Break-Even Analysis Calculator
Determine your business break-even point with our comprehensive break-even analysis calculator. Whether you're launching a new product, planning pricing strategies, or evaluating business viability, understanding your break-even point is essential for sound financial planning. Calculate the exact number of units you need to sell to cover all costs, analyze your margin of safety, and visualize your cost structure with interactive charts.
Calculate Your Break-Even Point
How to Use This Calculator
- Enter Fixed Costs: Input your total fixed costs that remain constant regardless of sales volume (rent, salaries, insurance, loan payments).
- Enter Variable Cost per Unit: Input the direct costs required to produce one unit (raw materials, direct labor, shipping costs).
- Enter Selling Price: Input the price you charge customers per unit.
- Optional - Current Sales: If you want to analyze your margin of safety, enter your current sales volume.
- Calculate: Click the calculate button to see your break-even point in units and revenue, plus contribution margin analysis.
Understanding Break-Even Analysis
Break-even analysis is a fundamental business tool that helps you understand the relationship between your costs, volume, and profits. At the break-even point, your total revenues exactly equal your total costs, meaning you neither make a profit nor incur a loss.
Key Components:
- Fixed Costs: Expenses that don't change with production volume (rent, salaries, insurance)
- Variable Costs: Expenses that change proportionally with production (materials, direct labor)
- Contribution Margin: The difference between selling price and variable cost per unit
- Break-Even Point: Fixed Costs ÷ (Price per Unit - Variable Cost per Unit)
Business Applications
Break-even analysis serves multiple strategic purposes in business planning:
Pricing Decisions:
Use break-even analysis to set minimum pricing levels and evaluate the impact of price changes on profitability. Understanding your contribution margin helps determine pricing flexibility.
Product Launch Planning:
Before launching new products, calculate break-even points to assess market requirements and sales targets. This helps determine if a product is commercially viable.
Cost Control:
Identify the impact of reducing fixed or variable costs on your break-even point. Small reductions in costs can significantly lower your break-even requirements.
Method & sources
This calculator is educational, not advice. It estimates a break-even point from the numbers you enter; it is not accounting, tax, lending or business advice, and its result depends entirely on how accurate your cost and price estimates are. Check important decisions with a qualified accountant or adviser.
- Formula
Contribution margin per unit = Selling price per unit - Variable cost per unit.
Contribution margin ratio = (Contribution margin per unit / Selling price per unit) x 100.
Break-even point (units) = Fixed costs / Contribution margin per unit. The displayed figure is rounded UP to the next whole unit (you cannot sell part of a unit, and selling one fewer would leave a loss).
Break-even revenue = unrounded break-even units x Selling price per unit. Because it uses the unrounded unit figure, it can be slightly lower than the displayed whole-unit count multiplied by the price (e.g. 666.67 units x $35 = $23,333, not 667 x $35 = $23,345). Mathematically this equals Fixed costs / (Contribution margin ratio / 100).
Margin of safety (only when a current sales volume greater than 0 is entered): Current sales above break-even = Current sales units - unrounded break-even units; Margin of safety % = (Current sales above break-even / Current sales units) x 100. Both go negative when current sales are below break-even, and the page colours them as negative.
Validation stops the calculation, shows an error and hides any results panel from an earlier calculation, when: fixed costs are blank or below 0; variable cost per unit is blank or below 0; selling price is blank or not above 0; the selling price is not greater than the variable cost per unit (a zero or negative contribution margin means break-even is never reached); or a current sales figure is entered below 0.
The chart plots revenue (units x price), total costs (fixed costs + units x variable cost) and fixed costs across 0 to the largest of 1.5 x break-even units, 1.2 x current sales, or 100 units. It illustrates the figures above and does not feed any of them.
- Rounding
- All maths runs at full floating-point precision; rounding happens only on display. Break-even units are rounded up (Math.ceil). Current sales above break-even are rounded to the nearest whole unit. Break-even revenue (and the chart's axis and tooltips) is shown to the nearest whole dollar with no cents. Contribution margin per unit is shown to the cent, so $2.50 displays as $2.50 and $25 as $25.00. Percentages (contribution margin ratio and margin of safety) are shown to one decimal place.
- Inputs used
- Total fixed costs in $ (required, 0 or greater; 0 is accepted and gives a break-even of 0 units). Use one consistent period, monthly or annual.
- Variable cost per unit in $ (required, 0 or greater)
- Selling price per unit in $ (required, must be greater than 0 and greater than the variable cost per unit)
- Current sales volume in units (optional, 0 or greater; left blank or 0, the margin-of-safety section is hidden). It must cover the same period as the fixed costs.
- What this does not account for
- Taxes of any kind, including income tax on profit above break-even and sales tax on the price
- Financing costs such as loan interest, unless you include them yourself in fixed costs
- More than one product: the tool handles a single price and a single variable cost per unit, with no sales-mix weighting
- Semi-variable or stepped costs (for example, a second shift or extra premises needed above a certain volume): fixed costs are assumed constant and variable cost per unit is assumed the same at every volume
- Volume discounts, price changes as sales grow, returns or bad debts
- Timing and cash flow: break-even here is an accounting volume for one period, not the date your cash balance turns positive
- Any buffer for unexpected costs; nothing is added to the figures you enter
- Jurisdiction
- Not jurisdiction-specific. Break-even arithmetic is the same everywhere; the page formats money in US dollars only, and no tax or regulatory rule of any country is applied.
- Source
- U.S. Small Business Administration, "Plan your business" (Calculate your startup costs: break-even point)
- Effective date
- Not date-sensitive: break-even point, contribution margin and margin of safety are fixed accounting relationships, not values that change on a schedule.
- Version
- 1.1
- Last substantive review
- 2026-09-23
- Limitations
- The SBA page gives the units formula verbatim ("Break-even point (units) = fixed costs ÷ (sales price per unit – variable cost per unit)") and the ratio formula for what it calls contribution margin ((sale price per unit - variable cost per unit) ÷ sale price per unit). This tool uses the same maths but names them differently: its "Contribution Margin per Unit" is the dollar difference, and its "Contribution Margin Ratio" is the SBA's contribution margin shown as a percentage.
- The SBA page does not cover margin of safety. The margin-of-safety formulas above are the standard managerial-accounting definitions, verified against this tool's own source code, not quoted from the SBA.
- The SBA page suggests adding a little extra, such as 10%, to cover miscellaneous expenses you cannot predict. This tool adds nothing; build any buffer into your fixed or variable cost figures yourself.
- The input fields show placeholder examples only (10000, 25.00, 50.00, 500); nothing is pre-filled, and none of these is a benchmark for any real business.
Reference cases
Five worked examples you can check by hand against the formula above.
Reference case 1: Typical case with margin of safety: $10,000 fixed costs, $25 variable cost, $50 price, 500 units currently sold
- Total fixed costs: $10,000
- Variable cost per unit: $25
- Selling price per unit: $50
- Current sales volume: 500 units
Result: Break-even point 400 units. Break-even revenue $20,000. Contribution margin per unit $25.00. Contribution margin ratio 50.0%. Current sales above break-even 100 units. Margin of safety 20.0%.
Reference case 2: Fractional break-even, rounded up; no current sales entered (margin-of-safety section hidden): $10,000 fixed costs, $20 variable cost, $35 price
- Total fixed costs: $10,000
- Variable cost per unit: $20
- Selling price per unit: $35
- Current sales volume: (blank)
Result: Break-even point 667 units (666.67 rounded up). Break-even revenue $23,333 (from the unrounded 666.67 units, not 667 x $35). Contribution margin per unit $15.00.Contribution margin ratio 42.9%. Margin-of-safety section not shown.
Reference case 3: Zero fixed costs (boundary): $0 fixed costs, $5 variable cost, $10 price, 100 units currently sold
- Total fixed costs: $0
- Variable cost per unit: $5
- Selling price per unit: $10
- Current sales volume: 100 units
Result: Break-even point 0 units. Break-even revenue $0. Contribution margin per unit $5.00.Contribution margin ratio 50.0%. Current sales above break-even 100 units. Margin of safety 100.0%.
Reference case 4: Sales below break-even, and a contribution margin with cents:$5,000 fixed costs, $12.50 variable cost, $15 price, 1,500 units currently sold
- Total fixed costs: $5,000
- Variable cost per unit: $12.50
- Selling price per unit: $15
- Current sales volume: 1,500 units
Result: Break-even point 2,000 units. Break-even revenue $30,000. Contribution margin per unit $2.50.Contribution margin ratio 16.7%. Current sales above break-even -500 units. Margin of safety -33.3% (both shown as negative).
Reference case 5: Price equal to variable cost (validation branch): $1,000 fixed costs, $20 variable cost, $20 price
- Total fixed costs: $1,000
- Variable cost per unit: $20
- Selling price per unit: $20
- Current sales volume: (blank)
Result: No results; the results panel is hidden. Error shown: "Selling price per unit must be greater than variable cost per unit to generate profit."
Change log
| Date | Change |
|---|---|
| 2026-09-23 | Card published (T-801). Formula, validation, rounding and all five reference-case results verified two ways: an independent Python re-implementation of business/break-even/break-even-calculator/js/break-even-calculator.js, and the live page driven in a headless browser (Playwright) with each scenario's inputs. Both matched every displayed figure. Source page fetched and checked on the same date. |
| 2026-09-23 | FCH-ISS-32: contribution margin per unit is now shown to the cent ($2.50, no longer rounded to $3), and a validation error now hides the results panel from an earlier calculation instead of leaving old results on screen. The two limitations describing those defects were removed, the rounding and validation statements updated, and the contribution figures in the reference cases changed to cents. No calculation changed. All five reference cases re-verified on the live page in a headless browser (Playwright). |
Frequently Asked Questions (FAQ)
FAQ Index
The break-even point is the level of production or sales where total costs equal total revenues, resulting in zero profit or loss. It's the minimum number of units you need to sell to cover all your business costs.
Break-even point (in units) = Fixed Costs ÷ (Price per Unit - Variable Cost per Unit). For break-even in revenue: Break-even point (units) × Price per Unit.
Fixed costs remain constant regardless of production volume (rent, salaries, insurance). Variable costs change with production levels (raw materials, direct labor, shipping).
Margin of safety is the difference between actual sales and break-even sales, expressed as a percentage. It shows how much sales can decline before the business reaches its break-even point.
Perform break-even analysis whenever you change prices, add new products, experience cost changes, or during regular business planning cycles (quarterly or annually).