Usps Rates 2024 Increase Letter. Starting on july 14th, 2024, the us postal service will increase “forever” stamp prices from 68 cents to 73 cents for letters weighing one ounce or less. Postage stamp will increase from 66 cents to 68 cents, according to the u.s.

Effective january 21, 2024, the cost of mailing letters, packages, and other usps services will climb slightly across the board. Effective september 16th, usps is adjusting rates for priority mail® and ground advantage®.