The IRS generally does not audit frequent flyer miles or credit card points when they are earned through personal travel or personal spending, as they are considered a "non-taxable rebate" or a discount on a purchase. In 2026, the standing guidance from the IRS is that most miles earned from airline flights or credit card "sign-up bonuses" are not considered taxable income. However, there are two specific scenarios where the IRS might take an interest. First, if a business owner earns millions of miles through business expenditures and then converts those miles into cash or uses them for extensive personal travel, the IRS may view this as an "under-the-table" fringe benefit or unreported business income. Second, if you receive miles as a direct prize from a sweepstakes or as a referral bonus without making a purchase (e.g., a "bank bonus" that pays in miles for opening an account), the value of those miles must be reported as "Other Income" on a 1099-MISC form if the value exceeds $600. While a full "mileage audit" is extremely rare for the average individual, the IRS is increasingly using data analytics to look for large discrepancies in business-related travel and reward points to ensure that high-wealth individuals are not avoiding taxes by shifting income into untaxed loyalty rewards.