Stamps Going Up a Penny It will cost 46 cents to mail a letter By Newser Editors and Wire Services Posted Nov 16, 2012 4:21 PM CST 23 comments Comments In this 2009 file photo, a US Postal Service employee displays Forever stamps. (AP Photo/Kathy Willens, File) (Newser) – The cost of mailing a first-class letter will go up by a penny in January. The Postal Regulatory Commission today approved the proposed rate increase, which raises the price of a first-class domestic stamp to 46 cents. The price of a postcard will increase from 32 cents to 33 cents, while a new global "forever" stamp will allow customers to mail letters anywhere in the world for one set price of $1.10. Currently, the prices for international letters vary. The prices go into effect Jan. 27. The Postal Service just posted a record annual loss of $15.9 billion.