The U.S. Department of Transportation recently released Standard Industry Fare Level (SIFL) rates for the six-month period from Jan. 1 to Jun. 30, 2018. These rates are necessary when applying the IRS aircraft valuation formula to compute values of non-business transportation aboard employer-provided aircraft. NBAA's personal use calculator has also been updated with the latest rates.
Read more here:: SIFL Rates for the First Half of Calendar Year 2018