Federal Required Minimum Distribution (RMD) Calculator

How this calculator works

Section 401(a)(9) of the Internal Revenue Code is the IRS's "you can't defer forever" rule. Traditional retirement money grows tax-deferred — Traditional IRA, 401(k), 403(b), 457(b), Thrift Savings Plan, SIMPLE IRA, SEP-IRA — but once the owner hits the Required Beginning Date, the IRS forces an annual minimum withdrawal computed from a life-expectancy table. This calculator models the Required Beginning Date lookup by birth-year cohort under SECURE Act 1.0 and SECURE Act 2.0, the Uniform Lifetime Table divisor for the standard case, the Joint Life Table approximation for the narrow spouse-10-years-younger case, the § 4974 excise tax on a missed RMD (25% standard, 10% if corrected within the two-year window), the first-year April 1 grace deadline, and the Roth IRA exemption that lets Roth balances skip RMDs entirely during the owner's lifetime.

What an RMD actually is

A Required Minimum Distribution is not a tax — it is a forced withdrawal. The IRS does not take the RMD; the owner takes it, and the distributed amount is included in the owner's gross income at ordinary rates the year it is withdrawn. The forced withdrawal is the IRS's way of unwinding the tax deferral that the owner accumulated during the contribution-and-growth phase: contributions to a Traditional IRA were deducted from income (the front-end deferral), the balance grew without annual taxation on dividends, interest, and gains (the deferral on returns), and the distribution at RMD age is the year the cumulative deferral comes back into income. The RMD mechanic is the throttle that controls the pace of that reversal.

SECURE Act 1.0 and SECURE Act 2.0 — the RBD shifts

The Required Beginning Date used to be a simple age-70½ rule under the pre-SECURE Code. Then Congress moved it twice:

• SECURE Act 1.0 (Pub. L. 116-94, December 2019) raised the RBD from 70½ to 72 for owners not yet at 70½ as of December 31, 2019. Owners already at 70½ at the cutover stayed on the pre-SECURE rule (grandfathered).
• SECURE Act 2.0 (Pub. L. 117-328, December 2022) raised the RBD again on a birth-cohort schedule. Owners born 1951 through 1959 now hit RBD at age 73. Owners born 1960 or later hit RBD at age 75. The cohort design avoids a sharp cliff effect — an owner born December 31, 1959 reaches RBD at 73; an owner born one day later on January 1, 1960 reaches RBD at 75, a two-year deferral.

For 2026, the cohort hitting RBD this year is primarily 1953-born owners (turning 73 in 2026 under the 1951-1959 rule). The 1960-born cohort first reaches RBD in 2035 at age 75. The 1950-and-earlier cohort has already been in RMD-drawing status for years on the original 70½ schedule.

How the Uniform Lifetime Table works

The Uniform Lifetime Table is the IRS's standard life-expectancy table for RMD computations (Treas. Reg. § 1.401(a)(9)-9, Table III). It assumes a hypothetical beneficiary exactly 10 years younger than the owner, which produces a longer distribution period than the owner's actual single-life expectancy would alone — the intended effect is to lower the annual RMD. The table is indexed by the owner's age as of the end of the tax year, and the factor is the divisor:

RMD = (prior year-end balance) / (factor at year-end age)

The factors decline with age, which means the RMD as a percentage of the balance increases with age. At 73, the factor is 26.5 and the RMD is about 3.8% of the prior balance. At 80, the factor is 20.2 and the RMD is about 4.95%. At 90, the factor is 12.2 and the RMD is about 8.2%. At 100, the factor is 6.4 and the RMD is about 15.6%. The 2022 IRS table update lengthened the factors slightly versus the pre-2022 table to reflect improved longevity, producing modestly smaller RMDs at every age.

Worked example 1 — born 1953, $1M IRA, RMD in 2026

An owner born in 1953 reaches age 73 in 2026 and hits RBD under the SECURE 2.0 1951-1959 cohort rule. The owner's Traditional IRA balance on December 31, 2025 was $1,000,000.

• Required Beginning Date age: 73 (SECURE 2.0, 1951-1959 cohort).
• Distribution period factor at age 73: 26.5 (Uniform Lifetime Table).
• RMD for tax year 2026: $1,000,000 / 26.5 = $37,736.
• Deadline (first RMD year): April 1, 2027 (one-time grace under § 401(a)(9)(C)).

If the owner defers the first RMD to April 1, 2027, both the 2026 RMD and the regular 2027 RMD (due December 31, 2027) land in calendar year 2027. On a $1M+ balance, that doubling can move the owner from the 22% bracket to the 32% bracket. Many practitioners advise taking the first RMD in the year of RBD (December 2026 here) to avoid the doubling.

Worked example 2 — born 1955, no RMD in 2026

An owner born in 1955 is age 71 in 2026. Under the SECURE 2.0 1951-1959 cohort rule, the RBD is age 73 — so this owner has not yet reached RBD.

• Required Beginning Date age: 73.
• Current age: 71 — below RBD.
• RMD for tax year 2026: $0.
• First RMD year: 2028 (age 73).

The two-year window before RBD is the highest-leverage planning period for Roth conversions. Converting Traditional IRA balances to Roth before RBD reduces the future RMD denominator (the prior year-end balance the RMD is computed on) and shifts the tax bill into year-of-conversion brackets, which may be lower than the RMD-year brackets once Social Security and pension income stack on top of the forced RMD.

Worked example 3 — born 1947, already in distribution

An owner born in 1947 is age 79 in 2026 and has been in RMD-drawing status for years (RBD was age 70½ under the pre-SECURE grandfathered rule). The Traditional IRA balance on December 31, 2025 was $800,000.

• Distribution period factor at age 79: 21.1 (Uniform Lifetime Table).
• RMD for tax year 2026: $800,000 / 21.1 = $37,915.
• Deadline: December 31, 2026.

For the in-distribution years, the RMD denominator shrinks gradually as the factor declines with age — at age 80 next year the factor is 20.2, at 85 it is 16.0, at 90 it is 12.2. The RMD as a percentage of balance climbs from about 3.8% at first-RMD year to 15.6% by age 100. Owners with significant Traditional IRA balances late in life often see the RMD outpace their actual spending need, which is where the Qualified Charitable Distribution lever (discussed below) becomes most valuable.

Worked example 4 — missed $20,000 RMD, corrected within 2 years

An owner missed a $20,000 RMD for tax year 2024. The deadline was December 31, 2024; the correction window under SECURE 2.0 runs through December 31, 2026. The owner distributes the missed $20,000 in November 2026 and files Form 5329 reporting the missed amount and electing the reduced-rate correction.

• § 4974 excise tax rate (corrected within two-year window): 10%.
• Penalty: $20,000 × 10% = $2,000.

Worked example 5 — same missed RMD, not corrected

Same $20,000 missed RMD, same 2024 due date — but the owner does not distribute the missed amount within the correction window. The standard § 4974 rate applies.

• § 4974 excise tax rate (no correction): 25%.
• Penalty: $20,000 × 25% = $5,000.

The SECURE 2.0 reduction from 50% pre-act to 25% (or 10% with correction) substantially lowered the missed-RMD risk for late-distribution owners. Even at the 25% rate, the modern penalty is half the pre-SECURE-2.0 50% rate that made missed RMDs one of the harshest punitive items in the Code. The IRS also has long-standing administrative practice of waiving the penalty entirely on a "reasonable cause" showing — Form 5329 Section IX has a checkbox for the discretionary waiver request — but the SECURE 2.0 reduced rate is automatic and does not require IRS discretion.

Worked example 6 — Joint Life Table for spouse 15 years younger

An owner age 80 in 2026 has a $500,000 Traditional IRA. The sole designated beneficiary is the owner's spouse, age 65 (15 years younger). Under the joint-life-eligibility rule, the Joint Life and Last Survivor Expectancy Table (Treas. Reg. § 1.401(a)(9)-9, Table II) applies because the spouse is the sole beneficiary AND is more than 10 years younger.

• Uniform Lifetime Table factor at age 80: 20.2 (would yield RMD of $24,752).
• Joint Life Table factor (approximation: 20.2 + (15−10)×0.3 + 5 = 26.7) for owner 80 + spouse 65.
• RMD with Joint Life Table: $500,000 / 26.7 ≈ $18,727 — about $6,000 less than the Uniform Lifetime computation.

The Joint Life advantage compounds over multiple years and can preserve meaningful balances in tax-deferred status. Defeat eligibility by adding any non-spouse beneficiary (e.g., naming a child as contingent). To preserve joint-life treatment, practitioners commonly designate the spouse alone and name children only after the second-to-die via separate testamentary documents.

Qualified Charitable Distribution — the most underused RMD lever

IRC § 408(d)(8) permits an IRA owner age 70½ or older to direct up to $108,000 (2025 figure, inflation-adjusted annually) of the RMD directly to a qualified charity, excluding the distributed amount from gross income entirely. The QCD counts toward the RMD requirement. A $50,000 QCD on a $60,000 RMD leaves only $10,000 of taxable distribution.

The QCD is most valuable post-TCJA because the doubled standard deduction means most owners no longer itemize — an ordinary RMD-then-charitable-deduction sequence produces no tax benefit on the donation portion. The QCD preserves the tax benefit by excluding the donation from income at the source. The QCD is IRA-only (not 401(k) or 403(b)); the eligibility age remained at 70½ even after SECURE 2.0 raised the RBD; the recipient must generally be a public charity. SECURE 2.0 added a narrow one-time exception allowing QCDs up to $54,000 (2025 indexed) to a Charitable Remainder Trust or Charitable Gift Annuity — useful for owners who want the QCD tax treatment combined with a lifetime income stream back to themselves or a spouse.

Roth IRA exemption — the strategic moat

Roth IRAs are NOT subject to RMD during the owner's lifetime under IRC § 408A(c)(5). The owner can leave the Roth balance untouched indefinitely, taking distributions on the owner's own schedule, including never. This is one of the principal planning advantages of Roth over Traditional — no forced distributions, no forced income recognition, no forced bracket creep at age 73 or 75.

SECURE 2.0 also removed the RMD requirement for designated Roth 401(k) accounts effective 2024 — previously, Roth 401(k) balances were subject to RMD even though Roth IRAs were not, which created the awkward planning maneuver of rolling Roth 401(k) balances to a Roth IRA at RBD to avoid the RMD. SECURE 2.0 fixed that asymmetry. For RMD-age owners with significant Roth 401(k) balances, the rollover-to-Roth-IRA maneuver is no longer necessary; the in-plan Roth balance can stay deferred indefinitely.

Inherited Roths are a different story. The 10-year rule under SECURE 1.0 applies — no annual RMD, but the full balance must be distributed by the end of the 10th calendar year following the original owner's death. The 10-year clock starts at death; the beneficiary can take the full distribution at any pacing within the window, including a single lump sum on day one of year ten.

Aggregation rules — what counts as "one" RMD

The aggregation rules depend on the account type and are unforgiving when violated.

• Traditional IRAs: aggregable across all the owner's Traditional IRAs. The total RMD is computed account-by-account, but the actual withdrawal can come from any single IRA or be split across several. Most flexible aggregation in the rules.
• 401(k), 403(b), 457(b), TSP: NOT aggregable with each other or with IRAs. Each employer plan satisfies its own RMD separately. An owner with two 401(k)s from former employers and a Traditional IRA computes three separate RMDs and must take each from the corresponding plan.
• 403(b) accounts: aggregable with OTHER 403(b) accounts (but not with 401(k)s or IRAs).
• Inherited IRAs: separate inherited-RMD schedule (10-year rule under SECURE 1.0 for most non-spouse beneficiaries); not aggregable with the owner's own IRA RMDs.

The aggregation rule is one of the most commonly violated mechanics — practitioners frequently encounter owners who took the entire Traditional IRA RMD plus the 401(k) RMD from a single IRA, leaving the 401(k) RMD effectively unpaid and triggering the § 4974 excise tax on the 401(k) shortfall.

First-year April 1 grace — and the doubling trap

The RMD for the year the owner first reaches RBD may be deferred until April 1 of the following calendar year. This is the literal "Required Beginning Date" under IRC § 401(a)(9)(C). The deferral is a one-time grace — subsequent RMDs have a hard Dec 31 deadline.

Example: owner born 1953 turns 73 in 2026. First RMD (for tax year 2026) is due by April 1, 2027. Second RMD (for tax year 2027) is due by December 31, 2027. If the owner defers the first RMD to April 1, both RMDs land in calendar year 2027. On a $1M+ balance, that doubling can move the owner from the 22% to the 32% bracket. The April 1 grace is most useful when the first-year RMD year coincides with a low-income year (e.g., partial-year retirement), where the deferral fills the lower-income year with the first RMD and leaves the regular year-2 RMD to its own year.

Pre-RBD Roth conversion — the strategic playbook

The window between retirement and RBD is the highest-leverage RMD planning period. Roth conversions during this window do three things: (1) move balances from Traditional (where they will be subject to RMD) to Roth (where they will not); (2) shift the tax bill into the conversion year's bracket, which is typically lower than the RMD-year bracket once Social Security, pension income, and the forced RMD stack on top; (3) reduce the future RMD denominator on the remaining Traditional balance.

The mechanics: in any year before RBD, the owner converts some portion of the Traditional IRA balance to Roth by paying ordinary income tax on the conversion amount. The converted amount lands in the Roth, where it grows free of future RMDs. A common strategy is to convert each year up to the top of the current bracket — fill the 22% bracket without spilling into the 24% — until either the Traditional balance is drained or RBD arrives. For owners with significant Traditional IRA balances and a multi-year pre-RBD window, the Roth-conversion ladder can substantially reduce lifetime RMD exposure.

Common errors

• Missing the SECURE 2.0 cohort shift. Owners born 1953 still occasionally believe they reached RBD at 72 under SECURE 1.0; in fact SECURE 2.0 moved the 1951-1959 cohort to 73 by the time they hit the milestone. Always check by birth year, not by reference to a prior planning conversation.
• Aggregating across plan types. Taking the entire RMD from a single IRA when an additional 401(k) RMD is also due leaves the 401(k) shortfall exposed to the § 4974 excise tax. Compute each plan separately, then aggregate only within the eligible category (IRAs together, 403(b)s together).
• Defeating joint-life eligibility by adding a non-spouse contingent. A common estate-planning move — naming the spouse primary and the children contingent — defeats the joint-life eligibility rule. The spouse must be the SOLE beneficiary, not just primary. Use a separate testamentary document for children after the second-to-die if joint-life treatment is desired during the owner's lifetime.
• Forgetting the first-year doubling. Deferring the first RMD to April 1 doubles up two RMDs in the following calendar year. Owners near a bracket threshold should usually take the first RMD in the year of RBD, not defer.
• QCD eligibility age confusion. SECURE 2.0 raised the RBD to 73/75 but DID NOT raise the QCD eligibility age — it remains 70½. Owners between 70½ and 73 may take QCDs even though they have not yet hit RBD; the QCD is a useful pre-RBD tool for charitably-inclined owners who want to start moving Traditional IRA balances to charity early.
• Treating Roth 401(k) like the old rules. Pre-SECURE 2.0, Roth 401(k) balances were subject to RMD. SECURE 2.0 removed the requirement effective 2024. The rollover-to-Roth-IRA maneuver at RBD is no longer necessary for Roth 401(k) holders.

This calculator is a planning tool, not advice. The Uniform Lifetime Table factors above are the 2022 IRS update; the Joint Life Table computation uses a parametric approximation that is reasonable for planning but not for filing. For an actual tax filing, run the figures through IRS Pub. 590-B Appendix B (the full official tables) or, better, a CPA or financial planner who handles RMD planning as a regular practice. Tools, not advice.