The 188C Significant Investor Provisional Visa (Significant Investor Stream) is one of the categories under the Australian Business Migration 188 visa. It is specifically designed for high-net-worth individuals who are willing to invest at least AUD 5 million in Australia. This visa is suitable for applicants who wish to maintain business and investment activities in the country.

Applicants must obtain a nomination from an Australian state or territory government or be nominated by the Australian Trade and Investment Commission (Austrade) on behalf of the Australian government. Holding the 188C visa is the first step toward applying for the Business Innovation and Investment (Permanent) Visa (888 visa).

The visa was originally valid for 4 years and 3 months; however, as of July 1, 2021, the validity period has been extended to 5 years. If applicants require additional time to meet the 888 visa requirements, they can apply for a visa extension to prolong their stay in Australia. Holders of the 188C provisional visa can apply for an extension of up to 4 years, bringing the total maximum visa validity to 8 years.