An H1B visa is a temporary work visa foreign workers with a job offer in a specialty occupation in the US. The US immigration legislation caps the number of H1B visas issued to 65,000 per fiscal year (from October 1 to September 30).
Nationals of Chile and Singapore may be eligible to apply for an H1B1 visa to work in the US which is exempt from this cap.
On April 1st, 2016 US Citizenship and Immigration Services (USCIS) will begin accepting H1-B petitions on a first come first served basis. Traditionally, the cap limit is reached very quickly and only those who act in time and apply are able to obtain the visa. Prospective employees of successful H1B petitions will be eligible to start working in the U.S. on October 1, 2016.
If you miss the H1B filing in 2016, you will not have a chance to file a new H1B until April 2017, and your prospective employee will not be able to come to the US under the H1B program until October 1, 2017.
To avoid this unfavourable situation, you are advised to begin planning for the April 2016 filing now, thus ensuring that your H1B petition will be ready to file before April 1st.