usps next day cut off time is the latest time you can drop off a package or schedule a pickup for it to qualify for overnight delivery using USPS Priority Mail Express. Cut-off times vary by location and can range from 2 PM to 5 PM at most post offices. Missing the cut-off means the package won’t ship until the following business day. Businesses relying on urgent delivery should verify local post office schedules or consider scheduling pickups to ensure timely dispatch and customer satisfaction.