Break-Even Calculator

How the break-even point is calculated

Your break-even point is where total revenue equals total costs, the moment a business stops losing money and the next sale becomes profit. It rests on one number, the contribution margin: the price of a unit minus the variable cost of that unit. That margin is what each sale contributes toward your fixed costs.

The formula the calculator uses is:

• Contribution margin = Price per unit − Variable cost per unit
• Break-even units = Fixed costs ÷ Contribution margin
• Break-even revenue = Break-even units × Price (or Fixed costs ÷ contribution-margin ratio)

A worked example

Say your fixed costs are $10,000 a month, you sell a product for $50, and each one costs you $20 in materials and fees. Your contribution margin is $50 − $20 = $30 per unit. Divide $10,000 by $30 and you break even at about 334 units, or roughly $16,700 in revenue. Sell more than that and each unit drops $30 to your bottom line; sell fewer and you are covering costs out of pocket. This is the same math behind a full break-even analysis, explained step by step.

How to lower your break-even point

Because the point is fixed costs divided by contribution margin, only two forces can pull it down: a bigger margin on each sale, or a smaller fixed base to cover. Raising price widens the margin fastest — the extra dollar is almost pure contribution — while shaving the variable cost per unit gets there from the other direction. Cutting fixed costs attacks the number you're dividing into instead. In practice a modest price increase usually beats an equivalent cost cut, and the calculator lets you prove it by changing one input at a time.

Break-even in units, revenue, and time

The same analysis answers three questions. Break-even in units tells you how many you must sell; in revenue, how much you must bill; and, paired with an expected monthly sales rate, roughly when you will get there. Lenders and investors care about the last one most — a break-even that arrives in month four is fundable; one that needs three years of flawless execution is a red flag.

Fixed costs vs. variable costs

Splitting costs correctly is what makes the number trustworthy. Fixed costs stay the same regardless of sales — rent, salaries, insurance, software. Variable costs rise with each unit — materials, packaging, shipping, payment fees, hourly production labor. Some costs are mixed (a phone plan with overage charges, say); split them into their fixed and variable parts rather than dropping them into one bucket, or your break-even will be off.

Where break-even math goes wrong

The usual errors are bookkeeping, not arithmetic. Dropping a variable cost into the fixed bucket (or the reverse) quietly shifts the whole answer. Forgetting to pay yourself — a salary that belongs squarely in fixed costs — flatters the number. And the figure is a moving target: it drifts every time your price or costs change, so a break-even you calculated last year is probably wrong today. The one case that breaks the model entirely is a variable cost that meets or exceeds price — then there is no break-even at all, and selling more only deepens the loss.

Break-even is also the floor under your pricing and your unit economics. If the number of units looks unreachable for your market, the fix is upstream, a higher price, a lower variable cost, or leaner fixed costs, not a more optimistic forecast.