Issaquah, WA · King County
Service Income Apportionment Supplemental Form
This worksheet helps eligible taxpayers calculate the portion of service income apportioned to Issaquah for the city’s service and other B&O tax classification.
What this form is
Taxpayers use this supplemental worksheet when they earn receipts subject to the city’s service and other B&O tax classification and have a taxable presence in more than one jurisdiction. It calculates apportionable gross service receipts, payroll and service-income factors, and Issaquah taxable service receipts. The form asks for business identification and receipt and payroll amounts, with instructions for completing each calculation.
Who needs it
Taxpayers with service and other B&O taxable receipts and a taxable presence in more than one jurisdiction should complete the worksheet.
How to submit it
Submit it to the city department named on the form; check the city website for current contact details.
About notarization
This document is signed without a notary; it contains no notarized or sworn attachment, so the signer just signs and dates it.
How to submit this form
- 1
Download The Form
Download the Service Income Apportionment Supplemental Form.
- 2
Complete The Worksheet
Enter business identification and calculate service receipts, payroll and service-income factors, and Issaquah taxable service receipts.
- 3
Review The Instructions
Use the reverse-side instructions to determine the amounts for each line.
- 4
Submit To The City
Submit it to the city department named on the form; check the city website for current contact details.
Frequently asked questions
- Who should complete the Service Income Apportionment Supplemental Form?
- Taxpayers with gross receipts subject to the city’s service and other B&O tax classification and a taxable presence in more than one jurisdiction should complete it.
- What does the worksheet calculate?
- It calculates apportionable gross service receipts, payroll and service-income factors, and the service receipts taxable in Issaquah.
- Do I need a notary for the Service Income Apportionment Supplemental Form?
- No. This document is signed without a notary and has no notarized or sworn attachment; the signer just signs and dates it.
- How do I submit the Service Income Apportionment Supplemental Form?
- The document lists the Finance Department and its mailing address, but does not specify submission instructions. Check the city website for current contact details.
Need something notarized?
This Service Income Apportionment Supplemental Form doesn’t need a notary — but if you have another Issaquah form that does, a commissioned online notary can help.