For charitable work:
2018: remains at 14 cents per mile as fixed by law [Code Section 170(i)]
Hurricane Katrina related:
For deduction purposes For reimbursement purposes
2006 32 cents 44.5 cents
9/1 to 12/31/05 34 cents 48.5 cents
8/25 to 8/31/05 29 cents 40.5 cents
12 cents per mile for years before 1999