On June 23, 2011, the U.S. Internal Revenue Service IRS released an advance copy of Announcement 2011-40, which increases the 2011 optional standard mileage rates used to calculate the deductible costs of operating an automobile for business, medical, moving expense, or charitable purposes.Related posts:U.S. : IRS Announces 2010 Optional Standard Mileage RatesFinland: 2011 Social Security, Personal Income Tax RatesUS and 2011 Adjustments