SIPC is backed by the SIPC Fund with contributions from member brokerage firms. The SIPC Fund currently stands at $3.5 billion, and since 2020 has been targeting additional contributions to reach $5 billion. In addition, the U.S. Treasury provides a generous $2.5 billion line of credit. In its 50 years, the SIPC has never needed to tap this line or use taxpayer money to support consumers.