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Expiration Date

How is the expiration date for a per diem rate used in a flight crew member per diem calculation?

The expiration date is a date that applies to per diem rates, which is important when calculating a pilot or flight attendant's M&IE expense.  The expiration date is the last date that CONUS or OCONUS per diem rates are valid. It is imporant to review the effective date, the expiration date, the seasonal start date, and the seasonal end date for any layover locations used in a per diem calculation.

Often, the expiration date for per diem rates occurs on October 1st.  That date marks a time called the transition period, which is the last three months of a calendar year.

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