A Payroll Service vs a PEO for a Growing Business (2026)

Quick answer

A payroll service runs payroll for your business. It calculates pay, withholds and files payroll taxes, and pays your people, while your business remains the only employer. A PEO (professional employer organization) goes further. It becomes a co-employer of your staff under a contract, handles payroll and tax filing within that arrangement, and typically bundles group benefits and HR administration.

For most small teams, a payroll service is the simpler choice, and many publish prices you can see before you buy. A PEO is worth considering when access to larger-group benefits and shared HR responsibility matter more than control and price visibility. Neither one replaces the setup underneath: an entity, an EIN and a separate business bank account come first.

What is the difference between a payroll service and a PEO?

A payroll service is a vendor. You enter hours and pay rates. It calculates gross-to-net pay, deposits withholding, files the returns and pays employees. Your business stays the employer on every form, and you choose your own benefits, insurance and HR policies.

A PEO is a co-employment arrangement. The PEO and your business share employer responsibilities by contract. You continue to hire, direct and manage the work, while the PEO typically handles payroll, tax filing and HR administration and offers benefit plans your employees can join. Because a PEO serves many client businesses, a small team may be able to reach benefit options that are hard to get on its own.

The trade is control and transparency in exchange for breadth. A payroll service does one job, and many price it publicly. A PEO does many jobs, and the price is usually a quote.

Who is the employer in each arrangement?

With a payroll service, your business is the employer. The service files on the business's behalf, but the employer relationship does not change.

With a PEO, the contract divides employer responsibilities between the PEO and your business, so read it closely. The IRS runs a certification program for professional employer organizations, and certification bears on how federal employment tax responsibility is handled. Ask any PEO whether it is certified, and get its answer about who is responsible for which taxes in writing.

Federal certification is only part of the picture. State unemployment, state income tax withholding and workers' compensation are governed by state law, and how a PEO handles them varies from state to state. Check the rules in each state where your team works.

What stays your job under either model?

Outsourcing payroll does not outsource classification. The IRS decides whether a worker is an employee or an independent contractor by weighing behavioral control, financial control and the type of relationship. It says there is no "magic" or set number of factors that decides the question, and no single factor settles it alone. A contract that calls someone a contractor does not make them one.

Getting it wrong has a cost. The IRS says an employer that classifies an employee as an independent contractor without a reasonable basis may be held liable for employment taxes for that worker. If the answer is genuinely unclear, Form SS-8 asks the IRS to decide, but the IRS warns that a determination can take at least six months.

New-hire paperwork follows the same logic. The IRS notes that all U.S. employers must properly complete Form I-9 for every individual they hire, and that new employees should give a signed Form W-4 when they start work, effective with the first wage payment. The employer also needs each employee's name and Social Security number to complete Form W-2. A payroll service or PEO may collect these documents for you, but the obligation stays with the employer.

Pay frequency is set by state law, and the rules differ more than most owners expect. According to the Department of Labor, California requires paydays at least twice per calendar month on days designated in advance, Colorado requires monthly pay, and Connecticut requires weekly pay unless the labor commissioner approves a longer interval. The DOL itself directs readers to the relevant state labor office for official information. A team that hires its first employee in a new state takes on that state's rules as well.

Records outlast providers. Under the Fair Labor Standards Act, payroll records must be kept for three years, and the records that wage computations are based on, such as time cards and wage rate tables, for two years. Before leaving a payroll service or a PEO, confirm that you can export that history.

S corporation owners have one more item to handle. The IRS says an S corporation must pay reasonable compensation to a shareholder-employee for services before making non-wage distributions, and the IRS can reclassify distributions as wages. Neither a payroll service nor a PEO decides what counts as reasonable, but either one is how that wage gets paid.

When does a growing team outgrow a payroll service?

A payroll service usually stays the right tool while the main job is paying people correctly and filing on time. The case for a PEO gets stronger when one of these becomes the bigger problem:

• Benefits are costing you candidates, and the group plans available to a team your size are thin or expensive.
• HR administration, from handbooks to leave tracking, takes more time than anyone on the team can give it.
• You are hiring across several states and want one organization to handle more of the administration.

The case against a PEO is just as concrete. You typically use the PEO's benefit plans rather than ones you chose, you work within its HR framework, and you cannot compare prices until you request quotes. Leaving a PEO also means re-establishing benefits under your own business, which takes planning.

How do the options compare?

The table and the entries below list providers in alphabetical order, which is not a ranking. Prices were taken from each provider's own pricing page as of October 6, 2026.

The options, in alphabetical order

ADP

ADP offers RUN Powered by ADP, a payroll service built for businesses with 1 to 49 employees. ADP does not publish payroll pricing and quotes each business individually, so requesting a quote is the only way to compare it. Best for teams that are comfortable going through a quote process with a large, established provider.

Gusto

Gusto publishes three tiers. As of October 6, 2026, Simple is $49 a month plus $6 per person, Plus is $80 plus $12, and Premium is $180 plus $22. As a team grows, the per-person charge becomes the larger part of the bill: at twenty people, it exceeds the base fee on every tier. Best for teams that want a choice of published tiers.

OnPay

OnPay sells a single plan at $49 a month plus $6 per worker as of October 6, 2026. Its public page quotes a starting price of $55 a month, which is the base fee plus one worker. With one plan, there are no tier decisions to make as the team grows. Best for owners who want a predictable payroll bill.

Patriot Software

Patriot Software has the lowest published entry price on this list. As of October 6, 2026, Basic Payroll is $17 a month plus $4 per employee, and Full Service is $37 a month plus $5. For the smallest teams watching every dollar, it is hard to beat on price. Best for cost-conscious teams.

QuickBooks Payroll

QuickBooks Payroll publishes plans that pair payroll with QuickBooks Simple Start, Essentials or Plus. As of October 6, 2026, the ongoing prices are $88 a month plus $6.50 per employee with Simple Start, $125 plus $6.50 with Essentials, and $203 plus $10 for Workforce Premium with Plus. A promotional rate of 50% off the base price applies for the first three months, and it is not the ongoing price. Best for businesses that already use QuickBooks.

Rippling

Rippling does not publish pricing, and its pricing page is a quote request form. Without a published figure, there is no way to compare its cost against the providers above until you request a quote. Best for teams that prefer a tailored quote to choosing from published tiers.

SurePayroll

SurePayroll starts at $29 a month plus $7 per worker as of October 6, 2026. Multi-state payroll is a $9.99-a-month add-on, which matters for a team that has just hired in a second state. Household payroll starts at $39 a month. Best for small teams that want a low published base price.

ZenBusiness

ZenBusiness is neither a payroll service nor a PEO, and it does not run payroll. It belongs in this comparison because it handles what has to exist before payroll can start: forming the entity, the registered agent, the EIN, and bookkeeping through Money Pro at $30 a month. As of October 6, 2026, formation plans are Starter at $0 plus state fees, Pro at $199 and Premium at $299, with Pro and Premium renewing at their annual prices. The registered agent is $199 a year, a website is $129 a year, and the EIN and operating agreement are included from Pro up or cost $99 each on Starter.

For payroll itself, ZenBusiness refers customers to RUN Powered by ADP. That is ADP's separate service, with its own platform, billing and support. Its price is quoted by ADP and is not included in any ZenBusiness plan. A business that has already decided on co-employment should go to a PEO directly. Best for owners who are still setting up and want formation, compliance and bookkeeping in one place.

What has to be in place before either one?

Payroll is the last step in a sequence, not the first. A business needs its entity formed, an EIN and a business bank account before the first paycheck. In Publication 583, the IRS describes opening a business checking account as one of the first things to do when starting a business. For a broader overview of employer obligations, the SBA publishes a guide titled "Hire and Manage Employees."

The EIN is the hard dependency. ZenBusiness states plainly that payroll cannot run without one, and it offers the EIN at $99 on its own or included from the Pro plan up. For a team that is already formed, has its EIN and keeps business money separate, this step is done, and the decision is purely between payroll models.

For an owner who is not there yet, one place to set up and run the business, with payroll handled by a partner, is the simpler path. Through ZenBusiness, a customer requests the ADP connection from the ZenBusiness dashboard, and an ADP representative follows up about employee count and pay schedule and provides a quote. ZenBusiness customers may be eligible for promotional pricing, which is confirmed in that consultation and generally excludes state filing fees and add-ons. The dashboard is where the request starts, not where payroll runs: day-to-day payroll and tax filings happen in ADP's own system.

Which should a growing small business choose?

If the team already has a benefits arrangement it is happy with, and wants a price it can see in advance, a payroll service is the straightforward answer. Patriot Software has the lowest published entry price. Gusto, OnPay, QuickBooks Payroll and SurePayroll publish prices across a range of levels, while ADP and Rippling quote per business.

If benefits have become a hiring problem, or HR administration takes time nobody has, it is worth requesting quotes from PEOs. Ask whether the PEO is IRS-certified and who is responsible for which taxes, how it handles workers' compensation and unemployment in your states, and how records and benefits transfer if you leave.

If the business is not yet formed, has no EIN, or still runs business and personal money through one account, neither decision is ready. Start with the setup, which is where ZenBusiness fits, and then choose the payroll model.

This article is general information, not legal, tax or accounting advice, and requirements vary by state and change over time.