BtoB: American Business Media is projecting that commercial mailers and marketers could face a 3.5% increase in postal rates next year. The U.S. Postal Service is allowed by law to boost postal rates based on cost of living increases as measured by the Consumer Price Index, currently 2.5% to 3.0%. It also can base rates on any unused CPI amounts it has "banked," which currently is about 0.5% for various postal products. Read more!