RMD Calculator

RMD Rules Worth Knowing Cold

Who owes, and when

SECURE 2.0 set the starting age at 73 (rising to 75 in 2033). Your first RMD can be delayed to April 1 of the following year — but that stacks two taxable distributions into one year, often a bracket mistake. Traditional IRAs, SEP/SIMPLE IRAs, and workplace plans all generate RMDs; Roth IRAs never do during the owner's life, and as of 2024 Roth 401(k)s are finally exempt too. Still working past 73? The still-working exception defers RMDs from your current employer's plan only — IRAs get no such pass.

The aggregation traps

Multiple IRAs: calculate each RMD, then withdraw the total from any combination — fine. Multiple 401(k)s: each plan's RMD must come from that plan specifically. Mixing these rules up is a classic penalty generator. Inherited accounts run on entirely different (and stricter) timetables — most non-spouse heirs since 2020 face the 10-year emptying rule with annual RMDs if the original owner had started theirs.

Managing the tax, not just the rule

RMDs are ordinary income that can snowball: pushing you into higher brackets, triggering Medicare IRMAA surcharges (which look back two years), and taxing more of your Social Security. The planning happens before 73 — Roth conversions in the gap years between retirement and RMD age deliberately shrink future required distributions. After 73, QCDs and timing withdrawals against low-income years are the remaining levers.

RMD percentages by age: how the required slice grows

The Uniform Lifetime Table's divisors translate into withdrawal percentages that start gentle and steepen — the design deliberately drains tax-deferred accounts across a statistical lifetime.

Two readings of the table drive planning. First, the early percentages sit below typical portfolio growth — a 73-year-old's 3.77% is under the long-run balanced-portfolio return, so balances often keep growing through the first RMD decade, compounding the later requirements. Second, the steepening back half is where bracket problems live: a healthy 90-year-old with a still-large IRA is forced to realize 8%+ annually whether or not they need it, which is precisely the future that pre-73 Roth conversions exist to shrink.

The QCD: the cleanest tax move in retirement

For anyone 70½ or older with charitable intent, the qualified charitable distribution outperforms every alternative way of giving. Money moves directly from the IRA custodian to a qualified charity — up to $108,000 per person in 2025 — counting toward the year's RMD while never appearing in adjusted gross income. That AGI exclusion is the magic: unlike deducting a donation (worthless to the ~90% who take the standard deduction), a QCD reduces income before the thresholds that matter cascade — Medicare IRMAA surcharges, Social Security taxation, net-investment-income tax exposure. A retiree giving $10,000 anyway who routes it as a QCD instead of cash saves their full marginal rate plus any threshold effects, commonly $2,500–4,000 of real tax on identical generosity. The mechanics have sharp edges worth respecting: the check must go custodian-to-charity (or via IRA checkbook, deposited by December 31), donor-advised funds and private foundations don't qualify, and the first dollars out of the IRA each year count as RMD — so QCD timing belongs before taking cash distributions, not after.

What people get wrong

• Waiting until December. Year-end RMD crunch is when custodian delays and market timing collide with a hard deadline. Automating monthly or quarterly distributions early in the year removes both the deadline risk and the temptation to time markets with required money.
• Taking RMDs from the wrong assets. In-kind distribution of temporarily depressed shares, or cash-raising from the overweight asset class, turns the requirement into a rebalancing tool. The requirement is dollars out, not which dollars.
• Forgetting the spouse-age exception. A sole-beneficiary spouse more than 10 years younger switches you to the Joint Life Table — larger divisors, smaller RMDs — and custodian defaults don't always catch it.
• Assuming inherited accounts follow these rules. Post-2019 non-spouse inheritances run the 10-year rule with, per 2024 final regulations, annual RMDs in years 1–9 when the decedent had begun theirs. Different table, different clock, different penalties.

Coordinating RMDs with the rest of retirement income

An RMD is one instrument in an income orchestra, and sequencing decides the tax bill. The conventional withdrawal order — taxable accounts first, tax-deferred second, Roth last — gets modified in RMD years because the required distribution jumps the queue: it comes out regardless, so the planning question becomes what fills the rest of spending need around it. Retirees whose RMD exceeds spending face the pleasant version (reinvest the surplus, QCD the charitable slice); those whose RMD falls short choose the top-up source by bracket position — more IRA if room remains in a cheap bracket, taxable-account gains at capital rates if not, Roth only when both would spill into painful territory. Two coordination points recur. Social Security taxation runs on a formula where each RMD dollar can drag up to 85 cents of benefits into taxable income — the effective marginal rate through that zone spikes to 22–40%+ even inside nominal 12–22% brackets, the "tax torpedo" that makes bracket edges deceptive for benefit recipients. And state treatment varies enough to matter: a dozen-plus states exempt some or all retirement-account distributions (Illinois and Mississippi fully; Pennsylvania taxes none of it after 59½), while others tax RMDs as ordinary income — geography quietly reprices every distribution decision on this page.

Automating compliance: the set-and-verify system

The RMD is annually recurring, penalty-backed, and computable in advance — the exact profile of a task that should never be manual. Every major custodian offers automatic RMD service: they compute from the prior December 31 balance, distribute on your schedule (monthly for income-smoothing, or a chosen date), and withhold taxes at your elected rate — that withholding election being a quiet superpower, since IRA withholding is treated as paid evenly through the year regardless of when it happens, letting a December distribution with heavy withholding cure a year's worth of estimated-payment shortfall. The verify half of the system: each January, confirm the custodian's stated RMD against this calculator (divisor errors are rare but real, especially after spouse-age changes), confirm multiple-401(k) RMDs are each being taken from their own plan, and after any rollover, check that the receiving custodian knows the prior year-end balance. Fifteen minutes annually against a 25% penalty is the best-paid quarter hour in retirement administration.

The first-year decision: April 1 or December 31

Your very first RMD carries a one-time election: take it by December 31 of the year you turn 73, or defer to April 1 of the following year. Deferral sounds like free money and usually isn't — the second year then contains two RMDs (the deferred one plus its own), stacking income into one return where it can jump brackets, spike IRMAA two years later, and drag extra Social Security into taxation. The deferral wins only in specific shapes: a final high-income working year at 73 (still-working wages make the first-year rates worse than next year's), or a known one-time income drop coming. Everyone else takes year one on time — and ideally models the choice in October of the turning-73 year, when both years' incomes are estimable and the calculator above prices each path in ten minutes.

Where the rules come from

The age-73 start (rising to 75 in 2033) is SECURE 2.0 (2022); the penalty reduction from 50% to 25%/10% is the same act. The Uniform Lifetime Table divisors are Treasury Regulation §1.401(a)(9)-9 as updated in 2022; the spouse exception is Table II of the same regulation. QCD rules live in IRC §408(d)(8) with the limit inflation-indexed by SECURE 2.0. The Roth 401(k) RMD exemption effective 2024 is SECURE 2.0 §325. The 2024 final regulations settling annual RMDs inside the 10-year inherited window are the Treasury's §401(a)(9) package — a genuinely contested question for four years, now resolved against the wait-and-empty strategy.

Frequently asked questions

What exactly is the penalty for missing an RMD?

25% of the shortfall (down from the old 50%), reduced to 10% if you fix it within the correction window (roughly two years). The IRS also waives it for reasonable cause via Form 5329 with an explanation — historically granted generously to genuine mistakes.

Do RMDs apply to Roth accounts?

Not to Roth IRAs during your lifetime, and since 2024 not to Roth 401(k)s either. Inherited Roths do carry distribution requirements for beneficiaries — tax-free, but on the clock.

Can I take my RMD in-kind instead of cash?

Yes — transferring shares to a taxable account satisfies the RMD, with the distribution valued at transfer-date market price. Useful when you don't want to sell a position; the shares get a new basis at that value.

Can I reinvest my RMD if I don't need the money?

Yes — the requirement is distribution, not spending. Reinvesting in a taxable brokerage (ideally in tax-efficient index funds) keeps the money compounding with only the distribution taxed. What you cannot do is roll an RMD into another retirement account or convert it to Roth; required dollars are ineligible for both.

Do RMDs affect my Medicare premiums?

Often — RMD income counts toward the modified AGI that sets IRMAA surcharges two years later, and the brackets are cliffs: one dollar over a threshold adds $800–4,000+ per person per year at 2025 rates. Large-IRA retirees managing withdrawals near a bracket edge have real money riding on QCDs and timing.