IRS Releases Guidance on Per Diem Allowances for Business Expenses Incurred While Traveling

​The Internal Revenue Service (IRS) announced the special per diem rates effective October 1, 2022. Notice 2022-44 provides 2022-2023 special per diem rates for taxpayers to substantiate the ordinary and necessary business expenses incurred while traveling away from home. The rates are the special transportation industry rate, the rate for the incidental expenses only deduction, and the rates and list of high-cost localities for purposes of the high-low substantiation method. ​