The cost of mailing a letter is a month away from increasing by three cents. That means the rate will be 49 cents for a first-class stamp.
Beginning in January, all new postage stamps good for one ounce of first-class mail will be marked as "forever." The US Postal Service is doing away with issuing first-class stamps with denominations.
It is going to cost you more to use snail mail. Monday, the cost of a stamp goes up from 42 to 44 cents. Forever Stamps will still work, even if you bought them at the lower rate.