Tuolumne County requires most businesses operating in unincorporated Twain Harte to obtain a business license and pay annual taxes scaled by business class and gross receipts.
Tuolumne County Code Title 3 imposes a business license tax on businesses operating in the unincorporated area, including Twain Harte. Classifications include retail, service, contractor, professional, and short-term rental, each with its own annual fee structure. Contractors pulling permits in Twain Harte must register and provide proof of state CSLB licensing. Mobile vendors and service providers based outside the county still need a license to operate locally. Online-only home businesses must register if their principal office is in Twain Harte. Failing to register can lead to backdated tax plus penalties.
Operating without a business license, misclassifying activity, or under-reporting receipts triggers back taxes, 25% penalty, and possible permit holds.
See how Twain Harte's business tax classification rules stack up against other locations.
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