TAX FILING DEADLINE FOR 2025:
ONTARIO TAX RETURNS: April 15, 2026 (Per State of Ohio Tax Commissioner)
Income Tax Information and Forms
Sallie Neal
Income Tax Clerk
Phone: 419-529-3045
Kristy Frost
Asst. Income Tax Clerk
Phone: 419-529-3227
Ashley Sutter
Asst. Income Tax Clerk
Phone: 419-529-2170
555 Stumbo Road
Ontario, OH 44906-1259
Fax: 419-529-6132
Incometax@ontarioohio.org
Business Income Tax Forms
Business
- Business and Professional Questionnaire
- Employer’s Return of Tax Withheld
- Instructions
- Reference Guide
- Employer’s Monthly Return of Tax Withheld (Editable PDF)
- Employer’s Quarterly Return of Tax Withheld (Editable PDF)
- Employer’s Annual Reconciliation
- Quarterly Notice of Installment Due on Estimated Tax Declared
- Application for Extension
Forms
Individual Income Tax Forms
EXEMPTION FORM INFORMATION:
Exemption Form
APPLICATION FOR EXTENSIONS:
Application for Extension
Ordinance 193: Income Tax definitions and code for Ontario
2025
- Instructions for filing 2025 Tax Return
- 2025 General Information
- 2025 Taxable/Nontaxable Income
- 2025 Instructions for filing Tax Return
- 2025 Attachments Instructions
- 2025 Individual – Joint Income Tax Form (Editable PDF)
2024
- Instructions for filing 2024 Tax Return
- 2024 General Information
- 2024 Taxable/Nontaxable Income
- 2024 Instructions for filing Tax Return
- 2024 Attachments Instructions
- 2024 Individual – Joint Income Tax Form (Editable PDF)
2023
- Instructions for filing 2023 Tax Return
- 2023 General Information
- 2023 Taxable/Nontaxable Income
- 2023 Instructions for filing Tax Return
- 2023 Attachments Instructions
- 2023 Individual – Joint Income Tax Form (Editable PDF)
2022
- Instructions for filing 2022 Tax Return
- 2022 General Information
- 2022 Taxable/Nontaxable Income
- 2022 Instructions for filing Tax Return
- 2022 Attachments Instructions
- 2022 Individual – Joint Income Tax Form (Editable PDF)
2021
- Instructions for filing 2021 Tax Return
- 2021 Individual – Joint Income Tax Form (Editable PDF)
2020
- Instructions for filing 2020 Tax Return
- 2020 Individual – Joint Income Tax Form (Editable PDF)
2019
- Instructions for filing 2019 Tax Return
- 2019 Individual – Joint Income Tax Form (Editable PDF)
Interest Rates
Per Am. Sub. HB 5 passed on December 19, 2014 by the Ohio General Assembly, and in accordance with Ohio Revised Code Section 718, we will be publishing our Interest Rates here.
Interest Rates are based on the Federal Short Term Rate published in July, rounded to the nearest whole number plus 5%.
Interest Rate for 2025 is 10% per annum
Interest Rate for 2024 is 10% per annum
Interest Rate for 2023 is 7% per annum
Interest Rate for 2022 is 5% per annum
Interest Rate for 2021 is 5% per annum
Interest Rate for 2020 is 7% per annum
Interest Rate for 2019 is 7% per annum