The ADP customer support number is generally available Monday to
Friday from 7:30 am to 10:00 pm ET to help you. However, the availability of ADP customer service hours may differ depending on the location and the nature of the assistance needed.
On urgent client service matters like payroll processing or other critical issues, the ADP support is accessible to offer assistance 24 hours a day, 7 days a week. Similarly, non-urgent matters, complaints, and queries are answered within 24 to 48 hours of receiving them.