Inherited IRA Tax Rules: The 10-Year Rule and Other Traps

When you inherit an IRA from a parent or other non-spouse individual, you don't inherit their tax-deferred status. Instead, you inherit a timeline and a set of mandatory withdrawal rules that can create a six-figure tax bill if you misunderstand them. The SECURE Act (2019) and SECURE 2.0 (2022) fundamentally changed how inherited IRAs work for most beneficiaries, replacing the "stretch IRA" strategy with a compressed draindown window. For non-eligible designated beneficiaries—which includes most adult children—that window is 10 years, and the rules around when you must withdraw money are more complex than they first appear.

The 10-Year Deadline Is a Finish Line, Not a Schedule

Under SECURE 2.0, if you inherit a traditional IRA and you are not an eligible designated beneficiary (EDB), all funds must be withdrawn by December 31 of the tenth year following the year of the account owner's death. This is an absolute deadline—miss it, and you owe income tax on the entire remaining balance plus a 25% penalty (the "failure to take RMD" penalty under IRC § 4974(d)).

Critically, this deadline does not mean you can wait nine years and then take everything out in year ten. If the original account owner had already begun taking Required Minimum Distributions (RMDs) before their death, you must continue taking RMDs in years one through nine using a different calculation than the original owner used. If they had not begun RMDs, you have more flexibility—but only if you don't trigger RMDs by accident.

Understanding Eligible vs. Non-Eligible Designated Beneficiaries

The IRS groups beneficiaries into narrow categories. If you inherit an IRA and you are a surviving spouse, you have the most favorable treatment—you can roll the inherited IRA into your own IRA and treat it as if you always owned it. A minor child of the account owner, a person disabled or chronically ill, or a person not more than 10 years younger than the account owner all qualify as eligible designated beneficiaries (EDbs) under SECURE 2.0. EDbs can stretch distributions over their life expectancy and face far gentler RMD calculations.

If you are an adult child inheriting from a parent, you are almost certainly not an EDB. You are a "non-designated beneficiary," which means the 10-year rule applies to you in full. No life expectancy multiplier, no stretch over decades—just a hard ten-year window and potential RMDs during that window if the original owner had begun RMDs.

The Critical Distinction: Death Before vs. After the Owner's RMD Start Date

Whether the account owner had begun taking RMDs before they died is the hinge point that determines your distribution timeline. If death occurred before the owner's required beginning date (RBD)—generally April 1 of the year after they turn 73 under 2025 rules—then you have flexibility. You can take irregular distributions over the ten-year window and pay tax only on what you withdraw. If you don't touch the account for seven years and then liquidate everything in years eight and nine, that's permitted under SECURE 2.0, provided you empty the account by December 31 of year ten.

If the owner had already begun RMDs (or should have), the situation changes. You must take RMDs in years one through nine using the Single Life Expectancy Table. These RMDs are not optional and are typically larger than a pro-rata ten-year withdrawal would be in early years. Failure to take the annual RMD in years one through nine triggers a 25% penalty on the shortfall, regardless of whether you eventually empty the account by year ten.

A Worked Example: Inheriting $380,000 in 2025

Imagine you are 47 years old and inherit a $380,000 traditional IRA from your 78-year-old parent in January 2025. Your parent had already begun RMDs—they had been taking withdrawals for the past two years. Because your parent had begun RMDs before death, you must take RMDs in years one through nine using the Single Life Expectancy Table.

Using the 2025 Single Life Expectancy Table, a beneficiary age 47 has a life expectancy factor of 35.7. Your year-one RMD is $380,000 ÷ 35.7 = $10,644. This is calculated on the account value as of December 31 of 2024 (or the valuation date chosen for inherited IRAs). By December 31 of 2025, you must withdraw $10,644 or face a penalty.

Assuming the account is invested in a balanced portfolio earning 6% annually, by the end of 2025 it has grown to approximately $402,800 (before your $10,644 withdrawal). After you withdraw $10,644, the balance is $392,156. For 2026, you are now 48. The life expectancy factor at age 48 is 34.6, so your 2026 RMD is $392,156 ÷ 34.6 = $11,324. This continues annually, with the denominator shrinking each year.

By the end of year nine (2033), you will have withdrawn roughly $95,000 to $110,000 in cumulative RMDs, assuming the account continues to earn 6% annually. The remaining balance—roughly $320,000 to $340,000—must be liquidated in year ten (2034). Each dollar withdrawn is ordinary income to you. If your ordinary income that year reaches $191,950 (the top of the 24% bracket in 2025, adjusted for inflation), the $340,000 withdrawal could catapult you into the 32% or 35% bracket, resulting in a tax bill of approximately $110,000 to $120,000.

Tax-Bracket Impact and Timing Strategies

The $340,000 year-ten withdrawal in our example creates a major problem: it will almost certainly trigger multi-bracket taxation. If you are married filing jointly with $100,000 in other income, your combined income is already at $440,000. Adding $340,000 pushes you well into the 35% and possibly 37% bracket. Your effective tax rate on that inherited IRA money could exceed 30%.

One underused strategy is to front-load distributions in years one through nine. If your circumstances allow (for example, a sabbatical year or a lower-income year), you can take larger voluntary distributions in those years, spreading the tax bill across multiple brackets and possibly avoiding the worst of year-ten compression. You might withdraw $20,000 in year two and $18,000 in year four, above the RMD, to reduce year ten's balance. You still must take each year's RMD, but any additional distributions are under your control.

• Back-loading distributions into years eight and nine to move money into a lower-income year (if you retire or take unpaid leave)
• Converting a portion of the inherited IRA to a Roth in years one through six, while still taking RMDs, to accelerate tax recognition but lock in lower rates before year-ten compression
• Timing charitable donations in high-income years to offset the inherited IRA distribution's bracket impact

The Roth Conversion Opportunity

Because your inherited IRA is a separate account with its own adjusted gross income (AGI) attribution, a conversion of inherited IRA funds to a Roth IRA in years one through nine is permitted and may be advantageous. Converting inherited traditional IRA funds to a Roth requires you to pay income tax on the converted amount in the year of conversion, but it removes that money from future RMDs and eliminates the need to pay tax on it again in year ten.

In our $380,000 example, if you convert $50,000 to a Roth in 2025 and $50,000 in 2026, you pay tax on those conversions immediately at your marginal rate. But those $100,000 grow tax-free inside the Roth and do not trigger RMDs in years seven through ten. Your year-ten balance is now $240,000 instead of $340,000, reducing the bracket compression. This works best when you have other income (and thus room in lower brackets) to absorb the conversion tax, or when a sabbatical or early-retirement year offers a below-normal income opportunity.

Traps and Penalties to Avoid

The 25% failure-to-take-RMD penalty is now the default for missing an inherited IRA RMD (though reduced to 10% for certain good-cause exceptions under SECURE 2.0's relief provisions). If the account owner had begun RMDs and you miss the year-one RMD of $10,644, the IRS charges 25% of $10,644 = $2,661, in addition to the income tax on any distributions you did take. The penalty is separate from tax and cannot be avoided simply by paying taxes.

Another trap: if the original owner had begun RMDs and died during a year, you still owe the RMD for that year. If your parent died on November 15, 2024, you inherit the IRA at that point, and you must take their 2024 RMD (or what remains of it) by December 31, 2024. If their RMD for 2024 was $12,000 and they had only taken $8,000 before death, you owe the $4,000 balance immediately.

A third trap involves custodial disagreements. Some IRA custodians are slow to process inherited IRA transfers or may misclassify your inherited IRA as a traditional IRA when it should be opened as a separate inherited IRA account. If the funds are commingled with your own IRA, RMD calculations become confused, and penalties may apply. Always insist that your inherited IRA be held in a separate, clearly labeled inherited IRA account, never rolled into your own IRA (unless you are a surviving spouse).

State Income Tax Complications

Federal tax is only half the battle. If you inherit an IRA while living in a high-income-tax state like California, New York, or Oregon, your inherited IRA distributions will be subject to state income tax in addition to federal tax. A $340,000 distribution in California triggers approximately 9.3% to 13.3% state tax, depending on brackets, on top of 30%+ federal tax. This can result in a combined tax rate of 40% or higher.

Some beneficiaries have relocated to lower-tax states specifically to manage inherited IRA withdrawals. If you are considering a move for other reasons (retirement, relocation to a lower cost-of-living area), timing it before large inherited IRA distributions can save tens of thousands. However, the move must be genuine and sustained—temporary relocation for tax purposes can be challenged by state revenue authorities.

Documentation and Record-Keeping

Keep meticulous records of the inherited IRA's opening balance, your annual distributions (including both RMDs and voluntary distributions), and the account value at each year-end. The IRS allows a "reasonable cause" exception to the 25% penalty for certain first-time failures, but only if you can demonstrate that you took reasonable steps to understand the rules and made a good-faith effort to comply. Documentation of your RMD calculations, correspondence with your custodian, and records of distributions are essential if you ever need to request penalty abatement.

File Form 8606 with your tax return if you take any distributions from the inherited IRA, and include detailed schedules showing RMD amounts and actual distributions. Many taxpayers underreport or miss inherited IRA distributions entirely, leading to IRS notices and interest assessments years later. A clean, contemporaneous record eliminates this risk.