The state Department of Taxation has set a 55 cents a mile rate for computing business automobile deductions for 2009.

The deduction rate for medical or moving is set at 24 cents a mile, while the charitable rate is 14 cents.

The rates conform with the federal optional standard mileage rates. The business mileage rate is lower than the 50.5 cents a mile for the first half of 2008 and 58.5 cents a mile for the second half.