The Section 8 Rental Voucher Program increases affordable housing choices for very low-income households by allowing families to choose privately owned rental housing. The public housing authority (PHA) generally pays the landlord the difference between 30 percent of household income and the PHA-determined payment standard-about 80 to 100 percent of the fair market rent (FMR). The rent must be reasonable. The household may choose a unit with a higher rent than the FMR and pay the landlord the difference or choose a lower cost unit and keep the difference.