Question

What are fixed costs?

Answer 1

Fixed costs are business expenses that do not change with the level of production or sales volume in the short run (within the relevant range). They are incurred even if output is zero.

Key points
- Fixed in total: the total dollar amount stays the same regardless of output (e.g., monthly rent).
- Fixed per unit: fixed cost per unit falls as production increases (total fixed cost ÷ units produced).
- Relevant range: the constancy holds only for a normal span of activity; beyond that range the cost may change (e.g., need a larger factory).
- Time horizon: in the long run most costs can become variable.

Common examples
- Rent or lease payments for buildings or equipment
- Salaries of permanent staff and executives
- Insurance premiums
- Property taxes
- Straight-line depreciation
- Loan interest (if contractual)

Contrasts and related concepts
- Variable costs change with output (raw materials, piece-rate wages, sales commissions).
- Mixed (semi-variable) costs have both fixed and variable components (e.g., a phone bill with a flat fee plus usage charges).

Why it matters
- Break-even analysis: break-even units = fixed costs ÷ contribution margin per unit (selling price − variable cost per unit).
- Operating leverage: businesses with high fixed costs have higher operating leverage — small sales changes cause larger profit swings.
- Pricing, capacity planning and budgeting decisions depend on knowing fixed cost levels.

Simple example
If monthly rent is $5,000 and you produce 1,000 units, fixed cost per unit = $5.00. If you produce 2,000 units, fixed cost per unit = $2.50, but total rent stays $5,000.

If you want, I can show a break-even calculation or help classify costs from your business.