Travel Reimbursement Information

Per Diem Rates


Note: Travelers are highly encouraged to request reimbursement for the actual cost of M&IE up to the established rates.


Lodging and Meals & Incidental Expenses (M&IE) Established Rates for Travel within:



Deductions When Meals are Provided


When meals are included in registration fees or are furnished as part of an official Laboratory business function, the established M&IE rate is reduced according to the chart below. You can also view this breakdown on the GSA website.




Domestic (CONUS)

OCONUS & Foreign

M&IE Total:







Continental Breakfast/Breakfast:
































First & Last Day of Travel:










Lodging + M&IE = Per Diem


Per diem is the allowance for lodging (excluding taxes for domestic travel only) and meals & incidental* expenses (M&IE). The General Services Administration (GSA) establishes per diem rates for destinations within the Continental United States (CONUS). Per diem rates for Alaska, Hawaii and United States possessions (referred to as OCONUS) are established by the Department of Defense. The rates for all foreign travel are established by the U.S. Department of State.


*Incidental Expenses as defined by the Federal Travel Regulations include: fees and tips given to porters, baggage carriers, bellhops, hotel maids, stewards or stewardesses and others on ships, and hotel servants in foreign countries. On foreign travel, laundry and dry cleaning are considered incidental expenses.