Inherited IRA and Income in Respect of a Decedent

An inherited IRA faces a double-tax problem: the estate may owe estate tax on the balance at death, and the beneficiary later owes income tax on distributions. The income in respect of a decedent (IRD) deduction—a federal tax credit for the estate tax paid—partially offsets this burden, but the math is unforgiving and the planning window is narrow.

The double-tax trap

A large traditional IRA is a pre-tax asset. When the owner dies with a balance of $2 million and the estate is subject to estate tax (triggering at roughly $14 million in 2026, but lower in some states), the IRA counts as taxable estate and triggers federal estate tax—potentially 40% in tax, or $800,000, owed by the estate.

The beneficiary then inherits the IRA. Upon distribution—whether as a lump sum, over the required distribution period, or over their lifetime—the beneficiary pays ordinary income tax on withdrawals. The same $2 million dollars thus bear two layers of tax: first as an estate liability, second as income tax.

This is the core injustice that IRC §691 aims to repair, though imperfectly.

What is income in respect of a decedent?

Income in respect of a decedent (IRD) is income that was earned before death but not yet taxable when the person died. For traditional IRAs and 401(k) plans, the entire pre-tax balance qualifies as IRD because contributions were deducted and earnings were never taxed during life.

Roth IRAs are different: contributions were already taxed, and the beneficiary receives distributions tax-free. Roth balances are not IRD, so the double-tax problem does not apply (though the Roth balance is still part of the taxable estate for estate tax).

IRD also includes:

• Accrued but unpaid salary or bonuses
• Accounts receivable
• Deferred compensation plans
• Installment sale gains
• Dividends declared but not paid before death

For inherited retirement accounts, the IRD concept is the entry point to the deduction.

The IRC §691(c) deduction mechanics

IRC §691(c) allows the beneficiary a deduction in the year they recognize IRD income. The deduction is calculated as: the estate tax attributable to the IRD, multiplied by the fraction of IRD recognized in that year.

Example: An estate with $5 million in taxable value includes a $2 million traditional IRA. Estate tax at 40% is $2 million. The IRD (the IRA) is $2 million out of $5 million in taxable estate. The estate tax attributable to the IRD is $2 million × (2/5) = $800,000. When the beneficiary withdraws $100,000 from the IRA in year one, they can deduct $100,000 × ($800,000 / $2,000,000) = $40,000 on their income tax return.

This deduction reduces the income tax hit from the withdrawal, but it does not fully eliminate double taxation.

Why the deduction is incomplete

The IRC §691(c) deduction is valuable but often does not fully offset the double tax. Three reasons:

Bracket creep. Estate tax is owed immediately (or within nine months), at the estate’s marginal rate, typically 40%. Income tax on IRA distributions is owed at the beneficiary’s rate, which might be 24%, 32%, or 35%, depending on their other income. If the beneficiary is in a lower bracket than the estate’s 40%, the deduction does not compensate fully.

Basis limitation. The deduction cannot exceed the amount of IRD included in the gross estate. If the estate is partially sheltered by the marital deduction or the charitable deduction, the IRD deduction shrinks proportionally.

Time value. Estate tax is due upfront; income tax is spread over the beneficiary’s withdrawals (which may span decades). A dollar of estate tax today is worth more than a dollar of income tax credit tomorrow, so the deduction is mathematically less valuable.

Strategic considerations before death

The double-tax problem is most acute in large estates with substantial retirement accounts. Strategies to mitigate it (all with significant caveats) include:

Roth conversion. Converting traditional IRA to Roth IRA during life incurs income tax now but removes the IRA from the taxable estate and eliminates income tax on future distributions. This works only if the owner has years of life expectancy and adequate non-IRA assets to pay the conversion tax.

Charitable remainder trust. Naming a charitable remainder trust as IRA beneficiary can defer distributions, reduce the taxable estate via the charitable deduction, and spread income tax over the beneficiary’s lifetime.

Spousal rollover. If the beneficiary is the spouse, they can roll the IRA into their own account, deferring distributions until their own required minimum distribution age and potentially reducing both estate and income tax burdens.

Gift or spend down. Reducing the taxable estate below the estate tax threshold during life (via gifts or spending) eliminates the estate tax entirely, though it may not be feasible or desirable.

None of these are universal solutions; all carry complexity and tax costs.

Claiming the deduction on the beneficiary’s return

The IRC §691(c) deduction is claimed on the beneficiary’s individual Schedule D or appropriate income tax line when the IRD is recognized (withdrawn, distributed, or received). It is not a carryforward; it must be claimed in the year of income recognition. If the beneficiary fails to claim it, the deduction is lost.

Coordination with the estate is critical: the estate’s tax return must identify what portion of the estate’s tax was attributable to the IRD, so the beneficiary can calculate the deduction accurately. Poor coordination between estates and beneficiaries often results in lost deductions.

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