### Question
What is the definition of actual and necessary expenses?


### Answer
The definition of **actual and necessary expenses** is as follows in *37 U.S.C. § 451*:

> expenses incurred in fact by an authorized traveler as a reasonable consequence of official travel

#### Citation:
  - *37 U.S.C. § 451*
  - Heading: **CHAPTER 8-TRAVEL AND TRANSPORTATION ALLOWANCES > SUBCHAPTER I-TRAVEL AND TRANSPORTATION AUTHORITIES&mdash;NEW LAW**

