How to record wages when using a PEO

A PEO records wages by classifying each worker, calculating gross pay, withholding taxes, applying benefits deductions, and paying employees through its own payroll system under its own EIN. The client business then records the PEO's invoice, including gross wages, administrative fees, tax liabilities, and benefits premiums, as separate line items in its own accounting system. This page covers the client-side bookkeeping that runs alongside a PEO's payroll processing: what shows up on a PEO invoice, who is liable for payroll taxes, what a PEO costs, and what other payroll duties a PEO takes on.

You record wages when using a PEO by reviewing the co-employment agreement, classifying employees correctly, processing wages through the PEO's payroll platform, posting the PEO's invoice to your books, and generating internal reports for compliance and budgeting.

1. Review the PEO agreement to understand payroll roles and responsibilities. A PEO and the client enter a co-employment or client service agreement: the PEO becomes the administrative employer and the client stays the worksite employer managing daily operations. The agreement covers processing salaries, bonuses, commissions, and deductions and issuing pay stubs; filing employment tax returns under the PEO's own EIN, including Forms W-2, W-3, 941, and state unemployment filings, in line with FICA (Federal Insurance Contributions Act) and FUTA (Federal Unemployment Tax Act); tracking federal mandates such as the FLSA (Fair Labor Standards Act) and the ACA (Affordable Care Act); and certification status, since some PEOs hold IRS certification as a certified PEO (CPEO) or ESAC accreditation.
2. Classify employees accurately. A PEO separates independent contractors from employees, exempt from non-exempt staff, and full-time from part-time workers. Correct classification drives tax withholding, benefits eligibility, overtime compliance, and workers' compensation coverage. Misclassification, especially exempt versus non-exempt status, triggers penalties for unpaid overtime, unpaid minimum wage, and back wages under the FLSA.
3. Use PEO-provided payroll systems for wage processing and tracking. Cloud-based platforms such as Gusto, Deel, and OnPay centralize time and attendance tracking, tax withholding and filing, benefits deductions, direct deposit, and year-end form generation such as W-2s and 1099s, and run payroll on schedule. These systems update automatically for changing tax rates and filing deadlines, cut manual data entry, and offer self-service portals so employees can view pay stubs, request time off, and manage benefits enrollment.
4. Record the PEO's invoice in your accounting system. Each invoice breaks into distinct accounting entries covering gross wages, tax liabilities, benefits premiums, workers' comp costs, and the administrative fee. See the line-by-line breakdown below.
5. Maintain compliance with tax and labor laws. The PEO calculates and withholds federal and state income tax, Social Security, and Medicare, in line with payroll taxes requirements, and handles the filings covered in the liability section below. It also tracks minimum wage changes, overtime eligibility, and exempt versus non-exempt classification rules, and manages ACA reporting and benefits-eligibility audits.
6. Generate and maintain internal payroll reports for budgeting and audits. Monthly, quarterly, and yearly payroll reports break down labor costs, salaries, taxes, and deductions, supporting audits, budgeting, cash flow tracking, and administrative decisions. Quarterly and annual reports let management compare actual spend against budget, adjust forecasts, catch errors early, and improve audit readiness.

A PEO invoice breaks into five components: gross wages, payroll tax liabilities, benefits premiums, workers' compensation costs, and the PEO's own administrative fee, and each one gets its own entry on the client's books.

Posting these five lines separately, rather than booking one lump invoice amount, is what lets your accounting system show the true cost of labor and reconcile against budget each period.

A PEO calculates and withholds federal and state income tax, Social Security, and Medicare, then files under its own EIN rather than the client's, covering Form 941 (quarterly federal tax return), Form 940 (annual federal unemployment tax return), W-2s for employees, 1099-NEC forms for contractors, and state unemployment (SUTA) filings.

Tax liability depends on certification. Only a certified PEO (CPEO), holding IRS certification as a Certified Professional Employer Organization, assumes direct liability for federal employment tax filings. Without that certification, the client business stays legally liable for tax obligations and penalties even though the PEO handles the filing work. ESAC accreditation adds a further layer of financial compliance oversight.

The PEO is considered the employer for payroll tax purposes in a PEO agreement, acting as employer of record for tax filings and filing under its own EIN. The client remains legally liable for tax obligations and penalties unless the PEO is IRS-certified.

A PEO handles Form 941, Form 940, provides W-2s for employees, and often issues 1099-NEC forms for contractors, as described above.

A PEO takes on responsibility for payroll taxes, handling both filing and legal liability once it is certified, while a payroll service only prepares and files the forms, leaving the client legally responsible for any tax issues.

An EOR (Employer of Record) acts as the sole legal employer and handles all employment tasks, compliance, and payroll directly. A PEO works as a co-employer, sharing HR responsibilities such as payroll, benefits, and compliance, while the client remains the legal employer.

A PEO typically costs $100 to $250 per employee per month on a flat-fee basis, or 3% to 12% of gross payroll on a percentage model, and that fee covers administration only. Benefits premiums, payroll taxes, and workers' compensation insurance, shown as separate lines on the invoice breakdown above, are billed on top as pass-through costs. Actual cost depends on the services required and the size of the business.

Cost also varies widely by country when hiring outside the US. Employer social security contributions run a median of 12.6% per our Global Employer Burden Index dataset (196 countries), with New Caledonia the highest we track at 36.49%. Statutory notice periods add employer cost at separation too: the median across 198 countries is 4.3 weeks, with Gambia the highest at 26 weeks.

Recording wages through a PEO saves time and cost, improves the accuracy of pay data, cuts administrative burden, strengthens compliance, lowers payroll liability, and centralizes time and attendance tracking.

Beyond recording wages, a PEO sets payroll policies, manages tax withholding and filing, administers employee benefits, and prepares payroll documentation for compliance and audits.

These duties sit within the broader scope of PEO services, using the same payroll data and platforms described in the wage-recording steps above. For more on the health and liability coverages bundled into these benefits, see PEO insurance.

Once you understand how a PEO records and reports wages, the next step is comparing providers directly. See our PEO service reviews to weigh pricing, support, and compliance track record before you sign an agreement.