How to bid on government contracts in Wisconsin

Wisconsin 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.

How to register as a Wisconsin vendor

1. Register for free on the Wisconsin eSupplier Portal.
2. Attach the NIGP codes that match the commodities or services you provide so the system emails you when a matching solicitation is posted.
3. Log into eSupplier to review solicitations and submit responses electronically before the deadline.
4. Also check VendorNet for University of Wisconsin System and municipal solicitations and for current state contracts.

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 Wisconsin's local agencies for you and emails the matches each morning.

Small business and certification programs

• Minority Business Enterprise (MBE) certification: For businesses at least 51% owned, managed and controlled by members of the designated minority groups; the state's goal is 5% of state purchasing.
• Woman-Owned Business Enterprise (WBE) certification: For businesses at least 51% owned, managed and controlled by women; supports state supplier diversity goals.
• Service-Disabled Veteran-Owned Business (DVB) certification: For businesses at least 51% owned, managed and controlled by service-disabled veterans; allows a permissive 5% bid preference on state contracts, with a 1% state purchasing goal.

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

Cities, counties and school districts

Wisconsin municipalities may choose to post solicitations on VendorNet and eSupplier, and registered eSupplier vendors get email notices of those opportunities too.

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 Wisconsin bid in one place.

Tips specific to Wisconsin

• Use only the official question-and-answer period and communicate in writing with the designated contact.
• Watch the posting for amendments until the deadline, and do not alter state forms unless the solicitation allows it.
• Certification applications for MBE, WBE and DVB are filed at https://wisdp.wi.gov/Register.aspx.

Open Wisconsin bids with upcoming deadlines

See all 78 open Wisconsin bids →

What Wisconsin agencies are buying

Open Wisconsin bids on BidsNexus right now, by category:

• Construction: 20 open
• Information Technology: 10 open
• Janitorial & Maintenance: 7 open
• Education & Training: 7 open
• Security & Investigations: 5 open
• Healthcare: 4 open

Next steps

1. Register with the state (above) and, for federal work, in SAM.gov.
2. Find your NAICS codes so you're matched to the right solicitations.
3. Learn how to read an RFP quickly and make a bid/no-bid decision.
4. Set up a free daily alert for Wisconsin in your categories.

Sources

Checked against the state's official pages on September 23, 2026. Rules and portals change, so confirm details on the official site before you register or bid.
https://doa.wi.gov/Pages/StateEmployees/SBOP-Vendors.aspx
https://supplierdiversity.wi.gov/Pages/Home.aspx