Postal Rates Per Ounce 2024. These rates went into effect on sunday, july 14th, 2024. Usps® is raising rates on july 14, 2024 for the sixth time in 3 years with some of the largest increases in history and at significantly higher pace than inflation.
Effective september 16th, usps is adjusting rates for priority mail® and ground advantage®. Washington, dc — today, the u.