Postage Rates 2024 Extra Ounce. The usps mailing services price changes will take effect july 14, 2024. The standard regular mail rate will be increased by $0.01 to.

Importantly, there is no change to the basic postage rate (domestic stamps). The baseline postage rate to mail a flat/large envelope has increased from $1.35 to $1.39 in postage, but the price for each additional ounce also stayed the same at 24 cents per.