Inherit a $600,000 IRA the Same Year Your Own RMDs Start at 73, and Two Required Withdrawals Land on One Return. About $85,000 of Forced Income Pushes a Couple Into the 24% Bracket and Over Medicare’s Line, and Here’s How Advisors Sequence the Two Clocks
When a $600,000 inherited IRA lands in the same year your own mandatory withdrawals begin, two separate tax clocks start ticking at once, and the collision can push a comfortable retirement budget into bracket territory most couples spent years trying…
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He turned 73 in 2026, the year his own required minimum distributions were set to begin. In late 2025 his mother died, leaving him her traditional IRA, worth $600,000 at year-end. She had been taking RMDs for two decades.
He and his wife, both on Medicare, had built their budget around a regular $165,000 of pension, Social Security and investment income in adjusted gross income. That kept them in the 22% bracket and under Medicare’s surcharge line. Then two custodian letters arrived. One covered the RMD on his $1,300,000 IRA, the other the RMD on the inherited account, and both were due by December 31.
Together those withdrawals add $85,642 to one joint return. That drives the couple into the 24% bracket and over Medicare’s income line.
Two Distribution Clocks Start in the Same Calendar Year
The first deadline is his own. Under SECURE 2.0, anyone born on or after January 1, 1951 has a required beginning date tied to age 73. His divisor comes from the IRS Uniform Lifetime Table: 26.5 at age 73.
The second deadline is his mother’s. Eligible designated beneficiaries include anyone not more than 10 years younger than the IRA owner. He is a generation younger, so he falls under the SECURE Act 10-year rule, and the account must be drawn down within 10 years of the death of the owner, which means by December 31, 2035. She died after her required beginning date, so he also owes annual withdrawals until then. IRS Publication 590-B bases those on the longer of his single life expectancy or hers. At 73, his single-life factor is 16.4.
Missing either withdrawal triggers a tax equal to 25% of the shortfall under Internal Revenue Code Section 4974(a).
How $85,642 of Forced Income Lands on One Return
| Account | Balance | Divisor | 2026 RMD |
|---|---|---|---|
| His own IRA | $1,300,000 | 26.5 | $49,057 |
| Inherited IRA | $600,000 | 16.4 | $36,585 |
| Total forced income | $85,642 |
Stack that on the baseline and AGI hits $250,642. After the 2026 joint standard deduction of $32,200, taxable income is $218,442. Without the RMDs it would have been $132,800.
The 24% rate applies to joint income over $211,400, so the top piece of the RMD stack is taxed at 24% and the rest at 22%. Federal tax on the forced income comes to $18,982.08. The extra standard deduction for taxpayers 65 and older reduces a little off that total but still leaves them in the 24% bracket.
Medicare reads income with a lag. Your 2026 income determines your 2028 surcharge. At 2026 thresholds, joint MAGI over $218,000 adds $81.20 a month to Part B and $14.50 to Part D for each participant. For the two of them, that is $2,296.80 a year. This two-year lag is one of nine IRS rules that slowly drain retirement accounts, and we detailed the rest in a free guide here.
A $35,000 Charity Transfer Pulls Them Back Under the Line
Advisors coordinate the two deadline by controlling how each dollar leaves the accounts. For a couple that gives to charity, the best tool is the qualified charitable distribution. Section 408(d)(8) lets an IRA owner age 70½ or older send money straight from the IRA to a charity and leave it out of gross income, up to an annual cap set at $100,000 and indexed for inflation. A QCD also counts toward his own RMD.
Say the couple already writes checks to charity totaling $35,000 a year. If that same $35,000 goes from his IRA directly to the charities, AGI drops to $215,642, which is under the Medicare line. Taxable income falls to $183,442, all of it in the 22% bracket. Tax on the remaining forced income is $11,141.24, and the surcharge goes away. Compared with the original path, the household keeps $10,137.64.
The second factor is timing. Owners can take their first RMD as late as April 1 of the year following the year you attain age 73. Waiting cuts 2026 AGI to $201,585, but 2027 then carries two of his own RMDs plus the inherited one. Advisors reserve that delay for years when the current one is unusually heavy.
The third factor is the inherited account’s runway. The annual RMD is only a floor. In years when income already falls inside a surcharge level, taking extra up to the top of that level spreads out the balance before 2035 forces it all out at once.
Five Moves to Make Before December 31
- Get written confirmation from the inherited IRA custodian that the original owner had passed her required beginning date, and ask which life expectancy factor it applies.
- Pull the prior December 31 balance for each account and calculate each RMD separately. The inherited RMD must come out of the inherited account.
- Project 2026 MAGI against the $218,000 joint line before taking the final withdrawal.
- Request QCDs as direct transfers from the IRA trustee to the charity, which Section 408(d)(8)(B)(i) requires.
- Map the inherited balance across every year through 2035, and review the plan with a CPA before the year ends.
The key figure to remember is $218,000. When two RMD deadline start in the same year, every dollar kept under that line through a charity transfer or careful timing protects both the 22% bracket and the Medicare premium.
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Vilma Rios is a tax professional and tax content contributor with more than 15 years of experience in tax and accounting. She specializes in federal tax research, tax education, and translating complex tax rules into clear, practical information for individuals, families, and small-business owners.
Vilma is a Content Tax Contributor II with the National Association of Tax Professionals (NATP), where she contributes to tax education and professional content. She has also presented tax information through webinars, including Spanish-language tax education, and has appeared on Telemundo 47 discussing tax topics and helping viewers understand important tax-filing requirements.
Her experience also includes tax and accounting work, tax research, IRS-related matters, and public tax education. While in college, Vilma volunteered in an IRS-sponsored tax assistance program and was recognized for her community service by local and state officials.
Known as “Your Tax Geek,” Vilma is passionate about making taxes easier to understand and helping people navigate an increasingly complex tax system.
