USCIS started accepting H-1B petitions subject to the numerical caps starting on April 2, 2012. The number of H-1B petitions submitted subject to the general cap as of May 25 was 48,400 counting toward the 65,000 cap. The number of H-1B petitions subject to the advanced degree cap was 17,500 counting toward the 20,000 cap exemption for individuals with advanced degrees.

At this rate, both H-1B caps could be reached in mid-June. Detailed information is available on USCIS’ H-1B Fiscal Year 2013 Cap Season web page.