Tax Forms

The tax form​s below are provided for your convenience. Before downloading and submitting a tax return form, please verify that you have a current and valid City of Issaquah business license. You may do so by contacting Tax Staff via email or by phone at 425-837-3065 or 425-837-3049.

Business​ & Occupation Tax Forms


Quarterly B & O Tax Return Form
Annual Tax Return Form
Service Income Apportionment Worksheet
Instructions for Service Income Apportionment Worksheet
B & O Tax Penalty and Interest Calculator
2019 and Prior Service Income Apportionment Worksheet

Utility Occupation Tax Forms
Utility Tax License Application
Utility Tax Return Form

Admissions Tax Forms
Admission Tax Business License Application
Admission Tax Return Form

Gambling Tax Forms
Gambling Tax Return Form