Cashing out an inherited retirement account in a single year is one of the most expensive tax mistakes a beneficiary can make, and it happens constantly because the IRS withholding at the time of distribution gives no warning about what the actual bill will be.
A recent thread on Reddit’s r/personalfinance laid out the damage in precise numbers. A beneficiary inherited their father’s retirement accounts and cashed everything out at once. The custodian withheld only 10%, about $23,000. The actual tax owed came to roughly $50,000 total, leaving an unexpected $32,000 balance due at filing. The reason: the full inherited amount stacked on top of a $60,000 annual salary, pushing total taxable income to roughly $290,000 for the year and into a much higher bracket than the beneficiary had ever occupied.
The U.S. tax system is progressive. When a large inherited IRA distribution lands in a single tax year, it does not get taxed at your normal rate. It gets taxed at whatever bracket that combined income reaches.
Under 2026 federal income tax brackets, a single filer earning $60,000 sits in the 22% bracket. Add a six-figure lump-sum distribution from inherited retirement accounts and that same person crosses into the 32% or 35% range on the portion above roughly $105,700. The effective rate on the inherited money alone can easily run 30% or higher.
The 10% withholding that custodians often apply by default reflects a baseline election, not a tax estimate. It reflects a baseline withholding election, not a calculation of the taxpayer’s actual marginal rate. The IRS expects the taxpayer to know their own bracket and pay accordingly, either through quarterly estimated payments or by adjusting withholding at the time of distribution.
The SECURE Act, passed in 2019, eliminated the old “stretch IRA” strategy for most non-spouse beneficiaries and replaced it with a 10-year rule. Under this rule, the entire inherited account balance must be distributed by the end of the 10th year after the original owner’s death. There are no required annual minimums for most non-spouse beneficiaries, which means the beneficiary controls the timing.
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A beneficiary who spreads withdrawals evenly across 10 years keeps each annual distribution small enough to stay in a lower bracket. Someone inheriting $230,000 who takes $23,000 per year adds only a modest amount to their taxable income each year. Someone who takes all $230,000 at once on top of a $60,000 salary faces a combined income that triggers rates designed for high earners. Spreading the same dollars over a decade can save $40,000 or more in federal taxes alone, depending on the account size and the beneficiary’s other income.
Illustrative example based on the Reddit scenario. Actual tax will vary by filing status, deductions, and state taxes.
A second failure mode receives far less attention: what happens when no beneficiary is named on the account at all. A CPA commenting on the Reddit thread noted that if no beneficiary was named, the money flows through the estate rather than directly to an individual. When an IRA passes through an estate, the beneficiary typically cannot open an inherited IRA and spread distributions. The entire balance must be distributed according to the estate’s timeline, often within five years, and the income is taxed at estate tax rates, which reach 37% at the top bracket.
This single administrative oversight, failing to name or update a beneficiary, can eliminate the 10-year distribution option entirely. Retirement accounts pass by beneficiary designation, not by will.
Open an inherited IRA and spread withdrawals over 10 years. This is the right move for most non-spouse beneficiaries with other income. It keeps annual distributions small, preserves tax-deferred growth on the remaining balance, and lets the beneficiary time withdrawals around lower-income years.
Take larger withdrawals in low-income years. If the beneficiary expects lower income in certain years, pulling more from the inherited IRA in those years and less in high-income years reduces the overall tax bill. The 10-year rule does not require equal distributions, only that the account is emptied by year 10.
Lump-sum withdrawal. Rarely optimal. The only scenario where this makes sense is if the inherited account is very small and the tax impact is negligible, or if the beneficiary is in an unusually low tax year. For any account above roughly $20,000 held by someone with meaningful other income, the lump-sum approach will almost always cost more in taxes than spreading distributions.
If you have recently inherited a retirement account and have not yet taken a distribution, contact the custodian immediately to understand whether a beneficiary designation was on file. If it was, you likely have the option to open an inherited IRA and begin planning your 10-year distribution schedule. If it was not, you need a CPA before you do anything else.
Community feedback in the Reddit thread emphasized that a CPA can explain the reasoning behind tax calculations and guide strategy, while a basic preparer may simply present the number without context. For a situation involving a large inherited retirement account, that difference in guidance can be worth tens of thousands of dollars.
Withholding is not a proxy for tax owed. A custodian withholding 10% on a large distribution reflects a default election, not your actual marginal rate. Adjust withholding to match your actual expected bracket, or make estimated payments, before the bill arrives in April.
Finally, check your own beneficiary designations today. Spending 10 minutes with your custodian to confirm your designations is the cheapest estate planning move available.
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