Tour costing is the comprehensive accounting process used by travel operators to determine the total expenditure required to design, market, and execute a package tour. In 2026, this involves aggregating direct costs (flights, hotel room rates, coach rentals, entrance fees, and meals) and indirect costs (administrative overhead, marketing, and research for new itineraries). A critical part of tour costing in the modern era is the break-even analysis, which calculates the minimum number of passengers needed to cover fixed costs. Operators also factor in a "buffer" for currency fluctuations—vital for 2026 international travel—and a profit margin. The final "costing" is what determines the retail price seen by the consumer. In 2026, many operators use automated "dynamic costing" software that adjusts the price of the package in real-time based on the fluctuating costs of the underlying components, such as aviation fuel or seasonal hotel surcharges.