The Internal Revenue Service (IRS) has cut by one-half cent the 2014 optional standard mileage rates used to calculate the deductible costs of operating an automobile for business, charitable, medical or moving purposes.

Starting Jan. 1, the new rates will be:

  • 56 cents per mile for business miles driven
  • 23.5 cents per mile driven for medical or moving purposes
  • 14 cents per mile driven in service of charitable organizations
The standard mileage rate for business is based on an annual study of the fixed and variable costs of operating an automobile, the IRS said in its Dec. 6 announcement. The rate for medical and moving purposes is based on the variable costs.