How to Fill Out Ohio Form U-3: Application for Workers’ Compensation Coverage

Ohio Form U-3 is the application a private employer files with the Ohio Bureau of Workers’ Compensation (BWC) to open a state-fund workers’ compensation policy. You submit it online or by mail with a non-refundable $120 fee, and coverage takes effect the day BWC receives both the completed form and the payment.¹ Most employers can finish the application in one sitting once their documents are together.

Who Has to File

Any person, firm, or private corporation that employs one or more people in Ohio must carry workers’ compensation coverage. The requirement starts with your first hire, whether the worker is full-time, part-time, or casual earning $160 or more per quarter. Household employers hit the same threshold: pay a domestic worker $160 or more in cash in any calendar quarter and you need a policy.²

Out-of-state companies that hire people to perform work inside Ohio also fall under the mandate. Coverage from another state does not satisfy Ohio’s requirement; you need a separate Ohio policy through Form U-3.

Businesses that let coverage lapse or canceled voluntarily use the same form to come back. BWC treats a reinstatement like a new application: pay the $120 fee again, and coverage restarts when the completed form and payment arrive.¹

A few employers do not need this form. Sole proprietors, partnerships, family farm corporations, and single-member LLCs with zero employees are not required to carry coverage, since no one but the owners is on payroll. Hire one paid worker who is not an owner and the requirement kicks in. Very large employers with 500 or more Ohio employees may qualify to self-insure through BWC’s Self-Insuring Employers Evaluation Board rather than filing Form U-3.

What to Gather Before You Start

Pull these together first. Missing pieces will stall the application or get it returned.

Your Federal Employer Identification Number, or your Social Security Number if you are a sole proprietor without an FEIN. BWC uses this to link your policy to federal tax records.¹
Your legal business name exactly as registered with the Ohio Secretary of State. Sole proprietors and partnerships use the owners’ names. The legal name field caps at 40 characters, and you can add a “doing business as” name later in the process if yours runs longer.³
Your entity type: sole proprietor, partnership, corporation, LLC, or other. This determines how the policy is set up.
NCCI classification codes for the work your employees perform. The Bureau classifies workforces using codes maintained by the National Council on Compensation Insurance, each carrying its own rate tied to how hazardous the work is. Employees who do different kinds of jobs may need multiple codes. NCCI publishes a free class look-up tool you can search by job description.⁴⁵
Estimated annual payroll for the coming 12 months, broken out by classification code if your employees fall into more than one. Include wages, salaries, bonuses, and commissions.¹

Classification codes are where most applications go wrong. A landscaping company that also plows snow may need separate codes because the two activities carry different risk profiles. Picking the wrong code throws off your premium and can trigger a later audit with back charges and penalties. If your work does not map cleanly to one description, call BWC and describe what your employees actually do day to day.

Filing Online

Open the Application for Coverage page on the BWC website.³ The portal walks you through the form section by section: entity type, legal name, FEIN, classification codes, and payroll estimates. Pay the $120 application fee by credit card or electronic transfer at the end. Once the system accepts your payment and application, coverage is effective immediately. You do not have to wait for the paper certificate to arrive.

Filing by Mail

Download the PDF version of Form U-3 from the BWC website, complete it, and mail it with a check or money order for $120 to:¹

Ohio Bureau of Workers’ Compensation
P.O. Box 15698
Columbus, OH 43215-0698

Coverage does not begin until BWC physically receives both the completed form and the fee, so build in several business days for delivery. An incomplete application, or one without the $120 fee, comes back unprocessed and your effective date slips further.¹

What Happens After BWC Approves You

BWC assigns you a policy number and issues a Certificate of Ohio Workers’ Compensation. That certificate is your proof of coverage for business licenses, government contract bids, and any contracting partner who asks to verify it.

Your initial premium is calculated from the payroll estimate and classification codes on the application, and you pay it in installments across the policy year. At year end you file a true-up report comparing your estimate to your actual payroll. If actual was higher, you owe the difference; if lower, you get a credit.⁶ Private employers must complete the true-up by August 31 each year through BWC’s Payroll True-Up Report service.

Keep your codes and payroll estimates current during the year. If you take on a new type of work or your headcount changes significantly, contact BWC to update your policy rather than waiting for the true-up. Mid-year adjustments are easier to absorb than a large surprise at year end.

What It Costs to Skip This

Operating without coverage in Ohio is more than a fine. An uninsured employer loses three defenses that would otherwise be available in a personal injury lawsuit: the fellow-servant rule, assumption of risk, and contributory negligence.⁷ An injured employee can sue you directly, and the usual arguments about the worker’s own fault or a coworker’s role are off the table.

BWC can also place a lien on your real and personal property. When an employee files a claim against an uninsured employer, BWC records an affidavit with the county recorder in every county where the employer owns property, and the lien stays in place until the claim is resolved.⁷ Each day you fail to file a required report extends the statute of limitations on an injured worker’s claim by one day, up to an additional two years.

A single uninsured workplace injury can cost more than years of premium. The $120 filing fee on Form U-3 is the cheapest protection an Ohio employer can buy.

1
Ohio Bureau of Workers’ Compensation. Application for Ohio Workers’ Compensation Coverage
2
Ohio Legislative Service Commission. Ohio Code 4123.01 – Workers Compensation Definitions
3
Ohio Bureau of Workers’ Compensation. Application for Coverage U-3
4
Ohio Legislative Service Commission. Ohio Administrative Code 4123-17-08 – Classifications According to National Council on Compensation Insurance
5
NCCI. Class Look-Up
6
Ohio Bureau of Workers’ Compensation. True-Up, Program Changes, and More
7
Ohio Legislative Service Commission. Ohio Code Chapter 4123 – Workers Compensation