An arrangement, often set up against a GSA Schedule contract, that lets an agency place repeat orders with you without running a new competition each time. It is not an IDIQ: a BPA typically skips the formal ceiling and minimum-guarantee structure and instead just streamlines paperwork for buying that would happen anyway. For a small business, a BPA usually means becoming the easy, pre-approved choice for one buyer's recurring needs.

In a sentence

"A BPA will be established with the awardee for office supplies over the next two years." Winning does not guarantee a dollar amount, only that you become the go-to vendor the buyer can order from without shopping around again.