Revenue is the money collected by governments. Government cannot provide services we expect without money to pay employees, hire contractors, build facilities and infrastructure, and make payments to people in need. Since state and local governments cannot operate at a deficit (spending more than they take in), the decisions we make about how to collect money have a direct effect on what public services we get. They also affect who shares in the effort of providing public service and how economic decisions are made. This section describes the taxes and other revenue sources of Oklahoma's governments.
State and local governments rely on a wide range of revenues to finance services. When we think of government revenue we usually think of taxes, but they are far from the only important revenue. Services that benefit all citizens are financed at least partly from taxes. Most services, though, generate other revenue sources, like federal funds, insurance trust revenues for retirement and insurance systems, fees or user charges, and utility charges. Each government and each service is financed differently. The mix of revenue depends on service demands, citizens' desired level of taxes, and whether governments provide services that can be funded through federal grants, user charges, or other generated revenue. The mix of revenue changes over time based on dozens of policy decisions we make each year.
Overall, state government collected about $19.7 billion in 2006, while local governments collected $10.9 billion. The figure does not show that local governments received over $3 billion in state aid each year, mainly for education. As a result, spending by state and local governments is much closer to equal than is revenue.

This graph shows the importance of different revenue sources to Oklahoma state and local governments. Both levels of government use a number of different revenue sources, though local governments are more dependent on taxes, user charges, and utilities.