2024 Postage Rates Per Ounce. On january 21 st, 2024, the usps ® will be adjusting rates for both market dominant and competitive products. Washington, dc — today, the united states postal service filed notice with the postal regulatory commission (prc) of mailing services price changes to take effect jan.

 — washington, dc — the u.s. The postal regulatory commission (prc) has approved the next usps postage rate increases, which will take effect on sunday, january 21, 2024.