2024 Postage Rates Increase. Effective september 16, 2024, usps will adjust rates for priority mail ® and ground advantage ™ packages shipped to certain zip codes. According to usps, informed delivery increases reach by 13%, gets 39% more attention with 37% more response, and has 20% more conversions.

This means the cost to ship. The changes will raise mailing services product prices approximately 7.8 percent.