Break-Even Calculator

About this Break-Even Calculator

The Break-Even Calculator estimates how many units must be sold before contribution from sales covers fixed costs. It is a planning tool for simple unit-based business models and pricing scenarios.

Knowing your break-even point, the sales volume at which total revenue exactly equals total costs, is one of the most fundamental financial planning steps for any new product or business, since it tells you the minimum performance needed before a venture starts generating actual profit.

For related tasks, try Profit Margin Calculator, Markup Calculator or Savings Goal Calculator.

How the calculation works

Contribution per unit equals selling price minus variable cost. Break-even units equal fixed costs ÷ contribution per unit. The model assumes those values stay constant across the relevant sales range.

How to use it

1. Enter fixed costs.
2. Enter selling price and variable cost per unit.
3. Calculate to estimate break-even units and revenue.

Practical example

With fixed costs of 10,000, a price of 50 and variable cost of 30, contribution is 20 per unit and break-even volume is 500 units.

A product with 10,000 in fixed costs, a 50 selling price and 30 in variable cost per unit has a contribution margin of 20 per unit, meaning break-even occurs at 500 units sold, the point where cumulative profit finally turns positive.

Things to double-check

This calculation assumes fixed costs and the per-unit variable cost and price stay constant regardless of volume, which is a reasonable simplification at moderate scale but can break down at very high volumes where bulk discounts or additional overhead change the actual per-unit costs.

How to read the break-even number

Break-even units equal fixed costs divided by the contribution margin, which is the selling price minus the variable cost of one unit. The contribution margin is the part of each sale left over after the costs that rise with every unit, and it is what pays for the costs that do not. With fixed costs of 6,000 a month, a price of 40 and a variable cost of 25, each unit contributes 15, so you need 400 units, which is 16,000 in revenue. Below 400 units you make a loss, and every unit above it adds 15 of profit. If you expect to sell 550 units, your margin of safety is 150 units, or about 27 percent of expected sales. Always round the unit figure up, because you cannot sell a fraction of a unit.

Where break-even analysis is used

Break-even thinking is useful any time you commit money before you know the demand. A small shop owner can test whether a new rented stall is worth it, a cafe can see how many cups must be sold each month to cover rent and a salary, and an event organiser can work out how many tickets must be sold before the venue bill is covered. Freelancers use it too: divide monthly overheads by the margin on an hour of billable work to see how many hours must be sold before any income is left for yourself. It also lets you test price changes quickly. Raising the price in the first example from 40 to 44 lifts the contribution to 19 and lowers break-even to about 316 units.

Tips for realistic inputs

The result is only as honest as the costs you enter. Fixed costs should include everything that does not change with volume, such as rent, salaries, insurance, software, loan repayments and a fair share of marketing. Variable costs should include materials, packaging, delivery, payment processing fees and sales commissions. A common mistake is to divide total costs by units and treat that average as the variable cost, which double counts the fixed part. Remember that costs can move in steps: if you hire a second employee when volume doubles, fixed costs rise and the break-even point moves with them. Keep all figures on the same period, such as one month, and revisit the numbers when prices from suppliers change.

Break-even in revenue and in time

You can express break-even as revenue instead of units. Divide the contribution per unit by the price to get the contribution ratio, which is 37.5 percent in the earlier example (15 divided by 40), then divide fixed costs by that ratio: 6,000 divided by 0.375 is 16,000 of revenue. The same idea tells you how long it will take. If you sell about 25 units a week, 400 units takes 16 weeks. If you also had a start-up cost of 12,000, divide it by the monthly profit you expect after break-even to estimate the payback period. These time figures help you decide whether you can survive the early months before profit arrives.

How price and cost changes move the break-even point

Small changes in price or cost can move break-even by a lot, because they act on a narrow margin. In the example with fixed costs of 6,000, a price of 40 and a variable cost of 25, break-even is 400 units. If the variable cost rises 10 percent to 27.50, the contribution falls to 12.50 and break-even rises to 480 units, an increase of 20 percent. If you instead cut the price by 10 percent to 36, the contribution falls to 11 and you need about 546 units, an increase of 36 percent. Discounting is therefore more dangerous than it looks, and it is worth running these what-if cases before you promise a lower price.

A step-by-step example: a small bakery

Imagine a bakery whose monthly fixed costs are rent of 900, utilities of 250, wages of 1,400, insurance of 100 and a loan repayment of 350, which adds up to 3,000. A loaf sells for 4.50, and each loaf costs 1.20 in ingredients, 0.30 in packaging and 0.10 in card fees, so the variable cost is 1.60 and the contribution is 2.90. Dividing 3,000 by 2.90 gives 1,034.5, so the bakery must sell 1,035 loaves a month, about 34.5 a day over 30 days, before it makes any profit. If the owner also wants 1,200 a month for themselves, the target becomes 4,200 divided by 2.90, which is 1,448.3, so 1,449 loaves, or about 48 a day. Seeing the daily number turns an abstract formula into a clear sales goal.

Break-even for freelancers and service businesses

A service business has the same logic, but the unit is an hour or a project. Suppose a freelancer has monthly costs of 1,800 for software, insurance, a shared workspace and tax contributions, charges 45 an hour and spends about 5 per billable hour on tools and travel. The contribution is 40 per hour, so 1,800 divided by 40 means 45 billable hours to cover costs. The catch is utilisation: of 160 working hours a month, perhaps only 80 can be billed because the rest goes on finding clients and admin. To earn 3,000 on top of costs, the freelancer needs contribution of 4,800 over 80 hours, which is 60 per hour, so the price would have to rise to about 65 an hour. This is why freelance rates look high compared with salaries.

Break-even with more than one product

Most businesses sell several products, so a single break-even figure needs a sales mix. Suppose product A sells for 20 with a variable cost of 12, giving a contribution of 8, and product B sells for 50 with a variable cost of 30, giving 20. If you expect to sell three units of A for every one unit of B, the average contribution per unit is (3 times 8 plus 20) divided by 4, which is 11. With fixed costs of 8,800, break-even is 800 units in total, made up of 600 of A and 200 of B. If customers shift toward equal numbers of each, the average contribution rises to 14 and break-even falls to about 629 units. The lesson is that the mix matters as much as the volume, so track which products actually sell.

Limits of the model and how to use it well

Break-even analysis assumes that prices and unit costs stay constant, that you can sell everything you produce and that fixed costs really are fixed across the range you are looking at. In real life, bulk discounts, overtime, new hires and extra rent can change the figures as volume grows. It also measures accounting profit, not cash: if you must buy stock weeks before you sell it, you can pass the break-even point and still run short of cash. Use the result as a planning tool, rerun it when a price or cost changes, and combine it with a simple monthly cash forecast. Treat the margin of safety, the gap between your expected sales and break-even, as the real measure of how much risk you carry.

Key terms explained

Fixed costs are expenses that stay the same however many units you sell in a period, such as rent, salaries, insurance, software subscriptions and loan repayments. Variable costs rise with every unit, for example materials, packaging, delivery, card fees and sales commission. The contribution margin is the selling price minus the variable cost of one unit, and it is the amount each sale contributes toward fixed costs and then profit. The margin of safety is the gap between expected sales and the break-even level, often shown as a percentage of expected sales. Target profit analysis adds the profit you want to the fixed costs before dividing by the contribution.

Rules of thumb and quick checks

If the contribution is 30 percent of the price, the break-even revenue is the fixed costs divided by 0.30, so 6,000 of fixed costs needs 20,000 of sales. If fixed costs rise by 10 percent, the break-even volume rises by 10 percent, while a 5 percent price rise with a variable cost at 60 percent of the old price lifts the contribution by 12.5 percent and lowers break-even by about 11 percent. A common safety guide is to plan for sales at least 20 percent above break-even. If your results show a break-even above your realistic capacity, the plan needs a different price, cost structure or scale.

Read the full guide

Want the background, a step-by-step example and the common mistakes? Read Markup vs Margin: How to Price a Product and Protect Your Profit. Markup and margin are not the same. Learn both formulas, how to convert between them, how to price for a target margin and how discounts reduce profit.

Frequently asked questions