Break-Even Calculator

What This Calculator Does

The break-even point is the number of units you need to sell to cover all your costs. Below that point, you lose money. Above it, you profit. This calculator takes your fixed costs, variable cost per unit, and selling price, then shows exactly how many units you need to sell and how much revenue that requires. It also generates a visual chart showing where revenue crosses total costs.

Break-even analysis is one of the most fundamental tools in business planning. It tells you whether a product idea is viable before you invest in production. It helps you set prices. It shows how changes in cost structure affect profitability. Every business school teaches it, and every entrepreneur should understand it.

Once you know your break-even point, use our Margin Calculator to check if your pricing delivers adequate profit margins. For broader financial planning, our Cash Flow Calculator shows how operating cash flow supports your business.

Inputs Required

• Fixed Costs: Costs that do not change with production volume (rent, salaries, insurance, equipment depreciation)
• Variable Cost Per Unit: The cost to produce one additional unit (materials, direct labor, packaging, shipping)
• Price Per Unit: The selling price of one unit

Outputs Provided

• Break-Even Units: The number of units you must sell to cover all costs
• Break-Even Revenue: The total revenue needed at the break-even point
• Contribution Margin: Price per unit minus variable cost per unit (what each sale contributes to covering fixed costs)
• Contribution Margin Ratio: Contribution margin as a percentage of price
• Break-Even Chart: Visual showing where revenue intersects total costs

How the Calculation Works

The break-even formula is built on the concept of contribution margin. Each unit sold contributes a certain amount toward covering fixed costs. Once fixed costs are covered, every additional dollar of contribution margin becomes profit.

For example, if you sell a product for $25, it costs $15 to make, and your fixed costs are $10,000 per month, your contribution margin is $10 per unit. You need to sell 1,000 units ($10,000 / $10) to break even. At 1,000 units, your revenue is $25,000, your variable costs are $15,000, and your fixed costs are $10,000. Revenue minus total costs equals zero.

How to Use the Calculator

1. Enter your total fixed costs for the period you are analyzing (monthly, quarterly, or annually)
2. Enter the variable cost to produce one unit, including materials, direct labor, and per-unit shipping
3. Enter the selling price per unit
4. Review the break-even point in units and revenue
5. Use the chart to visualize how profit grows as you sell beyond the break-even point

Example Calculations

Example 1: Coffee Shop

A coffee shop has $8,000 in monthly fixed costs (rent, utilities, insurance, salaries). Each coffee costs $1.50 to make (beans, milk, cup, lid) and sells for $4.50.

• Contribution margin: $3.00 per coffee
• Break-even: 2,667 coffees per month ($8,000 / $3.00)
• Break-even revenue: $12,000 per month
• That is about 89 coffees per day in a 30-day month

Example 2: SaaS Company

A SaaS company has $50,000 in monthly fixed costs (salaries, servers, office). Each subscription costs $5 in variable costs (payment processing, cloud usage per user) and sells for $50/month.

• Contribution margin: $45 per subscription
• Break-even: 1,111 subscribers ($50,000 / $45)
• Break-even revenue: $55,550 per month
• Contribution margin ratio: 90%

Real World Scenarios

Pricing a New Product

An entrepreneur is launching a premium candle brand. Fixed costs for the first year are $45,000 (commercial kitchen rental, equipment, insurance, marketing). Each candle costs $8 to produce (wax, wick, jar, fragrance, label, shipping) and she is deciding between a $24 and $28 price point. At $24, the contribution margin is $16 and she needs to sell 2,813 candles. At $28, the margin is $20 and she needs 2,250 candles. The $4 price increase reduces her break-even volume by 563 units, or 20%. If she believes she can sell 2,500 candles regardless of price, the $28 price generates $5,000 in profit while the $24 price loses $5,000. The calculator lets her model both scenarios instantly.

Evaluating a Cost Reduction

A manufacturer currently has $120,000 in monthly fixed costs and a $20 contribution margin, giving a break-even of 6,000 units. They are considering automating part of their production line, which would increase fixed costs by $15,000 per month (equipment lease) but reduce variable cost per unit by $5, increasing the contribution margin to $25. New break-even: $135,000 / $25 = 5,400 units. The automation actually lowers the break-even point by 600 units. At their current volume of 7,000 units per month, the old setup generates $20,000 in profit. The new setup generates $40,000. The automation pays for itself and then some.

Multi-Product Break-Even

A bakery sells three products: bread ($6, variable cost $2), cake ($25, variable cost $10), and pastries ($4, variable cost $1.50). Fixed costs are $5,000/month. To calculate break-even with multiple products, you need a sales mix assumption. If the bakery sells 50% bread, 30% pastries, and 20% cake by volume, the weighted average contribution margin is (0.5 x $4) + (0.3 x $2.50) + (0.2 x $15) = $2 + $0.75 + $3 = $5.75. Break-even: $5,000 / $5.75 = 870 total units. This simplification works for planning but requires accurate sales mix estimates.

Common Mistakes to Avoid

• Misclassifying costs: Some costs are semi-variable. A salaried employee is fixed, but overtime is variable. Electricity has a fixed component (basic service charge) and a variable component (usage). Split these accurately
• Ignoring economies of scale: Variable cost per unit often decreases as volume increases due to bulk purchasing discounts. The calculator uses a single variable cost, so test different scenarios at different volume levels
• Forgetting that break-even is not profit: Reaching break-even means you have covered costs but earned zero profit. You need to sell beyond break-even to generate actual profit
• Using unrealistic price assumptions: The price you want to charge may not be the price the market accepts. Test break-even at multiple price points to understand your margin of safety

Limitations of This Calculator

This calculator assumes a single product with constant variable costs and a fixed selling price. It does not handle multi-product scenarios, variable cost changes at different volume levels, or price discounts for bulk orders. It does not account for taxes, depreciation methods, or financing costs. The model is linear, meaning it assumes costs and revenue scale proportionally with volume, which may not hold at very high or very low production levels. For complex business planning, consult a CPA or use dedicated business planning software.

Authoritative Research & Resources

• SBA - Break-Even Analysis for Your Business - The US Small Business Administration's guide to break-even analysis, explaining how to calculate fixed and variable costs and use the results for business planning.
• Investopedia - Break-Even Analysis - A comprehensive reference covering the break-even formula, contribution margin, and how to apply break-even analysis to real business decisions.
• SCORE - Break-Even Point Calculation - SCORE's mentor-reviewed guide to calculating break-even, with practical examples for small businesses and service providers.