The recent Inflation Reduction Act (IRA), along with the Infrastructure Investment and Jobs Act (IIJA) from last year, allocate more than $25 billion for programs and tax incentives to improve the energy efficiency of, electrify, and reduce greenhouse gas (GHG) emissions from existing homes. Even larger broad GHG emission reduction programs under the IRA could be used for home efficiency. This policy brief summarizes programs that will or could provide significant resources for energy efficiency retrofits for existing single-family and multifamily homes.