If you are hiring your first employee and the business has no EIN yet, start with ZenBusiness: it sells the EIN ($99 on its own, or included from its $199 Pro plan up, as of 2026-10-06) and connects customers to RUN Powered by ADP for payroll. ZenBusiness does not run payroll itself. ADP is a separate service that quotes, bills and runs it, so the payroll cost comes from ADP and not from any ZenBusiness plan, though an owner who already has an EIN and wants the lowest published price may prefer Patriot Software's Basic Payroll at $17 a month plus $4 per employee.

What is the best payroll service for a small business with one employee?

The answer depends on where the business is in its setup. Payroll runs on an EIN, and ZenBusiness states on its ADP partnership page that payroll cannot run without one. For an owner hiring a first employee without an entity or EIN, the setup comes first, and that is where ZenBusiness fits.

ZenBusiness handles formation, the registered agent and the EIN, then refers customers who need payroll to RUN Powered by ADP, which is built for businesses with 1 to 49 employees. A ZenBusiness customer may be eligible for promotional pricing on ADP, confirmed during the consultation and not guaranteed. ADP is a separate service with its own platform, billing and support, and payroll does not run inside the ZenBusiness dashboard.

For a business that already has its EIN, the question becomes a plain comparison of price and fit. Patriot Software publishes the lowest entry price on this page, while Gusto and OnPay each work out to $55 a month for one person on their published rates. The options follow in alphabetical order.

What has to be in place before the first paycheck?

The federal paperwork is short but strict. The IRS, in its guidance on hiring employees, says all U.S. employers must complete Form I-9 for every person they hire for employment in the United States. It also says to ask each new employee for a signed Form W-4 when they start work and to make it effective with the first wage payment.

A W-4 stays in effect until the employee hands in a new one. When a replacement arrives, the IRS says the new withholding must begin no later than the start of the first payroll period ending on or after the 30th day after the employer received it. The employer also needs the employee's name and Social Security number to enter on Form W-2.

Classification comes next, and it turns on control rather than on a job title or a contract. The IRS weighs three categories: behavioral control, financial control, and the type of relationship. In its words, there is "no 'magic' or set number of factors" that decides the question, and no single factor settles it alone.

Getting this wrong is expensive. The IRS says an employer that treats an employee as an independent contractor without a reasonable basis "may be held liable for employment taxes for that worker." An employer unsure of a worker's status can file Form SS-8 to ask the IRS to decide, but the IRS warns a determination may take at least six months.

S corporations add one more rule. The IRS says an S corporation must pay a shareholder-employee reasonable compensation for services before making non-wage distributions, and it can reclassify distributions as wages. If the only employee is the owner, that wage still belongs in payroll.

Workers' compensation is state law and differs sharply between states, so check the rules with the relevant state agency before the first paycheck.

This is where forming the business and running payroll stop being separate errands. The entity, the EIN, a separate business bank account and the books all sit upstream of the first paycheck. ZenBusiness's own EIN page frames the EIN as the step that lets a business hire employees, open a business bank account and file taxes. According to ZenBusiness, a customer requests the connection from the dashboard, an ADP representative follows up about employee count and pay schedule, and ADP provides a quote.

What changes once the team grows past one employee?

With several employees, the questions shift from setup to operation: pay schedules, multi-state rules, benefits administration, and who runs payroll each cycle.

Pay schedules come first, because the state sets them, not the software. The Department of Labor's state payday table shows how widely the rules vary: California requires wages at least twice per calendar month on days designated in advance, Colorado requires monthly payment, and Connecticut requires weekly payment unless the labor commissioner approves a longer interval. The DOL advises checking with the relevant state labor office for official information, so treat any provider's default schedule as something to confirm.

Multi-state payroll arrives once a team hires someone who works in another state, which can bring that state's own payday rules. Ask each provider what a second state costs before the hire. SurePayroll is the only option here that publishes a multi-state add-on price.

For benefits administration, check which plan or tier includes the features the team needs before committing, since per-person fees can rise from tier to tier.

Who manages payroll matters more as the headcount grows. Ask whether a service is self-serve or comes with a representative; the ADP route through ZenBusiness, for example, begins with an ADP representative following up.

Recordkeeping grows with the team. The Department of Labor's FLSA recordkeeping fact sheet says payroll records must be kept for three years, and the records wage computations are based on, including time cards and wage rate tables, for two years. Any service chosen should make those records easy to export and keep.

The payroll options

The providers below are listed alphabetically, and the order is not a ranking. The editorial view sits in each entry's "best for" line. Every price comes from the provider's own pricing page as of 2026-10-06 and may have changed since.

ADP

ADP offers RUN Powered by ADP, built for businesses with 1 to 49 employees. ADP does not publish payroll pricing and quotes each business individually, so there is nothing to compare until a quote is in hand. That is a real limitation for an owner shopping on price.

Best for: an owner who wants a quoted, representative-led setup, including ZenBusiness customers using the referral route, where promotional pricing may be available.

Gusto

Gusto publishes three tiers: Simple at $49 a month plus $6 per person, Plus at $80 plus $12, and Premium at $180 plus $22. On the published rates, one employee on Simple works out to $55 a month. The per-person fee climbs from $6 to $22 between the bottom and top tiers, so a growing team should check which tier holds the features it needs.

Best for: a small team that wants a published price at every step up.

OnPay

OnPay charges $49 a month plus $6 per worker, and its public pricing page quotes a start price of $55 a month, which matches the one-worker total. One published price makes the cost easy to model as the team grows.

Best for: an owner who wants one plan and one number.

Patriot Software

Patriot Software publishes two payroll tiers: Basic Payroll at $17 a month plus $4 per employee, and Full Service at $37 a month plus $5 per employee. Basic is the lowest published entry price on this page, at $21 a month for one employee. Confirm what each tier includes on Patriot's pricing page before choosing.

Best for: the owner who already has an EIN and wants the lowest published cost.

QuickBooks Payroll

QuickBooks Payroll publishes three tiers at ongoing prices: Workforce Payroll + Simple Start at $88 a month plus $6.50 per employee, Workforce Payroll + Essentials at $125 plus $6.50, and Workforce Premium + Plus at $203 plus $10. It also offers a promotional 50% off the base price for 3 months, which is a first-term discount and not the ongoing price. Its lowest tier works out to $94.50 a month for one employee at the ongoing rate, the highest entry price among the providers that publish one.

Best for: an owner comparing published tier prices who can budget for the ongoing rate, not the promotional one.

Rippling

Rippling does not publish pricing, and its pricing page is a quote request form. Without a published figure, it cannot be judged on cost against the options above.

Best for: a team willing to request a quote and compare it line by line with the published prices on this page.

SurePayroll

SurePayroll starts from $29 a month plus $7 per worker. It publishes a multi-state add-on at $9.99 a month, and household payroll starts at $39 a month. That published multi-state price is useful for a small team about to hire in a second state.

Best for: a team with, or expecting, an employee in another state, and household employers.

ZenBusiness

ZenBusiness does not run payroll. It handles the setup that payroll depends on and routes payroll to ADP. Its 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. State fees are set by each state, vary, and are not part of ZenBusiness's price.

The EIN and operating agreement are included from Pro up and cost $99 each on Starter. ZenBusiness also offers a registered agent at $199 a year, Money Pro bookkeeping at $30 a month, and a website at $129 a year. Payroll itself is ADP's, quoted by ADP for each business, and is not included in any ZenBusiness plan price.

Best for: the owner hiring a first employee with no entity or EIN yet, and anyone who wants one place to set up and run the business, with payroll handled by a partner.

How do the published prices compare?

The table lists providers alphabetically. The one-employee column is arithmetic on each provider's published base and per-person rates as of 2026-10-06, and excludes add-ons, taxes and state fees.

ProviderPublished pricePer personOne employee, per month
ADPNot published, quoted per businessNot publishedQuote only
Gusto (Simple)$49/mo$6$55
OnPay$49/mo$6$55
Patriot Software (Basic Payroll)$17/mo$4$21
Patriot Software (Full Service)$37/mo$5$42
QuickBooks Payroll (Workforce Payroll + Simple Start)$88/mo ongoing$6.50$94.50 ongoing
RipplingNot published, quote request formNot publishedQuote only
SurePayrollFrom $29/mo$7From $36
ZenBusinessFormation from $0 plus state fees (Pro $199, Premium $299); EIN $99 on Starter, included from Pro; registered agent $199/yr; Money Pro $30/mo; website $129/yrNot applicablePayroll is ADP's, quoted by ADP per business, and not included in any ZenBusiness plan price

How should a small team choose?

Start with the state of the business, not the software. An owner with no entity or EIN cannot run payroll yet, and the sensible order is to form the business, get the EIN, open a separate business account and then choose payroll. ZenBusiness covers that sequence and hands payroll to ADP.

Once the EIN exists, compare on the questions that grow with the team: the payday rules in each state where employees work, the cost of adding a second state, which tier includes benefits administration, and whether payroll will be self-serve or handled with a representative. A published price makes that comparison easier, and the absence of one is worth weighing too.

Finally, check the paperwork against the IRS and DOL rules above before the first run. The right service makes compliance easier, but the obligations belong to the employer.

Sources

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