Staffing agency tax debt: payroll, PEOs and who is liable
Last updated · Reviewed for accuracy against IRS.gov guidance
A staffing agency's main product is payroll, so its tax debt is almost always employment tax — and almost all of it is trust money. Because clients pay on 30- to 60-day terms while payroll is weekly, agencies borrow from withheld taxes more often than most businesses. Who ends up liable also depends on whether a PEO or payroll agent is involved.
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Why agencies fall behind
Placed workers are usually the agency's W-2 employees, so the agency withholds and deposits income tax and FICA under Publication 15 even when a client is slow to pay. Fast growth makes it worse — more placements means more payroll before more cash. Missed deposits quickly compound with failure-to-deposit penalties, and unpaid withheld amounts can be assessed personally through the Trust Fund Recovery Penalty.
PEOs, CPEOs and payroll agents
The IRS third-party arrangement chart explains who is liable in each setup. With an ordinary PEO or payroll service, the client generally remains liable if the provider fails to deposit. A certified PEO is generally solely liable for federal employment taxes on wages it pays to worksite employees. A section 3504 agent shares liability with the employer. Agencies that act as payroll providers for others take on these obligations too.
Common audit issues
- Treating placed workers as 1099 contractors — see worker misclassification.
- Per diem and expense reimbursements that don't meet accountable-plan rules, turning them into wages.
- Form 941 totals that don't reconcile with W-2s.
- State unemployment rate manipulation (SUTA dumping) through affiliated entities.
If the agency closes
Closing doesn't remove trust fund exposure; the IRS can pursue responsible people. See closed business payroll tax guidance.
What to do first
Make this period's deposits on time — the IRS treats an agency that keeps pyramiding as a high-priority case. Then file any missing 941s, size an in-business installment agreement and run the assessment.
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Start the calculatorFrequently asked questions
If my PEO didn't pay, am I still liable?
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With an ordinary PEO, generally yes. A certified PEO is generally solely liable for federal employment taxes on wages it pays.
Are placed workers employees of the agency or the client?
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Usually the agency's, when it hires, pays and can fire them, but each arrangement depends on the facts.
What is pyramiding?
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Falling behind on payroll taxes quarter after quarter while continuing to operate — the IRS prioritizes stopping it.
Can agency owners be personally liable?
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Yes, through the Trust Fund Recovery Penalty if they were responsible and acted willfully.
Are per diems wages?
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Not if paid under an accountable plan; otherwise they can be treated as taxable wages.
What should an agency do before switching to a PEO?
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Check whether the PEO is IRS-certified, confirm in writing who files and deposits, and get proof of deposits each quarter, since an ordinary PEO's failure can leave the agency liable.
Does the IRS treat a growing agency differently?
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No special rules apply, but an agency whose unpaid payroll keeps growing is the kind of case the IRS assigns to a revenue officer quickly.
Related topics
Sources
IRS figures on this page (rates, fees, thresholds) verified as of 2026-11-04. See our editorial policy.
TaxSettlementCalculator.com is not a tax firm, law firm, CPA, or government agency and is not affiliated with the IRS or any state tax agency. Estimates are for educational purposes only and are not tax, legal, or financial advice. Results vary based on individual circumstances, and no outcome is guaranteed. We connect users with independent tax relief professionals.