When mailing a letter that weighs about one ounce, the U.S. Postal Service’s 44 cents is one of lowest First Class postage rates. Whether you are mailing a letter locally or sending a greeting card across country, it still only costs 44 cents now, but will increase to 45 cents in January. The graph below compares the U.S. Postal Service’s postage rate with other countries. As you can see, Norway charges the highest rate, which is nearly four times the cost U.S. rate.
Offering volume incentives is a common business practice in the U.S. and around the world. Although the U.S. Postal Service offers incentives to businesses that presort their mail, the agency does not offer incentives based strictly on the volume of packages shipped. One reason might be that offering volume incentives would lower the profit margin on each package shipped; yet, the potential volume increase of items shipped would make up for the smaller profit margins.
The Postal Accountability and Enhancement Act of 2006 (PAEA) ushered in a new regulatory structure for the U.S. Postal Service. One key element was a price cap on market dominant products. (Most of the Postal Service's products are market dominant.) This means that price increases for market dominant products are capped by the rate of inflation as measured by the Consumer Price Index (CPI).