Why this matters
The break-even point is the moment a business stops losing money and starts covering its costs. Every unit sold below that threshold represents a loss, and every unit above it contributes to profit. For new product launches, pricing decisions, and pitch decks, the break-even analysis is one of the most frequently requested financial metrics by investors, lenders, and internal stakeholders.
The calculation itself is simple: divide fixed costs by the contribution margin, which is the selling price per unit minus the variable cost per unit. That gives you the number of units you need to sell. Multiply that by the price and you get the break-even revenue. Despite the simplicity, many founders skip this step entirely and discover too late that their pricing model cannot support their overhead.
This calculator makes the process instant and visual. You enter three numbers and immediately see the break-even units, the break-even revenue, and the contribution margin per unit. For service businesses, the same logic applies by treating a billable hour or project as a unit and the per-delivery cost as the variable expense.
Reference table
| Input | Description |
|---|---|
| Fixed costs | Ongoing expenses that do not change with volume: rent, salaries, insurance |
| Price per unit | What you charge the customer for one unit |
| Variable cost per unit | Cost to produce or deliver one unit: materials, shipping, hourly labor |
| Contribution margin | Price minus variable cost; what each sale contributes toward fixed costs |
| Break-even units | Fixed costs divided by contribution margin |
| Break-even revenue | Break-even units multiplied by price per unit |
How to use it
Enter your total fixed costs, such as monthly rent, salaries, insurance, and software subscriptions.
Enter the price per unit that you charge customers for your product or service.
Enter the variable cost per unit, including materials, direct labor, packaging, and shipping.
Review the calculated break-even units, break-even revenue, and contribution margin.
Testing your result
Verify the calculation by multiplying the break-even units by the contribution margin. The result should equal your fixed costs exactly. Then multiply the break-even units by the price per unit and confirm it matches the displayed break-even revenue. For a sanity check, try entering numbers where the variable cost equals the price. The contribution margin should drop to zero and the break-even point should indicate that no break-even exists, which is the correct behavior for a business that loses money on every sale.
Common mistakes
Forgetting to include all fixed costs, particularly depreciation, which is a non-cash expense but reduces profit.
Misclassifying semi-variable costs like utilities that rise with production volume.
Entering total revenue instead of price per unit, which produces wildly incorrect results.
Ignoring the scenario where variable cost exceeds price, meaning no break-even point exists.
Edge cases and options
When variable cost exceeds price, the contribution margin is negative and there is no break-even point. The business loses money on every unit sold, so the only path forward is to reduce variable costs or raise the price. For service businesses, the concept maps directly: a unit is a billable hour, the price is your hourly rate, and the variable cost is any per-hour expense like contractor fees or materials. Subscription businesses can treat a unit as one monthly subscriber, with variable cost being the per-subscriber cost of hosting, support, and payment processing fees.
Real-world use cases
A bakery owner calculating how many loaves of bread must be sold per month to cover rent, ingredients, and staffing.
A SaaS founder determining the number of paid subscribers needed to reach profitability.
A freelance consultant figuring out how many billable hours per month are required to cover software, office space, and insurance.
A manufacturer evaluating whether a new product line can break even within its first year based on projected unit sales.
Frequently asked questions
Q: What is contribution margin?
A: Contribution margin is the price per unit minus the variable cost per unit. It represents the amount each sale contributes toward covering fixed costs. Once fixed costs are fully covered, the contribution margin becomes profit.
Q: What if variable cost exceeds price?
A: There is no break-even point because you lose money on every sale. You would need to lower variable costs or raise the price to make the business viable.
Q: Does this work for service businesses?
A: Yes. Treat units as billable hours or projects. Variable cost would be your per-hour delivery cost, including contractor fees and materials.
Q: Should I include depreciation in fixed costs?
A: Yes. Depreciation is a non-cash expense but it reduces profit, so including it gives you a true break-even picture.
Start using it now
Try the Break-Even Calculator tool. See also Profit Margin Calculator, Markup Calculator, and ROI Calculator.
