Break-Even Calculator

Break-Even Point (in units) = Fixed Costs / (Price per Unit – Variable Cost per Unit). The denominator, (Price per Unit – Variable Cost per Unit), is called the contribution margin per unit — it represents the amount from each sale that goes toward covering fixed costs after paying for variable costs. Fixed costs are expenses that remain constant regardless of the number of jobs (e.g., rent, insurance, salaries). Variable costs change with each job (e.g., materials, subcontractor fees). The formula calculates the exact number of jobs needed so that total revenue equals total costs, resulting in zero profit. If you need break-even in revenue, multiply the unit break-even by the price per unit. This calculation is critical because it sets a clear target: below this number, you lose money; above it, you earn profit. The logic is straightforward: each sale first covers its own variable cost, then contributes a fixed amount to fixed costs. Only after enough sales have covered all fixed costs does profit begin. The formula assumes linear costs and constant prices, which is a simplification but a powerful starting point for planning.

A good break-even number is one that is realistically achievable given your market and capacity. If the break-even point is very high relative to your potential customer base or your ability to deliver, you may need to reduce fixed costs, raise prices, or lower variable costs. A low break-even point (e.g., fewer than 10 jobs per month) offers flexibility and lower risk. Conversely, a high break-even point (e.g., 50+ jobs per month) demands strong sales volume and can be risky in slow periods. There is no universal 'good' number—it depends on your industry, pricing, and cost structure. The key principle is that your break-even should be below your realistic monthly volume by a comfortable margin (e.g., 20-30% lower) to allow for profit and fluctuations. Monitor your fixed costs—they are the lever you control most directly. Also, note that break-even analysis is a static snapshot; in reality, costs and prices change, so revisit it regularly.

A common mistake is forgetting to include all fixed costs, such as owner's salary, depreciation, or periodic expenses (e.g., annual insurance divided monthly). Another error is using average variable costs when they vary significantly per job—use the most common or weighted average. People also confuse break-even units with break-even revenue; always clarify which you need. Edge cases: if price per job equals variable cost, the contribution margin is zero and break-even is infinite—you can never cover fixed costs; you must raise price or cut variable costs. If variable costs exceed price, you lose money on every job—break-even is impossible. Also, seasonal businesses must calculate break-even for the slow season separately, not annualized. Finally, break-even assumes all jobs are identical; if you offer multiple services with different margins, use a weighted average contribution margin.

Fixed Costs

Expenses that do not change with the number of jobs, such as rent, salaries, and insurance.

Variable Costs

Expenses that vary directly with each job, like materials, supplies, or subcontractor fees.

Contribution Margin

The amount each job contributes to covering fixed costs, calculated as price minus variable cost per job.

Break-Even Point

The number of jobs (or revenue) at which total revenue equals total costs, resulting in zero profit or loss.