H-2B supplemental cap petitions. USCIS indicated that delays in receipt issuance of H-2Bs were due to a recent influx of FY2023 supplemental cap filings. Stay tuned for more information. The spouse and children of H-2B workers classified as H-4 nonimmigrants also do not count against this H-2B supplemental cap petitions. Currently, Congress has set the H-2B cap at 66,000 per fiscal year, with 33,000 for workers who begin employment in the first half of the fiscal year (Oct. 1 – March 31) and 33,000 for workers who begin employment in the second half of the fiscal year (April 1 – Sept. 30).