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Break-Even Calculator
Calculate break-even units and revenue, contribution margin, target-profit sales, and margin of safety for a product or service.
Cost and price inputs
Interpret your break-even estimate
The break-even point is the number of units or amount of revenue needed to cover fixed and variable costs before profit begins.
Inputs that matter most
- Fixed costs: costs that stay mostly unchanged over the period, such as rent, salaries, insurance, and software.
- Selling price: the average revenue earned per unit sold.
- Variable cost: the cost that rises with each unit sold, such as materials, fulfillment, transaction fees, or direct labor.
- Projected unit sales: your expected sales volume for checking profit and margin of safety.
Common mistakes
- Using total costs as fixed costs and also entering per-unit costs.
- Forgetting payment processing, packaging, commissions, or fulfillment costs in variable cost.
- Comparing break-even units without checking whether the sales volume is realistic.
- Assuming all units sell at the same price when discounts or bundles are common.
When this estimate can be misleading
This calculator uses a simple single-product model with constant price and variable cost. It does not model inventory timing, taxes, financing, changing costs at scale, refunds, or multi-product sales mix.
Scenarios to try
- Test a higher price to see whether break-even units fall enough to offset lower demand.
- Raise variable cost to include fees or fulfillment costs you may have missed.
- Increase fixed costs before hiring, leasing space, or adding software.
- Set target profit to the monthly profit you want the offer to produce.
Next-step utilities
How to use this break-even calculator
Use this before launching a product, changing prices, adding fixed costs, or setting a sales target.
- Enter fixed costs for the period you care about, such as a month or a launch budget.
- Enter the average selling price and variable cost per unit.
- Add a target profit if you want to see the sales volume needed beyond break-even.
- Enter projected unit sales to estimate profit and the cushion above or below break-even.
Break-Even Calculator features
- Calculate break-even units from fixed costs, selling price, and variable cost per unit.
- Calculate break-even revenue for the period or launch budget you enter.
- Add a target profit to see the unit volume needed beyond break-even.
- Enter projected unit sales to estimate expected profit or loss.
- Review contribution margin per unit and contribution margin ratio.
- See how far projected sales are above or below break-even.
- Use the scenario table to compare sales levels around the break-even point.
What break-even means
Break-even analysis shows the sales level where total revenue equals total cost.
Every unit sold contributes its price minus variable cost toward fixed costs. Once those fixed costs are covered, additional contribution margin becomes operating profit in this simplified model.
Margin of safety compares projected unit sales with break-even units. A positive margin means projected sales are above break-even; a negative margin means the plan is still short of covering costs.
Break-even formulas
The calculator uses standard contribution margin formulas for a single product or service.
CM = P - VC
P is selling price per unit, and VC is variable cost per unit.
BEU = \frac{FC}{CM}
FC is fixed costs for the selected period. The result is rounded up because partial units usually cannot cover the final dollar of cost.
\pi = (Q \cdot CM) - FC
Q is projected unit sales, and pi is projected profit before taxes, financing, and other items not entered here.
Break-even calculator FAQ
Should fixed costs be monthly or annual?
Use the same period for fixed costs, target profit, and projected sales. Monthly fixed costs should be paired with monthly projected sales.
What counts as variable cost?
Variable cost includes costs tied to each sale, such as materials, packaging, fulfillment, transaction fees, commissions, direct labor, or cost of goods sold.
Why does the calculator round break-even units up?
If the exact break-even result is 133.2 units, selling 133 units would still be slightly short, so the calculator shows 134 units.
What is contribution margin?
Contribution margin is selling price minus variable cost per unit. It shows how much each sale contributes toward fixed costs and profit.
What is contribution margin ratio?
Contribution margin ratio is contribution margin divided by selling price. It shows the percentage of each sales dollar available to cover fixed costs and profit.
What does target profit sales mean?
Target profit sales is the number of units needed to cover fixed costs and reach the profit goal entered in the calculator.
What is projected profit?
Projected profit estimates profit or loss at the projected unit sales entered above, before taxes, financing, and costs not included in the calculator.
What is margin of safety?
Margin of safety compares projected sales with break-even sales. A positive margin means projected sales are above break-even; a negative margin means the plan is below break-even.
Use break-even as a model of one operating range
Break-even assumes the entered selling price, variable cost per unit, and fixed cost describe the same period and product mix. It also assumes each additional unit has the same contribution margin within the range studied. Volume discounts, overtime, spoilage, capacity steps, or a changing mix can make the relationship nonlinear.
Classify costs by how they behave for this decision, not by a permanent label. Rent may be fixed for the current location but step up when capacity requires another site. Shipping can have a per-order charge and a variable weight component. Split mixed costs when the distinction is large enough to change the result.
Use net selling price after normal discounts, refunds, credits, and channel fees when those amounts reduce what the business keeps. Use variable cost for the resources consumed by one more unit, order, or customer. Keep sales tax outside revenue when it is collected for a tax authority rather than earned.
For several products, a single break-even unit count needs a stable sales mix. Calculate a weighted average contribution margin only when the expected mix is defensible, then test what happens if customers shift toward lower-margin products. Otherwise, model products separately and include shared fixed costs deliberately.
Capacity matters. A target above the staff, equipment, inventory, or market capacity is not an actionable break-even plan. Add the fixed and variable costs required to reach the next capacity level, then recalculate. Also check cash timing because a profitable sale can still create a shortage when inventory and labor are paid before customers pay.
Treat margin of safety as breathing room, not a guarantee. Demand, price, defects, returns, and supplier costs can move together. Run a downside case with lower volume and price plus higher cost. If a modest change removes the margin, gather better estimates or reduce fixed commitments before relying on the target.
Decision checklist
- Use one period, currency, product mix, realized selling price, and cost definition across every input.
- Separate fixed, variable, and step costs for the operating range and include the capacity needed to reach the target.
- Test lower price and volume with higher variable costs, returns, and fixed commitments rather than relying on one central case.
- Confirm the target fits demand, staffing, equipment, inventory, supplier, and cash-flow constraints.
- Reconcile modeled contribution with recent actual orders and update assumptions when mix or costs change.
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Calculate break-even units and revenue, test contribution margin assumptions, and add a margin of safety before using the result for a real business decision.