New Metered Postage Rates 2024. The postal regulatory commission (prc) has approved the next usps postage rate increases, which will take effect on sunday, july 14, 2024. Explore the usps postage rate shifts for postcards, flats, and letter sizes in 2024, and.

Explore the usps postage rate shifts for postcards, flats, and letter sizes in 2024, and. Effective september 16th, usps will adjust rates for priority mail and ground advantage.