Your friend and you can split the cost of your trip expenses in several ways including: Equal split, Proportional split, personal Split. Riverside, CA 92521 Tel: (951) 827-1012Business expenses, including air and auto transportation, hotel, and meals are allowed. Do not purchase office supplies or furniture. The entire trip consists of travel and business purposes. This policy provides the required guidelines that City officials and employees must follow when arranging travel, lodging and other approved expenses. Learn how to properly deduct business travel expenses (even those that feel like a vacation), including what qualifies as a business trip. Business travel expenses are tax deductible (for the most part), meaning you could lower the taxes you need to pay. As long as a trip is primarily for business, you could claim it as a business travel expense (within reason) and save some money on taxes. According to the tax code, you can deduct your travel expenses as long as your trip is an "ordinary and necessary" cost of doing business.