A new open-access tool, Immunization Financing Resource Guide, is now available for advocates, policymakers, and program managers in low- and middle-income countries. The guide includes 26 briefs, including 8 country case studies, and covers a range of topics such as evaluating the pros and cons of potential sources of financing; understanding and planning for the costs of immunization programs; assessing which vaccines to adopt; getting more value for money through improved purchasing and procurement practices; and building broad political support for these programs. The guide was produced by Results for Development, based on research funded in part by the Bill & Melinda Gates Foundation.