Unreimbursed expenses that are incurred when voluteering for a qualified charitable organization AND are incurred ONLY because of the voluteer services are deductible if you are able to itemize deductions. Some expenses that may be included are 1) travel, lodging & meals, 2) actual fuel costs or 14 cents per mile, 3) uniforms and/or cleaning, 4) parking & tolls. Reliable written records of out-of-pocket expenses must be maintained. For any expense of $250 or more, you must obtain a statement from the charity describing the volunteer services and whether the charity provided goods or services to the volunteer.
