Glossary term
Fixed Cost
A fixed cost is a business cost that does not change directly with production or sales volume over a relevant range.
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What Is a Fixed Cost?
A fixed cost is a business cost that does not change directly with the number of units produced or sold over a relevant range of activity. Rent, salaried administrative labor, insurance, software subscriptions, and certain equipment costs can be fixed costs for many businesses.
Fixed does not mean permanent. It means the cost stays relatively stable as volume changes within the period and scale being analyzed. Over a longer horizon, many fixed costs can change.
Key Takeaways
- Fixed costs do not vary directly with production or sales volume in the short run.
- Examples can include rent, insurance, salaries, leases, and subscriptions.
- Fixed costs affect break-even analysis and operating leverage.
- A cost can be fixed in one context and variable in another.
- High fixed costs can magnify both profits and losses as sales change.
How Fixed Costs Work
A business must usually pay fixed costs even when sales are slow. A store may owe rent whether it sells 10 items or 10,000 items. A manufacturer may have lease payments and salaried supervisors even when production is below capacity.
Fixed costs are central to break-even analysis. The more fixed cost a business has, the more contribution margin it needs before it covers overhead and starts producing profit.
Fixed costs also create operating leverage. Once sales exceed break-even, additional revenue can produce strong profit growth because fixed costs are already covered. But when sales fall, the same fixed cost base can pressure margins and cash flow.
Fixed Cost Compared With Other Cost Types
Cost type | How it behaves | Example |
|---|---|---|
Fixed cost | Stable over a relevant range | Monthly rent |
Variable cost | Changes with volume | Direct materials |
Mixed cost | Has fixed and variable parts | Utility bill with base charge and usage charge |
Step cost | Jumps when capacity changes | Adding another supervisor |
Limits and Misunderstandings
Fixed cost analysis depends on the relevant range. Rent may be fixed for one store, but total rent changes if the business opens more locations. Salaries may be fixed for a month, but not necessarily for years.
Fixed costs are also not automatically bad. They can support scale, quality, and capacity. The risk is committing to a cost base that the business cannot support through changing demand.
Managers should separate fixed and variable costs carefully when pricing products, setting budgets, planning growth, or evaluating whether a business can withstand a sales decline.
The Bottom Line
A fixed cost is a cost that stays relatively stable as volume changes within a relevant range. Understanding fixed costs helps businesses price, budget, analyze break-even points, and manage operating leverage.