Are Us Postage Stamps Going Up In 2025. Postal service filed notice with the postal regulatory commission of mailing services price changes to take effect july 14, 2025.  — on sunday, the cost of a stamp is going up for the second time this year, jumping 5 cents for first class postage to 73 cents.

 — us postage rates effective july 14 2025.  — usps stamp increase could start july 14.