You took a $100,000 distribution by check from your 401(k) and are now wondering if the IRS will penalize you. The answer depends on whether you completed the rollover correctly. A check isn’t necessarily problematic, but missing this deadline could cost you roughly $34,000 in taxes and a penalty.
The 60-Day Deadline and What Happens When You Miss It
Once you receive the check, you generally have 60 days to deposit the full distribution into an IRA or another eligible retirement plan. Miss the deadline and the amount may become taxable income for that year. If you’re under 59 ½, a 10% early withdrawal penalty may also apply. 1
Your 401(k) plan generally must withhold 20% for federal taxes when the money is paid directly to you. On a $100,000 distribution, you would receive $80,000. To complete the rollover, you would need to replace the withheld $20,000 from other funds. Otherwise, that portion generally becomes taxable and could face the additional penalty if you’re younger than 59 ½.
The IRS provides several ways to obtain relief from the 60-day requirement in certain circumstances, including some financial institution errors and events beyond your control. Depending on the situation, you may qualify for an automatic waiver, self-certification or a private letter ruling.
How Much You Could Owe If You Fail to Comply
The tax cost depends on your other income. For example, if you are a single filer with $100,000 in taxable income before taking the distribution, missing the deadline would raise that amount to $200,000. The table below breaks down how much you could owe based on 2026 tax brackets. 2
| Tax Bracket | Income Range | Amount in Bracket | Tax Rate | Tax Owed |
|---|---|---|---|---|
| 10% | $0–$12,400 | $12,400 | 10% | $1,240 |
| 12% | $12,400–$50,400 | $38,000 | 12% | $4,560 |
| 22% | $50,400–$105,700 | $55,300 | 22% | $12,166 |
| 24% | $105,700+ | $94,300 | 24% | $22,632 |
| Total federal income tax on $200,000 | — | — | — | $40,598 |
The $40,598 total includes federal income tax on both your original $100,000 of taxable income and the additional $100,000 distribution.
To isolate the rollover’s impact, your first $100,000 would generate $16,712 in federal income tax, while increasing taxable income to $200,000 would raise the bill to $40,598. That means the distribution itself adds $23,886.
If you’re under age 59 ½, you could also face a 10% early withdrawal penalty on the $100,000 distribution unless an exception applies.
| Additional Cost | Calculation |
|---|---|
| Additional federal income tax from distribution | $23,886 |
| 10% early withdrawal penalty | $100,000 × 10% = $10,000 |
| Total additional federal cost | $33,886 |
That would add $10,000, bringing the potential cost associated with the failed rollover to $33,886. If you need help estimating the tax impact of a 401(k) rollover, a financial advisor can help you evaluate how the distribution may affect your overall tax bill.
How to Avoid Costly Rollover Mistakes
A direct rollover is generally the safest option because the funds move from your 401(k) directly to another eligible retirement plan or IRA. That means the mandatory 20% withholding does not apply, and the 60-day deadline for an indirect rollover is avoided.
If you must complete an indirect rollover, keep careful track of the deadline and make sure you have enough cash available to replace any amount withheld for taxes. Taking these steps can help preserve the tax-deferred status of your retirement savings and reduce the risk of unexpected taxes or penalties.
A financial advisor can help you avoid costly rollover mistakes by reviewing deadlines, tax rules and transfer requirements before you move your retirement savings.
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