What Is the Break-Even Point? Formula and How to Calculate It

By Markets & Investing DeskUpdated Nov 10, 2026

Definition

The break-even point is the sales level where total revenue equals total costs, leaving zero profit and zero loss. It can be measured in units sold or in sales dollars.

Key takeaways

Break-even units equal fixed costs divided by the selling price minus variable cost per unit.
Break-even sales in dollars equal fixed costs divided by the contribution margin ratio.
In the lamp example, a 12% rise in variable cost lifts the break-even volume by 25%.
A call option breaks even at expiration when the stock reaches the strike price plus the premium paid.

The break-even point is the level of sales at which total revenue equals total costs, so the business earns zero profit and takes zero loss. It can be expressed in units (how many items must be sold) or in sales dollars (how much revenue must come in). Below that level the business loses money. Above it, every additional sale adds profit equal to its contribution margin.

How the Break-Even Point Works

Break-even analysis, also called cost-volume-profit (CVP) analysis in management accounting, sorts a business’s costs into two groups:

Fixed costs stay the same regardless of output within a normal operating range. Examples include rent, insurance, base salaries and equipment leases.
Variable costs rise and fall with each unit produced or sold. Examples include raw materials, packaging, direct labor paid per unit, shipping and sales commissions.

Part of each unit’s selling price goes immediately to that unit’s variable cost. What remains is the contribution margin: the amount each sale contributes toward fixed costs. The business breaks even once those contributions add up to total fixed costs.

Deriving the Formula From the Profit Equation

Profit for a single-product business can be written as:

Profit = Q × (P - VC) - FC

where Q is quantity sold, P is price per unit, VC is variable cost per unit and FC is total fixed costs. To find the break-even point, set profit to zero and solve for Q:

0 = Q × (P - VC) - FC, so Q = FC ÷ (P - VC)

Break-Even Point Formulas

Break-even point in units:

Break-Even Units = Fixed Costs ÷ (Selling Price per Unit - Variable Cost per Unit)

Break-even point in sales dollars:

Break-Even Sales = Fixed Costs ÷ Contribution Margin Ratio

The contribution margin ratio is the contribution margin per unit divided by the selling price, or total contribution margin divided by total sales. It tells you what share of each sales dollar is available to cover fixed costs.

The two formulas describe the same point. Break-even sales in dollars equals break-even units multiplied by the selling price. The dollar version is more practical for businesses that sell many products at different prices, such as retailers and service firms, where counting “units” is not meaningful.

Round a fractional unit result up, since a business cannot sell part of a unit.

Example of the Break-Even Point

Hypothetical example. A small company sells desk lamps. Its numbers for one month:

Fixed costs: $12,000 (rent, salaries, insurance, software).
Variable cost per lamp: $25 (parts, packaging, shipping).
Selling price per lamp: $40.
Contribution margin: $40 - $25 = $15 per lamp.
Break-even units: $12,000 ÷ $15 = 800 lamps.

The contribution margin ratio is $15 ÷ $40 = 37.5%, so break-even sales in dollars are $12,000 ÷ 0.375 = $32,000. That matches 800 lamps × $40. At 800 lamps, revenue of $32,000 covers $20,000 of variable costs (800 × $25) plus $12,000 of fixed costs.

Extending the Example

Target profit. To earn $3,000 in a month, add the target to fixed costs: ($12,000 + $3,000) ÷ $15 = 1,000 lamps.

Margin of safety. If the company expects to sell 1,100 lamps, its margin of safety is the cushion above break-even: (1,100 - 800) ÷ 1,100 ≈ 27%. Sales could fall by about that share before the business stops covering its costs.

Price changes. Raising the price to $45 lifts the contribution margin to $20 and lowers break-even to 600 lamps. A price cut has the opposite effect, and it may take a large increase in volume to make up for a small reduction in margin.

Cost changes. If parts costs rise and variable cost reaches $28, the margin falls to $12 and break-even rises to 1,000 lamps. A 12% increase in variable cost raises the break-even volume by 25%, because the whole effect lands on a thin margin.

How the Break-Even Point Is Used

In Business Decisions

Pricing: Shows how far a price change shifts the volume needed to cover costs.
Planning and budgeting: Gives a minimum sales target and a check on whether a forecast is realistic.
Cost structure choices: Swapping variable costs for fixed ones (for example, buying a machine instead of outsourcing) raises break-even but increases the profit on each unit above it, a trade-off known as operating leverage.
New products and projects: A quick estimate shows whether a launch can plausibly reach the volume it needs.
Product mix: Multi-product firms use a weighted average contribution margin, based on each product’s share of sales, to estimate a combined break-even point.
Funding: Lenders and investors often ask how far a business is from break-even.

A lower break-even point relative to expected sales signals resilience: a business that covers its costs at a modest share of capacity absorbs a downturn more easily than one that needs near-full output.

In Investing and Trading

For an investment, the break-even point is the price at which selling would return the original outlay including costs.

Stocks: Hypothetical example. Buying 100 shares at $50 with a $10 commission on the purchase and another $10 on the sale gives a break-even price of ($5,000 + $10 + $10) ÷ 100 = $50.20 per share, before taxes.
Call options: Break-even at expiration is the strike price plus the premium paid per share. A $300-strike call bought for a $50 premium breaks even when the stock reaches $350.
Put options: Break-even at expiration is the strike price minus the premium paid. A $300-strike put bought for $20 breaks even at $280.
Real estate: Investors estimate the rent or occupancy level at which income covers the mortgage payment, taxes, insurance and maintenance.
Prediction markets and betting: A contract breaks even when the chance of winning equals the price paid plus fees, as a share of the payout. A $0.60 contract paying $1, with no fees, must win more than 60% of the time to profit over many trades.

Accounting, cash and economic break-even. The standard calculation uses accounting costs. A cash break-even point leaves out non-cash fixed costs such as depreciation, so it shows the sales level needed to avoid burning cash. An economic break-even point also includes the opportunity cost of the capital tied up in the business, so it is higher than the accounting figure.

Operating break-even. This version counts operating costs only and excludes interest and taxes, which makes it the point where operating income (EBIT) is zero. Including interest gives a higher, financial break-even point.

Break-even point vs. payback period. Break-even is a sales volume for a given period. The payback period is the time it takes for cumulative cash flows to repay an initial investment. Neither accounts for the time value of money; for that, analysts turn to net present value (NPV) or the internal rate of return (IRR).

Break-even vs. profitability. Reaching break-even means costs are covered. It says nothing about whether the return is adequate relative to the capital invested, which measures such as return on equity (ROE) address.

Limitations of the Break-Even Point

Cost classification is imperfect. Many costs are semi-variable. Utilities, for example, have a fixed base charge and a usage component, and how they are split changes the result.
It assumes linear relationships. Volume discounts, overtime pay, economies of scale and price cuts to win volume all bend the constant-price, constant-cost lines.
Fixed costs are fixed only within a range. Beyond a certain output, more space, staff or equipment creates a new, higher break-even point.
It ignores demand. The formula shows how many units must be sold, not whether customers will buy them at that price.
Multi-product analysis depends on the mix. A shift toward lower-margin products raises the combined break-even point.
It is static. It ignores timing, the time value of money, taxes and financing costs unless these are added deliberately.

FAQs

Can a business have a negative break-even point or none at all?

If the selling price is at or below the variable cost per unit, the contribution margin is zero or negative and no sales volume can cover fixed costs. The business would need to raise prices, cut variable costs or change the product before break-even becomes possible.

The Bottom Line

Break-even analysis helps business owners, managers and investors see the minimum sales or price needed to cover costs. It is useful for pricing, budgeting and testing whether a forecast is realistic. Because it assumes linear costs, ignores demand and leaves out timing and financing unless added, it works best as a quick planning estimate alongside other measures.