"Companies writing workers' compensation insurance business in New York are required to participate in the New York Workers' Compensation Security Fund. If a company becomes insolvent, the security fund settles unpaid claims and assesses each insurance company for its fair share.
New York law requires all companies to surcharge policies to recover these assessments. If your policy is surcharged 'NY surcharge', an amount will be displayed on your premium notice."
N.Y. Work. Comp. Law § 108