Welcome to Vendor Self Service

Welcome to the Katy ISD Vendor Self Service website. New vendors should complete the 7-step process (should take about 5 minutes). Please use UPPER CASE (ALL CAPITALS) on all fields with the exception of your Userid and Password. If you have previously been given a Vendor ID please enter that in the last section at the bottom of the first page along with your FID/SSN. Note the following forms must either be attached or sent to the Purchasing offices prior to any Purchase Orders being issued - W9 & Debarment Form (A blank copy of these forms can be found on the KISD website under Departments > Purchasing)

Policy Update, Effective as of February 5th, 2026:
Users may add themselves as an additional contact to any active vendor in Vendor Self Service (VSS). To do so, a new VSS account must be created and linked to the existing active vendor record. As part of the verification process, a PIN will be sent to the vendor’s original contact on file. That contact must share the PIN with the new user to complete the linking process.