Ohio New Employer Registration: Step-by-Step Guide

Last reviewed: July 2026

When you hire your first employee in Ohio, you trigger a series of registration requirements at the federal and state level. Missing any of these steps can delay your first payroll or leave you unable to deposit taxes you already owe. This guide walks through everything, in order, with the current agency names and links.

Registration Overview

Here's a checklist of what every new Ohio employer needs:

• ☑ Federal Employer Identification Number (EIN)
• ☑ Ohio withholding account (Ohio Department of Taxation)
• ☑ Ohio SUI account (Ohio Department of Job and Family Services)
• ☑ Workers' compensation coverage (Ohio Bureau of Workers' Compensation)
• ☑ Form IT 4 on file for each employee
• ☑ New hire reporting within 20 days of start date

Step 1: Get Your Federal EIN

Your Employer Identification Number (EIN) is your federal tax ID, needed for federal filings, state registrations, a business bank account, and payroll itself. Apply online at IRS.gov/EIN; it's free and you receive your EIN immediately.

Step 2: Register with Ohio Department of Taxation

Visit the Ohio Department of Taxation website to register for a state withholding account. This allows you to withhold Ohio state income tax, and school district income tax where it applies, from employee paychecks and remit it to the state.

Every employee also completes Form IT 4, the Employee's Withholding Exemption Certificate, at hire. Keep it in the employee's personnel file — it isn't filed with the Department of Taxation, but you'll need it to calculate withholding correctly.

From the Payroll Desk

Don't wait until your first payroll to register. State registrations can take days or weeks to process. Start the registration process as soon as you know you'll be hiring.

Step 3: Register for SUI

Register for a State Unemployment Insurance account through the Ohio Department of Job and Family Services. You'll be assigned:

• An employer account number
• Your initial SUI rate for 2026: 2.85% for new employers (5.85% for construction)
• Quarterly filing requirements

SUI is an employer-paid tax on the first $9,000 of each employee's wages. For 2026 and 2027, ODJFS also assesses a separate Technology and Customer Service Fee of 0.15% on the same wage base. See our Ohio SUI Rates 2026 guide for details.

Step 4: Workers’ Compensation Insurance

Nearly every Ohio employer must carry workers' compensation coverage, which pays benefits to employees injured on the job. Ohio is one of a small number of monopolistic state fund states, meaning private carriers cannot sell workers' comp policies here at all.

Instead, register directly with the Ohio Bureau of Workers' Compensation (BWC), the state fund that provides essentially all Ohio coverage. Larger, financially qualified employers can apply to self-insure instead, but that's a path most new employers grow into rather than start with.

Step 5: New Hire Reporting

Federal and Ohio law require you to report every new hire within 20 days of their start date, used to enforce child support orders and prevent unemployment fraud. Ohio accepts reports online through ODJFS at oh-newhire.com. See our New Hire Reporting guide for the federal side of this requirement.

Step 6: Set Up Payroll

With all registrations complete and a Form IT 4 on file for your first hire, you're ready to run payroll. Use our Ohio paycheck calculator and W-4 helper tool to walk new hires through withholding. For the full ongoing workflow, read How to Do Payroll in Ohio, and see the Form 941 guide for your federal quarterly filing.

Frequently Asked Questions

How do I register as a new employer in Ohio?

Get a federal EIN from the IRS, register for a withholding account with the Ohio Department of Taxation, register for an SUI account with the Ohio Department of Job and Family Services, and set up workers' compensation coverage through the Ohio Bureau of Workers' Compensation before your first payroll.

When must I register as an employer in Ohio?

Register as soon as you know you will hire your first employee. State registrations can take days to process, and you need active account numbers in hand before you can legally withhold or deposit Ohio payroll taxes.

Do I need workers' compensation insurance in Ohio?

Nearly every Ohio employer with one or more employees must carry workers' compensation coverage. Ohio is a monopolistic state fund state, so coverage is purchased through the Ohio Bureau of Workers' Compensation rather than a private insurance carrier.

What is Form IT 4 and who needs to fill it out?

Form IT 4 is Ohio's Employee's Withholding Exemption Certificate. Every employee completes one at the time of hire so you can calculate state and school district income tax withholding; a federal W-4 does not substitute for it.

How soon do I need to report a new hire in Ohio?

Ohio law requires new hire reports within 20 days of an employee's start date. Reports go to the Ohio Department of Job and Family Services and can be filed online at oh-newhire.com.