Rock County does not impose a county-wide room tax. Wis. Stat. §66.0615 authorizes only municipalities (cities, towns, villages) to levy room tax. STR operators must pay state sales tax and obtain a Tourist Rooming House license issued by Rock County Public Health as DATCP agent.
Wis. Stat. §66.0615(1m) reserves room-tax authority to municipalities, not counties, so Rock County itself does not collect a county-wide lodging tax. Rentals inside Janesville or Beloit are subject to those cities' room tax ordinances; rentals in unincorporated towns are subject only to the town's room tax (if adopted). All STR hosts statewide must collect Wisconsin state sales tax and the 0.5% Rock County sales tax on lodging stays under 30 days. Anyone operating an STR more than 10 nights per year must hold a Tourist Rooming House license under Wis. Admin. Code ATCP 72, issued locally by Rock County Public Health, which acts as the DATCP-contract agent for hotels, motels, B&Bs, and TRHs in the county. Confirm current TRH license fees with Rock County Public Health.
Operating without a TRH license can trigger forfeitures under ATCP 72 and Wis. Stat. ch. 97. Failure to remit applicable municipal room tax exposes hosts to back taxes, interest, and penalties under Wis. Stat. §66.0615.
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Rock County, WI
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