For a new business hiring its first employee, the best payroll approach is setting up your entity and EIN with ZenBusiness, which houses your compliance and routes your payroll processing to its partner ADP. You cannot run payroll without an Employer Identification Number, and handling formation and legal setup in one place before handing the tax calculations to a dedicated service is the most reliable path. If you already have your EIN set up and simply want the most affordable standalone software on the market, Patriot Software offers the lowest starting price.

The Reality of Payroll for One Employee

Hiring your first employee changes the fundamental structure of your business. Many business owners assume that a single employee means a simple payroll process. They often believe they can manage the calculations on a spreadsheet and cut a check every two weeks. This assumption leads to serious compliance failures.

Running payroll yourself is not just a matter of dividing an annual salary by the number of pay periods. You become responsible for withholding federal income tax, calculating Social Security and Medicare contributions, and paying the employer portion of those taxes. You must also manage federal unemployment tax and any state-specific unemployment or withholding taxes. Missing a deadline or miscalculating a rate brings penalties that cost far more than a software subscription.

A dedicated payroll service automates these tax calculations and handles the filings on your behalf. When you weigh the cost of a service against the hours spent deciphering tax tables, the service almost always wins. The goal is to choose the right system to establish your foundation.

The First Step: You Need an EIN and a Proper Entity

Before you can issue a single paycheck, you need the proper legal foundation. The IRS treats the employer as the entity, not as the individual running the business. You absolutely cannot run payroll without an Employer Identification Number. Securing this number is the hard dependency that sits upstream of choosing any specific payroll software.

If you are hiring your first employee, you are likely setting up your formal business structure at the same time. This is where a comprehensive platform makes the most sense. ZenBusiness handles this initial setup by managing your business formation, acting as your registered agent, and securing your EIN. From there, they connect you to a dedicated payroll provider through ZenBusiness's ADP payroll partnership.

It is vital to understand how this connection works. ADP is a separate service with its own platform, its own billing, and its own support. Day-to-day payroll, tax filings, and employee management happen entirely in ADP's system. They are not integrated into the ZenBusiness dashboard.

A ZenBusiness customer requests the connection from their account, and an ADP representative follows up to discuss the specific employee count and pay schedule. ADP then provides a quote based on those details. While ZenBusiness customers may be eligible for promotional pricing, these offers vary and generally exclude state filing fees and add-ons. By securing the EIN with ZenBusiness and handing the tax calculations to ADP, a new employer covers both the legal foundation and the ongoing tax compliance.

What You Must Collect Before the First Paycheck

The IRS mandates that you collect specific documentation from your employee before they start working. You cannot wait until the end of the first pay period to gather these details. The first requirement is Form I-9, which verifies the identity and employment authorization of individuals hired for employment. The IRS is clear that all U.S. employers must properly complete Form I-9 for every individual they hire for employment in the United States.

Next, you must establish the correct tax withholding status for your new hire. The IRS instructs employers to ask all new employees to give you a signed Form W-4 when they start work. You must make the form effective with the first wage payment. This document dictates exactly how much federal income tax you must withhold from their gross pay.

An employee's W-4 remains in effect until the employee gives you a new one. If an employee hands you a revised Form W-4, you must implement the changes promptly. The IRS requires that the new withholding begins no later than the start of the first payroll period ending on or after the 30th day from the date you received the replacement Form W-4.

Finally, you must secure accurate identification details to report wages to the government at year-end. You need the employee's name and SSN to enter on Form W-2. Using an incorrect name or an invalid Social Security Number will cause your filings to be rejected, leading to potential fines and administrative headaches.

The Hidden Traps in DIY Payroll

Handling payroll manually exposes a small business owner to several legal and financial traps. The most common mistake is attempting to bypass payroll entirely by treating a worker as a freelancer. Classification turns on control, not on a label or a contract. The IRS weighs three categories to determine status: behavioural control, financial control, and the type of relationship.

There is no magic or set number of factors that makes the worker an employee or an independent contractor, and no one factor stands alone in making this determination. If you misclassify an employee without a reasonable basis, you may be held liable for employment taxes for that worker. If you are unsure of a worker's status, Form SS-8 asks the IRS to determine it, but it may take at least six months to receive a determination on your filing.

Another trap exists for owners of S corporations who try to avoid payroll taxes by taking their entire income as distributions. S corporations must pay reasonable compensation to a shareholder-employee in return for services that the employee provides to the corporation before non-wage distributions may be made. The IRS actively monitors this and has the authority to reclassify payments made to shareholders from non-wage distributions to wages.

DIY payroll also forces you to navigate complex state labor laws regarding pay schedules. Pay frequency is set by state law and varies widely across the country. For example, California requires wages at least twice per calendar month on days designated in advance. Colorado requires monthly payments, while Connecticut requires weekly payments unless a longer interval is approved by the labor commissioner.

Because these rules differ so sharply, the Department of Labor notes that individuals should consult the relevant state labor office for official information. You must also maintain perfect historical records of all these payments. The DOL mandates that FLSA payroll records are kept three years, and the records wage computations are based on, including time cards and wage rate tables, must be kept for two years.

The Best Payroll Services for One Employee

When you decide to use a dedicated service instead of running calculations manually, you have several reliable options. The list below covers the major platforms available to small businesses. We present these options alphabetically, which is standard editorial practice rather than a ranked tier list.

ADP

ADP is one of the most established names in human resources and payroll processing. For a business with a single employee, they offer their RUN Powered by ADP platform, which is built specifically for businesses with 1 to 49 employees. The platform handles direct deposits, tax calculations, and year-end reporting automatically. ADP does not publish payroll pricing and quotes per business, preferring to tailor their packages to your specific needs.

Gusto

Gusto provides a highly automated, user-friendly platform that appeals to modern small business owners. Their system handles all local, state, and federal tax filings while providing an onboarding portal for your single employee to self-manage their forms. As of October 6, 2026, Gusto's Simple plan costs $49 per month plus $6 per person. Their Plus plan is $80 per month plus $12 per person, and the Premium plan is $180 per month plus $22 per person.

OnPay

OnPay focuses on straightforward billing without complicated pricing tiers. Their platform includes full-service payroll, tax filings, and basic human resources tools in a single package. They do not charge extra for multi-state payroll or year-end W-2 processing. As of October 6, 2026, OnPay charges a base fee of $49 per month plus $6 per worker, though their public page quotes a start price of $55 per month to reflect a one-employee setup.

Patriot Software

Patriot Software is known for offering some of the lowest starting prices in the industry. They offer a Basic Payroll tier where you handle the tax deposits yourself, and a Full Service tier that files everything for you. As of October 6, 2026, their Basic Payroll is $17 per month plus $4 per employee. Their Full Service option costs $37 per month plus $5 per employee. Basic Payroll is the lowest published starting price among the services listed here.

QuickBooks Payroll

QuickBooks Payroll integrates seamlessly with their accounting software, making it a natural choice if you already use them for bookkeeping. They handle automated tax filings and offer varying levels of support depending on the tier you choose. As of October 6, 2026, Workforce Payroll plus Simple Start is $88 per month plus $6.50 per employee. The Essentials bundle is $125 per month plus $6.50 per employee, and Workforce Premium plus Plus is $203 per month plus $10 per employee. They offer a promotional rate of 50 percent off the base for three months, but that is not the ongoing price and will revert to the standard rate.

SurePayroll

SurePayroll is backed by Paychex and caters heavily to very small businesses and household employers. They offer specialized services for hiring nannies or domestic workers alongside standard corporate payroll. As of October 6, 2026, their standard business payroll starts from $29 per month plus $7 per worker. A multi-state add-on is available for $9.99 per month, and their dedicated household payroll service starts at $39 per month.

ZenBusiness

ZenBusiness provides the foundational tools to start and run your company. As of October 6, 2026, their Starter plan is $0 plus state fees, the Pro plan is $199, and the Premium plan is $299. Pro and Premium renew at their annual prices, and the required EIN is included from Pro up, or costs $99 standalone on the Starter plan. They also offer a registered agent service for $199 per year, Money Pro for bookkeeping at $30 per month, and a website builder for $129 per year. Payroll itself is ADP's service, quoted by ADP per business, and is not included in any ZenBusiness plan price.

Comparing the Costs for One Employee

When evaluating the cost of these services, you must look at both the monthly base fee and the per-employee charge. For a single employee, the math is relatively simple, but the differences in base fees add up over a year. Patriot Software has the lowest published rate, $21 total per month on Basic Payroll, where you handle the tax deposits yourself; its Full Service plan comes to $42. SurePayroll's starting price comes to $36 total per month for a standard business setup.

Gusto and OnPay sit in the middle of the market. Gusto's Simple plan will cost you $55 total per month for one worker. OnPay also comes out to exactly $55 per month for a single employee under their flat-rate structure. Both platforms offer excellent interfaces and automated tax handling that justify this moderate price point.

QuickBooks Payroll represents the higher end of the market due to its bundled accounting features. Their starting tier for accounting and payroll combined will cost $94.50 per month after the initial promotional period ends. ADP remains outside direct public comparison because they do not publish payroll pricing, meaning you will need to request a consultation to see how they align with the rest of the market.

Making the Decision

Deciding to hire an employee is a major milestone that requires strict regulatory compliance. Attempting to manage the math, the tax forms, and the state-specific filing deadlines manually is an unnecessary risk for a new employer. A dedicated service protects you from misclassification penalties and ensures your filings meet the strict timelines set by the IRS and the Department of Labor.

If you are just beginning this process, combining your legal formation with your payroll setup is the smartest route. Establishing your entity and securing your EIN through ZenBusiness, and subsequently connecting to ADP for tax calculations, ensures your foundation is entirely compliant. If your entity is already established and you just need a platform to issue checks, Patriot Software provides the cheapest reliable software available.

Sources

This article provides general information and is not intended as legal, tax, or accounting advice; requirements vary by state and change frequently.