Key takeaways
- A return is due on or before the 23rd of the month after the period, and a 23rd that falls on a weekend or legal holiday moves to the next business day.
- Ohio requires electronic filing through the Ohio Business Gateway at gateway.ohio.gov.
- A delivered sale takes the rate where the customer receives it, not the rate at the seller's office.
- An active account needs a return for every period, including periods with zero taxable sales.
Confirm the account and who files
The Department's bulletin dated November 15, 2024 states that taxpayers are required to file sales and use tax returns electronically through the Ohio Business Gateway at gateway.ohio.gov. Plan on online filing for every period.
Confirm that the sales tax account sits on the client's Gateway login and shows the right locations and filing frequency. The Department's January 9, 2025 bulletin says multi-factor authentication is required to access the Gateway, so the login should sit with someone who controls the client's phone or email. For a new account, follow the registration screens on gateway.ohio.gov on the day you set it up, since they change more often than any guide can track.
Filing frequency: monthly by default, assigned by the Department
Under Ohio Revised Code 5739.12(A)(1), the default is a return for each month, due on or before the twenty-third day of the following month. Division (C)(2) lets the commissioner authorize less frequent returns for vendors whose tax liability does not merit monthly returns.
The statute sets no dollar threshold for assigning frequency. Third-party guides quote dollar cutoffs for frequency, but the Revised Code text sets none. Read the frequency from the client's Gateway account and from any notice the Department sent when the account was set up.
Consumer's use tax is a separate account type. The January 9, 2025 bulletin lists Q4 2024 consumer's use tax returns on the same January 23 deadline as the monthly and semi-annual sales tax returns, so a client with a quarterly use tax account needs those periods on the calendar separately.
Decision rule: if the account shows monthly, calendar twelve returns a year. If it shows semi-annual, calendar two, one for January through June and one for July through December. If the client also holds a consumer's use tax account, calendar its quarterly returns on their own line.
2026 due dates, including the weekend rule
These are sales tax periods in calendar 2026, not the tax year 2026 income tax returns that firms prepare in 2027, so label them separately on the tracker. For a monthly account, the September 2026 return is due October 23, 2026, the October 2026 return is due November 23, 2026, and the November 2026 return is due December 23, 2026.
The December 2026 return is due January 23, 2027, which is a Saturday. Ohio Revised Code 1.14 says that when the last day for an act is a Sunday or legal holiday, the act may be done on the next succeeding day that is not Sunday or a legal holiday. That makes Monday, January 25, 2027 the last day for that return, and the same extension applies to the July through December 2026 semi-annual return.
Set Friday, January 22, 2027 as the internal target. The weekend rule is a statutory extension, and a firm that plans around it can end up filing on the last day, when a Gateway outage leaves no room to fix an error. The Department's November 15, 2024 bulletin reported the Gateway and TeleFile were temporarily unavailable from November 29 through December 8 that year.
Find the county and transit rate for each sale
Ohio's state rate is 5.75% under Ohio Revised Code 5739.02(A)(1), and county and transit levies stack on top. Under 5739.033(A), the tax under sections 5739.02, 5739.021, 5739.023 and 5739.026 is measured at one sourcing location for each sale, so the combined rate depends on where the sale is sourced.
Under 5739.033(C)(1), if the customer receives the goods at the seller's place of business, the sale is sourced there. Under 5739.033(C)(2), if the goods are not received there, the sale is sourced to the location where the customer receives them, including the location in the delivery instructions. Pull the ship-to address from the order. The billing address and the warehouse address are not the test.
Use The Finder, the Department's tool at thefinder.tax.ohio.gov. Its Rate Search form takes an address or coordinates, and the page also lists Upload File Search and File Downloads. Search the full ship-to address, not the ZIP code, because a ZIP can straddle a transit district. Save the rate and jurisdiction for each delivered order in the workpaper.
Worked example: a client sells $1,000 of taxable goods delivered to a Franklin County address. The Department's bulletin dated March 12, 2025 says the Franklin County countywide rate rises from 7.5% to 8.0% on April 1, 2025, so a sale delivered on or after that date carries 8.0%, or $80, of tax. The same $1,000 delivered inside Delaware County's COTA District also carries 8.0%, or $80, while delivery outside the COTA District carries 7.0%, or $70. That is why the full address matters.
Each local levy moves in steps of 0.05% under Ohio Revised Code 5739.021(A). A combined local rate that is not a multiple of 0.05% points to a keying error or a superseded table.
File when no taxable sales occurred
An account that is still active needs a return for every period, even with no sales. The Department's January 9, 2025 bulletin states, "Returns must be filed for each period the account is active." Under Ohio Revised Code 5739.13(A), the commissioner may make an assessment against any vendor who fails to file a return or remit the proper amount of tax, so a zero return is an obligation.
The other path is to close the account. The Department's November 15, 2024 bulletin says that if you are not making taxable retail sales or purchases, or if the account is not needed, you should cancel the account by completing the Business Account Update Form and returning it by one of the methods listed on that form.
Decision rule: if the client expects taxable sales again within the year, keep the account open and file a zero return on schedule. If the client has stopped selling taxable goods and will not restart, send the Business Account Update Form and keep calendaring each period until the Gateway shows the account as closed.
Failure mode: a client who stops selling mid-year and assumes the account closes itself. Until the Gateway shows the account as closed, treat each period as due.
Check the return before you submit
Check four things before submitting: the taxable sales for the period, the tax collected by rate, the exempt sales with a certificate on file, and the delivered sales with the ship-to address that set each rate. The return should tie to the sales ledger, not the bank deposits, because deposits include transfers, refunds and card settlements.
The Department's January 9, 2025 bulletin says prior payment information did not carry over to the new platform and tells taxpayers to review and update their payment information. Confirm the bank details on the account before the first payment of the year rather than assuming last year's setup still points where it should.
Keep the confirmation for each period with the period, the date submitted and the amount filed.
Failure modes and how to fix them
Gateway outage in the last week. Fix: file the week before the 23rd and save the confirmation screen. A return filed on the 22nd has room for a second attempt. A return filed on the 23rd does not.
Wrong rate on a delivered sale. The most common error is a rate taken from the warehouse or billing address. Fix: pull the ship-to address for every delivered order and rerun the rate in The Finder for any address near a district line.
Rates from last year's table. Fix: compare the rate's effective date with the Department's bulletin before using it. The April 1, 2025 Franklin County change is an example of a rate that would have been wrong in any table dated before it.