The trust fund recovery penalty on backup withholding: who pays when the business does not

Why backup withholding is trust fund money

The statute puts the payer in the position of a withholding agent: "Payors will be held liable for the payment of any backup withholding required to be deducted and withheld under IRC 3406 per IRC 3403," and backup withholding "is treated as withholding on wages per IRC 3406(h)(10)" (IRM 4.23.8.14, Apr. 17, 2024). Withheld tax is held in trust for the United States under IRC 7501, and IRC 6672 provides that any person "required to collect, truthfully account for, and pay over" such tax who willfully fails to do so is liable for a penalty "equal to the total amount of the tax." That is the trust fund recovery penalty, and the examination manual says in one line what this guide spells out: "Backup withholding adjustments are subject to IRC 6672" (IRM 4.23.8.14).

Two things follow for a payer. The amount a business should have withheld from vendors with missing or incorrect TINs is not a corporate debt that ends with the corporation; it can be assessed against individuals. And the people exposed are not limited to owners. The examination guide and the compliance-check guide cover how the Form 945 balance is created; this guide covers what happens to it when the business does not pay.

One hundred percent of the tax

The difference from payroll is the whole point. On a Form 941 the trust fund portion is the employee's share: income tax withheld plus the employee half of FICA, which is roughly 60% to 70% of the quarter's total tax. On a Form 945 there is no employer share; everything on the return was taken from someone else's payment. So where a payroll officer faces a penalty for part of the 941 balance, a payer's responsible persons face a penalty for all of the 945 balance, whether it came from the payer's own return, a Letter 6112 compliance check or a Form 4668-B examination report.

The computation runs on the Automated Trust Fund Recovery system, which "receives from IDRS all open trust fund modules with a balance due" (IRM 5.7.4.3, July 1, 2025). Payments the business made without written designation are applied "in a manner serving the best interests of the government," which in practice means to non-trust-fund balances and older periods first (IRM 5.7.4.3). A business that owes a 945 balance and a 972CG penalty and sends an undesignated check should expect it to reduce the penalty, which no individual is liable for, before the withholding, which several may be. Designate payments in writing to the trust fund portion of the Form 945 period, and keep the designation letter.

Not every balance is pursued; the manual sets dollar thresholds below which the penalty is normally not asserted, and those figures are redacted from the public IRM (IRM 5.7.4.2.1). What is public is that the thresholds exist and are measured against the trust fund balance, which for a Form 945 is the whole balance.

Who is responsible

"Responsibility is a matter of status, duty, and authority" (IRM 5.7.3.4.1, Aug. 6, 2015). The manual's list of potentially responsible persons is long: officers and employees of a corporation, partners and employees of a partnership, directors and shareholders, "Limited liability company (LLC) member, manager or employee," employees of a sole proprietorship, lenders and sureties, payroll service providers and professional employer organizations and the responsible persons within them, and "Responsible persons within the common law employer (client of PSP/PEO)" (IRM 5.7.3.4.1). A responsible person has a "Duty to perform," the "Power to direct the act of collecting trust fund taxes," "Accountability for and authority to pay trust fund taxes," and "Authority to determine which creditors will or will not be paid" (IRM 5.7.3.4.1). The revenue officer identifies who are officers, directors or shareholders, who hires and fires, who decides which creditors to pay, who signs and files the returns, who controls "payroll/disbursements," and who makes federal tax deposits.

Delegating does not help the person at the top: "Persons with ultimate authority over financial affairs may generally not avoid responsibility by delegating that authority to someone else," unless the delegation "rendered the person (delegator) powerless to disburse funds or dictate fiscal policy" (IRM 5.7.3.4.1.1). Honorary, volunteer directors of tax-exempt organizations are generally not responsible unless they took part in day-to-day or financial operations and actually knew of the failure (IRM 5.7.3.4.1.1; IRC 6672(e)).

Non-owner employees. Policy Statement 5-14 protects people who perform "ministerial acts without exercising independent judgment" (IRM 5.7.3.4.1.2, June 6, 2025). The manual's examples are a bookkeeper who has check-signing authority but "is not permitted to pay any other bills" than those the treasurer gives her and must ask which to pay when funds are short, and a clerical secretary who signs checks and returns "at the direction of and for the convenience of the owner." Neither is responsible. The line is "significant control" over the company's finances, which "means more than having the mere mechanical duty of signing checks or preparing tax returns or having a title that appears to have authority," though "a responsible person need not have the final word in the company regarding the payment of creditors" (IRM 5.7.3.4.1.2). The two court examples the manual gives both involve non-owners held potentially liable: a long-time controller who prepared payroll, filed the returns, dealt with the lender and paid net payroll with the funds the lender released, and a seven-month general manager who signed most checks and was told by the owner that the unpaid taxes were "none of the general manager's business."

Payroll providers and their clients. Using a payroll service provider or PEO "does not relieve the common law employer and employees of the common law employer who are responsible for collecting, accounting for, and paying over the common law employer's employment taxes from the responsibility of ensuring that all of the common law employer's Federal employment tax obligations are met" (IRM 5.7.3.4.3, July 19, 2012). Willfulness on the client side turns on whether the client knew of "a pattern of noncompliance by the third-party payer," whether the provider "used fraud or deception," whether the client "had received prior IRS notices indicating that employment tax returns have not been filed," and what the client did after learning (IRM 5.7.3.4.3). For a payer, the same analysis applies to a 1099 service bureau or AP outsourcer that was supposed to deposit backup withholding and did not.

LLCs. For employment taxes on wages paid from 2009, a single-member LLC that has not elected corporate treatment is "treated as a corporation" and "A TFRP investigation is required" of its members, managers and employees; for an LLC taxed as a partnership "The TFRP determination must be made," because "Under state law the members of an LLC classified as a partnership are not liable for the debts of the partnership" (IRM 5.7.3.4.1). The LLC form does not shelter the people inside it from this penalty.

What willful means

The government "generally must demonstrate that a responsible person was aware, or should have been aware, of the outstanding taxes and either intentionally disregarded the law or was plainly indifferent to its requirements" (IRM 5.7.3.4.2, July 24, 2023). Paying any other creditor while knowing the withholding was not deposited is the usual proof. The evidence the revenue officer collects to show it is listed in the investigation manual: bank signature cards or electronic-banking credentials, "cancelled checks" or bank statements "showing payments to other creditors," articles of incorporation and minutes, and the Form 4180 interview answers (IRM 5.7.4.2.7, July 14, 2023).

Three kinds of assessment are singled out as hard to prove willful. Combined Annual Wage Reporting assessments, where the business may never have known the figures disagreed. Assessments under IRC 3509, the reduced rates used when workers are reclassified, which "require a determination of intentional disregard" before any penalty is possible. And volunteer directors of exempt organizations, who need "actual knowledge" (IRM 5.7.3.4.2). Backup withholding is none of these. A payer that received a CP2100 and kept paying the listed vendors in full, or that was told in a Letter 6112 that its 1099s carried no TINs and did not respond, has been "notified that withholding taxes have not been paid" in the manual's sense.

How the investigation runs

At the first contact on an unpaid trust fund balance, the revenue officer "will attempt to conduct interviews with all available potentially responsible persons," hands over Publication 1 and Notice 784, Could You be Personally Liable for Certain Unpaid Federal Taxes?, presents the TFRP calculation from page 4 of Form 4183 and the ATFR calculation sheet, and tells each person "the IRS can assess the TFRP against those individuals determined to be liable for the penalty for the unpaid trust fund amount and collect the liability from their personal income and assets" (IRM 5.7.4.2.3, July 14, 2023). The officer also advises "the proper actions to take to avoid such liability," which at that stage means deposit the current withholding and pay the old balance ahead of other creditors.

The interview is recorded on Form 4180. "Do not give or mail Form 4180 to the potentially responsible person(s) or representative for completion by that person or for review prior to the interview. The form must be completed in person or over the phone" (IRM 5.7.4.2.4, Mar. 27, 2023). A summons can compel attendance. Page 1 carries the core responsibility and willfulness questions, page 3 the payroll-provider section, and "A Form 4180 interview must still be completed, even if the responsible person or persons sign Form 2751" (IRM 5.7.4.2.4). Anyone interviewed who "wish[es] to consult with an authorized representative" is entitled to have the interview suspended (IRM 5.7.4.2.3). People sometimes sign Form 2751, the agreement to the proposed assessment, in the room; the manual tells the officer not to treat it as final until the 60-day period plus five days has run, "as a responsible person may change their mind after signing the waiver" (IRM 5.7.4.2.4).

The recommendation goes on Form 4183 to the group manager; the amount can be lowered if the business produces payroll records "showing the composition of the FTD and that it was timely" (IRM 5.7.4.2.3). For a Form 945 that means deposit records tying each EFTPS payment to the withholding it covered.

Letter 1153 and the 60 days

After approval the officer has 20 calendar days to issue Letter 1153 with Form 2751, "Either hand deliver or mail certified (return receipt requested) ... to the responsible person or person(s) only," with Publication 1, page 4 of Form 4183 and the ATFR calculation "so that they are aware of how payments were applied to the account" (IRM 5.7.4.7, Mar. 27, 2023). Entering the delivery date "will systemically upload TC 130, Entire Account Frozen from Refunding," on the person's individual account; no refund issues to them while the proposal is open. The letter "Notifies the responsible person of the proposed assessment," "Contains a description of the available appeal rights," and "Affords the responsible person the opportunity to agree to or to appeal the assessment" (IRM 5.7.4.7).

The IRS "must wait 60 days after issuance of Letter 1153 before issuing notice and demand for payment," and "A responsible person's signature on the Form 2751 does not extinguish their appeal rights" (IRM 5.7.3.7.2, July 24, 2023). A timely protest, "on or before the 60th day after the proper mailing or personal delivery of Letter 1153," goes to the Independent Office of Appeals, and the assessment statute is held open to the later of 90 days after the letter was mailed or 30 days after Appeals' final determination (IRM 5.7.3.7.2). The protest is the one place to argue the two elements: that the person lacked the authority the manual describes, or that the failure was not willful on the facts. After assessment the person owes interest "from the date of assessment to the date of payment" (IRM 5.7.4.2.4), and the ordinary collection sequence follows on the individual's account.

The installment agreement that defers it

A business still operating that can pay the balance over time changes the calculus. The officer "can secure an in-business installment agreement rather than recommending immediate assertion of the TFRP, as long as" the business qualifies, "The TFRP assessment statute expiration date (ASED) is appropriately extended," and "The investigative aspects of the TFRP inquiry are documented and preserved" (IRM 5.7.4.8.1, July 14, 2023). Where the agreement will not pay everything off at least a year before the earliest assessment statute, the officer must still complete the interviews, secure collection information statements from the responsible persons, get each of them to sign Form 2750 extending the statute "to the expected end-date of the agreement plus one year," and assemble the file "to the point of assessment." A responsible person who refuses to sign the waiver, and whose penalty "is determined to be collectible," has the file submitted for assessment. The officer may still assert the penalty where the business is "a repeater" or the agreement is long.

Two more rules from the same section matter for payers. "No TFRP determination is required on cases meeting the requirements for In-Business Trust Fund Express Installment Agreements" (IRM 5.7.4.8.1 Exception), the streamlined business plan described on the CP504 page, so a Form 945 balance that fits that plan can avoid the question entirely if the business asks early. And "While under an approved installment agreement, a corporation may not designate its monthly installment payment be applied to the trust fund portion of the tax" (IRM 5.7.4.8.1 Note); the designation strategy described above works for voluntary payments before an agreement, not for the instalments under one.

The conditions are stricter than the Exception suggests, and they are in the installment-agreement manual rather than the penalty manual: no TFRP determination is required "only when all of the following conditions are met: The unpaid balance of assessment (UBA) is $25,000 or less; The taxpayer qualifies for and is granted a Simple Payment Plan (Business Trust Fund); The entire liability will be paid in full by the Collection Statute Expiration Date (CSED); and The Simple Payment Plan is granted within 120 calendar days of case assignment on ICS" (IRM 5.14.5.4, July 21, 2026). The balance may be paid down to the threshold beforehand but "may not use the first installment payment to reduce the balance," the business must be in filing compliance, and the plan is refused where it is requested "in conjunction with a request for levy release." Payments under any installment agreement cannot be designated: "Taxpayers are not permitted to designate installment agreement payments," and officers who pay with personal funds on the business's behalf toward the agreement find them applied "in the best interest of the government" too; voluntary payments from a responsible person's own resources outside the agreement are the exception (IRM 5.14.7.5, Aug. 5, 2010). The CP504 page has the plan's other terms.

How long the IRS has

For withholding the penalty must be assessed within "three years from the succeeding April 15 or from the date the return was filed, whichever is later," and "There is no limitation period for assessing the TFRP on withholding ... until a return is filed"; a substitute return the IRS prepares under IRC 6020(b) does not start it (IRM 5.7.3.6, Nov. 12, 2010). A Form 945 for 2024 filed in January 2025 therefore keeps the responsible persons exposed until April 15, 2028, longer if the return was late and indefinitely if it was never filed. Letter 1153 extends that date as described above; Form 2750 extends it by agreement. The statute page has the clocks for the business's own liability and for the penalties.

What to do with this

• Deposit backup withholding on the 945 schedule, not with the vendor payment run. The money is the government's from the day it is withheld; a business that spends it has made every officer with disbursement authority a potential defendant for the full amount.
• If the business cannot pay everything, pay the Form 945 balance first and say so in writing. Undesignated payments go where the government prefers. A designation to the trust fund portion of a named Form 945 period protects the people, and it is allowed for voluntary payments outside an installment agreement.
• Ask for the business plan before the interview. An In-Business Trust Fund Express agreement, where the balance qualifies, removes the TFRP determination from the case.
• Treat the Form 4180 interview as the hearing. Answers about who decided which creditors to pay are the evidence. A person entitled to a representative can stop the interview to get one.
• Fix the cause. Most Form 945 balances exist because 1099s went out with missing or wrong TINs and the 24% was never withheld. The solicitation rules and the TIN Matching guide are how the balance never arises.

Questions people ask