 As mentioned above, an employer was required to pay the additional H-1B fees only in the case that the employer had 51 or more employees and H-1B and L-1 employees together comprised over 50% of the workforce.The fee would apply only to petitions on postmarked on or after August 14, 2010, and until September 30, 2014.Public Law 111-347 extended these fees till September 30, 2015.