Deemed Payment Dates: When the IRS Says Your Withholding Was Paid

Ask most people when they paid their taxes and they will say every payday, because that is when the withholding came out. For refund purposes, the law disagrees. Section 6513 of the Internal Revenue Code sets deemed dates for when returns are filed and taxes are paid, and those deemed dates, not the actual paydays, decide whether a refund claim can reach the money.

This is the most technical page in the refund series, and it is the one that explains most of the others. If you understand deemed dates, the lookback rule and the late return trap stop being mysterious.

Early returns and early payments

Section 6513(a) starts with two rules for the refund statute in section 6511. First, any return filed before the last day prescribed for filing is considered filed on that last day. Second, for purposes of the lookback limits in sections 6511(b)(2) and (c) and section 6512, payment of any portion of the tax made before the last day prescribed for payment is considered made on that last day.

Both rules are applied without regard to any extension of time and without regard to any election to pay in installments. The due date means the original due date.

The effect is that an early filer and an on-time filer start the refund clock on the same day, and early payments line up on the due date too.

Withholding

Section 6513(b)(1) says tax actually deducted and withheld at the source during a calendar year under chapter 24, which is income tax withholding on wages, is deemed paid by the recipient on the fifteenth day of the fourth month following the close of the taxable year with respect to which the tax is allowable as a credit under section 31.

For a calendar-year individual, that is the April due date of the following year. Every dollar withheld from every paycheck in the year is treated as paid on that single day.

Section 6513(b)(3) applies a similar rule to tax withheld at the source under chapters 3 and 4, the withholding regimes for certain payments to foreign persons: it is deemed paid on the last day prescribed for filing the return, determined without extensions, and any filing exemption is disregarded for this purpose.

Estimated tax

Section 6513(b)(2) says any amount paid as estimated income tax for a taxable year is deemed paid on the last day prescribed for filing the return under section 6012 for that year, determined without regard to any extension of time.

Again, the original due date. An estimated payment made in June of the tax year and one made in January of the following year are both treated as paid on the return due date.

Overpayments credited forward

Many people elect to apply an overpayment to next year's estimated tax instead of taking a refund. Section 6513(d) says that when an overpayment is claimed as a credit against estimated tax for the succeeding year, the amount is considered a payment of income tax for the succeeding year, whether or not it is claimed as a credit on the estimated tax return for that year, and no claim for credit or refund of the overpayment is allowed for the year in which it arose.

Treasury Regulation 301.6402-3(d) adds that once a taxpayer elects to have an overpayment refunded, the taxpayer may not later change the election to apply it to estimated tax. And section 301.6402-3(a)(5) treats an election on the return to apply an overpayment to estimated tax as binding for that portion.

The practical point: money credited forward becomes a payment in the next year, and any later refund question about it is a question about the next year, with that year's deemed dates.

Payroll and unemployment taxes

Employers have their own deemed dates. Section 6513(c) provides that for taxes under chapters 3, 4, 21 and 24, a return for any period ending with or within a calendar year filed before April 15 of the succeeding year is considered filed on that April 15, and tax paid before April 15 of the succeeding year for remuneration paid during the year is considered paid on that April 15.

Section 6513(e) treats federal unemployment tax deposits made for periods within a calendar year as made on the last day prescribed for filing the annual return, determined without extensions, if made before that day. The guide to payroll tax statutes covers the assessment side of the same rule.

Why deemed dates matter so much

The refund statute has two parts: a deadline to file the claim and a cap on how much can be recovered. Deemed dates drive both.

On the deadline, section 6511(a) runs three years from the filing of the return or two years from payment. A return filed early is treated as filed on the due date, so the three years run from the due date. Payments are treated as made on the due date, so the two years run from then too for those payments.

On the cap, section 6511(b)(2) limits the refund to tax paid within a window before the claim. Because withholding and estimated payments are all deemed paid on the due date, the whole question becomes whether the window reaches back to that one date. If it does, everything withheld or estimated for the year is inside. If it does not, all of it is outside.

That all-or-nothing effect is why a late original return filed just over three years after the due date can lose the entire refund, as explained in the guide to late returns that claim refunds.

Later payments are different

Deemed dates apply to withholding, estimated tax and payments made before the due date. Payments made after the due date, such as a balance paid with a late return, an audit deficiency paid later or a levy, are generally treated as paid when actually paid.

That creates a mix in many cases: a deemed-date bucket for the prepaid amounts and actual-date payments for everything else. When you test a refund claim against the lookback, list each payment with the date the law assigns to it. The refund claim deadline guide explains how the two-year rule can keep a claim alive for later payments even after the three-year period has passed.

A worksheet approach

When I review a refund question, I build a simple table before anything else. One column lists every payment for the year. The next column lists the date the law assigns to it: the deemed date for withholding and estimated tax, the due date for anything paid early and the actual date for anything paid late. The last column marks whether the payment falls inside the lookback window for the claim as filed, or as it could be filed today.

That table answers most refund questions in minutes. It shows whether a claim filed now can still reach the withholding, whether only later payments remain recoverable and how much time is left before the next payment ages out. It also shows when the honest answer is that nothing can be recovered, which is better to know before anyone spends money preparing a claim.

The bottom line

For refund purposes, IRC 6513 treats early returns as filed on the due date, early payments as made on the due date, wage withholding as paid on the fifteenth day of the fourth month after year end and estimated tax as paid on the return due date, all without extensions. Payroll taxes use April 15 of the following year. Overpayments credited forward become next year's payments.

Before you assume a refund claim is safe, translate every payment into its deemed date. The calendar the law uses is not the one in your checkbook.