Under current 2026 tax regulations, travel expenses are deductible only if they are ordinary and necessary for your business, profession, or job. For self-employed individuals and business owners, 100% of travel costs like airfare, lodging, and local transit are deductible when the primary purpose of the trip is business. However, "unreimbursed employee expenses" for W-2 workers are generally not deductible on federal returns due to the Tax Cuts and Jobs Act (TCJA) which remains in effect. A major nuance is the 50% limit on business meals, which typically applies unless a specific temporary exception is active. Personal side-trips or "lavish/extravagant" expenses are strictly excluded. To claim these deductions, you must maintain meticulous records, including receipts and a log of the business purpose for each expense. For 2026, the standard mileage rate for business use of a vehicle has increased to 72.5 cents per mile, reflecting the higher costs of fuel and vehicle maintenance.