Staffing Agency Taxes: The Payroll You Carry for Clients, Workers' Compensation by Class Code, the PEO Question, and the Gross-Versus-Net Revenue Line

A staffing agency sells labor it employs, and the return follows the payroll. Employer of record — the agency's defining role: the temporary workers (light industrial, clerical, hospitality, healthcare, IT — whatever the agency places) are the agency's employees, not the client's: the agency recruits, screens, hires, pays, withholds, files the Forms 941 and W-2s, pays the employer's payroll taxes and unemployment, carries the workers' compensation, and handles the I-9s — while the client directs the day-to-day work at its site; the joint-employer doctrines (under the wage-and-hour and labor laws) can make the client a co-employer for some purposes, but for federal employment taxes the agency that pays the wages and controls the payment is the employer; the agency's liability for the payroll taxes is its own — a staffing agency that falls behind on its deposits has a trust fund recovery penalty exposure (the trust fund penalty guide) that reaches its owners personally, and payroll tax failures are the industry's most common path to insolvency. The payroll float — the cash problem: the agency pays its temporaries weekly (often on Friday for the prior week) and bills the client weekly or biweekly on terms of net 30 to net 60 — so the agency funds four to eight weeks of payroll before it collects; growth consumes cash (every new placement adds a payroll the agency carries before it's paid); most staffing agencies use factoring (selling the receivables to a factor at a discount — the factoring fee a cost; a factoring arrangement with full recourse is generally treated as a loan secured by the receivables — the advance isn't income, and the billing becomes income when the client pays — while a true sale without recourse turns the receivable into cash-method income when the factor pays for it) or an asset-based line of credit. Revenue — gross versus net: the agency bills the client the worker's hours at a bill rate (the pay rate plus the markup — 25 to 70 percent depending on the sector — covering the payroll taxes, the workers' compensation, the benefits, the overhead, and the profit); the agency's revenue is the gross billing (it is the employer, and the wages are its cost), with the wages and the burden as cost of services — the gross margin (billing less wages and burden) is the industry's diagnostic; the direct-hire placement fees (a fee when a client hires a candidate as its own employee — usually 15 to 25 percent of the first year's salary, with a guarantee period and a refund or replacement if the hire leaves) are income when received, with any refund a reduction when paid; the temp-to-hire conversion fees are the same. Workers' compensation — by class code: the agency's workers' compensation premium is computed by the class codes of the work its temporaries perform (a clerical class at a low rate; a warehouse or construction class at a high one) — so the agency's cost of a placement depends on the client's work, not the agency's office; an agency that places workers in a higher-hazard job than it reported to its carrier faces the carrier's audit reclassification (the roofing entity guide's audit point) — the bill rates for hazardous placements must carry the premium; the experience modifier (the agency's claims history) moves the whole book's rates. The PEO question — a different business: a professional employer organization co-employs a client's entire workforce (the client's own employees, not temporaries the PEO recruited) and handles payroll, benefits, and compliance for a fee — and a certified PEO (certified by the IRS under section 7705) is solely liable for the federal employment taxes on the wages it pays to the worksite employees, with the wage base continuing across the transition; with an uncertified PEO, the client remains liable for the employment taxes if the PEO doesn't pay them; a staffing agency that also offers PEO services runs them as a separate line (the revenue recognition differs — a PEO's revenue may be reported net of the wages it passes through under the financial accounting rules, while for tax the gross billings are generally income with the wages as deductions — taxable income is the same either way; the difference matters mainly for gross-receipts tests), and the IRS certification is a significant compliance undertaking (a bond, audited financial statements, and ongoing reporting). The staffing agency's own staff: the recruiters (commissioned — employees), the account managers, the payroll and compliance staff — the agency's internal payroll, separate from the temporaries'. Other costs: the job boards and the applicant tracking system (the largest non-payroll line — recruiting never stops), the background checks and drug tests (billed to clients in some contracts, absorbed in others), the I-9 and E-Verify compliance, the vendor management system fees (large clients procure staffing through a vendor management system that charges the agency a percentage of billing — a cost, never netted against revenue), the insurance (workers' compensation, general liability, employment practices — the agency's exposure for its temporaries' claims of harassment and discrimination at the client's site — the staffing professional liability and crime coverage), and the state registrations (many states license staffing agencies or employment agencies). The credits: the Work Opportunity Tax Credit (the restaurant deductions guide) has been especially valuable to staffing agencies that place workers from targeted groups — the agency is the employer, and the credit is the agency's — but it lapsed for workers who begin work after December 31, 2025, and Congress hasn't renewed it as of this writing; wages paid in 2026 to earlier hires still qualify through their first year, and because past lapses were renewed retroactively, the onboarding keeps filing Form 8850 within 28 days of each start (the credit also reduces the wage deduction dollar for dollar — section 280C). Entity and the specified service question: staffing is not listed as a specified service field, but the regulations look at what the workers do — an agency that places workers in a specified field (nurses and therapists — health; accountants — accounting; lawyers — law; IT consultants who provide advice — consulting; engineers are not a specified field) may be treated as performing services in that field (the IRS hasn't issued staffing-specific guidance, and the regulations' rule for services provided to an SSTB reaches only businesses under 50 percent or more common ownership with it; the analysis asks whether the agency, through the employees it places and bills for, performs services in the field — a nurse staffing firm billing hospitals for nursing hours — rather than only recruiting for a placement fee), while an agency placing light industrial, clerical, or hospitality workers is not an SSTB (the staffing agency entity guide). Sales tax: staffing services are exempt in most states and taxable in a few — Pennsylvania (help supply services), Ohio (employment services), and, since October 1, 2025, Washington (temporary staffing, except to licensed hospitals) among them — while others tax the staffing of services that are themselves taxable. The bookkeeping: billings by client at gross; the temporaries' payroll with deposits on schedule; workers' compensation by class code with the carrier's audit reconciled; the gross margin by client and sector; direct-hire fees with guarantee refunds; factoring advances and fees; vendor management system fees; the internal payroll; WOTC certifications; state registrations; insurance. The errors: payroll tax deposits late (the trust fund exposure); revenue booked net of wages; placements in hazardous classes reported under clerical codes; the vendor management system's fee netted; the WOTC's Form 8850s filed after 28 days; and a healthcare staffing line assumed to be non-SSTB.

Key takeaways

• The agency is the employer of record — wages, withholding, payroll taxes, unemployment, workers' compensation, and I-9s are its obligations; a late deposit puts the owners in reach of the trust fund recovery penalty.
• The payroll float funds four to eight weeks of wages before collection — factoring or an asset-based line is the industry's working capital; the factoring fee is a cost.
• Revenue is gross billing, with wages and burden as cost of services; direct-hire fees are income when received, with guarantee refunds as reductions.
• Workers' compensation is priced by the client's class codes — bill rates for hazardous placements must carry the premium, and the carrier's audit reclassifies misreported work.
• A certified PEO is solely liable for its worksite employees' federal employment taxes — a different business from temporary staffing, run as its own line.
• The Work Opportunity credit belongs to the agency as employer — lapsed for workers starting after 2025 unless Congress renews it; an agency staffing licensed professionals in a specified field may be treated as in that field.

The staffing agency's deduction file

Billings by client at gross. Temporaries' payroll: deposits on schedule; Forms 941, W-2. Workers' comp by class code; audit reconciliation; experience modifier. Gross margin by client. Direct-hire fees; guarantee refunds. Factoring advances and fees. VMS fees at gross. Internal payroll (recruiters, account managers). Job boards, ATS, background checks, E-Verify. WOTC: Form 8850 within 28 days; Form 5884. State staffing registrations. Insurance (workers' comp, GL, EPL, staffing professional, crime). PEO line if any (certification). SSTB review by placement field. The deposit schedule and the class codes are the two lines that decide survival.

Worked example

A light industrial and clerical staffing agency bills US$8.2 million: US$7.9 million of temporary billings at gross (about a 41 percent average markup on pay) and US$300,000 of direct-hire fees (US$18,000 refunded under 90-day guarantees). Temporaries' payroll: US$5.6 million of wages to about 900 workers over the year, with semiweekly deposits made on time (the agency's controller tracks the deposit calendar daily — the trust fund exposure is the owners'); workers' compensation at three class codes (clerical, warehouse, light manufacturing) — the carrier's audit moved one client's placements from warehouse to a machine-operator class, and the agency re-priced that client's bill rate. The payroll float funded by an asset-based line (interest deducted); a large client's vendor management system charges 2.5 percent of billing (US$41,000 — a cost at gross). Internal payroll: eleven recruiters and account managers. WOTC: Form 8850 still filed at onboarding for every hire, banking the credit in case Congress renews it retroactively; US$63,000 of credits on Form 5884 for 2025 hires' remaining first-year wages (the wage deduction reduced by the same amount). Gross margin about 22 percent after wages and burden; net profit in the mid six figures — an S corporation (the entity guide), non-SSTB (light industrial and clerical placements). A healthcare staffing competitor placing travel nurses assumed its income qualified for the QBI deduction — its adviser flagged the health-field placements for review.

Official sources

The IRS states: “Generally, the CPEO is solely liable for paying the customer's employment taxes, filing returns, and making deposits and payments for the taxes reported with regard to remuneration it pays to work site employees (as defined in IRC 7705(e)).” — Internal Revenue Service, CPEO customers – What you need to know, https://www.irs.gov/tax-professionals/cpeo-customers-what-you-need-to-know

The IRS states: “These taxes are called trust fund taxes because you actually hold the employee's money in trust until you make a federal tax deposit in that amount. The TFRP may apply to you if these unpaid trust fund taxes cannot be immediately collected from the business.” — Internal Revenue Service, Employment taxes and the trust fund recovery penalty (TFRP), https://www.irs.gov/businesses/small-businesses-self-employed/employment-taxes-and-the-trust-fund-recovery-penalty-tfrp

Practitioner note

A staffing agency is the employer of people who work somewhere else, and its survival depends on two lines most small businesses never carry at this scale: the payroll tax deposits on hundreds of temporaries' wages — a late one puts the owners in reach of the trust fund recovery penalty — and the workers' compensation priced by the client's work, not the agency's office. Our staffing files book revenue at gross with wages as cost of services, reconcile the carrier's class-code audit, file the Work Opportunity credit's certification at every onboarding, and review the specified-service question by placement field — because staffing nurses is not the same as staffing a warehouse.

See also: For related guidance, see the employee-or-contractor tests for carpet cleaning technicians; and browse every small business tax guide, by situation.

Next step

Fairlight Accounting is a cross-border accounting and tax practice with a U.S. Tax Desk and a Canadian Tax Desk. Our U.S. Tax Desk handles staffing agency returns — employer-of-record payroll tax compliance, payroll float and factoring treatment, gross revenue reporting, workers' compensation class code reconciliation, direct-hire fee and guarantee accounting, PEO line analysis, WOTC certification workflows, and SSTB review by placement field. See pricing or book a call.