How do I register as a vendor in Michigan?

Register on SIGMA Vendor Self-Service (SIGMA VSS) (https://sigma.michigan.gov/PRDVSS1X1/Advantage4). Register for a free SIGMA VSS account; an account is required to bid on open solicitations.

How to Bid on Government Contracts in Michigan (2026 Guide)

Michigan buys through a central state purchasing office, and its cities, counties and school districts buy on their own as well. To sell to the state you register once as a vendor, then watch for solicitations in your commodity codes and respond by the deadline. This page covers the state registration steps, where bids are posted and the programs that help small businesses, with links to the official pages.

Central purchasing officeState of Michigan Procurement, Department of Technology, Management and Budget (DTMB)

Vendor registrationSIGMA Vendor Self-Service (SIGMA VSS)

Registration feeFree

Where bids are postedThe State of Michigan posts all bid opportunities in SIGMA Vendor Self-Service (https://sigma.michigan.gov/PRDVSS1X1/Advantage4). MiSC solicitations are not publicly posted there.

Open bids right now1,124 open Michigan bids (312 closing this week, 368 new in the last 7 days)

How to register as a Michigan vendor

Register for a free SIGMA VSS account; an account is required to bid on open solicitations.
Add the commodity codes for your goods and services (use DTMB's Commodity Code Lookup page); commodity codes plus email addresses are the only way to get state bid notifications.
Add business types to the profile, which is how vendors become eligible for programs such as MiSC.
Respond to solicitations in SIGMA VSS and keep the profile updated when anything about the company changes.

Registration gets you on the state's list, but it rarely sends you every relevant bid. Many agencies, and most local governments, post on their own portals. A free BidsNexus alert watches the state portal and Michigan's local agencies for you and emails the matches each morning.

Small business and certification programs

Michigan Supplier Community (MiSC): Free for Michigan-based small businesses (under 500 employees and $25M revenue), CROs, veteran or service-disabled veteran-owned businesses, and geographically disadvantaged businesses; agencies can get three quotes and buy directly from MiSC vendors for select purchases up to $500,000.
Service-Disabled Veteran-Owned Business (SDVOB) Preference: Businesses 51% or more owned by service-disabled veterans get up to a 10% pricing preference, claimed in the bid response with DD214, disability, and ownership documents; the state does not pre-certify.

Federal set-asides work differently from state programs; see our guide to small business set-asides.

Cities, counties and school districts

Michigan schools and other local governments also use SIGMA VSS for bids. Through MiDEAL, cities, townships, villages, counties, school districts, universities, colleges and nonprofit hospitals can buy from about 500 state contracts; vendors take part only by holding a state contract.

Local bids are where most small businesses win their first contracts: smaller dollar values, shorter responses and less competition from national firms. BidsNexus collects them into one list, so you can browse every open Michigan bid in one place.

Tips specific to Michigan

Keep commodity codes current: they drive notifications for state bids and for the schools and local governments that use SIGMA VSS.
MiSC opportunities are not publicly posted, so eligible Michigan firms need the right business types in their SIGMA VSS profile to be found.
To claim the SDVOB preference, mark your company as an SDVOB in the bid response and attach the required documents; an NVBDC certification is also accepted under certain conditions.
SIGMA VSS Support Center: SIGMA-Vendor@Michigan.gov or 517-284-0540.