Break-Even Point Calculator

The break-even point is the volume at which total revenue equals total cost. Below it you lose money, above it you make money, and the calculation that finds it is one of the few in business that is both simple and genuinely decision-changing.

Fixed, variable, and why the split matters

Fixed costs do not change with volume: rent, salaries, insurance, software subscriptions, depreciation. You pay them whether you sell one unit or ten thousand.

Variable costs occur per unit: materials, packaging, per-unit labour, payment gateway fees, delivery.

The distinction is what the whole calculation rests on, and it is often less clean than it looks. Electricity is partly fixed and partly variable. A salesperson on a base plus commission is both. Where a cost is genuinely mixed, split it — the fixed portion into fixed, the per-unit portion into variable — rather than forcing it into one bucket.

The formula

contribution per unit = price − variable cost

break-even units = fixed costs ÷ contribution per unit

Contribution is what each sale contributes towards the fixed costs. Once enough units have been sold to cover them entirely, every further unit's contribution is profit.

Note that you divide by contribution, not price. Dividing fixed costs by price is a common error and always understates the break-even point, sometimes badly.

A worked example

Fixed costs ₹4,00,000 a month. Price ₹500. Variable cost ₹300.

contribution = 500 − 300 = ₹200

break-even = 4,00,000 ÷ 200 = 2,000 units

break-even revenue = 2,000 × 500 = ₹10,00,000

The contribution margin is 200 ÷ 500 = 40%, so 40 paise of every rupee of revenue goes towards fixed costs and then to profit.

At 2,500 units the profit is 500 × 200 = ₹1,00,000. At 1,500 units the loss is ₹1,00,000. Beyond break-even, profit moves by the contribution per unit, which is why a business just past break-even becomes profitable very quickly and one just below it bleeds at the same rate.

Price cuts move it more than you expect

A 10% price cut, from ₹500 to ₹450, leaves variable cost unchanged at ₹300.

contribution = ₹150

break-even = 4,00,000 ÷ 150 = 2,667 units

A tenth off the price requires a third more sales simply to stand still. The reason is that the discount comes entirely out of contribution, and contribution was 40% of the price — so a 10% price cut is a 25% cut in contribution.

The reverse is equally strong. Raising the price to ₹550 lifts contribution to ₹250 and drops break-even to 1,600 units, a 20% reduction in the volume you need.

This asymmetry is why discounting is more dangerous than it feels and why a modest price rise is the most powerful lever most small businesses have.

Which lever to pull

Three ways to lower the break-even point, in descending order of effect.

Raise the price. Every rupee goes straight to contribution. The risk is volume, and the table above shows how much volume you can afford to lose.

Cut variable cost. A ₹20 saving per unit has exactly the same effect as a ₹20 price rise on contribution, and no effect on demand. Better supplier terms, less wastage and cheaper packaging all work here.

Cut fixed costs. Direct and often the hardest, since rent and salaries are committed. Where it can be done — moving a fixed cost to a variable one, such as replacing a salaried role with a per-unit contractor — it lowers break-even and reduces risk at the same time.

Margin of safety

The break-even point on its own is less useful than the gap between it and your actual sales.

margin of safety = (actual sales − break-even sales) ÷ actual sales

At 2,500 units against a break-even of 2,000, the margin of safety is 20% — sales can fall by a fifth before losses start. At 2,100 units it is 4.8%, which is a business one bad month from trouble.

This is the figure to track rather than the break-even point itself, because it changes as sales change and it measures fragility directly.

What break-even ignores

Timing of cash. Break-even is an accounting statement about a period. If customers pay in 60 days and suppliers in 30, a business can pass break-even and still be unable to make payroll. Break-even is not a cash-flow forecast and should never be used as one.

Capacity steps. The model assumes fixed costs stay fixed at every volume. In reality they jump: a second shift, a larger unit, another delivery vehicle. Each step creates a new and higher break-even point, and the volume just after a step is the most dangerous place a growing business sits.

Mixed products. With several products at different margins, there is no single break-even quantity. Compute it in revenue terms using the weighted average contribution margin across the actual sales mix — and remember that the answer changes whenever the mix does, without anything else changing.

Demand. The calculation tells you what you must sell, never whether anyone will buy it. A break-even of 2,000 units in a market of 1,500 is a complete answer, and it says the business does not work.

When there is no break-even at all

If the price is at or below the variable cost, contribution is zero or negative and no volume produces a profit. Every additional sale increases the loss.

The calculator reports this rather than returning an enormous number, because it is a different situation from a high break-even point: it cannot be fixed by selling more. Only a price rise or a cost reduction changes it.

This is worth checking explicitly for any product sold at a promotional price, any loss-leader, and any marketplace listing where commissions and delivery are deducted from the price after the fact — those deductions are variable costs, and they have taken products below contribution more than once.

Break-even in time, not just units

Converting the unit answer into a date is what makes it usable for planning.

At a break-even of 2,000 units a month and current sales of 1,200 growing 8% a month, it takes about seven months to reach it — and the cumulative losses across those months are the money the business must have in hand before it starts.

That cumulative figure is usually larger than anyone expects. Losing an average of ₹60,000 a month for seven months is ₹4,20,000 of funding required purely to reach the point where the business stops losing money, before any of the original investment is recovered.

Two related dates are worth computing at the same time. Cash break-even — when receipts exceed payments — arrives later than accounting break-even wherever customers pay on credit. And payback, when cumulative profit has repaid the original investment, arrives later still.

Only the third one means the venture has worked.

Service businesses and capacity

For a business selling time rather than units, the same arithmetic applies with billable hours as the unit.

A consultant with ₹80,000 of monthly fixed costs billing ₹2,000 an hour, with variable costs near zero, breaks even at 40 billable hours a month. That sounds easy until utilisation is considered: the hours spent selling, invoicing and administering are not billable, and a realistic utilisation rate is 50% to 60%. Forty billable hours therefore needs roughly seventy worked ones.

This is why service pricing has to be set against billable capacity rather than available capacity, and why a rate that looks generous against a salary frequently is not. Dividing a target annual income by 2,000 hours produces a rate that cannot work; dividing by 1,000 is closer.

What this calculator assumes

• Fixed costs are constant across the whole volume range, which holds only until a capacity step.
• Variable cost per unit is constant, so no bulk purchasing discounts are modelled.
• One product at one price. For a mixed range, use the weighted average contribution margin.
• Everything produced is sold, with no inventory build-up.
• Figures are before tax, and the calculation is about profit rather than cash.