quick read
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The Required Minimum Distribution (RMD) of $37,000 can trigger a “tax torpedo,” leading to about 85% of Social Security benefits becoming part of taxable income, which could elevate your effective marginal tax rate to around 41%.
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Withdrawing each extra dollar from an IRA may generate $1.85 in taxable income, nearly doubling the 22% tax bracket rate, pushing it to over 40%.
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Utilizing qualified charitable distributions, intermediary cost-based distributions, and Roth conversions before age 73 can help mitigate this situation.
A situation arises that most retirees do not expect.
Imagine a 73-year-old single retiree who receives $30,000 annually from Social Security, possesses $980,000 in a traditional IRA, and has an additional $250,000 in a brokerage account. She seems to be in a solid financial position on the surface.
However, at 73, she must start withdrawing from her traditional IRA, impacting her tax situation significantly.
This scenario often arises in retirement discussions, especially in spring. Many find that their detailed tax planning doesn’t shield them from unexpectedly high federal tax bills, which exceed the anticipated 12%.
Where does 40% come from?
The IRS Uniform Lifetime Table states that the IRA balance is divided by 26.5 when one turns 73. Therefore, with $980,000, her first RMD would be about $36,981.
This distribution increases her ordinary income, drawing Social Security into the taxable bracket. If a single filer’s provisional income surpasses $34,000, up to 85% of their benefits become taxable. In this case, her provisional income reaches nearly $52,000, so around $25,500 of her Social Security would count as taxable income.
When adding IRA distributions to taxable Social Security and deducting the standard deduction of $18,150 for single filers over 65 in 2026, her taxable income approaches $44,331, resulting in about $5,072 in federal taxes, all within the lowest tax bracket.
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The next dollar withdrawal exacerbates the situation. For every dollar withdrawn from the IRA, $0.85 of Social Security gets deducted from taxable income, compounding the taxable income increase to $1.85. If she falls into the 22% bracket starting from $50,400 in single taxable income in 2026, this format leads to an effective marginal tax rate of roughly 40.7%.
It’s a tax torpedo, and her initial RMD puts her right in its line of fire.
how the other parts are connected
There are external factors increasing her financial strain. With the federal funds rate at 3.75% and the 10-year Treasury yield near 4.49%, the cash and bonds in her brokerage don’t account for the taxable interest when determining provisional income. Additionally, the Medicare Income-Related Monthly Adjustment Amount (IRMAA) surcharge begins at a Modified Adjusted Gross Income (MAGI) of $109,000, where even a small excess can add over $1,000 to Part B and Part D premiums annually.
The three most important tools:
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Qualified Charitable Distributions. Direct transfers from an IRA to a qualifying charity satisfy RMDs without impacting adjusted gross income. This is an effective way to meet requirements without additional tax consequences.
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Intermediary base and step-up at death. To avoid generating regular income through RMDs, funds can be allocated to a brokerage or by holding appreciated stocks for heirs to benefit from an increased basis.
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Roth conversion with pre-73 brackets in mind. Utilizing a Roth conversion can significantly counteract the tax torpedo, as each converted dollar now won’t appear in future RMDs.
What do you get from this?
One of the biggest pitfalls is mistaking the IRS’s table as a definitive guide for tax rates. For retirees accessing Social Security while managing a traditional IRA, the effective marginal tax rate on subsequent withdrawals can often be nearly twice the stated rate.
Before making major withdrawals, harvesting gains, or doing a Roth conversion, it’s wise to model how these decisions might affect current income, Medicare surcharge levels, and next year’s income. This has been highlighted in discussions, showing that the source of withdrawals can significantly alter outcomes. Tax professionals usually earn their fee during that initial consultation by running the numbers both ways.
Be careful if you are thinking of retiring
Planning for retirement doesn’t have to feel overwhelming. Gaining the right advice is crucial, and SmartAsset has simplified the process of connecting with vetted financial advisors. Here’s how:
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