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Effective invoice auditing ensures agencies only pay for services received and protects taxpayer funds. The audit is designed to ensure the shipper agency only pays for the services it received at the agreed-upon price.
Agencies must audit all transportation invoices per 41 CFR 102-118.
To comply, agencies should -
Audits matter because they allow the agency to -
There are two types of transportation invoice audit - a prepayment audit and a post-payment audit. You may also conduct both for invoices.
For more information, see the Invoice Payment & Audit Reference Guide and the Travel Invoice Audit Handbook. These handbooks provide detailed guidance on -
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Rates for Alaska, Hawaii, and U.S. territories and possessions are set by the Department of Defense.
Rates for foreign countries are set by the Department of State.
Rates are available between 10/1/2023 and 09/30/2026.
The End Date of your trip can not occur before the Start Date.
Traveler reimbursement is based on the location of the work activities and not the accommodations, unless lodging is not available at the work activity, then the agency may authorize the rate where lodging is obtained.
Unless otherwise specified, the per diem locality is defined as "all locations within, or entirely surrounded by, the corporate limits of the key city, including independent entities located within those boundaries."
Per diem localities with county definitions shall include"all locations within, or entirely surrounded by, the corporate limits of the key city as well as the boundaries of the listed counties, including independent entities located within the boundaries of the key city and the listed counties (unless otherwise listed separately)."
When a military installation or Government - related facility(whether or not specifically named) is located partially within more than one city or county boundary, the applicable per diem rate for the entire installation or facility is the higher of the rates which apply to the cities and / or counties, even though part(s) of such activities may be located outside the defined per diem locality.
U.S. General Services Administration