Since an employer cannot tell if the FF miles you use are from your CC used at to pay for household items or from Airfare paid for by your employer.

Rule of thumb: if the miles are from personal use its Tax Exempt. If its from miles "GIVEN" to you by your employer they are taxable.

Now who is going to determine which type of miles you used on when you were reimbursed the taxable ones or the non taxable ones.

This is the reason the IRS threw up their hands ...... tooooooo complicated.

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AA member since 1981