Your break-even point is the sales level where total revenue equals total costs. Below that number, you’re operating at a loss. Above it, you’re generating profit. Knowing your break-even helps you set realistic sales goals, evaluate pricing decisions, and understand how much cushion you have when business slows down.

Finding your break-even requires separating your costs into two categories. Fixed costs stay the same regardless of sales volume. Rent, insurance, loan payments, software subscriptions, and salaries for employees not tied directly to production all fall into this bucket. These expenses hit your books whether you have a great month or a terrible one.

Variable costs increase or decrease based on how much you sell. Materials, direct labor, shipping, and sales commissions are common examples. If you double your sales, these costs roughly double too.

The basic formula divides your fixed costs by your contribution margin. Contribution margin is what’s left after subtracting variable costs from your selling price. If you charge $200 for a service and your variable costs are $50 per job, your contribution margin is $150. That $150 from each sale goes toward covering your fixed costs.

Say your monthly fixed costs total $9,000. With a $150 contribution margin per job, you divide $9,000 by $150 to get 60. You need 60 jobs per month to break even. Job 61 and beyond is where profit starts.

For businesses that don’t sell discrete units, use the contribution margin ratio instead. If variable costs are 40% of revenue, your contribution margin ratio is 60%. Divide fixed costs by 0.60 to find your break-even in sales dollars.

The math is simple, but getting accurate inputs is where most business owners struggle. Reliable bookkeeping services matter here because your break-even calculation is only as good as your underlying cost data. Putting a variable cost in the fixed bucket or vice versa throws off your number. Some costs don’t fit neatly into either category. A warehouse worker’s base pay is fixed, but overtime is variable. Your phone bill has a fixed component plus usage charges. Working through these details takes time but produces a number you can actually rely on.

Break-even isn’t something you calculate once and forget. Your costs shift, your prices change, and your product or service mix evolves. Reviewing it quarterly or whenever something significant changes tells you whether your business model is getting stronger or weaker. It also lets you run scenarios before big decisions. What happens to your break-even if you hire another employee? If you raise prices by 10%? If a major expense goes away?

This kind of ongoing financial analysis is exactly what fractional CFO support provides. Instead of guessing whether a decision makes financial sense, you have real numbers tailored to your business and someone to help you interpret them.