IRA Estate Planning: How to Leave a Large IRA Without a Tax Disaster

A $2 million traditional IRA is not a $2 million inheritance. Every dollar your heirs withdraw is ordinary income taxed at their marginal rate — often 22–32% — with no step-up in basis, no capital-gains rate, and a mandatory 10-year depletion window. This guide covers the planning moves that reduce the lifetime tax cost of transferring a large IRA to the next generation.

What Happens to Your IRA When You Die

Your traditional IRA transfers to the named beneficiary by contract — not through your will. The beneficiary inherits the account but not a tax-free windfall. Every dollar they withdraw is included in their gross income in the year of withdrawal, at their ordinary income tax rate.¹

Before 2020, most non-spouse beneficiaries could use the "stretch IRA" — distributing over their own life expectancy and compounding tax-deferred for decades. The SECURE Act of 2019 eliminated that strategy for most heirs. The rules as they now stand:

The practical impact for most retirees: your adult children will likely receive your IRA in forced 10-year distributions taxed at their ordinary income rate. If you have a $1.5M IRA and two children, each inherits $750K and must pull down roughly $75K/year minimum — stacked on top of their own salary, which may already be in the 24–32% bracket.

The IRD Deduction: A Partial Tax Offset for Large Estates

If your estate is large enough to owe federal estate tax, there is a partial offset for heirs through the income in respect of a decedent (IRD) deduction under IRC §691(c).³

The mechanics: the IRA balance is included in your taxable estate (subject to estate tax at 40%). When your heirs later withdraw from the inherited IRA, they owe income tax on those same dollars. §691(c) prevents complete double taxation by allowing heirs to deduct the portion of federal estate tax that was attributable to the IRD item — the IRA — in the year they withdraw funds.

In practice, the deduction is valuable but incomplete. With the 2026 estate/gift exemption at $15 million per individual ($30M for a married couple) under the OBBBA,⁴ very few estates will actually owe federal estate tax. For most retirees, the IRD deduction is irrelevant — but for those with estates above $15M, it's worth modeling carefully.

Strategy 1: Roth Conversions — The Core Estate Planning Lever

The single highest-leverage move for most retirees with large traditional IRAs is systematic Roth conversion in the years before RMDs begin — and even continuing strategically after 73.⁵

Here's why Roth conversions are an estate planning tool, not just a retirement tax tool:

• You pay tax at your rate (often 22–24%); heirs would pay at theirs (often 24–32%). Converting pre-pays the tax at the lower rate.
• Inherited Roth IRAs still have the 10-year depletion rule — but with no annual RMD requirement and no income tax on any distribution. A $1M inherited Roth is worth dramatically more to heirs than a $1M inherited traditional IRA.
• Roth accounts reduce your taxable RMDs. Smaller traditional IRA balances produce smaller RMDs, which means less income tax during your own retirement — a double benefit.
• Roth accounts pass tax-free and don't affect IRMAA, Social Security taxation, or provisional income. Heirs can take distributions in any year without changing their own tax picture.

Use the Roth conversion sizing calculator to find how much you can convert each year while staying within a target bracket or below an IRMAA cliff.

Strategy 2: IRA to Charity, Assets to Heirs

Among all the assets in your estate, traditional IRAs are the worst to leave to human heirs and the best to leave to charity. The logic is simple:

• A charity pays zero income tax on IRA distributions. A $500K IRA left to a 501(c)(3) delivers $500K of value to the charity — intact.
• A $500K IRA left to an adult child in the 24% bracket delivers roughly $380K of after-tax value over 10 years (assuming all distributions are taxed at 24%).
• Meanwhile, appreciated non-IRA assets — stocks, real estate — do get the step-up in basis at death. Your heirs can sell a stock portfolio that cost you $200K but is worth $800K at death and pay zero capital gains.

The optimal asset allocation for legacy: leave IRAs (or the most heavily taxed portion of them) to charity, and leave taxable accounts and Roth accounts to human heirs.⁶

You don't have to wait until death. If you're 70½ or older, Qualified Charitable Distributions (QCDs) allow you to donate up to $111,000/year directly from your IRA to a qualified charity — the distribution is excluded from your gross income entirely. QCDs reduce your IRA balance during your lifetime, shrinking the inheritance tax burden on your heirs while also offsetting your RMDs. Use the QCD calculator to model the combined income, IRMAA, and estate planning impact.

Strategy 3: Naming Beneficiaries for Tax Efficiency

Given the SECURE Act 10-year rule, how you name beneficiaries has major tax implications. Key decisions:

Spouse first — always

A surviving spouse can roll over an inherited IRA into their own IRA, defer RMDs until their own RMD age, and make further Roth conversions. No other beneficiary gets this option. Always name your spouse as primary beneficiary unless there's a compelling reason not to.

Stagger adult children vs. charitable remainder

For adult children, consider whether splitting the IRA between multiple children is better than leaving it all to one. If one child is in a low-bracket year (returning to school, taking leave), they can take larger distributions in that year — but the 10-year rule doesn't allow flexible timing based on career events. The total must be distributed within 10 years of the owner's death.

Annual RMD requirement after T.D. 10001

If you die after your Required Beginning Date (April 1 following the year you turned 73), your adult-child heirs must take annual RMDs each year of the 10-year window — not just distribute everything in Year 10.² This reduces the flexibility heirs have in timing distributions to low-bracket years. It makes pre-death Roth conversions even more valuable for heirs.

Strategy 4: Trusts as IRA Beneficiary — Use Carefully

Naming a trust as IRA beneficiary is sometimes appropriate — for minor children, beneficiaries with special needs, or creditor protection concerns — but the mechanics are punishing and the default outcome is usually worse than naming individuals directly.

The compressed bracket problem: A trust reaches the top (37%) federal income tax bracket at just $16,000 of undistributed income in 2026, compared to $609,350 for a single filer.⁷ An inherited IRA held inside a non-conduit accumulation trust that retains income will pay top rates on everything above $16,000 — turning what would have been a 22% tax bill into a 37% one.

To avoid this, a trust must be structured as a conduit trust: it passes all IRA distributions through to beneficiaries each year (who pay tax at their individual rates). But conduit trusts provide less asset protection and control than accumulation trusts, undermining the reason many families use trusts in the first place.

For most retirees with straightforward heirs, naming individuals directly produces better outcomes than naming a trust. Consult an estate planning attorney before naming any trust as IRA beneficiary.

Strategy 5: Using the $15M Estate Exemption Efficiently with IRA Assets

The OBBBA (signed July 2025) permanently raised the federal estate and gift tax exemption to $15 million per individual — $30 million for a married couple — with no sunset.⁴ For most retirees, this means zero federal estate tax on assets passed at death.

However, the absence of estate tax doesn't eliminate income tax. The $15M exemption covers transfer tax, not the ordinary income tax your heirs pay when they withdraw from an inherited traditional IRA. Even a zero-estate-tax scenario still leaves your children with a multi-decade ordinary income tax obligation on the IRA balance.

The exemption does create new planning opportunities:

• Gifting during your lifetime is no longer urgent for tax reasons (there's no sunset to race against). You can spread IRA conversions more slowly.
• Roth conversions remain the primary lever even with a high exemption — because income tax is still owed on every traditional IRA dollar distributed, regardless of estate size.
• Large estates above $15M still benefit from careful asset-type assignment: direct taxable (stepped-up) assets to human heirs, IRAs to charity, Roth accounts to heirs who will benefit most from tax-free distributions.

What a Distribution-Planning Specialist Does Differently

Most estate planning attorneys focus on transfer tax, wills, trusts, and asset titling. Most financial advisors focus on growth. Very few think carefully about the multi-decade income tax obligation embedded in a large traditional IRA — which is the dominant tax issue for the 70+ retirees who have spent 30 years accumulating in 401(k)s.

A fee-only advisor who specializes in retirement distribution planning typically runs analysis across:

• Optimal Roth conversion amounts per year, constrained by bracket, IRMAA, and Social Security provisional income
• QCD deployment strategy to reduce IRA balance while satisfying charitable intent
• Beneficiary form review — ensuring designations align with the current law (SECURE Act, SECURE 2.0, T.D. 10001) and the current tax environment
• Asset location for legacy: which accounts to deplete first, which to preserve, and how Roth accounts interact with taxable accounts in estate planning
• Coordination with estate planning attorney on trust beneficiary decisions