In order to claim IRS-allowed business travel expenses, you first need to know what constitutes a business-related expense. If you travel on business to a trade show or conference, you can deduct all incurred expenses, provided that 1) they benefit your business; 2) the convention, conference, or seminar lasts at least six hours a day; and 3) you attend a minimum of two-thirds of the program. To document your attendance and confirm payment it’s important that you keep copies of your registration forms and receipts.
You can also deduct a portion of your vacation costs as a business travel expense by engaging in some business while on vacation. Unfortunately, you can’t deduct the cost of travel to and from the location if the main purpose of the trip isn’t business, but you can deduct hotel and rental car costs for those days that you also visit a client, attend a conference, or take part in any activity meant to advance your career.
For more on business travel, be sure to read How to Make the Most of Business Travel.