The following discussion applies to travel in the United States. For this purpose, the United States includes the 50 states and the District of Columbia. The treatment of your travel expenses depends on how much of your trip was business related and on how much of your trip occurred within the United States. See "Part of Trip Outside the United States" below.
Trip Primarily for Business
You can deduct all of your travel expenses if your trip was entirely business related. If your trip was primarily for business and, while at your business destination, you extended your stay for a vacation, made a personal side trip, or had other personal activities, you can deduct your business-related travel expenses. These expenses include the travel costs of getting to and from your business destination and any business-related expenses at your business destination.
Example. You work in Atlanta and take a business trip to New Orleans. On your way home, you stop in Mobile to visit your parents. You spend $630 for the 9 days you are away from home for travel, meals, lodging, and other travel expenses. If you had not stopped in Mobile, you would have been gone only 6 days, and your total cost would have been $580. You can deduct $580 for your trip, including the cost of round-trip transportation to and from New Orleans. The deduction for your meals is subject to the 50% limit on meals.
Trip Primarily for Personal Reasons
If your trip was primarily for personal reasons, such as a vacation, the entire cost of the trip is a nondeductible personal expense. However, you can deduct any expenses you have while at your destination that are directly related to your business.
A trip to a resort or on a cruise ship may be a vacation even if the promoter advertises that it is primarily for business. The scheduling of incidental business activities during a trip, such as viewing videotapes or attending lectures dealing with general subjects, will not change what is really a vacation into a business trip.
Part of Trip Outside the United States
If part of your trip is outside the United States, use the rules described in Travel Outside the United States for that part of the trip. For the part of your trip that is inside the United States, use the rules for travel in the United States. Travel outside the United States does not include travel from one point in the United States to another point in the United States. The following discussion can help you determine whether your trip was entirely within the United States.
Public transportation. If you travel by public transportation, any place in the United States where that vehicle makes a scheduled stop is a point in the United States. Once the vehicle leaves the last scheduled stop in the United States on its way to a point outside the United States, you apply the rules under Travel Outside the United States.
Example. You fly from New York to Puerto Rico with a scheduled stop in Miami. You return to New York nonstop. The flight from New York to Miami is in the United States, so only the flight from Miami to Puerto Rico is outside the United States. Because there are no scheduled stops between Puerto Rico and New York, all of the return trip is outside the United States.
Private car. Travel by private car in the United States is travel between points in the United States, even though you are on your way to a destination outside the United States.
Example. You travel by car from Denver to Mexico City and return. Your travel from Denver to the border and from the border back to Denver is travel in the United States, and the rules in this section apply. The rules under Travel Outside the United States apply to your trip from the border to Mexico City and back to the border.
Information courtesy of the Internal Revenue Service.
