Fixed costs

Fixed costs are expenditures that must be made before production starts and that do not change regardless of the level of production.

Definition

According to Principles of Economics by Timothy Taylor (3rd edition),

Fixed costs. Expenditures that must be made before production starts and that do not change regardless of the level of production.

According to Product Manager's Handbook by Gorchels (2nd edition),

Fixed costs. Costs that don’t vary with production or sales level. Rent, heat, and executive salaries are examples of fixed costs.