Regardless of how much money is available, how health is financed can have a massive impact on a country’s health system and patient outcomes. Countries at any stage of development can set up national health financing systems to spend available resources more efficiently and equitably to fund and deliver basic services to their populations. In donor dependent settings, CHAI works with governments to identify and address resource gaps and ensure donor funding is allocated to government priorities. In countries that are moving toward aid independence, we work with governments to strengthen institutions and processes to finance the health system from taxes and/or insurance contributions. Across countries, and with a focus on sustainability and institutionalization, CHAI builds government capacity to define and cost priority services or the benefits package to be delivered, to mobilize revenues, and strengthen planning and management systems to deploy funds efficiently.