Break-even point (BEP): formula, unit contribution, and examples
The break-even point (BEP) is the exact sales volume—measured in units or total revenue—where your total income equals all fixed and variable expenses, resulting in zero net profit and zero net loss. Knowing this threshold tells a business owner the minimum sales target required each month before the company starts generating actual profit.
Break-Even Point (Units) = Fixed Costs ÷ (Selling Price per Unit − Variable Cost per Unit). If monthly fixed expenses are 12,000 and you sell an item for 50 that costs 30 in variable cost, each unit contributes 20 and you break even at 600 units (30,000 in sales revenue).
The break-even formula and contribution margin
Break-even analysis separates business costs into fixed expenses that stay constant regardless of sales volume and variable costs that rise with every unit sold. Each sale first pays for its own direct variable cost; the remaining amount—called the contribution margin—goes toward paying off the monthly pool of fixed overhead.
All selling prices and costs in the formula should be taken net of sales tax or VAT. Three figures drive the calculation:
- Fixed costs: Recurring overhead paid regardless of sales, such as rent, base salaries, insurance, utilities, and software
- Variable cost per unit: Direct costs incurred only when a unit is sold, including purchase cost, packaging, and shipping
- Contribution margin per unit: Net unit selling price minus unit variable cost—the amount each sale contributes toward fixed costs
Calculating break-even in units vs. sales revenue
When analyzing a single product or standard service, dividing total fixed costs by the unit contribution margin gives the exact number of units needed to break even. For multi-product stores such as hardware shops, grocers, or boutiques, dividing fixed costs by the overall gross profit margin ratio (as a decimal) reveals the break-even revenue across the whole catalog.
Until sales reach the break-even threshold, the business operates at a loss for the period; once the threshold is crossed, every additional unit sold adds its full contribution margin directly to net profit. Testing price changes or rent increases against this formula prevents costly surprises.
Tracking expenses and break-even performance in GiroPS
In GiroPS, recording your operating expenses under clear Income & Expense Categories (such as rent, payroll, and utilities) shows your exact monthly fixed cost baseline. Meanwhile, the Profit & Loss report combines net sales, weighted average cost of goods sold, and operating expenses so you can see whether your business has cleared its break-even point for the selected period.
To model different pricing, cost, or overhead scenarios instantly, open our free online `break-even-calculator` tool and compare how discounts or cost changes shift your required sales volume.
Practical scenario
Worked example: monthly break-even units and revenue
A retail store has monthly fixed expenses of 12,000 covering rent, salaries, and utilities. It sells a product for 50 excluding tax, and the unit variable cost (weighted average purchase cost plus packaging) is 30. The contribution margin per unit is 50 − 30 = 20. Dividing 12,000 ÷ 20 gives a break-even volume of 600 units, or 600 × 50 = 30,000 in revenue (equivalently, 12,000 ÷ 0.40 gross margin = 30,000). Selling 600 units covers all costs; unit 601 onward generates 20 in pure profit per unit.
Frequently Asked Questions
How can a small business lower its break-even point?
You can lower your break-even threshold in three ways: reduce monthly fixed overhead, negotiate lower purchase or packaging costs to cut variable cost per unit, or raise selling prices to increase the unit contribution margin.
How do promotional discounts affect the break-even point?
Discounts reduce the unit contribution margin dollar-for-dollar, which raises the number of units you must sell. In the example above, a 10% discount lowers the price from 50 to 45, shrinking the contribution margin from 20 to 15 and raising the break-even volume from 600 units to 800 units.
How do I find break-even revenue when I sell many different items?
Divide your total fixed costs by your average gross profit margin expressed as a decimal. With 12,000 in fixed costs and a 40% (0.40) average gross margin, your monthly break-even revenue is 12,000 ÷ 0.40 = 30,000.