Revenue Procedure 2009-47 provides rules for employees who are reimbursed for lodging, meals, and incidental expenses, or meals and incidental expenses only, while traveling away from home, to substantiate the expenses by per diem allowance in lieu of actual expenses. The revenue procedure also provides an optional method for employees and self-employed individuals who are not reimbursed to use in computing the deductible costs they pay or incur for business meal and incidental expenses, or for incidental expenses only if they pay or incur no meal expenses, while traveling away from home. Use of a method described in this revenue procedure is not mandatory, and a taxpayer may use actual allowable expenses if the taxpayer maintains adequate records or other sufficient evidence for proper substantiation.
Revenue Procedure 2009-47 will be in IRB 2009-42, dated October 19, 2009.