Break-even point explained: this guide covers what it means, who it applies to, the step-by-step process, documents required, fees, due dates and penalties in India — so you can stay compliant with confidence and avoid costly mistakes.
Before a shop signs a bigger lease or a manufacturer adds a shift, one question decides whether it is sensible: how much must we sell just to cover our costs, and how much more for the profit we want? Break-even analysis answers it with five numbers and a little arithmetic.
Contribution = selling price − variable cost per unit. Break-even point (units) = fixed costs ÷ contribution per unit; in value = fixed costs ÷ profit-volume (PV) ratio, where PV ratio = contribution ÷ sales. Sales for a target profit = (fixed costs + target profit) ÷ contribution per unit. Margin of safety = actual sales − break-even sales. Use it to set sales targets, test price changes and judge how much a fall in sales the business can survive.
Marginal costing in brief
Absorption costing loads each unit with a share of fixed cost. Marginal costing charges units only with variable cost and treats fixed cost as a cost of the period. The difference left after variable cost is the contribution: it first pays fixed costs and then becomes profit. That view is what makes break-even and short-term decisions possible; see cost classification for sorting costs into fixed and variable. A full set of such calculations for your own business forms part of a cost reduction and profitability review.
Data needed
Selling price per unit, variable cost per unit (purchase cost, packing, sales commission, variable power), fixed costs for the period (rent, salaries, depreciation, loan interest), and actual sales. Semi-variable costs must be split first.
The formulas
| Measure | In words | In symbols |
|---|---|---|
| Contribution per unit | Price − variable cost | C = P − V |
| PV ratio | Contribution ÷ sales | C ÷ P (or total contribution ÷ total sales) |
| Break-even units | Fixed cost ÷ contribution per unit | F ÷ C |
| Break-even sales value | Fixed cost ÷ PV ratio | F ÷ (C ÷ P) |
| Sales for target profit | (Fixed cost + target profit) ÷ contribution per unit | (F + T) ÷ C |
| Margin of safety | Actual sales − break-even sales | MoS |
| MoS ratio | Margin of safety ÷ actual sales | |
| Profit | Margin of safety × PV ratio | |
| Cash break-even | (Fixed cost − non-cash fixed cost) ÷ contribution per unit |
Worked example: a retail shop, one line
A shop sells school bags. Monthly figures, all assumed. Selling price ₹800; variable cost ₹560 (purchase 520, packing and commission 40); fixed costs ₹72,000 (rent 30,000, salaries 28,000, other 14,000, of which depreciation is 6,000 within other).
- Contribution = 800 − 560 = ₹240 a bag. PV ratio = 240 ÷ 800 = 30 per cent.
- Break-even units = 72,000 ÷ 240 = 300 bags. In value: 300 × 800 = ₹240,000; check 72,000 ÷ 0.30 = 240,000.
- Target profit ₹36,000: units = (72,000 + 36,000) ÷ 240 = 108,000 ÷ 240 = 450 bags; sales = 450 × 800 = ₹360,000.
- Cash break-even, excluding the 6,000 of depreciation, is (72,000 − 6,000) ÷ 240 = 66,000 ÷ 240 = 275 bags.
Actual sales this month: 400 bags = ₹320,000.
- Margin of safety = 400 − 300 = 100 bags, or 320,000 − 240,000 = ₹80,000, which is 80,000 ÷ 320,000 = 25 per cent of sales.
- Profit = 400 × 240 − 72,000 = 96,000 − 72,000 = ₹24,000; check: 80,000 × 30 per cent = 24,000.
| Sales (bags) | Contribution (₹) | Fixed cost (₹) | Profit or loss (₹) |
|---|---|---|---|
| 200 | 48,000 | 72,000 | (24,000) |
| 300 | 72,000 | 72,000 | 0 |
| 400 | 96,000 | 72,000 | 24,000 |
| 450 | 108,000 | 72,000 | 36,000 |
What the owner decides. At 400 bags a month the shop is 100 bags above break-even. A fall of 25 per cent in sales would wipe out the profit. If the owner wants ₹36,000 a month, the shop must sell 450 bags. A price cut of ₹40 (to ₹760) would drop contribution to ₹200 and raise break-even to 360 bags (72,000 ÷ 200); the cut is worthwhile only if it lifts sales well beyond that.
Break-even with two product lines
The owner adds lunch boxes and a display unit with a part-time salesperson, raising fixed costs to ₹87,000 (assumed). Lunch boxes sell at ₹250 with variable cost ₹150: contribution ₹100, PV ratio 40 per cent. The shop expects to sell two bags for every box (assumed mix).
- One "package" of 2 bags and 1 box: sales = 2 × 800 + 250 = ₹1,850; contribution = 2 × 240 + 100 = ₹580.
- Break-even packages = 87,000 ÷ 580 = 150, that is 300 bags and 150 boxes; sales = 150 × 1,850 = ₹277,500.
- Weighted PV ratio = 580 ÷ 1,850 = 31.35 per cent; check 87,000 ÷ 0.3135 = 277,500 (rounded).
The break-even point holds only for that mix. If boxes sell more, the average contribution rises and break-even falls; if bags dominate, the reverse. Always state the mix assumed.
How to read the result and its limits
Break-even analysis assumes that price and variable cost per unit are constant, that fixed costs stay fixed over the range considered, and that the sales mix is stable. In reality discounts, step-ups in rent and staff, and mix changes bend those lines. Treat the answer as a guide to the order of magnitude, and re-run it when prices or costs change. The analysis also uses the contribution of each product in relevant-cost decisions, and leverage in operating and financial leverage builds on the margin of safety.
Common mistakes
- Putting fixed costs into the variable cost per unit.
- Using break-even units with a changed mix.
- Forgetting commissions and packing, which are variable.
- Using the PV ratio on sales that include a different product mix.
- Treating the break-even as a target rather than a floor.
- Including owner's drawings as fixed cost without deciding whether they are part of the cost base.
Need help with break-even planning?
If you are deciding on a new shop, line or shift, we can help build a break-even and target-profit model with your own cost data in a cost reduction and profitability engagement.
Key takeaways
- Contribution = price − variable cost; PV ratio = contribution ÷ sales.
- Break-even = fixed cost ÷ contribution per unit (or ÷ PV ratio for value).
- Target-profit sales = (fixed cost + profit) ÷ contribution.
- Margin of safety × PV ratio = profit.
- With several products the answer depends on the mix.
Read next
- Make or buy, key factor, special order and shut-down decisions
- Cost classification for a small business
- Operating, financial and combined leverage
Disclaimer: The methods described are standard cost accounting and financial management techniques. The worked example uses an invented business and invented figures, including any tax, interest or exchange rate, which are assumptions for illustration and not current rates. Where the article refers to a legal requirement, the linked guide and the official text should be checked. This article is general information, not legal advice; check the official text before acting.