There are several ways that you can receive an H-1B extension after 3 years:
A. 1 year H-1B Extension
The foreign professional may apply for an H-1B extension past 6 years in one-year intervals. This can occur if the PERM petition or the I-140 was filed 365 days before the 6-year expiration date.
B. 3 year H-1B Extension
The foreign professional is able to apply for an H-1B visa extension status for up to 3 years if the applicant has an approved I-140 petition for the EB-1, EB-2 or EB-3 employment-based green card classifications and the immigrant visa number is unavailable. For H1B Visa Process Visit UT Evaluators
This is usually granted so that beneficiaries do not have to return home while they wait for their priority dates to become current. Because some people must wait over a decade for an EB-3 immigrant visa number to become available, this H-1B extension can be very helpful.
C. “Recapture” Time
Many H-1B holders decide to travel internationally for extended periods of time. “Recapturing” that time spent abroad is one way to be granted an H-1B visa extension. The foreign professional may request an H-1B extension if he/she traveled outside the United States during the validity of the visa. The applicant is obligated to submit U.S. entry and return dates, I-94 copies, and related stamps.
Here is an example: If Sue, an H-1B worker, visits her home country of Germany for a total of two months during her stay in the U.S., she may be eligible for an H-1B extension of two months past the normal 6-year limit provided that she can give evidence of her departure.
Fortunately, you are able to use the optional premium processing service to expedite your new petition’s processing time to 15 calendar days. Once you have been counted against the cap, you are no longer bound by the lottery dates (i.e. April 1st and October 1st). This means that using premium processing for an H-1B extension may be much more beneficial to your case than it would be if you were filing in the cap, where the mandatory six-month waiting period to start work usually renders premium processing obsolete.For H1B Visa Process Check here
To take advantage of this service, you will need to file an I-907 and $1,225 fee along with your I-129 petition. If the USCIS fails to process your petition in the promised time, you will receive a refund of your premium processing fee and your petition will be processed normally.