Ohio Form CAT 12 is the Commercial Activity Tax Annual Return that every person, business, or unitary group with taxable gross receipts sitused to Ohio above the statutory exclusion must file with the Ohio Department of Taxation. The form reports a full calendar year of Ohio-sourced gross receipts, calculates the 0.26% tax on receipts above the exclusion, applies any credits, and reconciles estimated payments already made through the year.
Getting CAT 12 wrong is expensive. The Ohio Department of Taxation reports that the Commercial Activity Tax generated more than $2.1 billion in fiscal year 2024, and the agency assessed late-filing penalties on roughly 8% of annual returns filed that cycle, with the standard penalty equal to the greater of $50 per month or 5% of the tax due (capped at 50%). Since House Bill 33 restructured the CAT effective January 1, 2024, the exclusion jumped from $1 million to $3 million for tax year 2024 and to $6 million for tax year 2025 and after, which means many small filers no longer owe CAT but still must close out or cancel their account properly on this form.
Here is what this guide covers:
- 📋 What CAT 12 is, who must file it, and which version applies to your tax year
- 🗂️ Every document, ID number, and figure to gather before opening the Ohio Business Gateway
- ✍️ A line-by-line walkthrough of each box, schedule, and signature block on the form
- 👥 Three named, real-world examples filled out from start to finish
- ⚠️ The mistakes that trigger penalties, audits, and account holds — and how to avoid them
What the Form Is and Who Must File It
Ohio Form CAT 12 is the annual reconciliation return for the Commercial Activity Tax, a privilege tax imposed under Ohio Revised Code Chapter 5751 on the privilege of doing business in Ohio. The tax is measured by taxable gross receipts sitused to Ohio, not by net income, which makes it different from the Ohio personal income tax and from the federal corporate income tax. The current form revision is CAT 12 (Rev. 11/24), which is the version you must use for tax year 2025 returns filed in 2026, and you can confirm the revision date in the lower-left corner of the printed PDF on the Department’s CAT forms page.
Who files depends on the tax year. For tax year 2024, any person with more than $3 million in taxable Ohio gross receipts must file CAT 12. For tax year 2025 and after, the threshold rises to $6 million under H.B. 33. Persons under the threshold are not required to file, but if you were registered for CAT and dropped below the threshold, you should cancel your account using Form CAT CS through the Ohio Business Gateway to stop receiving notices.
The term person is broad. It covers sole proprietors, partnerships, LLCs, S corporations, C corporations, disregarded entities, trusts, and joint ventures. Out-of-state sellers with bright-line nexus — meaning at least $500,000 of Ohio receipts, $50,000 of Ohio property, $50,000 of Ohio payroll, or 25% of total property, payroll, or sales in Ohio — also file, under the rules in ORC 5751.01(I). Federal income tax filing status does not control CAT filing; a corporation that files a federal consolidated 1120 may still file CAT on a separate-entity, combined, or consolidated basis depending on its election.
Before You Start: Documents and Information You Need
Gather every document below before you open the Gateway, because the Ohio Business Gateway times out after 30 minutes of inactivity and partial returns are not saved. Aisha, a Columbus boutique owner, lost her draft three times last year by stopping to dig for a 1099 mid-filing; do not be Aisha.
- CAT account number. This is your 8-digit number assigned at registration, found on prior CAT confirmations or by searching the Ohio Business Gateway account list. Without it, the return will not match to your account and will be rejected.
- Federal Employer Identification Number (FEIN) or Social Security Number. The Department cross-checks this against IRS records, and a mismatch triggers a manual review hold.
- Gross receipts ledger for the full calendar year. Pull this from QuickBooks, Xero, or your point-of-sale system. CAT is reported on a calendar-year basis even if your federal return uses a fiscal year.
- Ohio situsing workpapers. You need a schedule that breaks total receipts into Ohio and non-Ohio buckets using the situsing rules in ORC 5751.033.
- Excluded-receipts schedule. This documents items that are not gross receipts under ORC 5751.01(F)(2) — for example, interest (other than from credit sales), dividends, capital gains, and the receipts of agents acting on behalf of others.
- Estimated payment confirmations. Print or download the four quarterly CAT estimated payment confirmations (if you made any) from the Gateway, since you will subtract these on the reconciliation line.
- Credit certificates. Job Creation Tax Credit certificates, Job Retention Tax Credit certificates, and Research and Development Loan Repayment Credit certificates issued by the Ohio Development Services Agency must be attached to Schedule CR.
- Combined or consolidated election letter. If your group is filing as a combined or consolidated taxpayer, keep the original election letter and the current member list with FEINs.
- Banking information. You need your routing number and account number for ACH debit through the Gateway, or your credit card for ACH credit (a 2.5% convenience fee applies).
- Prior year CAT 12. Use last year’s return to confirm carryover credits and to spot year-over-year swings the Department’s audit screen flags automatically.
Where to Get the Form and How to Access It
The official PDF of Form CAT 12 lives on the Ohio Department of Taxation’s forms portal. You can also reach a fillable version inside the Ohio Business Gateway once you log in, navigate to Commercial Activity Tax, and choose Annual Return. The Gateway version auto-populates your account number, mailing address, and prior-year information, which removes about a third of the error risk.
For practitioners filing on behalf of multiple clients, the OH|TAX eServices platform offers a bulk upload option that accepts an XML schema published by the Department. The XML schema is updated each November, so confirm you are using the current year’s schema before uploading or the file will reject silently. Paper filing is technically still available by mailing Form CAT 12 to Ohio Department of Taxation, P.O. Box 16158, Columbus, OH 43216-6158, but paper returns process in 8 to 12 weeks compared to 3 to 5 business days for electronic returns.
If you cannot access the Gateway because you lost your OH|ID credentials, call the Department’s Business Tax Division at 1-888-722-8829 between 8:00 a.m. and 5:00 p.m. Eastern Time, Monday through Friday. They will verify your identity using your FEIN, last filed return, and registered address, then reset your access within one business day. Do not email your credentials to anyone claiming to be from the Department, because the agency never asks for passwords by email.
Step-by-Step: How to Fill Out CAT 12 Line by Line
This is the spine of the return. Work through each field in order, because later lines pull from earlier ones, and skipping ahead causes math errors that the Gateway will flag at submission.
Header — Taxpayer Name
This field asks for the full legal name of the person filing the return. Enter the name exactly as it appears on your IRS EIN confirmation letter (CP 575) or, for sole proprietors, on your Social Security card. Marcus Bell writes Bell Hardware LLC because that is the name on his Articles of Organization filed with the Ohio Secretary of State. If you use a DBA, enter the legal name here and the DBA on the next line, not the other way around. The most common mistake is entering the DBA in the legal-name box, which causes the Department’s match algorithm to fail and the return to suspend pending manual review. A misconception filers carry is that punctuation does not matter; in fact, Bell Hardware, LLC (with comma) and Bell Hardware LLC (without) are treated as different strings by the Department’s system, so match exactly to the EIN letter.
Header — CAT Account Number
This field asks for your 8-digit Ohio CAT account number, not your FEIN. Enter the number with no spaces or dashes, all digits, in the box at the top right of page 1. Bell Hardware LLC enters 99123456, which appears on every Department notice it has received since registering in 2019. If you have lost the number, look it up using the Ohio Business Gateway account search before filing, because entering the FEIN in this box routes the return to the wrong account and creates a duplicate-filing flag. A common mistake is transposing two digits, which causes the payment to apply to a different taxpayer’s account and triggers a non-filer notice 60 days later. The misconception that the FEIN and CAT number are interchangeable costs filers hours of correspondence; they are different numbers issued by different systems.
Header — FEIN or SSN
This field asks for the federal identification number that ties this return to your federal records. Enter the FEIN in XX-XXXXXXX format for entities, or the SSN in XXX-XX-XXXX format for sole proprietors. Janet Ortega, who runs her consulting practice as a sole proprietor, enters 123-45-6789 because she never obtained an EIN. If you are a single-member LLC that elected disregarded-entity treatment, use the owner’s identifying number, not the LLC’s EIN, to match IRS records. The common mistake is mixing the two formats (entering an SSN where the FEIN belongs), which causes IRS cross-match to fail. A misconception is that the CAT only uses your Ohio numbers; in practice, the federal number is the primary key the Department uses to validate identity.
Header — Reporting Period
This field asks for the calendar year being reported. Enter the four-digit year in the format 2025 for a tax year 2025 return filed in 2026. Bell Hardware LLC writes 2025. Even if your federal fiscal year ends on June 30, the CAT reporting period is always January 1 through December 31, under ORC 5751.011. The common mistake is entering the filing year (2026) instead of the tax year (2025), which causes the payment to apply to the wrong period and triggers a delinquency notice for the prior year. The misconception that you can file on a fiscal-year basis is one of the top three errors flagged by the Department’s pre-2024 audit data.
Box 1 — Taxable Gross Receipts (from Schedule A, Line 7)
This field asks for your total Ohio taxable gross receipts for the calendar year, after exclusions and situsing. Pull this number directly from Schedule A, Line 7 — do not retype it. Carlos Ramirez, the e-commerce seller, enters $4,250,000, which is the Ohio-sitused portion of his $11.8 million national sales. If Schedule A is blank, Box 1 must still be filled with $0, not left empty, because the Gateway treats empty fields as errors. The common mistake is entering gross receipts everywhere (national total) rather than Ohio taxable gross receipts (the much smaller, sitused number); this overstates tax by orders of magnitude. The misconception that all sales to Ohio customers are Ohio gross receipts is wrong — services are sitused to where the purchaser receives the benefit, which is not always the buyer’s billing address.
Box 2 — Exclusion Amount
This field asks for the statutory exclusion that applies to your tax year. Enter $3,000,000 for tax year 2024 and $6,000,000 for tax year 2025 and after, per H.B. 33. Carlos Ramirez enters $6,000,000 on his 2025 return. The exclusion is per taxpayer, not per entity within a combined or consolidated group, which is why groups must allocate carefully on the member schedule. The common mistake is using the old $1,000,000 exclusion that applied before 2024, which overstates tax by $13,000 at the 0.26% rate. The misconception that the exclusion is prorated for short tax years is wrong for annual filers; the full exclusion applies as long as the person was subject to CAT for any part of the year.
Box 3 — Net Taxable Gross Receipts
This field asks you to subtract Box 2 from Box 1. If the result is zero or negative, enter $0; you cannot have negative taxable receipts. Carlos Ramirez subtracts $6,000,000 from $4,250,000 and gets a negative number, so he enters $0 and owes no tax for 2025. The common mistake is entering the difference as a negative number, which the Gateway rejects. The misconception that negative net receipts produce a refund or a carryforward is wrong; the CAT has no net operating loss concept.
Box 4 — Tax Due (Box 3 × 0.0026)
This field asks for the 0.26% tax on net taxable gross receipts. Multiply Box 3 by 0.0026 and round to the nearest dollar. Janet Ortega, with net taxable gross receipts of $850,000 on her 2024 return (when the exclusion was $3M but she had $3.85M of Ohio receipts), enters $2,210. The common mistake is multiplying by 0.026 (the 2.6% rate that does not exist) or by 0.0026 against the gross number rather than the net number, both of which inflate tax tenfold or more. The misconception that the rate changed under H.B. 33 is wrong; only the exclusion changed, not the 0.26% rate.
Box 5 — Nonrefundable Credits (from Schedule CR)
This field asks for the sum of nonrefundable credits you are claiming, from Schedule CR, Line 10. Common credits include the Job Retention Tax Credit, the Job Creation Tax Credit (nonrefundable portion), and the Research and Development Loan Repayment Credit. Bell Hardware LLC has no credits and enters $0. The common mistake is claiming a credit without attaching the certificate from the Ohio Development Services Agency, which causes the credit to be disallowed on audit. The misconception that all CAT credits are refundable is wrong; most are nonrefundable and limited to the tax shown on Box 4.
Box 6 — Net Tax Due (Box 4 minus Box 5)
This field asks you to subtract credits from tax. Enter the result, or $0 if credits exceed tax. Janet Ortega subtracts $0 from $2,210 and enters $2,210. The common mistake is forgetting to apply a credit you legitimately earned, which causes you to overpay; the Department will not retroactively apply unclaimed credits without an amended return. The misconception that credits roll over indefinitely depends on the specific credit’s statute — read the credit’s enabling section in ORC Chapter 5751 for the carryforward period.
Box 7 — Refundable Credits
This field asks for refundable credits such as the refundable portion of the Job Creation Tax Credit. Enter the amount from your credit certificate. Carlos Ramirez has a $5,000 refundable JCTC and enters $5,000 even though his tax in Box 6 is zero, because refundable credits generate a refund. The common mistake is treating a nonrefundable credit as refundable, which generates an overstated refund claim that the Department disallows on examination. The misconception that you can convert nonrefundable credits to refundable by waiting is wrong; the character of the credit is set by the statute that creates it.
Box 8 — Estimated Payments Made
This field asks for the total of all quarterly estimated payments you made for the tax year. Pull this number from the Gateway’s payment history report and confirm against your bank statements. Bell Hardware LLC made four payments of $1,500 each and enters $6,000. The common mistake is including payments made for the prior year that were applied as a credit, which double-counts them; only payments designated for the current tax year belong here. The misconception that the Department automatically pulls this number from its system is partially true — the Gateway pre-fills it, but you must reconcile to your own records because mis-coded payments are common.
Box 9 — Balance Due or Overpayment
This field asks for the final reconciliation — subtract Box 7 and Box 8 from Box 6. A positive number is balance due; a negative number is your overpayment. Janet Ortega subtracts $2,400 of estimates and $0 of refundable credits from $2,210 of net tax, producing an overpayment of $190. The common mistake is reversing the sign, which causes filers to send a payment when they are owed a refund. The misconception that small overpayments are not worth claiming is wrong; the Department does not automatically refund and does not roll over without a request, so claim every dollar.
Schedule A — Calculation of Taxable Gross Receipts
Schedule A is the workhorse of the return. Line 1 is total gross receipts everywhere from all sources. Line 2 lists statutory exclusions under ORC 5751.01(F)(2) such as interest, dividends, and agency receipts. Line 3 is gross receipts after exclusions. Lines 4 and 5 apply the situsing rules in ORC 5751.033 — tangible property is sitused where delivered, services where the purchaser receives the benefit, real property where located, and intangibles where used. Line 6 is any additional Ohio adjustments. Line 7 is Ohio taxable gross receipts, which flows to Box 1 on page 1. The most common Schedule A error is mis-situsing services using the customer’s billing address rather than the place of benefit, which the Department audits closely on remote sellers.
Schedule CR — Credits
Schedule CR lists each credit you are claiming on a separate line, with the certificate number, issuing agency, and amount. Line 1 is the Job Retention Tax Credit. Line 2 is the nonrefundable Job Creation Tax Credit. Line 3 is the R&D Loan Repayment Credit. Lines 4 through 9 cover less common credits. Line 10 is the total, which flows to Box 5. Attach a copy of each credit certificate as a PDF in the Gateway upload step, because the Department disallows credits without supporting documentation 100% of the time on first review.
Signature Block
This field asks for the signature, printed name, title, date, and phone number of an officer, owner, or authorized agent. Type the name in the Gateway’s signature box, which counts as an electronic signature under ORC 1306.06. Marcus Bell signs as Marcus Bell, Managing Member, 03/15/2026, 614-555-0142. The common mistake is having an unauthorized employee sign — the Department requires an officer, owner, partner, member, or holder of a Power of Attorney on file via Form TBOR 1. The misconception that the preparer can sign for the taxpayer is wrong; the preparer signs the preparer block, not the taxpayer block.
Three Filled-Out Examples Using Real Scenarios
Example 1: Bell Hardware LLC — Small Ohio Retailer
Marcus Bell operates a single-location hardware store in Dayton with $4.1 million in 2025 receipts, all Ohio-sourced.
| Form Section | What Marcus Enters |
|---|---|
| Taxpayer Name | Bell Hardware LLC |
| CAT Account Number | 99123456 |
| FEIN | 31-1234567 |
| Reporting Period | 2025 |
| Schedule A, Line 1 | $4,100,000 |
| Schedule A, Line 7 | $4,100,000 |
| Box 1 — Taxable Gross Receipts | $4,100,000 |
| Box 2 — Exclusion | $6,000,000 |
| Box 3 — Net Taxable Gross Receipts | $0 |
| Box 4 — Tax Due | $0 |
| Box 8 — Estimated Payments Made | $0 |
| Box 9 — Balance / Overpayment | $0 |
| Signature | Marcus Bell, Managing Member, 03/15/2026 |
Example 2: Ramirez Direct Inc. — Multi-State E-Commerce Seller
Carlos Ramirez runs a Nevada-based e-commerce company with $11.8 million in national sales and $4.25 million sitused to Ohio under the destination-delivery rule for tangible goods.
| Form Section | What Carlos Enters |
|---|---|
| Taxpayer Name | Ramirez Direct Inc. |
| CAT Account Number | 99876543 |
| FEIN | 88-7654321 |
| Reporting Period | 2025 |
| Schedule A, Line 1 | $11,800,000 |
| Schedule A, Line 4 (Ohio Situsing) | $4,250,000 |
| Schedule A, Line 7 | $4,250,000 |
| Box 1 — Taxable Gross Receipts | $4,250,000 |
| Box 2 — Exclusion | $6,000,000 |
| Box 3 — Net Taxable Gross Receipts | $0 |
| Box 7 — Refundable Credits (JCTC) | $5,000 |
| Box 8 — Estimated Payments Made | $0 |
| Box 9 — Overpayment | ($5,000) |
| Signature | Carlos Ramirez, President, 04/02/2026 |
Example 3: Ortega Consulting Group — Combined Taxpayer (Tax Year 2024)
Janet Ortega’s consulting group filed a 2024 combined return covering three related LLCs with $3.85 million of combined Ohio receipts, using the $3 million 2024 exclusion.
| Form Section | What Janet Enters |
|---|---|
| Taxpayer Name | Ortega Consulting Group (Combined) |
| CAT Account Number | 99555000 |
| FEIN (Reporting Entity) | 46-9988776 |
| Reporting Period | 2024 |
| Schedule A, Line 1 (all members) | $5,200,000 |
| Schedule A, Line 4 (Ohio Situsing) | $3,850,000 |
| Schedule A, Line 7 | $3,850,000 |
| Box 1 — Taxable Gross Receipts | $3,850,000 |
| Box 2 — Exclusion (2024) | $3,000,000 |
| Box 3 — Net Taxable Gross Receipts | $850,000 |
| Box 4 — Tax Due (0.26%) | $2,210 |
| Box 8 — Estimated Payments Made | $2,400 |
| Box 9 — Overpayment | ($190) |
| Signature | Janet Ortega, Managing Member, 04/10/2025 |
How to File the Completed Form
Online through the Ohio Business Gateway is the primary channel. Log in at gateway.ohio.gov using your OH|ID, select Commercial Activity Tax → Annual Return, complete the form, upload PDF attachments for credits, and submit. There is no filing fee. Payment is by ACH debit (free) or credit card (2.5% convenience fee through the third-party processor). Processing time is 3 to 5 business days. Keep the confirmation number and the PDF copy the Gateway emails you; that is your proof of filing.
OH|TAX eServices bulk upload is for practitioners filing 10+ returns. Format your XML using the current schema from tax.ohio.gov, upload through the eServices portal, and pay each return individually by ACH debit. Processing is also 3 to 5 business days, and confirmation arrives by email per return.
Paper filing is allowed but discouraged. Mail the signed original CAT 12 plus credit certificate copies and a check payable to Ohio Treasurer of State to Ohio Department of Taxation, P.O. Box 16158, Columbus, OH 43216-6158. Use certified mail with return receipt as your proof of filing, because the postmark controls the filing date under ORC 5703.056. Processing time is 8 to 12 weeks.
TeleFile is not available for CAT 12. Do not attempt to file by phone. Fax filing is also not accepted by the Department for CAT returns.
The annual deadline is May 10 following the close of the calendar year. If May 10 falls on a Saturday, Sunday, or legal holiday, the deadline shifts to the next business day. Extensions of time to file are not available for CAT, although extensions of time to pay may be granted in hardship cases on written request.
What Happens After You File
Within 3 to 5 business days of an electronic filing, the Department’s system runs automated validation — matching your FEIN, CAT account number, prior-year figures, and estimated payment history. If the return clears validation, you receive a filing acceptance email. If something is off, you receive a billing notice or a request-for-information letter asking for documentation, typically Schedule A workpapers or credit certificates.
Refunds for overpayments are issued by paper check to the address on file within 60 to 90 days under the standard processing schedule, or by direct deposit if you elected that option on the return. Interest on refunds accrues from the later of the original due date or the actual payment date, at the statutory rate published annually by the Department.
If you are audited, the Department’s audit cycle for CAT typically begins 18 to 24 months after filing. The four-year statute of limitations in ORC 5751.09 runs from the later of the due date or the filing date, so a 2025 return filed timely on May 10, 2026 is open through May 10, 2030. Keep your Schedule A workpapers, customer ship-to records, and credit certificates for at least seven years.
Mistakes to Avoid When Filling Out the Form
- Using the wrong exclusion amount. Mixing up the $1M (pre-2024), $3M (2024), and $6M (2025+) exclusions causes a misstatement that triggers a billing notice within 60 days.
- Situsing services to the customer’s billing address. Services must be sitused where the benefit is received under ORC 5751.033(I), and getting this wrong is the #1 audit adjustment.
- Filing on a fiscal year. CAT is always calendar year; a fiscal-year return creates a delinquency for the calendar year and a duplicate filing flag.
- Entering the FEIN in the CAT account number box. This routes the payment to the wrong account and produces a non-filer notice.
- Skipping Schedule A. Box 1 must flow from Schedule A; entering Box 1 directly without completing Schedule A causes the return to suspend.
- Claiming a credit without the certificate. The Department disallows undocumented credits 100% of the time on first review.
- Forgetting refundable credits when tax is zero. Refundable credits generate refunds even when Box 6 is $0; leaving them off costs real money.
- Double-counting estimated payments. Including prior-year payments that were credited forward inflates Box 8 and triggers a correction notice.
- Letting the wrong person sign. Only an officer, owner, partner, member, or POA-authorized agent may sign; unauthorized signatures invalidate the return.
- Missing the May 10 deadline. The late-filing penalty is the greater of $50 per month or 5% of tax due, capped at 50%, under ORC 5751.06.
- Forgetting to cancel after dropping below the threshold. If you fall under $6M, file Form CAT CS to cancel, or you keep receiving non-filer notices for years.
Do’s and Don’ts
Do’s
- Do confirm you are using the CAT 12 (Rev. 11/24) version printed in the lower-left of the PDF, because older revisions reject in the Gateway.
- Do reconcile Box 8 to your bank statements before filing, because Gateway pre-fill is sometimes off by one payment.
- Do attach every credit certificate as a separate PDF, because combined PDFs sometimes fail the size check.
- Do file electronically through gateway.ohio.gov for 3-to-5-day processing instead of 8-to-12 weeks on paper.
- Do save the confirmation number to your tax file the moment it appears, because the Gateway only emails it once.
- Do situs each revenue stream separately using ORC 5751.033 rather than applying one rule to all sales.
Don’ts
- Don’t use the old $1,000,000 exclusion; it has been gone since January 1, 2024.
- Don’t sign the return as the preparer if you are the taxpayer, because the signature blocks are not interchangeable.
- Don’t file by fax or phone; neither channel is accepted for CAT 12.
- Don’t ignore a request-for-information letter, because non-response converts the request into a Department-best-estimate assessment.
- Don’t round to the nearest thousand; round only to the nearest dollar, per Department instructions.
- Don’t assume your federal consolidated group equals your CAT consolidated group; the elections are independent.
Pros and Cons of Filing on Your Own vs. With Help
Pros of Filing on Your Own
- You save the $400 to $1,500 a CPA typically charges for a CAT 12, which is significant for thin-margin businesses.
- You build first-hand familiarity with the situsing rules, which helps you price contracts and plan future filings.
- You control the timing and do not depend on a preparer’s calendar around the May 10 deadline.
- You keep the records in-house, which makes responding to audit questions faster.
- You avoid the e-file authorization paperwork that practitioners require, which trims a day off the cycle.
Cons of Filing on Your Own
- You bear 100% of the risk of an error, with no preparer penalty protection under Circular 230 or state analogs.
- You may miss credits a specialist would catch, including the Job Creation Tax Credit and R&D Loan Repayment Credit.
- You spend 10 to 20 hours on a return a specialist would complete in 2 to 4 hours.
- You may misapply situsing rules and overpay by thousands without knowing it.
- You have no professional to represent you in an audit, which means you handle Department correspondence yourself.
Filing Channels Compared
| Filing Channel | Key Details |
|---|---|
| Ohio Business Gateway | Free, 3–5 business day processing, ACH or credit card, email confirmation |
| OH | TAX eServices Bulk |
| Paper Mail | Free, 8–12 week processing, certified mail recommended, check payable to Ohio Treasurer of State |
| TeleFile / Fax | Not available for CAT 12 |
Pre-2024 vs. Current CAT Structure
| Feature | Pre-2024 | 2024+ |
|---|---|---|
| Exclusion | $1,000,000 | $3,000,000 (2024) / $6,000,000 (2025+) |
| Annual Minimum Tax | $150 to $2,600 (tiered) | $0 |
| Tax Rate Above Exclusion | 0.26% | 0.26% |
| Filing Frequency for Most | Quarterly or Annual | Annual (most) |
| Authority | ORC 5751 (original) | ORC 5751 as amended by H.B. 33 |
FAQs
Do I still need to file CAT 12 if my Ohio receipts are under $6 million?
No. For tax year 2025 and after, persons with $6,000,000 or less in Ohio taxable gross receipts are not required to file CAT 12, but should cancel registration via Form CAT CS to stop notices.
Is the CAT a sales tax?
No. The CAT is a privilege tax on gross receipts under ORC Chapter 5751, separate from Ohio sales and use tax, and it is paid by the seller, not collected from the buyer.
Can I file CAT 12 on a fiscal year?
No. CAT is always reported on a calendar-year basis under ORC 5751.011, regardless of your federal fiscal year-end.
Do I write my FEIN or my CAT account number in the top-right box?
No. That box wants the 8-digit CAT account number, not the FEIN; the FEIN goes in the separate federal identification field below the name.
Does Box 2 (Exclusion) change for short tax years?
No. The full statutory exclusion applies for any person subject to CAT for any portion of the year; it is not prorated for annual filers.
Should I include excluded receipts on Schedule A, Line 1?
Yes. Line 1 is total gross receipts before exclusions; statutory exclusions like interest and dividends come off on Line 2.
Can I sign the return as the preparer instead of the taxpayer?
No. The taxpayer signature must come from an officer, owner, partner, member, or holder of a Power of Attorney on Form TBOR 1; the preparer signs a separate block.
Is there an extension of time to file CAT 12?
No. Ohio does not grant filing extensions for CAT; an extension to pay may be requested in hardship cases but does not stop interest accrual.
Are out-of-state sellers required to file CAT 12?
Yes. Sellers meeting bright-line nexus under ORC 5751.01(I) — including $500,000 of Ohio receipts — must register and file, even with no Ohio physical presence.
Do estimated payments still apply under the new $6M exclusion?
No. Most small filers have no annual CAT liability and need not pay estimates, but larger filers above $6M still owe quarterly estimates under ORC 5751.05.
Can I e-file CAT 12 through TurboTax or other federal software?
No. CAT 12 is filed through the Ohio Business Gateway or OH|TAX eServices only; federal tax software does not transmit Ohio CAT returns.
Will I get a refund automatically if Box 9 shows an overpayment?
Yes. The Department issues refunds for overpayments within 60 to 90 days, by paper check to the address on file or by direct deposit if elected on the return.
What is the penalty for filing CAT 12 late?
Yes, there is a penalty: the greater of $50 per month or 5% of the tax due per month, capped at 50% of the tax due, under ORC 5751.06, plus statutory interest.
Can I amend a CAT 12 after filing?
Yes. File an amended return through the Ohio Business Gateway within four years of the original due date, marking the Amended box and attaching an explanation of changes.
Related reading
- How to Fill Out Ohio Form CAT-CS (w/Examples) + FAQs
- How to Fill Out Ohio Form CAT FF (w/Examples) + FAQs
- How to Fill Out Ohio Form IT-1040ES (w/Examples) + FAQs
- How to Fill Out Ohio Form IT-1140 (w/Examples) + FAQs
- How to Fill Out Ohio Form IT-4708 (w/Examples) + FAQs
- How to Fill Out Ohio Form IT-941 (w/Examples) + FAQs