Business Break-Even Point Calculator

Fixed cost vs variable cost

The single most common error in break-even analysis is misclassifying costs. Fixed costs do not change as you sell more or fewer units in a given period. Examples: monthly office rent, full-time salaries, software subscriptions, insurance, accounting and legal retainers. Variable costs scale directly with unit volume. Examples: raw materials, packaging, per-order shipping, payment processor fees per transaction, commission paid on each sale. Some costs sit in a gray zone (semi-variable), like a salesperson on base salary plus commission, where part is fixed and part scales. Split the gray costs into their two components when entering them into the calculator.

What contribution margin tells you

Contribution margin per unit is the cash each sale leaves over after paying its own variable cost. If you sell a forty-dollar product with twelve dollars of variable cost, the contribution margin is twenty-eight dollars. Every unit you sell beyond break-even adds twenty-eight dollars to the bottom line. The contribution margin ratio (contribution margin divided by price) tells you what percentage of revenue is available to cover fixed costs and profit. The same example has a 70 percent contribution margin ratio. Compare that ratio across products to know which ones to push: a high-ratio product is more efficient at covering fixed costs and reaches break-even faster.

Why break-even alone is not enough

Knowing you need to sell two hundred units a month to break even is only useful if you have a credible plan to reach that volume. The next question is always: can the market support it? If your product is niche and the realistic total addressable customer count in your geography is fifty per month at current pricing, your business cannot break even at this configuration. Either the price has to rise (which lowers volume requirement), variable cost has to fall (same effect), fixed costs have to drop (smaller hurdle), or the product needs a wider audience.

Common break-even scenarios

A freelancer or solo founder: fixed costs are software and any office overhead, typically a few hundred to a couple thousand dollars per month. Variable cost is near zero for service work. Break-even is whatever your fixed costs are divided by your service rate, which is usually a small number of billable hours.

A small ecommerce business: fixed costs might be $3,000 to $10,000 per month for rent, salaries, software, and ad spend baseline. Variable cost per unit includes COGS, shipping, and processor fees. The break-even unit count is often in the dozens to low hundreds per month for a typical product.

A SaaS startup: fixed costs are dominated by salaries, often $30,000 to $300,000+ per month. Variable cost per customer is very low for software, so the contribution margin is close to the full subscription price. Break-even therefore comes down to customer count, and the relevant question is whether the market can support that many paying customers at the planned price.

A restaurant: fixed costs include rent, manager and chef salaries, insurance, and utilities. Variable costs are ingredients and per-order labor. Break-even is often expressed as a number of covers per day required to clear the day's fixed cost. Restaurants typically break even at 60 to 70 percent of capacity; under that they bleed cash.

How to use the target profit field

Businesses do not aim for break-even. They aim for a profit target that justifies the work and the risk. Setting a non-zero target profit in the calculator finds the volume required to clear fixed costs and produce that profit. This is much more useful as a planning number than pure break-even, because pure break-even is the floor; the target-profit number tells you what success actually looks like.

When the contribution margin is negative

If your variable cost exceeds your price, no volume can save you. Every unit makes the loss bigger. The calculator flags this case. The fixes are either raising the price, lowering the variable cost, or recognizing that this configuration of the business is not viable. Common reasons to land here: aggressive promotional pricing, mispricing during a launch, or vendor cost increases that have not been passed through to the customer.