What You're Leaving Your Heirs: The Tax Burden on Inherited Retirement Accounts

The Asset You Should Not Leave to Heirs

Traditional IRAs and 401(k) accounts are among the worst assets to leave to non-spouse beneficiaries from a tax perspective. Every dollar in a pre-tax retirement account was contributed before taxes and has grown without being taxed. When heirs receive it, they owe ordinary income tax on every dollar they withdraw. Before the SECURE Act of 2019, non-spouse beneficiaries could 'stretch' inherited IRA distributions over their own lifetime - taking small annual withdrawals and spreading the tax bill across decades. A 45-year-old inheriting from a parent could stretch distributions over 38 years, keeping annual amounts small and taxable income manageable. The SECURE Act eliminated the stretch IRA for most non-spouse beneficiaries. Now, adult children who inherit your traditional IRA or 401(k) must empty the entire account within 10 years of your death. The IRS further clarified in 2024 regulations that annual distributions may be required within those 10 years if the original owner had already reached their required beginning date for RMDs. For an adult child in their peak earning years - already in the 22% to 32% bracket from their own salary - inheriting $400,000 in a traditional IRA means roughly $40,000 in forced annual distributions stacked on top of their existing income. At a 24% effective rate on those distributions, the $400,000 inheritance nets approximately $304,000 over 10 years. The IRS claims $96,000 of the inheritance before the heir spends a dollar of it. Multiply that across a $1 million IRA, and a $240,000 tax bill follows the inheritance - paid at a time when the heir's own income is likely at its highest.

Which Assets Pass Most Tax-Efficiently

Not all inherited assets carry the same tax burden. Understanding the tax treatment of each asset type allows you to position the most tax-efficient assets for inheritance while spending from the least efficient ones during your lifetime. Roth IRAs pass to heirs tax-free. The beneficiary must distribute the account within 10 years under the SECURE Act rules, but every dollar distributed is income-tax-free. A $400,000 Roth IRA inherited by an adult child delivers the full $400,000 in after-tax value. The heir still has 10 years to distribute, but the tax liability is zero on the distributions themselves. Taxable brokerage accounts benefit from the step-up in basis rule. When a beneficiary inherits stock or other appreciated assets held in a taxable account, the cost basis resets to the fair market value at the date of death. If you purchased stock for $50,000 and it is worth $200,000 when you die, the heir's basis is $200,000. If they sell it immediately, they owe zero capital gains tax on the $150,000 in appreciation that occurred during your lifetime. The entire pre-death gain escapes capital gains tax entirely. Real estate also receives a step-up in basis. A $300,000 home purchased for $80,000 has $220,000 in unrealized appreciation. At death, the heir's basis becomes $300,000. A quick sale generates no capital gains tax. However, depreciation taken on rental properties does not receive the same treatment - the depreciation recapture that would have been triggered on a sale is eliminated at death, which is one of the most significant tax advantages of holding depreciable rental property until death. Life insurance death benefits are income-tax-free to beneficiaries under IRC Section 101(a). A $500,000 life insurance death benefit pays $500,000 to the named beneficiary immediately, with no income tax, no 10-year distribution requirement, and no interaction with the beneficiary's other income for tax purposes.

The Most Tax-Efficient Inheritance Strategy

The most tax-efficient approach for people who want to leave meaningful wealth to heirs follows a straightforward principle: spend from traditional IRAs during your lifetime and leave tax-free assets to heirs. Converting pre-tax IRA balances to Roth during retirement - particularly during the window between retirement and age 73 when income is typically lower - transforms the most heir-unfriendly asset into the most heir-friendly one. Each dollar converted during a low-income year, taxed at 12% or 22%, becomes a dollar that heirs will receive completely tax-free. For those with taxable brokerage accounts, holding appreciated securities until death rather than selling during life and gifting cash is generally more tax-efficient. The step-up in basis at death eliminates the capital gains entirely. Gifting cash to heirs during life costs nothing additional from a tax perspective, but selling appreciated assets during life to fund gifts triggers capital gains tax that a step-up at death would have eliminated. For life insurance held outside the estate, the death benefit is income-tax-free and, if held in an irrevocable trust, can also escape estate taxes for very large estates. This combination of income-tax-free and estate-tax-free treatment makes properly structured life insurance one of the most powerful wealth transfer tools available. A simple asset allocation for someone focused on inheritance efficiency: spend traditional IRA funds during lifetime, convert remaining traditional IRA to Roth before death, hold appreciated securities in taxable accounts for the step-up, and use life insurance for additional tax-free transfer capacity.

The Estate Tax Consideration for Larger Estates

For most Americans, federal estate taxes are not a concern. In 2026, the federal estate tax exemption is substantial - approximately $13.6 million per individual, or $27.2 million for married couples with proper portability election. Estates below these thresholds owe no federal estate tax regardless of asset type. However, the TCJA doubled the exemption from pre-2018 levels, and current law is scheduled to revert to lower exemptions after 2025 without further legislative action. Depending on what Congress does, the exemption could drop to approximately half its current level - bringing more estates into federal estate tax territory. For those approaching the exemption threshold, the combination of income tax and estate tax on the same assets can be severe. A traditional IRA or 401(k) above the estate exemption can be subject to both income tax on distributions (paid by beneficiaries) and estate tax on the included value (paid by the estate). This double taxation at the margin is known as income in respect of a decedent treatment, and it is one of the most punishing tax outcomes in the entire tax code. For families with large traditional retirement account balances and assets approaching the estate exemption, converting pre-tax accounts to Roth before death reduces the estate value by the tax paid on conversion while also eliminating the future income tax burden on heirs. The conversion tax is paid now, reducing the estate. The heir receives the Roth balance tax-free. The combined effect can be substantially more efficient than leaving a large pre-tax account that faces both estate and income tax.