Register as a Vendor

Note: Beginning July 31, 2017, the State of Michigan will begin posting bid opportunities on the new SIGMA VSS system. SIGMA VSS will replace Buy4Michigan and Contract and Payment Express, providing one secure location for vendors to respond to solicitations and track payment information. Visit the SIGMA website for more information.
Until July 31, follow these steps to register and bid on solicitations:
1. Buy4Michigan is the official posting site for most State of Michigan solicitations over $10,000. To view current solicitations and register as a State of Michigan vendor, click the icon below (redirects to

Buy4Michigan Logo

Click here for a training on how to register (PDF).

2. Contract & Payment Express

All vendors need to register on the Contract and Payment Express website. The Contract and Payment Express is the State of Michigan's electronic payment system (EFT) and will ensure that you are able to be paid in a timley manner. Processing for this registration is approximately 2 weeks.

Register on the Contract and Payment Express.