at lower marginal rates — permanently reducing the future RMD base and shifting assets into a tax-free growth vehicle with no lifetime RMD requirements.

The compounding effect of early conversion:

A retiree who retires at 65 with $1.4 million in a traditional IRA and converts $80,000 per year for eight years (ages 65–72) will reduce their traditional IRA balance by approximately $640,000 in conversion basis. Assuming 6% annual growth, the age-73 balance on the remaining traditional IRA is approximately $900,000 — compared to $2.23 million without conversions. The RMD at 73 on $900,000 is $33,962. The RMD on $2.23 million is $84,150. That $50,188 annual difference in forced taxable income, compounded across 20 years of retirement, represents $480,000 in additional taxable distributions plus the associated Medicare surcharges and Social Security taxation impacts.

Multi-account aggregation strategy:

When taking RMDs across multiple IRAs, the distribution does not need to come proportionally from each account. Calculate each IRA's required minimum separately, then satisfy the combined IRA total from whichever account makes the most sense:

• Take from the account with the lowest growth prospects first
• Distribute from the account with the least favorable asset mix
• Let high-conviction positions continue to compound in accounts not tapped for RMD

For 401(k) accounts from prior employers, each plan requires its own separate distribution. One strategy is to roll old 401(k) accounts into a current employer's plan (if the plan accepts rollovers and the employer allows continued work past 73 without RMDs) or into a traditional IRA to simplify aggregation.

Common Mistakes That Trigger Penalties and Higher Lifetime Taxes

Forgetting old employer 401(k) accounts: Every 401(k) from a prior employer requires a separate RMD calculation and distribution. A retiree with a $200,000 rollover IRA and two old 401(k)s totaling $350,000 cannot satisfy all obligations by withdrawing from just the IRA. The 401(k)s require independent distributions.

Missing the December 31 deadline: The December 31 deadline is not a target — it is a hard cutoff. Financial institutions process hundreds of thousands of year-end distributions in December. Requests submitted after December 20 may not process before December 31 due to settlement delays. Standard industry guidance is to initiate year-end distributions no later than December 15.

Assuming custodians calculate accurately: Custodians often estimate RMDs based on the information they have, which may exclude other IRAs you hold at other institutions, outdated beneficiary designations, or inherited IRA accounts. The final responsibility for accurate calculation falls on the taxpayer, not the institution.

Ignoring beneficiary designations: Outdated beneficiary designations — naming a deceased spouse, an ex-partner, or bypassing a trust designed for asset protection — can override an estate plan entirely and create inherited IRA distributions that trigger the 10-year rule for beneficiaries who were intended to receive stretch treatment.

This article is for educational purposes only and does not constitute personalized financial advice. Consult a licensed CFP® or CPA for guidance specific to your situation.