What is the Break Even Calculator?
The break-even point is the sales volume at which total revenue exactly covers total cost — the moment a business stops losing money without yet making any. It is the single most useful number for anyone pricing a product or planning a launch.
This calculator finds it from fixed costs, selling price and variable cost per unit, and shows the revenue that volume represents.
What each input means
- Fixed costs
- Costs that do not change with volume — rent, salaries, insurance, subscriptions. Use the same period throughout, usually monthly or annual.
- Selling price per unit
- What a customer actually pays, after any routine discount.
- Variable cost per unit
- Costs incurred per unit sold — materials, packaging, shipping, payment fees, direct labour.
How this calculation works
Subtracting variable cost from selling price gives contribution per unit: the amount each sale contributes toward fixed costs. Dividing fixed costs by that contribution gives the number of units needed to cover them entirely.
The relationship is more sensitive to contribution than to fixed costs. A small price increase or a small reduction in unit cost moves the break-even point disproportionately, because it changes the denominator rather than the numerator.
Formula: Result = the relevant inputs combined using the displayed assumptions.
Getting the most out of the result
- Keep the period consistent. Monthly fixed costs give a monthly break-even volume.
- Include every variable cost, especially payment processing and shipping, which are routinely forgotten.
- Test the effect of a modest price rise. Its leverage on break-even usually surprises people.
- Recalculate whenever costs change. A supplier increase moves the point immediately.
- Treat break-even as a floor, not a target. A business needs to clear it comfortably to be viable.
Common mistakes to avoid
The most frequent modelling error is classifying costs wrongly — treating a variable cost as fixed or vice versa — which distorts the result substantially. Payment processing fees, shipping and returns are commonly omitted from variable cost entirely. Owners also calculate on list price while routinely discounting, so real contribution is lower than modelled. And break-even is often mistaken for a goal when it merely marks the point where losses stop.
Frequently asked questions
What is contribution margin?
Selling price minus variable cost per unit — the amount each sale contributes toward covering fixed costs and, once those are covered, toward profit. It is the engine of the entire calculation.
How do I classify a cost as fixed or variable?
Ask whether it changes when you sell one more unit. Rent does not, so it is fixed. Materials do, so they are variable. Some costs are genuinely mixed — a phone plan with usage charges — and are best split into their components.
What if I sell multiple products?
Calculate using a weighted average contribution based on your actual sales mix, or work through the highest-volume product separately. A single blended figure becomes unreliable if the mix shifts.
Does break-even include my own salary?
It should, if you need to draw one. Owner compensation left out of fixed costs produces a break-even point that looks achievable while the business cannot actually support you.
Why does a small price increase help so much?
Because it increases contribution per unit, which is the denominator. Raising price by a modest amount when contribution is thin can cut required volume sharply — provided demand holds.
What is the margin of safety?
The gap between actual sales and break-even sales, usually expressed as a percentage. It measures how far sales could fall before you start losing money, which is a more useful risk indicator than break-even alone.
Should I calculate in units or revenue?
Units suit a business with a clear product; revenue suits services or varied product lines. This calculator gives both, so use whichever matches how you actually think about sales.