U.S. State Nonresident Withholding Tax is a mandatory prepayment of tax of individuals or entities that are not resident in the state. A common example of this is the taxation of oil and natural gas royalty interest revenue. In order to ensure that the state receives a portion of the revenue from oil and gas leases within the state, any payments made to an address outside of the state require that a tax be withheld and paid directly to the state.