Postal Rates 2024 Chart. The interest rate on post office tax. Usps issued a chart of postage rates for a single letter (chart 1 below) along with its proposed rate increase for august 29, 2021, claiming “the u.s.
Effective september 16, 2024, usps will adjust rates for priority mail ® and ground advantage ™ packages shipped to certain zip codes. The interest rate on post office tax.