Most business owners assume that forming an LLC or corporation shields them personally from company debts. For one category of tax, that assumption is dangerously wrong. Unpaid payroll "trust fund" taxes can pierce the corporate veil and become your personal liability — through a mechanism the IRS calls the Trust Fund Recovery Penalty (TFRP), authorized under Section 6672 of the tax code. It is one of the few debts that can follow an owner home, and understanding it is essential for anyone who runs payroll.
What "Trust Fund" Taxes Actually Are
When you run payroll, you withhold money from employees' paychecks — federal income tax and the employee's share of Social Security and Medicare. That money never belonged to your business; you are holding it "in trust" on behalf of your employees and the government until you remit it. The TFRP applies specifically to this trust-fund portion. Because the money isn't really the company's, the law treats failing to hand it over far more harshly than an ordinary unpaid bill.
Who Can Be Held Personally Liable
The penalty targets any "responsible person" — and that term is broader than most owners expect. The IRS looks at status, duty, and authority over the company's finances, not titles. A responsible person can be an owner, an officer, a partner, a sole proprietor, or even an employee, a bookkeeper, or anyone with authority to decide which bills get paid or who can sign checks. Control need not be exclusive; more than one person can be held liable at the same time. If you can direct which creditors get paid, the IRS may consider you responsible.
What "Willful" Really Means
The second element the IRS must establish is willfulness — and here, too, the bar is lower than people assume. Willful does not require evil intent or an intent to defraud. It simply means you knew the taxes were owed and either chose not to pay them or recklessly disregarded an obvious risk that they wouldn't be paid. Critically, using available cash to pay other creditors — a landlord, a supplier, even net payroll — while the trust-fund taxes go unpaid is itself treated as evidence of willfulness. "We had to keep the lights on" is not a defense; it is often the government's exhibit A.
Why This Penalty Is So Dangerous
Three features make the TFRP uniquely serious. First, it equals 100% of the unpaid trust-fund taxes — the full amount, assessed personally against you. Second, unlike many IRS penalties, Section 6672 has no reasonable-cause exception; good intentions and hard times do not excuse it. Third, it is generally not dischargeable in bankruptcy, so you cannot walk away from it even if the business fails. And once the IRS assesses it, the burden shifts to you to disprove responsibility or willfulness.
How to Protect Yourself
The defense is almost entirely procedural. Never "borrow" from withheld payroll taxes to cover a cash crunch — that money is not yours to borrow. If you use a payroll provider, confirm that deposits are actually being made on schedule; provider errors do not erase your liability. Keep payroll tax deposits current even when money is tight, and if you genuinely cannot pay, prioritize the trust-fund portion and get professional help immediately rather than paying other creditors first. Clean, current books make it obvious the moment a deposit is missed — which is precisely when the problem is still fixable.
How VarStan Helps
Payroll tax compliance is one of the highest-stakes, least-forgiving areas of running a business — and one where a good bookkeeper earns their fee many times over. As part of our CPA-led work, we help clients keep payroll deposits accurate and on time, monitor that third-party providers are actually remitting, and flag cash-flow trouble early, before a missed deposit becomes a personal liability. If you're ever unsure whether your payroll taxes are truly being paid over — not just withheld — that is exactly the kind of question worth answering before the IRS asks it for you.