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Selling to the State of Wisconsin

Purchasing portal, certifications and where to get help

How a company registers as a supplier with the State of Wisconsin, the state's certification programs, and where to get help in Wisconsin, with the official sources. Federal registrations such as SAM.gov are in the federal guides.

Purchasing portal

eSupplier Portal for Bidders (Wisconsin Department of Administration)

How to register

  1. Go to eSupplier.wi.gov and click the Wisconsin Bidder Portal button.
  2. Create a WAMS ID (the state sign-in account). The Create your WAMS ID link is below the sign-in button on the Bidder Homepage. Click the verification link that WAMS emails you. DOA's eSupplier FAQ says businesses outside the United States can still create a WAMS account: check the "Mailing Address is the same as Residence Address" box, then add the company address later in eSupplier.
  3. Return to eSupplier.wi.gov and sign in with your WAMS username and password.
  4. Click Register, enter your email address and fill in the eSupplier Registration Form. Click Save.
  5. Add at least one NIGP (National Institute of Governmental Purchasing) commodity code. eSupplier then emails you each new solicitation from state agencies and University of Wisconsin System campuses that matches your codes.
  6. Registration is free. The Department of Administration (DOA) says registration on eSupplier is free to all businesses and organizations that want to sell to the state.
  7. Also watch VendorNet (vendornet.wi.gov), where University of Wisconsin System campuses and municipalities that choose to post with the state list solicitations, and the Wisconsin Public Notices site (publicnotices.wi.gov). DOA says no registration or sign-in is needed to view VendorNet bids.
  8. Need help? DOA State Bureau of Procurement: doawispro@wisconsin.gov, (800) 482-7813 (U.S. only) or (608) 264-7897. Technical help with eSupplier: STAR Support, STARSupport@wisconsin.gov or (844) 947-7827.

State certifications

  • Minority Business Enterprise (MBE)Wisconsin Department of Administration, Supplier Diversity ProgramFor-profit businesses at least 51% owned, controlled and actively managed by one or more minority group members (the program lists American Indian, Asian-Indian, Asian-Pacific, Black, Eskimo or Aleut, Hispanic, and Native Hawaiian). The business must already have customers other than the State of Wisconsin and have been formed more than a year before applying. No fees, per the Supplier Diversity FAQ. Certification lasts three years. The FAQ says businesses outside Wisconsin that hold MBE certification from their home state can be certified in Wisconsin; others are reviewed case by case.
  • Woman-Owned Business Enterprise (WBE)Wisconsin Department of Administration, Supplier Diversity ProgramBusinesses at least 51% owned, controlled and actively managed by a woman or women. $150 application fee and $150 recertification fee every three years. DOA says there are no diverse spend goals or bid allowances for WBEs. The Supplier Diversity FAQ says businesses outside Wisconsin can apply only if already WBE-certified in their home state, and they must also have a Wisconsin customer.
  • Service-Disabled Veteran-Owned Business (DVB)Wisconsin Department of Administration, Supplier Diversity ProgramBusinesses at least 51% owned, controlled and actively managed by a service-disabled veteran who lives in Wisconsin, has a DD214 and has a disability rating of at least 0%. The Supplier Diversity FAQ says out-of-state businesses are not eligible. $150 fee for a new application and for recertification every three years. DOA says certified DVBs may receive a permissive 5% bid preference on state contracts.
  • Disadvantaged Business Enterprise (DBE)Wisconsin Department of Transportation (WisDOT)For-profit small businesses at least 51% owned by one or more socially and economically disadvantaged individuals, for contracts funded by the U.S. Department of Transportation (USDOT). Since the USDOT Interim Final Rule took effect October 3, 2025, applicants submit a Personal Narrative showing disadvantage case by case and a Personal Net Worth Statement (limit $2.047 million). Wisconsin-based DBE and ACDBE firms certified under race- or sex-based presumptions must be reevaluated. To apply, register in WisDOT's Vendor Registration System (VRS) with a MyWisconsin ID and email dbe_alert@dot.wi.gov for a secure upload link.

Where to get help in Wisconsin

The federal guides

  • Where to startThe order: the basics, codes and size, SAM.gov, certifications, drone rules, documents, where to sell, and free and low-cost help.
  • SAM.gov registrationThe federal government's free registration for companies that want federal contracts: the Unique Entity ID, the CAGE code and the yearly renewal.
  • Codes and profilesNAICS and PSC codes, SBA size standards, CAGE and NCAGE codes, and the SBA Small Business Search profile buyers search.
  • SBA certificationsThe SBA's 8(a), HUBZone, women-owned (WOSB and EDWOSB) and veteran-owned (VetCert) programs: who each is for and how to apply.
  • Drone complianceThe rules for selling drones to government and flying them: NDAA and the American Security Drone Act, Blue UAS, the FCC, FAA Part 107, ITAR, EAR and CMMC.
  • Documents to prepareWhat government buyers, SBA lenders, SBIR and STTR programs and investors ask to see.
  • Selling to federal buyersWhere federal contracts, subcontracts and research funding are posted: SAM.gov, primes, the GSA schedule, SBIR and STTR, DIU, AFWERX, the Army, the Navy, SOFWERX and DHS.
  • Utilities and public buyersUtilities, HUD-funded agencies, state transportation departments, cities and counties, and cooperative contracts such as Sourcewell and NASPO ValuePoint.
  • Free and low-cost helpAPEX Accelerators, SBDCs, SBA district offices, SCORE, veterans' and women's business centers, MEP centers and agency small business offices.

Official sources

Last checked September 25, 2026. Rules, fees and programs change; the official sources are where to confirm them before applying or spending money.

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