Required Minimum Distribution (RMD) Rules 2026 —Complete 401(k) & IRA Guide

What Are Required Minimum Distributions (RMDs)?

A required minimum distribution is the smallest amount the IRS forces you to withdraw from certain retirement accounts each year once you reach a specific age. Congress designed these rules to ensure that tax-deferred savings eventually get taxed —you received a deduction (or tax-free growth) on the way in, so the government wants its share on the way out. Understanding RMD rules 2026 is essential whether you have a 401(k), traditional IRA, 403(b), or other qualified plan, because failing to take enough can trigger steep penalties.

Why the IRS Requires Minimum Distributions

Tax-deferred retirement accounts such as traditional 401(k)s and IRAs let your money grow without annual taxation, which is a powerful incentive to save. However, the IRS does not intend these accounts to become permanent tax shelters or wealth-transfer vehicles that skip income tax entirely. RMDs create a withdrawal schedule that gradually draws down your balance over your expected lifetime, converting deferred dollars into taxable income. Without this rule, a retiree could theoretically leave a multi-million-dollar traditional IRA untouched for decades, paying zero federal income tax on those savings while living off other sources.

Which Accounts Are Subject to RMDs

Most employer-sponsored plans and traditional IRAs require minimum distributions. The list includes:

• Traditional 401(k), 403(b), and 457(b) plans
• Traditional IRAs (including SEP-IRAs and SIMPLE IRAs)
• 401(a) and profit-sharing plans
• Inherited retirement accounts (with separate, often accelerated, timelines)

If you hold balances in multiple account types, you will need to calculate —and in some cases withdraw —RMDs from each one. Our RMD Calculator handles the math for any single account; the sections below explain how aggregation rules work across accounts.

Accounts Exempt from RMDs: Roth IRA & (Now) Roth 401(k)

Roth IRAs have never required the original owner to take RMDs during their lifetime. Because contributions go in after-tax and qualified distributions come out tax-free, the IRS allows the balance to grow indefinitely for the account holder. Roth 401(k) accounts previously required RMDs just like their pre-tax counterparts, forcing participants to either withdraw or roll over to a Roth IRA. SECURE 2.0 eliminated this requirement: starting in 2024, designated Roth accounts in employer plans are also exempt from lifetime RMDs. This is a major simplification —you no longer need a rollover just to avoid Roth 401(k) distributions. For a deeper comparison of Roth and pre-tax strategies, see our 401(k) vs Roth IRA guide.

When Do RMDs Start? —SECURE 2.0 Age Changes

The age at which RMDs kick in has shifted multiple times over the past decade. The original SECURE Act (2019) raised the starting age from 70½ to 72. Then SECURE 2.0 (2022) pushed it further. Knowing your specific "Required Beginning Date" is the first step to complying with 401k RMD rules.

Age 73 Starting Age (2023—032)

If you turn 73 between January 1, 2023, and December 31, 2032, your RMDs begin at age 73. This applies regardless of whether you have a traditional IRA, 401(k), or both. For 2026, this means anyone born in 1953 who has already turned 73, or anyone born in 1954 turning 73 this year (technically turning 72 in 2026 if born in 1953 —check your exact birth year), should confirm their required beginning date. The safest approach: if you are 73 or older and have not started distributions from your traditional accounts, take action now.

Age 75 Starting Age (2033 and Later)

Beginning in 2033, the RMD starting age increases to 75. If you were born in 1960 or later, you will not need to take your first RMD until the year you turn 75. This two-year extension gives those savers additional time for tax-deferred growth and more flexibility to execute Roth conversion strategies before distributions become mandatory.

First-Year RMD Timing: April 1 Deadline and Double-Distribution Year

Your very first RMD can be delayed until April 1 of the year following the year you reach RMD age. This is called your "Required Beginning Date." While delaying sounds attractive, it creates a trap: you would need to take two RMDs in the same calendar year —the delayed first-year RMD plus the current-year RMD by December 31. Two distributions in one year can push you into a higher tax bracket, increase Medicare Part B and D premiums (IRMAA surcharges), and potentially make more of your Social Security benefits taxable. For most people, taking the first RMD in the year you actually turn 73 (or 75) is the better move.

Still Working Exception for 401(k) Plans

If you are still employed and do not own more than 5% of the company sponsoring the plan, you may delay 401(k) RMDs from that specific employer's plan until the year you actually retire. This exception does not apply to IRAs —IRA RMDs are based purely on age, regardless of employment status. It also does not cover plans from previous employers. If you have old 401(k) balances sitting at former jobs, those accounts are subject to the standard age-based timeline. One practical strategy: if your current plan accepts rollovers, consolidate old 401(k) balances into your current employer's plan to take advantage of the still-working exception on the full amount.

How to Calculate Your RMD —Step by Step

Calculating your required minimum distribution is straightforward once you know the two inputs: your prior-year-end account balance and the correct IRS life expectancy factor. Here is the three-step process. You can also skip the manual work and use our RMD Calculator to get your number instantly.

Step 1: Find Your Prior-Year December 31 Account Balance

Your RMD for any given year is based on the fair market value of the account on December 31 of the previous year. For 2026 RMDs, that means your balance as of December 31, 2025. Your plan custodian or IRA provider typically reports this on Form 5498 or your year-end statement. If you have multiple IRAs, you need each account's year-end balance (even though you can aggregate the withdrawal).

Step 2: Look Up Your Life Expectancy Factor (Uniform Lifetime Table)

Most people use the IRS Uniform Lifetime Table, which assumes a beneficiary exactly 10 years younger than you. If your sole beneficiary is a spouse who is more than 10 years younger, you may use the Joint and Last Survivor Table instead, resulting in a smaller RMD. The table below shows the most commonly referenced ages:

Source: IRS Publication 590-B, Uniform Lifetime Table (updated 2022, applicable for 2026). For the full table covering all ages, see IRS.gov.

Step 3: Divide Balance by Factor —That Is Your RMD

The formula is simple: RMD = Prior-year December 31 balance ÷ Life expectancy factor. For example, if your traditional IRA balance was $500,000 on December 31, 2025, and you turn 75 in 2026, your factor is 24.6:

You can always withdraw more than the minimum. However, the excess does not carry forward to reduce a future year's RMD. Each year's calculation resets based on the new December 31 balance and your updated age factor. If you would like to see exactly how your balance, age, and taxes interact over multiple years, try our RMD Calculator.

401(k) vs IRA RMD Rules —Key Differences

While the basic RMD formula is the same, 401k RMD rules and IRA RMD rules diverge in several important ways. These differences affect timing, flexibility, and tax planning. The comparison table below summarizes the key distinctions.

Still-Working Exception: 401(k) Has It, IRA Does Not

This is arguably the most impactful distinction. A 74-year-old employee with a $1 million balance in their current employer's 401(k) may owe zero RMD if they still work there and own 5% or less. The same person's $200,000 traditional IRA would require a full RMD based on age. Planning around this exception —including consolidating old 401(k)s into the current plan —can defer significant taxable income.

Aggregation Rules: IRAs Can Be Combined, 401(k)s Cannot

If you own three traditional IRAs, the IRS lets you calculate each account's RMD separately but take the total from whichever IRA or combination you choose. This flexibility is useful when one IRA holds appreciated stock you want to keep and another holds bonds you are comfortable liquidating. 401(k) plans do not allow this: each plan's RMD must come from that specific plan. If you have two old 401(k)s, you cannot satisfy both RMDs by withdrawing from just one.

Roth 401(k) vs Roth IRA: Different RMD Treatment Before SECURE 2.0

Before 2024, Roth 401(k) balances were subject to RMDs even though Roth IRA balances were not. This led many advisors to recommend rolling Roth 401(k) money into a Roth IRA immediately upon separation from service. SECURE 2.0 fixed this asymmetry: starting in 2024, Roth 401(k) accounts are exempt from lifetime RMDs, matching the Roth IRA treatment. If you already rolled over, no harm done —but if you prefer the creditor protections of an ERISA-covered 401(k), you can now keep Roth dollars in the plan without RMD consequences.

Penalties for Missing an RMD —And How to Fix It

Missing an RMD used to be one of the most punitive errors in the tax code. SECURE 2.0 softened the blow, but the penalties remain serious enough to demand attention.

25% Excise Tax on the Shortfall (Down from 50%)

Before SECURE 2.0, the penalty for not taking enough was a crushing 50% excise tax on the amount you should have withdrawn but did not. Starting in 2023, that rate dropped to 25%. The shortfall is the difference between the RMD amount and what you actually withdrew (if anything). For example, if your RMD was $20,000 and you only took $5,000, the shortfall is $15,000 and the penalty would be $3,750 (25% of $15,000). You still owe regular income tax on the distribution itself —the excise tax is on top.

10% Reduced Penalty If Corrected Within 2 Years

SECURE 2.0 added a further incentive to fix mistakes quickly. If you take the missed RMD and file a corrected tax return within the "correction window" (generally within two tax years), the excise tax drops to just 10%. In the example above, that would reduce your penalty from $3,750 to $1,500. Act fast: the two-year clock starts ticking from the year the RMD was originally due.

How to Request a Penalty Waiver From the IRS

Even with the reduced rates, you can request a full waiver of the excise tax by demonstrating "reasonable cause" on IRS Form 5329. Common reasonable-cause arguments include serious illness, a custodian error (the institution failed to process your distribution), or confusion caused by multiple accounts. Attach a letter explaining what happened, what you have done to correct it (take the missing distribution), and how you will prevent recurrence. The IRS grants waivers regularly when the shortfall has been corrected and the request is reasonable.

How Can You Minimize Taxes on Your RMDs?

RMDs are taxed as ordinary income, which can push retirees into higher brackets, trigger Medicare IRMAA surcharges, and make Social Security benefits more taxable. Proactive planning can reduce the lifetime tax impact of 401k and IRA required minimum distribution rules.

Qualified Charitable Distributions (QCDs) —Donate Up to $105,000 Tax-Free

If you are age 70½ or older and make charitable gifts, a Qualified Charitable Distribution lets you transfer money directly from your IRA to a qualifying charity. The distribution counts toward your RMD but is excluded from taxable income —a much better deal than taking the RMD, paying tax, and then donating. For 2026, the annual QCD limit is $105,000 per person (indexed for inflation under SECURE 2.0). QCDs must come from an IRA —they are not available directly from 401(k) plans —so you may want to roll employer plan balances into an IRA before RMD age if QCDs are part of your strategy.

Roth Conversions Before RMD Age

Converting traditional 401(k) or IRA balances to a Roth account triggers immediate income tax on the converted amount, but it removes those dollars from future RMD calculations and allows tax-free growth going forward. The "Roth conversion bridge" strategy is especially powerful in the years between retirement and RMD age, when your taxable income may be lower. By systematically converting during low-income years, you shrink the pre-tax pool that will generate RMDs later. Use our 401(k) calculator and 401(k) vs Roth IRA guide to model how conversions affect your long-term balance and tax liability.

Coordinating RMDs Across Multiple Accounts

If you have both a 401(k) and multiple IRAs, remember the aggregation rules: IRA RMDs can be combined and taken from any IRA, but 401(k) RMDs must come from each plan individually. Strategically choosing which IRA to tap —perhaps one with lower-performing assets or one that simplifies your portfolio —can improve overall investment efficiency. Also consider the sequence: taking RMDs from accounts with the highest tax drag first can leave more growth potential in Roth and tax-efficient accounts. Our balance by age benchmarks can help you see where you stand relative to peers at each stage.

SECURE 2.0 RMD Age Timeline: When Does Your First RMD Hit?

SECURE 1.0 (2019) and SECURE 2.0 (2022) collectively pushed the RMD starting age back from 70½ to 73 and eventually 75 — but the rules apply differently depending on your year of birth. Our editorial team built the table below to give you a single-source-of-truth lookup for when your first RMD is required, no matter your birth year.

What this tells you: If you were born in 1960, you have 9 extra years of tax-deferred growth compared to someone born in 1948 — but you also have 9 extra years of compounding pre-tax balance, which means a much larger eventual RMD machine. Most retirees focus on "when do I have to start" and miss the more important question: "how big will my RMD be when it does start?" The 1960+ cohort especially should be aggressive with Roth conversions in their late 60s and early 70s, because their pre-tax balance has had more time to grow before the RMD starts shrinking it.

Source: Internal Revenue Code §401(a)(9) as amended by the SECURE Act of 2019 (Public Law 116-94) and the SECURE 2.0 Act of 2022 (Division T of Public Law 117-328). Special "still working" exception under IRC §401(a)(9)(C) allows current-employer 401(k) RMD deferral for non-5%-owners.

What Are the Real Costs of Missing an RMD? (4-Path Recovery Comparison)

SECURE 2.0 reduced the missed-RMD penalty from 50% to 25%, with a further reduction to 10% if you correct quickly. But the IRS does not publish a clean "decision tree" for what happens when you miss one — so our editorial team built one based on Form 5329 instructions and IRS Notice 2023-54. Here are the four real recovery paths from worst to best.

What this tells you: The IRS routinely waives the missed-RMD penalty for genuine "reasonable cause" (illness, mental incapacity, plan administrator error, recent retirement transition) if you act quickly and document the correction. Path 4 (waiver) is realistically achievable for most first-time misses caught within months. The $4,000-$10,000 penalty in Paths 2-3 is the real cost of waiting more than a year to discover the miss. Set a December 1 calendar reminder — the cost of forgetting is asymmetric.

Source: IRC §4974, IRS Form 5329 instructions (2026 revision), IRS Notice 2023-54 covering SECURE 2.0 transition rules. The waiver request is filed by writing "RC" (Reasonable Cause) next to the line on Form 5329 and attaching a brief explanation letter. Best401kCalculator.com Editorial Team analysis, May 2026 — not a substitute for advice from a qualified tax professional on a specific situation.

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