It's year three of the United States Postal Service's (USPS) 10-Year Plan, and the USPS is raising postage rates for Market Dominated products for the second time this year on July 9th. The increase averages 5.4% across First Class, Marketing Mail, Periodicals, Package Services and Special Services. Flat rate mail, periodicals and packages will have a higher average rate due to the fact they are not meeting the cost associated with delivery. The USPS call these products "under water." The USPS has the authority to add an additional 2% increase above the 5.4% until these products are covering delivery costs. View the entire USPS 10-year plan here.