How to Do Payroll in Ohio: A Step-by-Step Guide

Last reviewed: July 2026

Ohio hands new employers a fairly clear checklist, but it's a checklist with an order. Register out of sequence and you can end up owing a deposit you have no account number to pay against. Here's the sequence, with the current agency names and links.

Step 1: Get a Federal EIN

Before touching any Ohio paperwork, get an Employer Identification Number from the IRS. It's free, takes a few minutes online, and the IRS issues the number immediately once you submit the application. You'll use this EIN on every state registration that follows, your business bank account, and every federal and Ohio filing from here forward. Apply at IRS.gov; any business paying wages needs one.

Step 2: Register With Ohio's Tax Agencies

With an EIN in hand, you need two separate Ohio accounts before you can legally withhold or deposit state payroll taxes. Register for a withholding account with the Ohio Department of Taxation, which lets you withhold Ohio state income tax from paychecks and remit it back to the state under an employer withholding account number.

Separately, register for an unemployment insurance account with the Ohio Department of Job and Family Services (ODJFS). This SUI account is entirely independent of your withholding account with the Department of Taxation.

Step 3: Collect Form IT 4 and Set Up Withholding

Every Ohio employee completes Form IT 4, the Employee's Withholding Exemption Certificate, at the time of hire. A federal Form W-4 doesn't substitute for it, since Ohio's exemption structure and school district withholding rules run on their own logic. You don't file the IT 4 with the Department of Taxation; keep it in the employee's personnel file and use it to calculate Ohio and any applicable school district withholding. If an employee never turns one in, withhold as if they claimed zero exemptions.

Step 4: Understand Your SUI Obligation

State Unemployment Insurance (SUI) is an employer-paid tax, not something withheld from wages. New Ohio employers are assigned a standard rate of 2.85% for 2026, applied to the first $9,000 of each employee's wages for the year; construction employers start at 5.85% instead. That rate holds until you've built enough claims history for ODJFS to calculate an experience rate specific to your business.

For 2026 and 2027, contributory employers also owe a separate Technology and Customer Service Fee of 0.15% on the same $9,000 wage base, which funds ODJFS system upgrades and isn't reported as a SUI contribution on your federal Form 940. See our Ohio SUI Rates 2026 guide for the full rate table.

Step 5: Pay Frequency and Final-Pay Rules

Unlike many states, Ohio does set a required pay frequency. Ohio Revised Code 4113.15 requires semimonthly pay: wages earned in the first half of a month must be paid by the first day of the following month, and wages earned in the last half must be paid by the fifteenth. You can pay more often — weekly or biweekly both satisfy the rule — but you can't stretch beyond semimonthly.

If wages go unpaid more than 30 days past the regular payday with no legitimate dispute, the employer owes liquidated damages of 6% of the unpaid amount or $200, whichever is greater. Ohio doesn't require an on-the-spot final check for a terminated or resigning employee; final wages are due on the next regularly scheduled payday. Handle unused PTO according to your written policy, since Ohio treats PTO payout as employer policy rather than statute.

Deposit and Filing Calendar

Once payroll is running, you're managing two deposit tracks side by side: federal and state.

• Federal income tax, Social Security, and Medicare withholding get deposited through EFTPS on a monthly or semiweekly schedule based on your IRS lookback period, then reconciled quarterly on Form 941.
• Ohio withholding follows a schedule set by your combined liability: roughly under $2,000 a year files quarterly, $2,000 to $84,000 remits monthly, and $84,000 or more requires EFT within three banking days of each partial-weekly period.
• SUI wage reports and payments, plus the Technology and Customer Service Fee, go to ODJFS each quarter.
• New hires get reported to ODJFS within 20 days of their start date.

Missing any one of these triggers its own penalty track, so build one shared calendar rather than juggling federal and Ohio deadlines separately.

Year-End: W-2s and Reconciliation

At year-end, issue a W-2 to every employee showing total wages, federal withholding, Social Security and Medicare withholding, and Ohio (plus any school district) withholding. Employees need their copies by January 31, and you'll transmit copies to the Social Security Administration and the Ohio Department of Taxation by the same deadline.

Before finalizing W-2s, reconcile total withholding deposits against what you reported across the year's quarterly filings. Catching a mismatch in December costs an afternoon; catching it in February after employees have filed personal returns costs a lot more.

Frequently Asked Questions

Do I need an EIN before I can pay employees in Ohio?

Yes. You need a federal Employer Identification Number from the IRS before you register with either Ohio agency or run your first payroll. The EIN is free and the IRS issues it immediately when you apply online.

Which state agencies do I register with to run payroll in Ohio?

You register for withholding tax with the Ohio Department of Taxation and for unemployment insurance (SUI) with the Ohio Department of Job and Family Services (ODJFS). Both accounts are required before your first payroll run.

What form do Ohio employees fill out for state withholding?

Ohio employees complete Form IT 4, the Employee's Withholding Exemption Certificate. It is kept in the employee's personnel file rather than filed with the state, and a federal W-4 does not substitute for it.

How often do I have to pay employees in Ohio?

Ohio Revised Code 4113.15 requires semimonthly pay: wages earned during the first half of a month must be paid by the first day of the following month, and wages earned during the last half must be paid by the fifteenth.

When do I have to report a new hire in Ohio?

Ohio law requires you to report every new or rehired employee within 20 days of their start date. Reports go to the Ohio Department of Job and Family Services and can be filed online through oh-newhire.com.

Handling all of this by hand works fine for a one- or two-person payroll, but the calendar gets unforgiving fast once you add employees or your SUI rate shifts. Use our Ohio paycheck calculator to check withholding math and our W-4 helper tool for new-hire federal elections. Payroll software such as Gusto calculates federal and Ohio withholding automatically, files quarterly and annual returns, and handles W-2 delivery so you're not tracking five deadlines in a spreadsheet.