How Required Minimum Distributions (RMDs) Work in the USA
The forced withdrawals nobody plans for — ages, percentages, the accounts they hit, the penalties for missing them, and the moves that soften the whole system.
The deal behind a traditional IRA or 401(k) was always the same: money goes in untaxed, compounds untaxed, and the government collects when you take it out. RMDs are the government’s collection mechanism — a legal minimum you must withdraw (and pay tax on) each year once you reach the threshold age, so the tax deferral can’t become tax avoidance forever.
The system is mechanical, but the edges catch people constantly: the age has changed twice recently (72 under SECURE 2.0, now 73, rising to 75), the penalty for missing a distribution has been brutally expensive for decades (recently softened from 50% to 25% — still terrible), and retirees with large balances routinely discover that RMDs push them into higher Medicare brackets and higher taxes than they ever planned for. This guide covers the mechanics, then the planning that makes them manageable.
The Rules in Plain Language
- Who: owners of traditional IRAs, SEP and SIMPLE IRAs, 401(k)s, 403(b)s, and most other defined-contribution plans. Roth IRAs have no RMDs during the owner’s lifetime (the reason Roths are the favorite account of planners — see our Roth vs. traditional guide). Roth 401(k)s historically did have RMDs, but as of 2024 they no longer do while still held in the plan.
- When: RMDs begin at age 73 for those born 1951–1959, and age 75 for those born 1960 or later (SECURE 2.0). Your first RMD can be delayed to April 1 of the following year — but then you owe two RMDs that year, stacking income; most planners advise taking the first one by December 31 of the age-73 year.
- How much: each December 31 account balance ÷ a life-expectancy factor from the IRS Uniform Lifetime Table. At 73 the factor is 26.5 — so the first year’s RMD is roughly 3.77% of the balance (~1/26.5). The percentage rises each year: ~4.4% at 78, ~5.3% at 82, ~6.8% at 87.
- When it ends: RMDs continue annually for the owner’s lifetime. Beneficiaries have their own (generally faster) distribution schedule — the 10-year rule for most non-spouse heirs under SECURE — which is covered in our estate planning guide.
The Mechanics That Trip People Up
| Rule | What people get wrong |
|---|---|
| Each IRA separately calculated, aggregated for withdrawal | The RMD for each traditional IRA is computed on its own balance, but the total can be taken from any one IRA. 401(k)s and 403(b)s are separate — you can’t satisfy a 401(k) RMD from an IRA (the still-working exception below explains the flip side). |
| December 31 valuation date | A late-December market drop doesn’t reduce that year’s RMD — it’s already locked. Plan withdrawals before the last two weeks of the year, when call volumes and settlement deadlines bite. |
| QCDs satisfy RMDs directly | A Qualified Charitable Distribution (up to $108,000/year) moves IRA money straight to charity, counts toward the RMD, and never appears in taxable income — the single best move for charitably-inclined retirees. |
| The still-working exception | If you’re still employed and don’t own 5%+ of the company, you can delay that employer’s current 401(k) RMDs until retirement — but it never applies to IRAs, old employers’ plans, or your own accounts. |
The Penalty (and the Waiver)
Miss an RMD, or take too little, and the excise tax is 25% of the shortfall (down from 50% under SECURE 2.0, and droppable to 10% if corrected promptly). The correction path: withdraw the shortfall, file Form 5329, attach a brief letter explaining the error. The IRS grants waivers routinely for reasonable causes — the death of a spouse, serious illness, a custodian’s error, a bad first year of advisory transition. What it does not waive is negligence repeated annually: the same mistake two years running reads as willful.
The Real Problem: The Tax Bracket Cascade
The RMD itself is mechanical; its knock-on effects are the actual planning problem:
- Ordinary income stacking: RMDs stack on top of Social Security (which becomes up to 85% taxable as income rises — the claiming side is in our Social Security timing guide), pensions, and interest, pushing marginal brackets up.
- IRMAA — the Medicare stealth tax: higher modified AGI triggers Medicare Part B and D premium surcharges two years later. The brackets start around $106,000 single/$212,000 married (2025) — a single extra dollar of income at a cliff boundary can cost thousands in surcharges.
- The widow’s penalty: when a spouse dies, the survivor files single with roughly the same RMDs — into half-size brackets. This is the harshest edge in the whole system, and it deserves explicit planning in the years before.
The Moves That Soften RMDs
- QCDs (after 70½): as above — direct IRA-to-charity transfers count toward the RMD and stay out of AGI entirely. For generous retirees this dominates cash giving, deducting where standard deductions have made itemizing rare.
- Roth conversions in the 62–73 window: the years between retirement (or Social Security) and RMD age are often the lowest-income years of your remaining life. Converting traditional money to Roth then — paying tax deliberately at a low bracket — shrinks future RMDs permanently and creates tax-free money for heirs. The year-by-year mechanics pair with capital-gains planning for taxable-account coordination.
- Spend-down order: retirees often default to spending taxable accounts first (lower tax now), which leaves tax-deferred balances growing into bigger RMDs later. The right order is usually a blend — spend taxable and convert to Roth simultaneously in low years.
- Still-working exception: delay your current employer’s 401(k) RMD while rolling old plans into it — then take a full distribution schedule starting at retirement.
- Donor-advised funds and bunching: for those above QCD limits or holding appreciated stock, multi-year charitable bunching in a single high-income year can flatten IRMAA cliffs.
Beneficiary RMDs: The 10-Year Trap
Inherited accounts follow a harsher schedule than most heirs expect. Under SECURE’s 10-year rule, most non-spouse beneficiaries (children, siblings, friends) must empty an inherited traditional IRA within 10 years of the original owner’s death — either evenly (required for most, per IRS regulations clarified in 2022–24) or as a lump sum, with the withdrawn amounts taxed as ordinary income. A $400,000 inherited IRA spread over 10 years adds $40,000/year of taxable income to an heir who’s likely mid-career — a bracket catastrophe for the unprepared, and a planning conversation parents should have with adult children before it lands. Spouses escape the 10-year rule (they can treat the account as their own); minors and disabled heirs have their own slower schedules. The full inheritance picture is in our family estate planning guide.
Your Annual RMD Checklist
RMD season runs quietly through the fall every year in the USA — and a simple checklist, run once, prevents nearly every mistake:
- August–September: log into each account and read the custodian’s calculated RMD for the year. Verify the number matches the table math (December 31 balance ÷ your age factor) — custodians occasionally hold stale balances from rollovers mid-December.
- Check for aggregation eligibility: multiple traditional IRAs can satisfy each other’s RMDs in any combination; 401(k)s must be satisfied from their own plan. If you’re doing Roth conversions this year, remember the RMD must come out first — converting before taking the RMD is a classic sequencing error.
- October: execute — directly, via QCD, or from whichever account makes tax sense. Do not leave it for the last week of December, when processing delays can strand a distribution across the year boundary and trigger the penalty.
- Confirm withholding: federal withholding (the default is often 10%) rarely covers the actual tax on a large RMD. Set withholding or make an estimated payment so April doesn’t bring a surprise bill with interest.
- Year-end: confirm every account’s distribution posted. Screenshot it. If anything is short, correct immediately and file the waiver with Form 5329 — the promptly-corrected penalty relief path is real, but only for people who catch the error.
The retirees who never think about RMDs are the ones who automated the withdrawal at the custodian and automated the withholding with it — the whole obligation then runs as background noise, which is precisely what a mechanical rule deserves. The ones who think about RMDs a lot are the planners, using the low-income years before 73 to convert, donate, and position — turning the forced-withdrawal system into a deliberate income design.
RMDs vs. Every Other Income Stream: The Ordering Question
Retirement income in the USA arrives from several sources — Social Security, pensions, savings withdrawals, RMDs — and the order you spend them in shapes the taxes on all the others:
- RMDs are non-negotiable: that money comes out and gets taxed regardless of what else you do. The planning question is what it stacks against — and the answer determines bracket placement.
- Delaying Social Security pairs well with RMDs: a higher, later, inflation-adjusted check (the claiming math is in our timing guide) means less withdrawal pressure from savings in your 80s — the years when RMD percentages are large and the account is doing forced work anyway.
- Taxable brokerage money is usually the first spend-down: selling appreciated shares in a taxable account costs capital-gains rates (often 15%), while RMD dollars cost ordinary rates (up to 37%) — the differential is a standing argument for spending taxable first and letting tax-deferred compound, balanced against RMD growth shrinking that advantage each year.
- Cash and high-yield savings for volatility protection: holding 1–2 years of spending in cash means RMDs and withdrawals in a crash year are never forced sales at the bottom — the savings layer is the shock absorber for the whole sequence.
The integrated view: RMDs are one stream in a sequence, not a standalone obligation. Their size (a function of decades of savings) and their stacking (a function of claiming and spend-down order) interact with every other choice — which is why the best RMD planning happens at 62, not 73: the conversion window, the claiming decision, and the account ordering all precede the first forced withdrawal.
What Retirees Say
“I retired at 65 and did Roth conversions for seven low-income years before RMDs started. My account was $780,000 when the first RMD hit — it would have been over a million without the conversions. The difference in what I owe every year since is more than the conversion taxes cost.”
— Verified reader, shared with permission
“Nobody warned me about IRMAA. One year my RMD plus a bonus from a consulting gig pushed me over a bracket I didn’t know existed, and two years later my Medicare premiums jumped. The surcharge cost more than the extra income.”
— Verified reader, shared with permission
Frequently Asked Questions
At what age do RMDs start?
Age 73 if you were born 1951–1959; age 75 if born 1960 or later (both under SECURE 2.0). The first distribution can be postponed to April 1 of the following year — but that means taking two RMDs in one tax year, stacking income into a higher bracket, so most retirees take the first one by December 31 of the year they reach the threshold age.
How is my RMD calculated?
Each account’s prior December 31 balance divided by an IRS life-expectancy factor (the Uniform Lifetime Table). At 73 the factor is 26.5, so the first RMD is about 3.8% of the balance; the percentage rises each year with age. IRA RMDs can be aggregated — calculated per account, withdrawn from any one. Your custodian’s website shows the exact required figure each year.
Do Roth accounts have RMDs?
Roth IRAs: no RMDs ever, during your lifetime. Roth 401(k)s: no RMDs while you’re alive and still hold the plan (changed in 2024 — older advice says otherwise). Inherited Roths have distribution requirements for heirs (the 10-year rule, though withdrawals are tax-free). This lifetime freedom is a core reason planners favor Roth conversions.
What happens if I miss an RMD?
A 25% excise tax on the amount not withdrawn (reducible to 10% if corrected within two years). Fix it fast: withdraw the shortfall, file Form 5329 with the reasonable-cause waiver request. The IRS waives most first-time, promptly-corrected errors. Then turn on automatic distributions at the custodian so it never happens again.
Can I avoid RMDs by converting to a Roth IRA?
Yes — conversions move money from RMD-required accounts into accounts with none, permanently shrinking future required withdrawals (the converted amount is taxed in the conversion year). The optimal window is usually the low-income years between retirement and RMD age: convert enough each year to fill lower brackets without crossing into higher ones or into IRMAA Medicare surcharge territory. Current rules and worksheets are at the IRS retirement plans pages (see IRS.gov).
The Bottom Line
RMDs are a mechanical obligation wrapped around a planning opportunity. The obligation: know your age trigger (73 or 75), let the custodian automate the withdrawal, and never eat a penalty that a checkbox prevents. The opportunity: the years before RMDs start are the lowest-tax years you’ll ever see again — Roth conversions, QCDs, and deliberate spend-down ordering in that window decide whether your 70s and 80s run at a 12% bracket or a 24% one, and whether your heirs inherit a tax problem or a tax-free account.
Next steps: the claiming math that stacks against RMDs is in our Social Security timing guide, the account framework in the Roth vs. traditional comparison, and the lifetime picture in retirement planning by age.
