Inherited Roth IRA Rules

An inherited Roth IRA's distributions are almost always tax-free, with no 10% early-withdrawal penalty regardless of your age. For non-spouse beneficiaries on the 10-year rule, the July 2024 final regulations (TD 10001) confirmed there are no annual RMDs in years 1–9 — only the year-10 zero-balance deadline. Most articles on the internet still get this wrong.

The one thing almost every article gets wrong

If you remember only one fact from this guide, make it this one: beneficiaries of an inherited Roth IRA do not have to take annual required minimum distributions during the 10-year window. You can take $0 for nine years, let the account compound tax-free, and withdraw everything in year 10 — and it's all legal and penalty-free.

This contradicts a lot of online advice (and more than a few advisors). The confusion traces back to proposed regulations the IRS issued in 2022 that suggested some non-spouse beneficiaries would owe annual RMDs in years 1–9. That guidance applied only to Traditional IRA beneficiaries whose original owner had already started their own lifetime RMDs. Roth IRA owners never start RMDs during their lifetime — so that rule never applied to Roths in the first place.

The Treasury finalized the rules in July 2024 (Treasury Decision TD 10001, effective for distributions starting January 1, 2025) and confirmed the point explicitly: for purposes of the inherited IRA rules, a Roth IRA owner is always treated as having died before their “required beginning date.” That categorization means no annual RMDs during the 10-year window for Roth beneficiaries. Only the year-10 deadline to empty the account applies.

What the annual-RMD myth costs you

Here's a concrete version of the same point. Suppose you inherit a $500,000 Roth IRA and invest it to earn 7% a year — roughly the long-run return of a balanced portfolio. You have two extreme strategies available.

• Strategy A — defer to year 10: take nothing for nine years, let it compound, and withdraw the full balance in year 10.
• Strategy B — even draws: withdraw $50,000 each year for ten years.

Strategy B is what most people follow because they think they have to. On a $500,000 starting balance at 7% growth, it gives up $190,822 of tax-free compounding to manage taxes that don't exist. Figure 1 above shows how that gap scales with the portfolio's growth rate — from about $128,895 at 5% to about $259,646 at 9%.

There are situations where taking money out earlier makes sense — you need the income, you're in poor health and want to smooth distributions to your own heirs, or the account wasn't 5 years old at the owner's death (see the 5-year rule section below). But if none of those apply and you can afford to let the account keep compounding, letting it ride to year 10 is almost always the right move for a Roth.

What is an inherited Roth IRA?

When the owner of a Roth IRA dies, the account passes directly to whoever is named as beneficiary on the account — not through the will, not through probate. The custodian re-titles the account as an “inherited Roth IRA” (technically, a “beneficiary IRA” or a “decedent IRA,” depending on the custodian's language) with the beneficiary's name next to the decedent's: “Jane Smith, beneficiary of John Smith (deceased).”

The money inside keeps its Roth status. It continues growing tax-free. And when you withdraw, those distributions are still tax-free — as long as the original owner's account was open for at least 5 tax years at death. But unlike the original owner's Roth, which had no required distributions during life, an inherited Roth has a distribution deadline that depends on who you are.

Your options depend entirely on who you are

There are five distinct paths through the inherited Roth IRA rules. Figure 2 maps them. The rest of this article walks through each path in detail.

If you're the surviving spouse: four paths, not two

Most articles say a surviving spouse has two choices: treat it as your own, or keep it as inherited. In reality, you have four. Two of them rarely get mentioned, and one is new as of 2024.

Path 1. Treat it as your own (usually the best choice)

You contact the custodian and elect to treat the inherited Roth as your own. The account is re-titled in your name — no longer as a beneficiary account. From that moment on, the IRS treats you as the original owner. You owe no lifetime RMDs, you can add new contributions if you're otherwise eligible, you can do backdoor conversions, and when you die it passes to your own beneficiaries under a fresh set of rules.

For most spouses, this is the right move. The main reason not to pick it: you're under 59½ and might need to pull money out before then. Once the account is in your name, it's yours — and your own Roth rules apply, which include the 10% early-withdrawal penalty on earnings before 59½.

Path 2. Keep it as an inherited Roth (useful if you're under 59½)

If you keep the account registered as inherited, the 10% early-withdrawal penalty never applies to you at any age. That matters if you're, say, 52, recently widowed, and need access to the money now. You can withdraw freely before 59½ without penalty.

Once you turn 59½, the reason to keep it as inherited disappears. Most people switch to Path 1 at that point — you just tell the custodian you want to treat the account as your own.

Path 3. Disclaim (when the next generation should inherit)

This one surprises people. If you're the primary beneficiary but there are contingent beneficiaries behind you (typically your children), you can formally disclaim the inheritance. The IRA then passes to the contingent beneficiaries as though you had died before your spouse.

Why would you do this? Because you don't need the money, and your kids or grandkids get more years of tax-free compounding if they take it directly. A properly executed disclaimer can move hundreds of thousands of dollars of tax-free growth one generation further down the family tree.

The rules are strict. You have to disclaim within 9 months of the owner's death, in writing, and you cannot have accepted any benefit from the account (not even one RMD). Work with an estate attorney before you do this — a bungled disclaimer is worse than no disclaimer at all.

Path 4. Make the SECURE 2.0 §327 election (new for 2024)

SECURE 2.0 §327 (effective January 1, 2024) created a new option: a surviving spouse who keeps the account as an inherited IRA can elect to be treated as the deceased participant for RMD purposes, and use the Uniform Lifetime Table instead of the Single Life Table. The Uniform Lifetime Table produces smaller annual RMDs, which means more money stays in the account compounding.

For an inherited Roth specifically, this election matters less than for a Traditional IRA — the Roth has no lifetime RMDs anyway, so there's nothing to minimize. But the election is important if you have both Traditional and Roth inherited accounts from your spouse and want consistent, favorable RMD treatment across them. Ask your custodian about the election when you set up the account.

Partial disclaimer: the quiet estate-planning lever

Disclaimers don't have to be all-or-nothing. A spouse can disclaim a specific dollar amount or a fractional share of the inherited Roth — the disclaimed portion passes to the contingent beneficiaries (typically the children) while the rest stays with the surviving spouse. This is valuable for credit-shelter planning, for equalizing inheritances between spouses' heirs in blended families, or simply when the survivor only needs some of the money.

Mechanics are the same as a full disclaimer: 9-month window from the owner's death, in writing, and the spouse cannot have accepted any benefit from the disclaimed portion. The custodian has to be willing to bifurcate the account between the disclaimer and the retained interest. Treat this as attorney work, not something to DIY — but know it exists, because very few online guides mention it.

The 5-year rule: a specific-to-Roth trick for spouses

To be tax-free, distributions from an inherited Roth must satisfy the Roth 5-year rule: the account has to have been open for at least 5 tax years, measured from January 1 of the year of the first contribution. The clock never resets — not when the account is inherited, not when it moves custodians.

Here's the nuance every spouse should know: when a surviving spouse rolls the inherited Roth into their own Roth IRA (or treats it as their own), they can use the earlier of two 5-year clocks — the deceased spouse's clock, or the survivor's own Roth clock. Whichever started sooner wins.

Example: your spouse opened their Roth in 2014. You opened yours in 2022. When you inherit in 2026 and treat the account as your own, your 5-year clock for the combined account is 2014 — so the Roth is already well past the 5-year mark. You can withdraw earnings tax-free immediately (assuming you're 59½ or use another qualifying exception).

If the 5-year rule wasn't met: how basis tracking works

When the owner died before their Roth had been open five tax years, distributions to you are not fully tax-free — but they are not fully taxable either. The Roth's ordering rules under IRC §408A(d)(4) continue to apply to the inherited account. Distributions are deemed to come out in a specific order:

1. Regular contributions first — always tax-free and penalty-free, regardless of 5-year status.
2. Converted amounts next, in order oldest-to-newest — tax-free (the conversion was already taxed at the time it was done), and the 10% early-withdrawal penalty never applies to inherited accounts at any age.
3. Earnings last — these are the only component that's taxable when the 5-year rule wasn't met at the owner's death.

In practice: if Dad opened his Roth in 2023 with a $7,000 contribution, converted $50,000 in 2024, and died in 2026 with a $70,000 balance, the 5-year rule is not met. Of that $70,000, the first $7,000 you distribute is the contribution (tax-free always), the next $50,000 is the 2024 conversion (tax-free because conversions have already been taxed), and only the remaining $13,000 of earnings is taxable to you when distributed. The 10% early-withdrawal penalty never applies — inherited accounts are exempt by statute.

The practical implication: take contributions and conversions first, let earnings compound. Waiting until the account's 5-year clock matures (counted from the owner's original contribution year) flips the earnings portion from taxable to tax-free. If the owner's Roth was opened in 2023 and dies in 2026, the 5-year mark hits January 1, 2028 — only two more calendar years for the clock to mature. Staging distributions to take basis first and earnings last past the 2028 line can eliminate the taxable portion entirely.

The account custodian doesn't track this ordering for you. You'll need the owner's Form 5498 history (or their own records) to reconstruct contributions and conversions. Keep this paperwork with the inherited-account file.

The 10-year rule, explained correctly for Roth beneficiaries

If you're a non-spouse beneficiary and you don't qualify as an eligible designated beneficiary, you're on the 10-year rule. The rule is simpler than it looks:

• The account must be reduced to $0 by December 31 of the 10th calendar year following the year of the owner's death.
• For a Roth inherited from an owner who died in 2024, that deadline is December 31, 2034.
• In years 1 through 9, you can take any amount, including zero. There are no annual RMDs for an inherited Roth.
• You can take the entire balance in year 10 and owe no income tax, as long as the original owner's 5-year rule was met.

Figure 3 below shows what this timeline actually looks like for an owner who died in 2024.

The strategy implication flows directly from the picture: if you don't need the income, let it sit. Tax-free compounding on an inherited Roth is one of the most valuable things in the US tax code — deferring a withdrawal by nine years can mean six figures of additional tax-free wealth. If you do need the income, withdraw what you need. There's no penalty either way, as long as you're empty by year 10.

Who qualifies as an Eligible Designated Beneficiary?

EDBs get the most favorable treatment of all non-spouse beneficiaries: they're exempt from the 10-year rule and can take distributions over their own life expectancy — which for a young or middle-aged EDB can stretch 30 or more years of tax-free compounding. Under IRC §401(a)(9)(E)(ii) there are exactly five categories.

1. The surviving spouse. Covered in detail above.
2. A minor child of the deceased account owner, until age 21. The July 2024 final regulations set the age at 21 uniformly, regardless of what your state calls the age of majority. Once the child turns 21, the 10-year rule kicks in — the account must be emptied by December 31 of the year the child turns 31. Stepchildren don't qualify unless legally adopted. Grandchildren don't qualify as “minor child” under this category.
3. A disabled individual. The test is the Social Security Administration's definition: unable to engage in substantial gainful activity because of a medically determinable physical or mental impairment expected to last at least 12 months or result in death. Must be disabled as of the account owner's date of death.
4. A chronically ill individual. Defined by reference to IRC §7702B(c)(2) — unable to perform at least two activities of daily living for at least 90 days, certified by a licensed health-care practitioner.
5. An individual not more than 10 years younger than the deceased owner. Often a sibling, older friend, or unmarried partner. This is the category most commonly overlooked. A 65-year-old who inherits from a 70-year-old sibling is an EDB. A 45-year-old child who inherits from a 70-year-old parent is not (25 years younger) — which is why the parent-to-child case almost never qualifies under this category.

The successor beneficiary rule (the “ghost clock”)

This one is poorly explained almost everywhere. Here's the rule: if the first beneficiary dies before finishing the 10-year distribution window, the successor beneficiary — the second-generation heir — does not get a new 10-year clock. They inherit the remainder of the original clock.

Worked example. Your mother opens a Roth IRA in 2015. She dies in 2024 and leaves it to you. Your 10-year deadline is December 31, 2034. In 2028 you die — having never taken a withdrawal — and your will names your spouse as successor. Your spouse now has six years (to December 31, 2034) to empty the account. Not ten.

The rule applies regardless of your successor's relationship to anyone and regardless of whether the successor would have qualified as an eligible designated beneficiary if they'd inherited directly. The clock continues.

The planning implication. If you're the first beneficiary and you're in poor health, deferring is often still the right strategy — because your successor continues to benefit from tax-free compounding until the original deadline. But make sure the inherited Roth account itself has a successor beneficiary designation on file with the custodian. Relying on your will is worse — it can force the account into your estate, which triggers the 5-year rule.

When multiple beneficiaries share one account: the separate-account rule

If one Roth IRA names several beneficiaries — say, three adult children in equal shares — the default treatment groups them as a single designated beneficiary for rule-application purposes. That creates a ceiling: the group can't individually qualify for eligible-designated-beneficiary treatment even if one of them would have qualified as an EDB on their own, and each beneficiary's life expectancy is locked to the oldest.

Treas. Reg. §1.401(a)(9)-8, Q&A-2 and the 2024 final regulations confirm a cleaner path: establish separate inherited IRAs for each beneficiary by December 31 of the year following the owner's death. When you divide the single inherited account into individual inherited Roth IRAs — each re-titled in the beneficiary's name — each one is then tested under its own rules. An EDB sibling can take life-expectancy distributions; the non-EDB siblings each get their own 10-year window running from the owner's death.

Mechanics are straightforward: instruct the custodian to divide the account into separate inherited IRAs in each beneficiary's name, with each beneficiary's share funded pro rata. The division must happen by the end of the calendar year following the year of death — December 31, 2026 for a 2025 death — or the group stays locked into single-beneficiary treatment for the rest of the distribution period.

For pure 10-year-rule heirs who all qualify as non-EDBs, the separate-account election matters less for the distribution deadline (every non-EDB gets the same December 31 of year 10 deadline regardless). It still matters for administration: separate accounts let each beneficiary make their own investment and distribution choices without getting coordination consent from siblings. For mixed groups where even one beneficiary is an EDB, missing the separate-account deadline is a meaningful loss.

When a trust is the beneficiary

Naming a trust as beneficiary of your Roth IRA is a common estate-planning move. It can protect assets from creditors, manage spending for a minor or heir with special needs, and enforce discipline on a beneficiary who would otherwise spend through the inheritance. It's also one of the most technical areas of the inherited IRA rules.

See-through requirements (four rules)

For the trust's beneficiaries to be treated as the IRA's beneficiaries (and qualify for the 10-year rule instead of the much worse 5-year rule), the trust has to qualify as a “see-through trust.” The four requirements:

• The trust must be valid under state law.
• The trust must be irrevocable at the owner's death (revocable living trusts satisfy this automatically — they become irrevocable when the grantor dies).
• The trust's beneficiaries must be identifiable from the trust instrument.
• Documentation must be provided to the IRA custodian by October 31 of the year following the owner's death.

Conduit vs. accumulation trusts

A conduit trust must distribute every IRA withdrawal immediately to the trust beneficiary. They get the tax-free Roth money, but the trust loses most of its asset-protection benefit — the assets pass through and out.

An accumulation trust can hold distributions inside the trust for asset protection, spendthrift control, or divorce protection. The trade-off is usually the trust's compressed tax bracket (37% at roughly $15,000 of retained ordinary income), but this is mostly irrelevant for a Roth because Roth distributions to the trust are tax-free to begin with. That's why accumulation trusts are particularly attractive for inherited Roth IRAs: you get the asset protection without the compressed-bracket penalty you'd otherwise suffer with Traditional money.

The 2024 update almost no article covers: sub-trust division

The July 2024 final regulations confirmed a valuable planning technique. If a trust is divided into separate sub-trusts for each beneficiary immediately upon the account owner's death, each sub-trust is tested separately for eligible-designated-beneficiary status. A sub-trust for a minor child can use the EDB rules, while a sub-trust for an adult child uses the 10-year rule — without dragging the whole structure down to worst-case treatment.

Prior proposed regulations were ambiguous on this. The final regs settled it. If your estate plan predates mid-2024, it's worth a conversation with your attorney about whether your trust language can be tightened up to take advantage.

Charitable Remainder Trust: the advanced workaround that restores the stretch

The SECURE Act collapsed the traditional “stretch IRA” into a 10-year window for most non-spouse beneficiaries. But there's a legitimate structure that still delivers lifetime income to an individual beneficiary from inherited Roth dollars — the Charitable Remainder Trust (CRT).

The mechanics: name a CRT as the beneficiary of the Roth IRA. On the owner's death, the entire Roth balance transfers to the CRT within the 10-year window (because the CRT itself is a non-designated entity beneficiary, the account pours in and the CRT exits the IRA rules). The CRT then pays the named individual beneficiary a fixed annuity or unitrust percentage for life (or for a term up to 20 years), with whatever remains at the end passing to a qualified charity.

Two IRS-approved variants cover most cases:

• Charitable Remainder Annuity Trust (CRAT) — pays a fixed dollar amount each year. Simpler; better when you want predictable income and the trust is heavily invested in bonds.
• Charitable Remainder Unitrust (CRUT) — pays a fixed percentage (5% to 50%) of the trust's annual market value. Payout rises and falls with markets; typically preferred for long horizons because it benefits from growth.

The structure has to satisfy two IRS requirements under IRC §664: (a) the payout rate must be between 5% and 50%, and (b) the charity's projected remainder must be at least 10% of the initial trust value. Your estate attorney runs these calculations; most drafts use a 5% unitrust payout to a named individual for life, with a local hospital or alma mater as the remainder charity.

Why this works so well for Roth dollars specifically. CRTs are tax-exempt entities under IRC §664(c) — the trust itself pays no income tax on earnings inside it. For a traditional IRA, the tradeoff is that distributions to the individual beneficiary are taxed under a four-tier ordering regime that can keep distributions ordinary income for decades. For an inherited Roth that was already past the 5-year rule, the Roth pours in tax-free, compounds tax-free inside the CRT, and pays out to the individual tax-free. You've effectively recreated the pre-SECURE lifetime stretch — legally, with IRS blessing, and with a charitable remainder as the price.

When it makes sense. CRTs carry meaningful setup costs (typically $3,000–$7,000 in legal fees) and annual administration costs, so they're usually only worth it when the Roth balance is $500,000+ and the account owner genuinely wants some portion to go to charity. For owners who were already planning charitable bequests, a CRT-named Roth is often the single most tax-efficient way to give — the individual beneficiary gets decades of tax-free income and the charity gets the remainder.

This is deep estate-planning work. The draft language has to thread needle requirements across IRC §664, §408A, and the SECURE Act regulations. Any attorney you use should have specific experience with post-SECURE CRT-as-IRA-beneficiary designs; it is not general trust work.

What if you inherited a Roth 401(k) instead?

Roth 401(k) accounts used to carry a small disadvantage over Roth IRAs: the original participant had to take lifetime RMDs from their Roth 401(k), even though Roth IRA owners never did. That quirk created complicated “post-RBD” situations for beneficiaries.

SECURE 2.0 §325 fixed it. Starting January 1, 2024, Roth 401(k) accounts are not subject to lifetime RMDs for the original participant — aligning them with Roth IRAs. That means an inherited Roth 401(k) now follows the same favorable rules as an inherited Roth IRA: the original participant is always treated as having died before their RBD, no annual RMDs are required in years 1–9 of the 10-year window for non-spouse beneficiaries, and all distributions are tax-free if the original 5-year rule was met.

One practical note: employer plans still control operational details. Some plans force inherited Roth 401(k) funds out sooner than federal law requires or limit what non-spouse beneficiaries can do. A direct trustee-to-trustee transfer from the plan into an inherited Roth IRA is almost always the right move after inheriting a Roth 401(k) — it preserves full federal flexibility.

“Can I convert the inherited traditional IRA to a Roth?” — almost certainly not

This question comes up constantly, usually from someone who inherited a traditional IRA and wishes it were a Roth. The answer for non-spouse beneficiaries is clear: no. IRS guidance has been consistent — Notice 2008-30, Q&A-7 and subsequent rulings — that a non-spouse beneficiary cannot do a Roth conversion of an inherited traditional IRA. The conversion privilege belongs to the original account owner; it does not transfer to a beneficiary.

Spouses are the only exception, and only because they have a unique option unavailable to anyone else. A surviving spouse can treat the inherited traditional IRA as their own, which strips off the “inherited” label and reclassifies the funds as an ordinary traditional IRA in the spouse's name. From there — just like any other traditional-IRA owner — the spouse can execute a Roth conversion. The conversion itself is a taxable event at the spouse's ordinary income-tax rate; the point is that the option exists at all.

There's a narrower second path for inherited workplace plans. If you inherited a traditional 401(k) or 403(b) balance (not a traditional IRA), a non-spouse beneficiary can do a direct trustee-to-trustee rollover into an inherited Roth IRA under IRC §402(c)(11), paying income tax on the converted amount. The inherited Roth IRA is then subject to the normal 10-year or EDB rules. This workaround is specific to employer plan inheritances; it does not work for IRAs.

If you're reading this because you inherited a traditional IRA and hoped to convert it, the practical planning move is different: accept the taxable distributions over the 10-year window in the lowest-tax years you can manage (often years with lower income, before Social Security begins, or during a gap year), and direct the after-tax proceeds into your own Roth IRA via annual contributions if you qualify. That's not a conversion, but it's the closest available substitute.

How to actually set up an inherited Roth IRA

You don't set up a new account in the sense of opening one from scratch. The Roth IRA passes to you automatically when you're the named beneficiary — it's not a probate asset. But you do have administrative work to do.

1. Notify the custodian (Fidelity, Schwab, Vanguard, etc.) with a certified copy of the death certificate and proof of beneficiary status. They'll send you their inherited-IRA paperwork.
2. Re-title the account properly. The correct title is something like “Jane Smith, beneficiary of John Smith (deceased), Roth IRA.” Never move the funds into your own existing Roth unless you're the spouse treating it as your own. Commingling is an operational disaster — it can trigger a “deemed distribution” of the entire account.
3. Designate your own successor beneficiary on the new account. This is the easiest step people skip. Without it, the successor rules default to the IRA custodian's terms, which often means “your estate” — and estates are entity beneficiaries, which triggers the 5-year rule.
4. If you're a spouse, decide path 1, 2, 3, or 4 from the spouse section above. Tell the custodian in writing. Treat-as-own is a title change; rollover is an actual funds movement; disclaimer needs estate counsel; the §327 election has its own form.
5. Pick an investment plan. Many inherited accounts sit in the decedent's original holdings for years because nobody changes them. If the allocation doesn't match your goals or your time horizon (which is now a 10-year horizon, not a multi-decade one, for most non-spouses), reallocate.

Worked examples

The quiet benefit: inherited Roth distributions don't count as income for most thresholds

The headline benefit of an inherited Roth is that distributions are tax-free at the federal level. The under-discussed benefit is that those distributions also don't count as income for a long list of thresholds that can quietly tax or penalize retirees and families with college-age kids. This is where the Roth's advantage over traditional really compounds.

Medicare IRMAA surcharges

Medicare Part B and Part D premiums carry income-related surcharges (IRMAA) when your modified adjusted gross income exceeds a series of cliffs (around $106,000 single / $212,000 joint in 2026, rising through roughly $500,000 / $750,000). Taxable inherited traditional IRA distributions count in MAGI and can push you across a cliff — with the surcharge retroactively billed once the SSA processes your tax return two years later. Qualified Roth distributions — including inherited Roth distributions where the 5-year rule was met — do not count in MAGI for IRMAA purposes. That alone can be worth several thousand dollars per year for a married couple on Medicare.

Net Investment Income Tax (NIIT)

The 3.8% NIIT under IRC §1411 applies when MAGI exceeds $200,000 single / $250,000 joint. Taxable retirement distributions don't directly trigger NIIT, but they raise MAGI, which can pull other investment income (dividends, capital gains from a brokerage account) into NIIT range. Inherited Roth distributions stay out of MAGI, so they don't push your other investment income into NIIT liability.

Social Security benefit taxation

Up to 85% of Social Security benefits become taxable when “provisional income” exceeds thresholds set back in 1983 and never indexed. Inherited traditional IRA distributions count in provisional income and routinely push more Social Security into taxation. Inherited Roth distributions do not count. For retirees near the thresholds, this can mean the difference between 0% and 85% of their Social Security benefits being taxed.

FAFSA and financial aid

Starting with the 2024–25 FAFSA Simplification Act rewrite, untaxed retirement distributions no longer have to be manually reported by the family on FAFSA. But Adjusted Gross Income is pulled directly from the tax return via the IRS Direct Data Exchange, so taxable inherited traditional distributions still raise the Student Aid Index and can reduce aid. Inherited Roth distributions that qualify as tax-free don't appear in AGI and therefore don't hurt aid calculations. For families with a child in college during the inheritance window, this can be worth thousands in preserved need-based aid.

State tax conformity

Most states follow the federal treatment — qualified Roth distributions are tax-free at the state level too. A handful of states (notably Pennsylvania) have their own rules and should be checked individually. If you moved during or after the 10-year window, the state where you were resident when the distribution was taken generally controls.

Planning takeaway. The headline tax-free status of inherited Roths is only half the story. When you're modeling the cost of inheriting a Roth versus a traditional IRA of the same pretax balance, remember to factor in IRMAA, NIIT exposure, Social Security taxation, and aid formulas. The inherited Roth's advantage is often much bigger than the simple federal-tax differential suggests.

Planning your own estate? Why a Roth is the best IRA to leave behind

Most of this article is written for the person who just inherited. If you're the owner thinking about how to structure your own legacy, the case for leaving Roth dollars rather than traditional dollars is unusually strong — stronger than almost any article written before TD 10001 acknowledges.

No annual-RMD drag on your heirs

A non-EDB heir who inherits a traditional IRA from an owner who had passed their RBD must take annual RMDs during years 1–9 of the 10-year window under the final regulations' “at-least-as-rapidly” rule. A non-EDB heir who inherits a Roth takes no annual RMDs because the Roth owner is always treated as having died before their RBD. That means 10 uninterrupted years of tax-free compounding for your heir instead of forced withdrawals taxed in their top bracket while they're still working.

You've already paid the tax; your heirs inherit compounding, not liability

Leaving a $500,000 traditional IRA to a child in their peak earning years typically means $125,000–$185,000 of federal income tax, plus state tax, plus possible IRMAA and NIIT drag — often 30–40% of the balance vaporized across the 10-year window. Leaving $500,000 of Roth is $500,000 to the heir, period. If your marginal rate today is lower than your child's will be in their 40s, converting during your lifetime and leaving the resulting Roth is often the highest-return use of your tax bracket.

Roth IRAs let accumulation trusts actually work

Accumulation trusts — the structure you'd use if you have a beneficiary you want to protect from spendthrift issues, creditors, or a difficult spouse — are usually disfigured by the trust's compressed 37% tax bracket when traditional IRA distributions are retained inside. Because Roth distributions enter the trust tax-free, that penalty disappears. If your estate plan requires trust-protected inheritance, a Roth is the IRA that doesn't fight the trust.

Lifetime conversions are a direct bequest lever

Every dollar you convert from traditional to Roth during your lifetime at your ordinary income-tax rate removes that dollar from the future RMD regime your heirs would inherit. “Conversion years” are usually the window between retirement (when earned income drops to zero) and age 73 (when your own RMDs begin); that's often a 10-to-13-year stretch with unusually low marginal rates. Converting during this window typically costs you 12–22% federal while saving your heirs a marginal rate of 24–37%. For detailed mechanics, see our Roth Conversion Rules guide.

The asymmetric case: you can always spend traditional; heirs can only keep Roth

You can always tap a traditional IRA yourself — you'll pay tax, but you control the bracket. Your heirs can't control the bracket of an inherited traditional; they're locked into their tax life during the 10-year window. So the mental model is: spend traditional, leave Roth. If you end up needing the Roth for your own expenses, fine — your qualified distributions are tax-free to you too. But orienting the estate plan toward leaving Roth dollars costs you nothing in flexibility and gives your heirs the single most powerful tax-advantaged asset the code produces.

Common mistakes to avoid

What happens if you miss the deadline?

Failing to empty the account by December 31 of year 10 — or failing to take an RMD if you're an EDB — triggers an excise tax under IRC §4974. The rate was 50% for decades. SECURE 2.0 reduced it to 25% effective 2023. And if you catch the miss and correct it within the two-year correction window (plus file Form 5329), the rate drops to 10%. The IRS will also waive the penalty for reasonable cause if you request a waiver on Form 5329.

The takeaway: the penalty is real, but there are off-ramps. Don't ignore a missed RMD — file Form 5329 with the correction and a request for waiver. Most are granted.

How to actually file the Form 5329 waiver request

The waiver mechanics trip people up because the instructions are buried in IRS Publication 590-B and Form 5329's own instructions. Here's the practical sequence:

1. Take the missed distribution immediately — don't wait for IRS response. The waiver is only available if you've already corrected the shortfall.
2. Complete Form 5329, Part IX (“Additional Tax on Excess Accumulation in Qualified Retirement Plans”). On line 54, report the amount you should have taken. On line 55, enter the amount actually taken. The difference is the shortfall.
3. On line 55, also write “RC” and the amount you want waived in the margin. RC stands for “reasonable cause.” This signals to the IRS that you are requesting the waiver.
4. Attach a statement of explanation — a short letter on plain paper explaining the cause (e.g., “the executor failed to notify me of the inherited IRA until after year-end,” or “the custodian's RMD calculation omitted this account”). Describe how you've corrected the shortfall and the safeguards you've put in place to prevent recurrence.
5. File Form 5329 with your annual Form 1040 (or as a standalone if you've already filed). Pay no excise tax with the filing — the waiver request defers payment pending IRS decision.

The IRS has historically been lenient with first-time, corrected misses backed by a reasonable explanation. Most waivers are granted silently — if you never hear back, assume granted. If the IRS rejects the waiver, you'll receive a CP15 notice and owe the excise tax at that point.