If you travel without doing any business, the IRS won't offer any deductions on your vacation. You cannot write off travel or lodging fees just for visiting friends and family. Even if your trip was primarily a vacation with a little work tacked on, only the costs incurred for business on business days are deductible.

To "write off" a family vacation as a business expense in 2026, the trip's primary purpose must be business-related, and you must be a business owner or self-employed. Under IRS rules, you can only deduct the portions of the trip that are "ordinary and necessary" for your trade. For example, if you fly to Orlando for a 3-day industry conference and stay 3 extra days for Disney with your family, you can deduct 100% of your own airfare (since the trip's primary reason was business) and the 3 nights of lodging/meals during the conference. However, you cannot deduct any expenses for your spouse or children unless they are bona fide employees of your business whose presence is required for the business activities. You must keep meticulous records, including a contemporaneous log of your business meetings, client names, and specific agendas. Personal days are entirely non-deductible. While it is a common strategy to "sandwich" a vacation around a business event, it is vital to consult with a tax professional to ensure your documentation can withstand an audit, as the IRS closely scrutinizes "mixed-purpose" travel.