what do us postage stamps cost
Summary of the 2017 Postage Rate Increase: First Class Mail Letters (1 oz.) rates will increase from $0.47 to $0.49 when purchased at the Post Office. Each additional ounce will cost $0.21. The discounted âMetered Mailâ category for First Class Mail Letters (1 oz.), which includes online postage providers and postage meters, will decrease from $0.465 to $0.46. Each additional ounce will cost $0.21. First Class Mail Flats (1 oz.) will increase from $0.94 to $0.98. Each additional ounce will cost $0.21.