Program income is income you earn as a direct result of activities supported under the grant. For example, if you developed cyber security training materials with grant funds and charge your voting districts for them, the funds you receive in payment are program income. Net program income is the amount of income remaining after deducting the costs of providing the materials to voting districts, such as shipping costs. Program income must be reported in the Program Income section of the FFR on lines 10 L - O.
See also “Where do we report interest earned on the federal share?”