Pennsylvania Income Tax Withholding Payment and Filing Requirements
Employers in Pennsylvania must conform with these state rules relating to filing income tax withholding returns.
Periodic Returns. Form PA 501 due semimonthly within 3 banking days of 15th and last day of month if employer withholds $1,000 or more per quarter; monthly by 15th day of following month (except return for last month of year is due January 31) if employer withholds at least $300 but less than $1,000 per quarter.
Quarterly on Form PA 501/W-3 by last day of month following end of quarter if employer withholds less than $300 per quarter.
Semi-weekly payments may be required for some employers.
Annual Reconciliation Returns. None.