The consequences of a single rollover mistake can be devastating. A 59-year-old engineer from Illinois learned this lesson the hard way in 2026 when he attempted to move $275,000 between his IRAs. The mistake: he made a second indirect rollover within 12 months, violating the once-per-year rule he didn’t fully understand. The bill: $94,000 in combined federal income taxes and early withdrawal penalties—wiping out roughly one-third of the amount he tried to move. His case is not unique.
Rollover errors remain among the costliest mistakes retirement savers make, and in 2026, the stakes have gotten higher. The numbers are, in fact, worse than most people think. Retirement account rollovers appear straightforward on the surface—move money from one account to another, preserve your tax-deferred status, and carry on. But the IRS rules surrounding rollovers are intricate, full of traps that even careful savers fail to see coming. Violate a single rule, miss a deadline by one day, or misunderstand what “once per year” actually means, and you face potential tax bills in the tens of thousands of dollars. With 2026 contribution limits climbing higher than ever before, more retirees are moving larger sums, which means larger mistakes and larger penalties.
Table of Contents
- Is Your IRA Rollover Subject to the Once-Per-Year Rule?
- The 20% Withholding Trap That Costs You Money Twice
- The 60-Day Deadline: One Day Late Means Full Taxation
- The Company Stock Mistake That You Can Never Fix
- Indirect Rollovers vs. Direct Rollovers: The Safety Gap
- 2026 Contribution Limits and Changing Retirement Economics
- Planning Your Rollover: What to Know Before You Act
- Conclusion
Is Your IRA Rollover Subject to the Once-Per-Year Rule?
The once-per-year rule is the most frequently misunderstood rollover restriction, and misunderstanding it directly caused the Illinois engineer’s $94,000 bill. The rule states that you can make only one indirect rollover every 12 months—but not per account. This is crucial: the limit applies across all your IRAs combined, not separately to each account you own. If you have three IRAs and you roll over from IRA #1 to another account, you cannot roll over from IRA #2 or IRA #3 to any other account for the next 12 months. Many savers incorrectly assume the one-per-year rule applies separately to each of their IRAs, believing they can perform one rollover per account per year. This misconception can cost tens of thousands in unexpected taxes.
The once-per-year rule applies only to indirect rollovers—also called 60-day rollovers—where you receive a check in your name and you personally deposit it into the new account. If you make multiple indirect rollovers within 12 months across any of your IRAs, the second (and any subsequent) rollovers are treated as taxable distributions, and if you’re under age 59½, they’re subject to a 10% early withdrawal penalty on top of ordinary income taxes. In the Illinois case, the engineer’s violation triggered both the full income tax on the $275,000 plus the 10% early withdrawal penalty, totaling $94,000 in additional taxes he was not expecting. Direct rollovers, by contrast, bypass this rule entirely. When funds are transferred directly from one plan administrator to another without passing through your hands, the once-per-year limit does not apply. You can execute as many direct rollovers as you need, which is one reason financial advisors increasingly recommend direct transfers over indirect rollovers.
The 20% Withholding Trap That Costs You Money Twice
One of the cruelest features of indirect rollovers is the 20% mandatory withholding. When your employer or ira custodian issues you a check during an indirect rollover, they are required by law to withhold 20% of the distribution for federal income taxes. If you’re rolling over $100,000, you receive a check for $80,000, and $20,000 is automatically withheld. The withholding is sent to the IRS as a payment against your tax liability for that year. Here’s the trap: to avoid paying taxes on the full amount you wanted to roll over, you must deposit the entire amount—including the $20,000 that was withheld—into the new account within 60 days. The withheld amount is not returned to you.
You must use your own cash to cover the 20% gap if you want to roll over the full balance and avoid taxes. If you only deposit the $80,000 check you received, the IRS treats the $20,000 withholding as a taxable distribution, not a rollover. You pay income tax on $100,000 even though you only received $80,000 in your hand. This creates a hidden cost for many savers. You need $20,000 in outside cash available immediately to avoid a tax bill on money that should have been tax-deferred. If you don’t have that $20,000 sitting in a savings account, you face a choice: raid a savings account and lose three months of compound growth on $20,000, or accept a tax bill on money you intended to roll over. Direct rollovers eliminate this problem entirely because the withholding requirement doesn’t apply when funds move directly from plan to plan.
The 60-Day Deadline: One Day Late Means Full Taxation
The 60-day deadline for completing an indirect rollover is absolute. The IRS allows you exactly 60 days from the date you receive a distribution check to deposit the funds into a new qualified retirement account. Miss the deadline by even one day, and the entire distribution becomes taxable income for that year. If you’re under age 59½, add a 10% early withdrawal penalty on top. The math is unforgiving.
A 55-year-old who receives a $250,000 distribution check on January 15 has until March 15 to deposit the funds. If the deposit clears on March 16, the entire $250,000 becomes taxable income, generating approximately $75,000 in federal income tax (at a 30% combined rate) plus $25,000 in early withdrawal penalties—a total bill of $100,000 on money that should have been tax-deferred. Even seemingly minor delays—a check that takes longer to clear, a custodian that takes extra time processing the incoming deposit, a mailing delay—can push you past the deadline. The IRS has shown some limited flexibility in specific hardship situations, but counting on an exception is dangerous. Your best protection is to request a direct rollover instead of an indirect one. Direct rollovers have no 60-day deadline and no early withdrawal penalty, making them categorically safer for retirement funds in motion.
The Company Stock Mistake That You Can Never Fix
If your 401(k) holds company stock and you roll over that stock into an IRA, you lose access to a valuable tax planning strategy called Net Unrealized Appreciation (NUA). This mistake is particularly costly for employees of companies whose stock has appreciated significantly during their tenure. Here’s how NUA works: when you separate from service, you can distribute company stock from your 401(k) at cost basis (the original value of the shares when they were bought or granted). You pay ordinary income tax only on the cost basis, not on the appreciation. When you sell the stock later, any gains above the cost basis receive capital gains treatment, which is typically taxed at a lower rate than ordinary income.
For an employee who received $100,000 in company stock that has grown to $500,000, the NUA strategy can save tens of thousands in taxes. Once you roll over company stock into an IRA, you can never reclaim this benefit. IRAs don’t allow NUA treatment; all distributions from an IRA are taxed as ordinary income, regardless of whether the money came from company stock appreciation. You’ve converted a capital gains opportunity into ordinary income. For employees of successful companies with significant stock appreciation, this mistake is often worth $50,000 to $200,000 or more in lifetime tax savings foregone. The decision to roll over company stock should always involve consultation with a tax professional who can calculate whether NUA treatment would be more valuable than the flexibility of an IRA.
Indirect Rollovers vs. Direct Rollovers: The Safety Gap
The fundamental choice in any rollover decision is between an indirect rollover (where you handle the check) and a direct rollover (where the institutions handle the transfer). The difference in safety is enormous. Indirect rollovers trigger the once-per-year rule, the 20% withholding requirement, the 60-day deadline, and the risk of early withdrawal penalties. Direct rollovers trigger none of these risks. In a direct rollover, you instruct your current plan (your 401(k), 403(b), or IRA) to transfer funds directly to your new IRA or employer plan. The money moves from account to account without passing through your hands. There is no check issued in your name.
There is no withholding. There is no 60-day deadline. There is no once-per-year restriction. The transfer is treated as a non-taxable rollover from the moment the funds leave the old account. If you need to move money between retirement accounts, direct rollovers should be your default choice unless you have a specific reason to do otherwise. The only scenario where an indirect rollover might be preferable is if you need access to the money temporarily and plan to repay it within 60 days—for example, if you need short-term liquidity and you’re confident you can deposit the funds back into a qualified plan before the deadline. Even then, the risks are substantial, and most financial advisors recommend treating this as a loan from your own cash rather than from retirement accounts.
2026 Contribution Limits and Changing Retirement Economics
The IRS adjusted retirement account contribution limits upward for 2026, raising the 401(k) contribution limit to $24,500 and the IRA contribution limit to $7,500. These increases reflect inflation adjustments and also signal that more retirees will be moving larger sums during rollovers. A larger account balance means that a single mistake scales proportionally—a 1% error on a $500,000 rollover costs $5,000, while the same percentage error on a $1 million rollover costs $10,000.
With higher contribution limits and market gains increasing account balances, savers need to be more careful, not less. The absolute dollar value of mistakes is climbing. A once-per-year rule violation that might have cost $30,000 five years ago now costs $60,000 or more because account balances are substantially larger. The 2026 rule changes underline why professional guidance during a rollover has become more valuable than ever.
Planning Your Rollover: What to Know Before You Act
If you’re considering a rollover, the safest approach is to request a direct rollover in writing from your current plan administrator. Specify the receiving institution’s name and account information, and let the institutions handle the transfer. Avoid taking possession of the check. If your situation involves company stock, consult a tax professional before rolling over to understand whether NUA treatment would be more valuable than the flexibility of an IRA.
Review your complete rollover history for the past 12 months before initiating an indirect rollover. If you’ve already completed one indirect rollover in the current 12-month period, you cannot execute another without triggering full taxation and penalties. Document the date of any distribution check you receive and ensure you understand your 60-day deadline. Set a calendar reminder for day 55 if you must complete an indirect rollover, giving yourself a five-day buffer to ensure the deposit clears by the deadline. When working with custodians, confirm in writing that they understand your deadline and will prioritize the incoming deposit.
Conclusion
Rollover mistakes in 2026 are costly and increasingly common because account balances are larger, rules are complex, and the gap between a correct rollover and a wrong one is measured in tens of thousands of dollars. The Illinois engineer’s $94,000 bill was not the result of fraud or negligence—it was the result of a honest misunderstanding about how the once-per-year rule works. His mistake is entirely preventable, yet thousands of savers make similar errors every year.
The path forward is clear: use direct rollovers whenever possible, understand the once-per-year rule in its full scope across all your accounts, and consult a tax professional before rolling over company stock or executing an indirect rollover. Your retirement savings have taken decades to accumulate. A 30-minute conversation with a financial advisor or tax professional before a rollover can prevent six-figure mistakes that take years of additional work to recover from.