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How to Calculate Break-Even Point: Formula, Steps, and Real Examples

By AnalystAI Editorial Team • Updated 2026-10-08 • 6 min read

How to calculate your break-even point in under two minutes

To find your break-even point, divide your total fixed overhead costs by your contribution margin per unit (selling price minus variable cost per unit).

$$\text{Break-Even Units} = \frac{\text{Fixed Costs}}{\text{Selling Price} - \text{Variable Cost per Unit}}$$

If your monthly fixed overhead is $30,000, you sell each unit for $50, and each unit costs $20 to produce and ship, your contribution margin is $30 per unit. Dividing $30,000 by $30 gives exactly 1,000 units. Selling 1,000 units ($50,000 in revenue) covers all expenses with zero profit and zero loss.

You can run your own figures instantly on our free Break-Even Calculator.

The three components of break-even analysis

Break-even calculations depend on three distinct variables:

1. Fixed costs

Fixed costs remain unchanged regardless of how many units you sell each month.

  • Warehouse or commercial office rent
  • Salaries for full-time employees
  • Insurance policies, accounting retainers, and software subscriptions
  • Equipment depreciation

2. Variable costs per unit

Variable costs scale directly with every sale made.

  • Raw materials and manufacturing costs
  • Packaging, custom boxes, and packing tape
  • Shipping carrier postage and fulfillment pick-pack fees
  • Merchant processing charges (typically 2.9% + $0.30 per credit card transaction)

3. Selling price per unit

The gross revenue collected per item sold before sales taxes or external duties.

Detailed worked example: Physical product manufacturer

Let us examine a custom furniture manufacturer with the following quarterly numbers:

  • Quarterly fixed costs: $45,000 (workshop lease $18k, base wages $22k, utilities $3k, software $2k)
  • Average desk selling price: $450
  • Variable costs per desk: $180 (hardwood lumber $110, metal legs $45, hardware & packaging $15, payment fee $10)

Step-by-step arithmetic:

  1. Contribution margin per unit: $450 − $180 = $270
  2. Contribution margin ratio: $270 ÷ $450 = 60.0%
  3. Break-even units: $45,000 ÷ $270 = 167 desks per quarter
  4. Break-even revenue: 166.67 × $450 = $75,000

To produce $20,000 in net profit for the quarter, the target formula adjusts to: $$\text{Target Volume} = \frac{$45,000 + $20,000}{$270} = 241\text{ desks}$$

Why break-even analysis fails in practice

While the arithmetic is straightforward, four common operational errors cause break-even projections to miss actual results:

  1. Step-fixed costs: Rent and staff rarely stay flat forever. When volume grows beyond a specific threshold, you must lease a second warehouse or hire a supervisor.
  2. Ignoring customer returns: If a business has an 8% return rate, it must produce and sell more gross units to maintain the required net contribution margin.
  3. Price discounting: Promotional sales lower average realized prices, shrinking the contribution margin and pushing the break-even threshold further out.
  4. Owner wages excluded: Founders frequently omit their own market-rate compensation, artificially understating the required break-even revenue.
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AnalystAI Editorial Team

The AnalystAI Editorial Team verifies financial models, formulas, and data analysis best practices to provide deterministic calculations for founders, finance operators, and analysts.