The General Revenue (GR) Fund is the principal funding source for most Oklahoma government operations. Any revenue that is not restricted for a specific purpose flows into the general fund. The Legislature may direct money out of this fund for any legal purpose of the government.
In Fiscal Year 2017, the biggest contributors to the General Revenue Fund were the individual income tax ($1.881 billion, 38 percent) and sales taxes ($1.850 billion, 38 percent). Dozens of smaller taxes and fees made up the rest. Total General Revenue collections in FY 2017 were $5.0 billion, which was $900 million less than in FY 2007 .
The Legislature can budget up to 95 percent of the estimated General Revenue for the coming year (see Revenue Estimates). In Fiscal Year 2018, 75 percent of the money budgeted by the Legislature came from General Revenue.