Let us help you with your taxes!
For tax preparation assistance, please email your tax documents via the secure email. The City also offers an online tax tool to calculate your taxes or you can print completed forms and attach the appropriate documentation to send in to the Mason Municipal Center. Tax Year 2025 due date is April 15, 2026.
Those under 18 are not required to file a tax return. Please complete declaration of exemption if you have filed before.
Click here for tax forms for individuals.
Click here for business tax information.
calculate your taxes online and file electronically
NEW LOOK & FEATURES!
The Online Tax Tool recently underwent an upgrade. You will now notice a new look and features. Some of the new features include the ability to see the estimates paid, prior year tax returns (beginning tax year 2024 and if filed using the Online Tax Tool), and a messaging system. You will also no longer have to set up your tax account each year. To access your account, please have your account number, social security number and address ready.
Please note that credit card payments cannot be processed through the Online Tax Tool. Only ACH payments are accepted. If you would like to make a payment using a VISA or Mastercard, please contact our office at 513-229-8535 for assistance.
Use our Online Tax Tool to calculate your taxes. Just enter the requested information and the tool will calculate your taxes and complete a tax form for you. Most full-year residents can then file electronically and submit payment via ACH if taxes are due. (Please print a copy for your records.)
If you are not eligible to file electronically, you can print the completed form, sign it and attach the appropriate documentation, and send it in. Please print an extra copy for your records.
let us complete your form
The City of Mason Tax Office staff will be glad to complete your Mason tax return free of charge. TO have your return prepared in person, please bring all the necessary W-2’s (copies are acceptable), your Federal Form 1040 (pages 1 – 2), Schedule 1, and any other applicable federal schedules. Documents may also be dropped off at the customer service counter on the first floor of the Municipal Center, placed in the dropbox located in the half-circle drive outside the Municipal Center, or emailed to the Tax Office staff using the secure e-mail option below.
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(create or use existing account for free secure messages) |
Location and contact information
extended hours
Saturday, April 11 8:00 a.m. to 12:00 p.m.
Wednesday, April 15, 8:00 a.m. to 6:00 p.m.
make quarterly payments electronically
The online tax tool can also be used to make quarterly tax payments and to see your online payments for the year. Payments made before January 15, 2026 that were not made online are included as well.
deadlines
Ninety percent of your 2025 taxes are due by January 15, 2026. The deadline for filing 2025 returns is April 15, 2026. For tax year 2026 quarterly tax payments are due April 15, June 15, September 15, and January 15. (The first quarterly payment is made with your previous year’s tax return.)
tax-supported services
Money from Income taxes is used to support many of the services that contribute to the quality of life in Mason. Some of these include:
- Curbside brush chipping
- Road construction and maintenance
- City park land
- Fall curbside leaf pickup
- Police protection
- Snow and ice control
- City publications
- Traffic signal maintenance
- Utility payment office
- Fish stocking
There are many more benefits to living in the City of Mason than those listed above. Browse through our web site to learn more!