Despite these multiple benefits, the majority of developing countries have yet to seize the growth and development opportunities offered by high-performing health financing. Major coverage gaps for essential health services persist; for those who receive services, coverage is too often ineffective, as the quality of services is low. To expand equitable coverage with both quality services and financial protection, the overall levels of health spending, the mix of revenue sources, pooling, and the efficient and equitable use of resources matter. This report identifies critical health financing constraints.