How to Calculate Your Business Break-Even Point

What is a business break-even point?

Your break-even point is the sales level at which total revenue equals total costs. At that level, your business is not generating an operating profit or an operating loss under the assumptions in your model. Knowing this threshold helps you evaluate prices, cost structures, and sales targets before committing money.

Break-even analysis is especially useful when launching a product, signing a lease, hiring staff, or considering a price change. It is a planning estimate, not a prediction of demand.

Understand fixed and variable costs

Fixed costs generally remain the same within a relevant range of activity. Examples include monthly rent, baseline insurance, and some software subscriptions. Fixed costs can still change over time or when you expand capacity.

Variable costs change with sales volume. Examples include ingredients, packaging, transaction fees, and per-unit production labor. Some costs are mixed; for a simple break-even calculation, separate the fixed and variable portions as reasonably as possible.

The break-even formula

For a business selling one product, break-even units equal fixed costs divided by contribution margin per unit. Contribution margin per unit is the selling price minus variable cost per unit.

Suppose a business sells an item for $40, incurs $16 in variable cost per item, and has $4,800 in monthly fixed costs.

• Selling price per unit: $40.
• Variable cost per unit: $16.
• Contribution margin per unit: $40 − $16 = $24.
• Break-even volume: $4,800 ÷ $24 = 200 units per month.
• Break-even revenue: 200 × $40 = $8,000 per month.

At 200 units, revenue is $8,000. Variable costs are $3,200 and fixed costs are $4,800, leaving $0 in operating profit under these assumptions.

What if you sell fewer or more units?

At 150 units, contribution is 150 × $24 = $3,600, which is $1,200 short of fixed costs. At 250 units, contribution is $6,000, leaving $1,200 after fixed costs. This comparison shows why break-even volume matters more than revenue alone.

You can model your own numbers with the free Break-Even Calculator.

How pricing changes your break-even point

Suppose you raise the price from $40 to $44 and variable cost stays at $16. Contribution margin rises to $28 per unit. Break-even volume becomes $4,800 ÷ $28, or approximately 172 units when rounded up to whole sales.

That lower threshold does not prove a price increase is a good decision. Customers might buy fewer units at the higher price. Break-even analysis tells you what must happen financially; customer research and actual sales tell you what is plausible.

Common mistakes to avoid

• Leaving out costs: Include applicable payment processing, returns, fulfillment, and other variable expenses.
• Mixing time periods: Use monthly fixed costs with monthly sales targets, not annual costs with monthly volume.
• Ignoring product mix: If products have different margins, a single-product formula can mislead. A weighted contribution margin may be more appropriate.
• Treating break-even as cash flow: Loan principal, equipment purchases, taxes, and timing differences can affect cash even when accounting profit is near zero.
• Assuming demand: Reaching break-even requires customers to actually buy the projected volume.

Turn the calculation into a decision

Start with conservative estimates, calculate break-even volume, and compare it with realistic capacity and demand. Then test a higher cost scenario and a lower sales scenario. If the required volume exceeds what your operation can deliver, revisit the price, variable costs, fixed costs, or business model.

Next step: Try several scenarios in the BizToolLab Break-Even Calculator, and compare your expected margins using the Profit Margin Calculator.