What Is a Fixed Cost? Definition and Examples

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A fixed cost is a business expense whose total amount stays the same over a given period regardless of how much the business produces or sells, as long as activity stays within a normal operating range (the “relevant range”). Rent on a factory, salaries for managers, insurance premiums, property taxes, loan interest and straight-line depreciation are standard examples. The business owes them whether it makes 100 units or 10,000 units that month.

Two points are easy to miss. “Fixed” describes the total cost, not the cost per unit: a $10,000 monthly lease is fixed in total, but each unit’s share falls as output rises. And a cost is fixed only for a period and a range; over a longer horizon, or past a capacity limit, almost any fixed cost can change.

What Is a Fixed Cost?

A fixed cost is an expense set by a contract, schedule or commitment rather than by the level of activity. Signing a lease, hiring salaried staff, taking out a loan or buying equipment creates costs that recur on a timetable and stay the same until the contract or schedule changes. Fixed costs are also called fixed expenses or, in many contexts, overhead. A new restaurant, for instance, pays rent, insurance and its manager’s salary before it serves a single customer, and keeps paying them on a slow Tuesday as well as a busy Saturday.

The opposite category is variable cost: expenses that rise and fall with output, such as raw materials, packaging, shipping, sales commissions and hourly production labor. Total cost is the sum of the two:

Total cost = Total fixed costs + (Variable cost per unit × Number of units)

In economics, this is often written as a cost function, C(x) = F + v·x, where x is output, v is variable cost per unit and F is fixed cost. Setting output to zero gives C(0) = F: the fixed cost is the cost the firm bears even when it produces nothing.

How a Fixed Cost Works

Total Versus Per-Unit Behavior

The defining behavior of a fixed cost shows up when you compare totals with per-unit figures:

• Total fixed cost is flat. Draw it on a chart with output on the horizontal axis and it is a horizontal line.
• Fixed cost per unit declines as output rises, because the same total is divided among more units.
• Total variable cost rises in a straight line with output.
• Variable cost per unit stays roughly constant.

Consider a hypothetical workshop with $20,000 a month in fixed costs:

The workshop pays the same $20,000 at every level shown; only the share each product absorbs changes. Spreading fixed costs over more units is one of the main sources of economies of scale: a business with large fixed costs and high volume can offer lower prices or earn wider margins than a smaller rival with the same cost base.

The Relevant Range

A fixed cost stays fixed only within a band of activity that the current setup can handle. The workshop’s $20,000 may cover rent on one building, one supervisor and one set of machines. If demand rises to a level that requires a second building or a second shift supervisor, fixed costs jump to a new, higher level and then stay flat again.

Costs that behave this way are called step costs or step-fixed costs. A software company’s server capacity, a hospital’s nursing staff on a ward and a warehouse’s floor space can all behave like steps: flat across a range, then a sudden increase when the range is exceeded. Analysts who call a cost “fixed” are implicitly assuming the business stays within its current step.

The Time Horizon

Fixed costs are also tied to a time frame. In the short run, a company cannot easily exit a five-year lease or sell a factory, so those costs are locked in. In the long run, every cost becomes variable in the economic sense: leases expire, equipment wears out and can be replaced or not, and staffing can be restructured.

This leads to a principle from economics. In the short run, a firm may keep operating even at a loss, provided its revenue covers its variable costs, because the fixed costs must be paid whether it operates or not, and any revenue above variable cost helps pay them. Over the long run, selling prices must cover both fixed and variable costs, or the business will eventually close or exit the market.

Fixed Does Not Mean Permanent

A fixed cost can change; it just does not change because of volume. Rent rises when a lease is renewed or when an escalation clause kicks in. Insurance premiums are repriced at renewal. Salaries change with raises, new hires and layoffs. Interest expense changes when a loan is refinanced or paid down, and on variable-rate debt it changes with benchmark rates even though it is unrelated to production. The test is not whether a cost ever moves, but whether it moves with the level of output or sales.

Examples of Fixed Costs

General Business Examples

Most businesses carry some version of the following fixed costs:

• Rent and lease payments for offices, stores, warehouses and equipment under fixed-payment leases.
• Salaries for management, administrative and other staff paid a set amount.
• Insurance premiums, such as property, liability and business interruption coverage.
• Property taxes on owned real estate.
• Interest expense on loans and bonds.
• Depreciation and amortization calculated on a time-based schedule.
• Software subscriptions and licenses billed at a flat rate.
• Some utilities, such as a fixed internet or phone plan, or the base charge on an electricity bill.
• Professional fees under fixed retainers.
• Loan principal repayments, a fixed cash outflow even though they are not an expense on the income statement.

Examples of Fixed Costs in Manufacturing

A factory’s fixed costs are tied to its capacity rather than to each unit it makes. Typical examples:

• Rent or depreciation on the factory building
• Depreciation on production machinery (on a straight-line basis)
• Property taxes and insurance on the plant and equipment
• Salaries of plant managers, supervisors, quality-control staff and maintenance crews
• Security services and facility cleaning contracts
• Scheduled maintenance contracts for equipment
• Base charges for utilities and the portion of energy used for lighting, heating and cooling regardless of output

By contrast, raw materials, components, packaging, freight on outbound shipments and power consumed directly by running machines are typically variable. Hourly production wages are often treated as variable, though that depends on how labor is scheduled (see below).

Examples in Service Businesses

A service business has few materials costs, so more of its spending sits in fixed categories: office rent, salaried professionals, software, insurance and marketing retainers. A consulting firm pays its salaried consultants whether they bill clients or not, which is why utilization (the share of paid hours that are billed) drives its profitability. Variable service costs include contractor fees, project travel and payment processing charges.

Common Classification Questions

Several everyday expenses do not fit neatly into one category. The answer depends on how the cost is contracted and how it is calculated.

Is Rent a Fixed Cost?

Usually, yes. Rent under a standard lease is a fixed amount per period, and it does not change with how much a store sells or a factory produces. The exception is percentage rent, common in retail leases, where the tenant pays a base rent plus a percentage of sales above a threshold. The base is fixed; the percentage component is variable, which makes the total a mixed cost.

Fixed versus variable describes how a cost behaves as volume changes; operating versus non-operating describes where it appears on the income statement. Shop rent is both a fixed cost and an operating expense. Equipment bought for a store or office is a capital outlay recovered through depreciation, and that depreciation is a fixed operating expense.

Is Payroll a Fixed Cost?

It depends on the type of pay. Salaries are generally fixed, because a salaried employee is paid the same amount regardless of output. Hourly wages for production workers whose hours rise and fall with demand are usually treated as variable. Overtime is variable. Sales commissions and piece-rate pay are variable by design.

In practice, much hourly labor behaves like a step cost. A plant may need a full crew for a shift whether it runs at 60% or 90% of the line’s capacity, so labor stays flat until the plant adds or drops a shift. Employee benefits that are set per employee, such as health insurance premiums, behave like fixed costs for a given headcount.

Is Depreciation a Fixed or Variable Cost?

Depreciation calculated on a time basis, such as the straight-line method, is a fixed cost: the same amount is recorded each period regardless of how much the asset is used. Under the units-of-production method, depreciation is calculated from actual usage (miles driven, machine hours, units produced), which makes it a variable cost. The method the company chooses determines the behavior.

Are Utilities Fixed or Variable?

Utilities are often semi-variable. An electricity bill typically has a fixed monthly service charge plus usage charges. A factory’s power use has a baseline (lighting, climate control, office equipment) and a component that rises with machine hours. Flat-rate plans such as a business internet contract are fixed.

Are Raw Materials a Fixed Cost?

No. Raw materials are a variable, direct cost of production, because the amount consumed rises with each unit produced. They belong to working capital and operating costs, not to fixed capital investment, which refers to long-lived assets such as plant, machinery and buildings.

Fixed Costs on the Financial Statements

Income Statement

Fixed costs do not have their own line on a standard income statement. Instead, they are spread across several lines based on their function:

• Cost of goods sold (COGS) can include fixed manufacturing overhead, such as factory rent, plant supervisors’ salaries and depreciation on production equipment.
• Selling, general and administrative expenses (SG&A) include fixed costs such as office rent, executive salaries and corporate insurance.
• Depreciation and amortization may appear as a separate line or be folded into COGS and SG&A.
• Interest expense appears below operating income.

Because companies have some discretion in how they group costs, the income statement alone usually does not tell an outside reader how much of a company’s cost base is fixed. Analysts often have to estimate it.

Balance Sheet

Fixed costs connect to the balance sheet through the assets and obligations that create them. Equipment and buildings appear as property, plant and equipment, reduced over time by accumulated depreciation. Loans appear as liabilities. Under current lease accounting standards (ASC 842 in the United States and IFRS 16 internationally), most leases longer than 12 months are recorded on the balance sheet as a right-of-use asset and a lease liability. Unpaid fixed obligations, such as accrued salaries or interest, appear as short-term liabilities.

Cash Flow Statement

Cash paid for fixed costs flows through the cash flow statement. Rent, salaries and insurance are operating cash outflows. Purchases of equipment are investing outflows. Principal repayments on debt are financing outflows. Depreciation is added back in the operating section because it is a non-cash expense: the cash went out when the asset was bought, not when depreciation is recorded.

How Fixed Costs Are Treated in Accounting

Fixed costs are expensed in the period they relate to. Only the cost of long-lived assets is spread over their useful lives through depreciation; rent, salaries and insurance are expensed as incurred.

Product Costs Versus Period Costs

Accountants separate costs into two groups:

• Product costs attach to inventory. In manufacturing, these include direct materials, direct labor and manufacturing overhead, both variable and fixed. They become an expense (COGS) only when the goods are sold.
• Period costs are expensed in the period incurred, regardless of production. Most selling and administrative fixed costs, such as office rent and executive salaries, are period costs.

Absorption Costing Versus Variable Costing

For external financial reporting under U.S. GAAP and IFRS, manufacturers use absorption costing: fixed manufacturing overhead is allocated to each unit produced and sits in inventory until the units are sold. One consequence is that when a company produces more than it sells, part of that period’s fixed factory cost stays on the balance sheet in inventory, and reported profit is higher than it would be if all fixed costs were expensed immediately.

For internal decision-making, many companies also use variable costing (also called direct or marginal costing), which treats all fixed manufacturing overhead as a period expense. Under variable costing, profit depends on sales rather than on how much was produced, which makes it easier to see the effect of fixed costs on decisions such as pricing and capacity.

Cost Allocation

Allocating fixed overhead to products requires a basis, such as machine hours, labor hours or floor space. Different bases can produce very different per-unit costs for the same product. Activity-based costing tries to improve accuracy by tracing overhead to the activities that drive it, but any allocation of a shared fixed cost involves judgment.

Fixed Cost vs. Variable Cost

The core difference is what drives the cost. Fixed costs are driven by time and commitments; variable costs are driven by output.

COGS for many businesses is mostly variable cost, though it can include fixed manufacturing overhead. The fixed-variable split varies widely by industry, so cost structures are best compared within an industry. An airline, a semiconductor maker or a telecom operator carries enormous fixed costs in aircraft, fabrication plants or networks; a retailer reselling finished goods carries more variable cost in the merchandise itself.

Semi-Variable (Mixed) Costs

A semi-variable cost, also called a mixed cost, has a fixed component and a variable component. Examples:

• A salesperson paid a base salary plus commission
• Equipment maintenance with a fixed service contract plus parts billed as used
• A delivery vehicle lease with a flat monthly payment plus charges for miles above an allowance

Some mixed costs, like the mileage example, are fixed up to a threshold and variable above it. For breakeven or budgeting calculations, the two parts must be separated.

Separating a Mixed Cost: The High-Low Method

The high-low method is a simple way to estimate the fixed and variable parts of a mixed cost from two observations. Hypothetical example for a factory’s electricity:

• Highest-activity month: 5,000 machine hours, $2,600 electricity cost
• Lowest-activity month: 2,000 machine hours, $1,400 electricity cost

Variable rate = (Cost at high − Cost at low) ÷ (High activity − Low activity) = ($2,600 − $1,400) ÷ (5,000 − 2,000) = $0.40 per machine hour

Fixed component = Total cost − (Variable rate × Activity) = $1,400 − ($0.40 × 2,000) = $600 per month

The cost can then be modeled as $600 + $0.40 per machine hour. The method relies on only two data points, so an unusual month can distort it. Regression analysis on many months gives a more reliable estimate.

Other Distinctions Readers Confuse With Fixed Cost

Direct vs. Common Fixed Costs

When a company reports by segment (product line, store, division or region), fixed costs split into two types:

• Direct (traceable) fixed costs belong to a specific segment and would disappear if that segment were eliminated. A store manager’s salary and the store’s lease are direct fixed costs of that store.
• Common fixed costs support several segments and would remain even if one segment were dropped. Corporate headquarters rent, the CEO’s salary and company-wide IT systems are common fixed costs.

The difference matters when deciding whether to close a segment. Suppose a hypothetical retailer’s store produces $50,000 in contribution margin, carries $35,000 in direct fixed costs and is allocated $25,000 of headquarters costs. On a fully allocated basis, the store shows a $10,000 loss. But its segment margin (contribution margin minus direct fixed costs) is a positive $15,000. If the store closes, the $25,000 of common costs does not go away; it is reallocated to other stores, and the company as a whole is $15,000 worse off. A common fixed cost is still a fixed cost; the label just tells you who can avoid it.

Committed vs. Discretionary Fixed Costs

• Committed fixed costs come from long-term decisions that cannot be reversed quickly: depreciation on buildings, multi-year leases, property taxes and debt interest.
• Discretionary fixed costs are set by management each budget period and can be cut relatively quickly: advertising campaigns, research programs, training and employee events.

When a company needs to reduce costs fast, discretionary fixed costs are where it usually has room to act. Cutting them can save money in the short run while weakening the business later.

Fixed Costs vs. Sunk Costs

A sunk cost is money already spent that cannot be recovered, such as a nonrefundable deposit, past research spending or the purchase price of specialized equipment with no resale value. Sunk costs are irrelevant to future decisions because no choice can change them.

Fixed costs and sunk costs overlap but are not the same:

• Many fixed costs are future commitments that can still be avoided or reduced. Next year’s rent is fixed but not sunk if the lease can be ended.
• A sunk cost is about the past and about recoverability. A one-time outlay already made is sunk whether or not it is classified as fixed.

So not all fixed costs are sunk. When evaluating a new project, analysts look only at future cash flows, including any new fixed costs the project creates.

Fixed Costs vs. Overhead and Indirect Costs

The terms are often used interchangeably but are not identical. Overhead refers to costs not directly tied to making a specific product; most overhead is fixed, but some, such as factory supplies, is variable. Indirect cost is a traceability concept (can the cost be assigned to a specific product?), while fixed cost is a behavior concept (does it change with volume?). A cost can be direct and fixed: rent on a factory that makes only one product is fixed and traceable to that product.

Why Fixed Costs Matter: Breakeven Analysis

Fixed costs determine how much a business must sell before it earns any profit. Breakeven analysis finds the level of sales at which total revenue equals total costs.

Fixed cost formula for breakeven:

Breakeven point (units) = Fixed costs ÷ (Sales price per unit − Variable cost per unit)

The denominator is the contribution margin per unit: the amount each sale contributes toward covering fixed costs and then producing profit.

Worked Example

A hypothetical bakery has the following monthly fixed costs:

• Rent: $4,000
• Salaries: $6,000
• Equipment depreciation: $1,000
• Insurance: $500
• Interest on an equipment loan: $500
• Total fixed costs: $12,000

It sells loaves at $4.00, and the variable cost per loaf (flour, other ingredients, packaging, card processing) is $1.50. Contribution margin per loaf is $2.50.

Breakeven = $12,000 ÷ $2.50 = 4,800 loaves per month

Below 4,800 loaves, the bakery loses money. Above it, every additional loaf adds $2.50 to profit. At 8,000 loaves, revenue is $32,000, variable costs are $12,000 and fixed costs are $12,000, so profit is $8,000.

Breakeven can also be stated in dollars:

Breakeven sales ($) = Fixed costs ÷ Contribution margin ratio

The contribution margin ratio is $2.50 ÷ $4.00 = 62.5%, so breakeven sales = $12,000 ÷ 0.625 = $19,200, which equals 4,800 loaves at $4.00.

What Breakeven Shows About Fixed Costs

Each extra dollar of fixed cost raises the breakeven point by the dollar divided by the contribution margin. If the bakery signs a new lease that adds $1,000 a month, breakeven rises by 400 loaves ($1,000 ÷ $2.50). Breakeven analysis also informs pricing: raising the price to $4.50 lifts the contribution margin to $3.00 and lowers breakeven to 4,000 loaves, assuming demand holds.

The calculation assumes a single product (or a stable sales mix), a constant price, a constant variable cost per unit and fixed costs that stay within one relevant range.

Why Fixed Costs Matter: Operating Leverage

Operating leverage describes how much operating income changes in response to a change in sales. It comes directly from fixed costs: when a large share of costs is fixed, each additional sale adds mostly profit, and each lost sale removes mostly profit.

Degree of operating leverage (DOL) = Q × (P − V) ÷ [Q × (P − V) − F]

Where Q is the number of units, P is price per unit, V is variable cost per unit and F is fixed costs. The numerator is total contribution margin; the denominator is operating income.

Worked Comparison

Two hypothetical bakeries each sell 8,000 loaves at $4.00 and earn the same $8,000 operating profit, but with different cost structures.

Bakery A might own its own ovens and employ salaried bakers. Bakery B might rent kitchen time by the hour and pay staff per batch.

Now suppose sales rise 10% to 8,800 loaves:

• Bakery A: 8,800 × $2.50 − $12,000 = $10,000, a 25% increase in operating income (10% × DOL of 2.5)
• Bakery B: 8,800 × $1.50 − $4,000 = $9,200, a 15% increase (10% × DOL of 1.5)

If sales fall 10% to 7,200 loaves:

• Bakery A: 7,200 × $2.50 − $12,000 = $6,000, a 25% decline
• Bakery B: 7,200 × $1.50 − $4,000 = $6,800, a 15% decline

Higher fixed costs magnify results in both directions. Bakery A gains more in good months and suffers more in bad ones, and it needs far more volume to break even. DOL is not a constant: it is specific to a sales level and becomes larger the closer the business operates to its breakeven point.

Operating leverage is separate from financial leverage, which comes from fixed interest costs on debt. Because interest is itself a fixed cost, a company with high operating leverage and heavy borrowing has its earnings magnified twice, and measures such as return on equity can swing widely.

Managing Cost Structure and Key Ratios

Managing cost structure involves choices such as leasing versus buying equipment, outsourcing versus doing work in-house, and salaried versus hourly or contract staff. Each choice shifts costs between fixed and variable.

Fixed Cost Ratio

The fixed cost ratio shows what share of revenue goes to fixed costs:

Fixed cost ratio = Fixed costs ÷ Net sales

For Bakery A at 8,000 loaves: $12,000 ÷ $32,000 = 37.5%. A rising ratio can signal that fixed costs are growing faster than sales or that sales are falling against a fixed base. There is no universal target for fixed costs as a percentage of revenue; acceptable levels depend on the industry and the business model, so the ratio is most useful when tracked over time or compared with close peers.

Fixed Charge Coverage Ratio

The fixed charge coverage ratio is a solvency measure that tests whether earnings can cover fixed financing obligations, including interest and lease payments. One common version:

Fixed charge coverage = (EBIT + Fixed charges before tax) ÷ (Fixed charges before tax + Interest)

“Fixed charges before tax” commonly means lease payments. They are added back to EBIT because they were already deducted in reaching it.

Hypothetical example: a company has monthly EBIT of $8,500, lease payments of $4,000 and interest of $500.

($8,500 + $4,000) ÷ ($4,000 + $500) = $12,500 ÷ $4,500 = about 2.8 times

Earnings before these charges cover fixed charges roughly 2.8 times. Lenders use this ratio, and stricter versions, when setting loan terms; a ratio near 1.0 leaves little room to absorb a drop in earnings.

Strategies for Managing Fixed Costs

Common approaches include:

• Raising utilization so fixed costs are spread over more units
• Renegotiating contracts for rent, insurance or software at renewal
• Converting fixed costs to variable through outsourcing, pay-per-use pricing, commission-based pay or flexible leases, which lowers breakeven at the cost of thinner margins in strong periods
• Refinancing debt to cut interest expense
• Reviewing discretionary fixed costs each budget cycle rather than renewing them by default

Limitations of the Fixed Cost Concept

Fixed cost is a simplifying model, and the simplification has limits:

• It holds only within the relevant range and time frame. Breakeven and operating leverage calculations break down when output moves into a new capacity step, and calling a cost fixed without stating the period can mislead.
• Classification requires judgment. Two analysts can classify the same company’s labor, utilities, maintenance or depreciation differently.
• Fixed costs still change. During periods of high inflation, contracts with indexation clauses can push fixed costs up faster than a business can raise prices.
• Per-unit fixed cost can mislead decisions. Using a fully allocated unit cost to decide whether to accept an extra order or drop a product can give the wrong answer. The relevant comparison for a one-off decision is usually incremental revenue against incremental (often variable) cost, plus any fixed costs that would actually change.

FAQs

The Bottom Line

Fixed costs matter to business owners, managers and analysts because they set the breakeven point and drive operating leverage. A company with heavy fixed costs needs more volume to break even and sees profits swing more sharply when sales rise or fall. Choices such as leasing versus buying or salaried versus contract staff shift that balance, and any fixed cost should be judged within a stated period and capacity range.