Yes, from an accounting and personal finance perspective, service fees are considered an expense. Specifically, they are categorized as "operating expenses" for a business or "discretionary/living expenses" for an individual. Whether it is a "convenience fee" for booking a flight, a "resort fee" at a hotel, or a "platform fee" on a delivery app, these costs represent a high-value outflow of cash in exchange for a service provided. In 2026, many businesses list these as separate line items to keep the base price looking lower—a practice often called "drip pricing." For business owners, service fees (like merchant processing fees) are tax-deductible as a cost of doing business. For travelers, it is a peer-to-peer essential to track these "hidden" expenses, as they can easily add 10% to 20% to the total cost of a trip. While the base ticket might be the "cost," the service fee is the "expense" of facilitating that transaction, and both must be factored into your high-value budget to avoid financial surprises at the end of your journey.