Pennsylvania law requires withholding at a rate of 3.07 percent on non-wage Pennsylvania source income payments made to nonresidents. Discover essential steps for safely paying international contractors.Our guide simplifies compliance, currency, payment methods, contracts, and more. Pennsylvania can only tax a nonresident individual's compensation if it was earned within Pennsylvania. Pennsylvania taxes all the compensation of a resident individual regardless of where it is earned. Independent contractors and outside directors who reside out of state are subject to withholding. Withhold Pennsylvania state tax on payments to individuals who are nonPennsylvania residents, and who are performing services in Pennsylvania. Pennsylvania businesses are now required to withhold and report on compensatory payments to nonemployee Directors who do not reside in Pennsylvania. Payments of Pennsylvania source nonemployee compensation or business income to a nonresident individual or disregarded entity that has a non. When to withhold independent contractor taxes?