The Sept. 15, 2026, estimated tax deadline has passed, and retirees who withdrew a large sum from a traditional Individual Retirement Account (IRA) this summer without sufficient federal withholding may now face a penalty that accrues weekly.
The standard 10% default withholding rate on IRA distributions often does not cover the full tax liability on a substantial withdrawal. The estimated payment, which should have bridged the gap, was not made, as confirmed by IRS Publication 505.
The IRS adjusts the underpayment penalty rate quarterly, linking it to the federal short-term rate plus three percentage points. This rate has been 7% annualized for the first, third, and fourth quarters of 2026, with a dip to 6% in the second quarter.
Section 6654(g)(1) of the Internal Revenue Code establishes a distinct difference in how the IRS credits estimated payments versus withholding from retirement distributions, creating a limited opportunity for retirees to take action before the end of the year.
How federal withholding retroactively covers earlier quarters
Estimated tax payments are credited on the date the IRS receives them, and each payment only applies to the installment period in which it is received, according to IRS Publication 505. This means that subsequent payments cannot eliminate penalties that have already begun to accrue from prior quarters.
Federal income tax withheld from pensions, Social Security, and retirement distributions falls under a different provision. The IRS treats this withholding as if it were paid evenly throughout all four installment periods, irrespective of when the funds were collected, as stated in IRS Publication 505.
A retiree can contact their IRA custodian, request a new distribution before December 31, and direct a significant portion to federal withholding. This action allows that payment to be retroactively applied against the underpaid first-, second-, and third-quarter installments in a single transaction, as reported by 24/7 Wall St.
The distribution itself is taxable, so the withholding amount must cover both the initial shortfall and the new tax generated by the withdrawal.
Only traditional IRA, 401(k), and pension balances are eligible, as Roth IRA distributions do not generate taxable income and therefore no withholding, according to IRS Publication 505.
Ed Slott explains why withholding is more effective than estimated payments late in the year
IRS Publication 505 confirms that the penalty is waived if withholding and timely estimated payments collectively equal at least 90% of the current year's tax liability or 100% of the prior year's tax liability.
Taxpayers whose prior-year adjusted gross income (AGI) exceeded $150,000 (or $75,000 if married filing separately) must meet a higher threshold of 110% to avoid the penalty.
Tax professionals consider the withholding provision a highly effective strategy for retirees managing variable income. Quarterly liabilities from retirement account withdrawals that carry penalty exposure can shift between periods in ways the estimated payment system was not designed to handle.
Ed Slott, a CPA and founder of Ed Slott and Company, told Morningstar that the withholding method offers retirees a timing advantage that no catch-up payment can match, because the IRS applies the credit across the entire calendar year, regardless of when the distribution occurs.
"That money, even though he was holding onto it the whole year almost, is treated as having been paid in equally throughout the year, even though he held onto the money, even though it was in December. That's the advantage because if you do the estimates, you must hit those quarterly estimates."
Slott's advice is particularly relevant for retirees facing a third-quarter shortfall, as the fourth-quarter estimated payment, due January 15, 2027, cannot retroactively cover earlier periods but only stops the penalty accrual from that date forward.
What the distribution request entails before year-end
To implement this solution, retirees must contact their IRA custodian to request a new distribution, specifying a federal withholding percentage on IRS Form W-4R. This form allows for any withholding rate between 0% and 100%. Some custodians handle this request electronically, while others require a signed form.
The calculation involves determining the total federal tax liability for the year, subtracting any withholding already collected, and ensuring the year-end distribution covers the remaining amount.
The prior-year safe harbor is often a more practical target because the amount is already fixed on the filed 2025 tax return, as confirmed by IRS Publication 505.
Retirees aged 73 or older can incorporate this strategy into their required minimum distribution (RMD) by increasing the withholding percentage on the mandatory withdrawal.
This approach also benefits retirees whose diversified retirement income has pushed them into higher tax brackets, causing their withholding to fall behind.
State estimated tax rules operate separately, and the quarterly credit distinction that makes this strategy effective at the federal level does not resolve a state-level shortfall.
What happens after the December deadline
Once December 31 passes, the 2026 tax year concludes, and the opportunity to use withholding as a retroactive credit is permanently closed, according to IRS Publication 505. Any remaining quarterly shortfall will be treated as a fixed penalty when the tax return is filed in April.
If year-end withholding brings the total tax payments above the applicable safe harbor threshold, the taxpayer is not subject to the underpayment penalty and is not required to file Form 2210 (the IRS worksheet for calculating quarterly shortfalls) with their return, the publication states.
This withholding strategy is available to retirees aged 59½ and older with pre-tax retirement account balances.
Withdrawals made before this age are subject to a separate 10% early withdrawal penalty on the gross amount, which typically negates the benefit of this strategy, as confirmed by IRS Publication 505.
