Margin, Markup and Break-even: The Three Numbers Every Small Business Needs

Small businesses often fail not because demand is missing but because the pricing arithmetic is wrong. Three numbers cover most of it: margin, markup and break-even.

Margin and markup are not the same

Cost ₹800, selling price ₹1,200. Profit is ₹400.

• Gross margin = profit ÷ selling price = 400 ÷ 1,200 = 33.3%
• Markup = profit ÷ cost = 400 ÷ 800 = 50%

The same ₹400 has two very different percentages depending on the base. A 50% markup is only a 33% margin. Businesses that price on markup and manage on margin eventually discover that healthy-looking sales produced very little profit.

Our margin and markup calculator shows both from cost and selling price.

Pricing to a target margin

If you want a specific margin rather than a specific markup, the formula is simple:

Selling price = Cost ÷ (1 − Target margin)

For a 40% margin on a ₹800 cost: 800 ÷ 0.6 = ₹1,333.33. Adding 40% to cost would give ₹1,120, which is only a 28.6% margin. Working from the margin directly is the only reliable way to hit the number you planned.

Break-even: how many units before you make anything

Break-even answers the question every new business needs: how much do I have to sell before I stop losing money?

• Contribution per unit = selling price − variable cost. This is what each sale adds towards fixed costs and then profit.
• Break-even units = fixed costs ÷ contribution per unit.

With ₹1,00,000 of monthly fixed costs, a ₹500 price and ₹300 of variable cost, contribution is ₹200 per unit. Break-even is 500 units, or ₹2,50,000 of sales. Every unit beyond that adds ₹200 straight to profit. Our break-even calculator does this for your numbers.

Why a price cut is more dangerous than it looks

Cut the price from ₹500 to ₹450 and contribution falls from ₹200 to ₹150. Break-even rises from 500 units to 667 — a third more sales just to stay in the same place. Small price changes move the break-even point sharply, which is why discounting should be tested before it is offered.

What belongs in each bucket

• Variable costs: materials, packaging, delivery, payment gateway fees, marketplace commission.
• Fixed costs: rent, salaries, subscriptions, insurance, your own drawings.
• Not revenue: GST or sales tax collected on behalf of the government.

Two mistakes are common. Leaving the owner's salary out of fixed costs produces a break-even that looks achievable and is not. And treating apportioned rent as a variable cost distorts the contribution figure, which is the number that decides everything.

A simple review habit

Once a quarter, list your best-selling products with four numbers: cost, selling price, gross margin and contribution. Then compare with actual sales volume against break-even. It takes an hour and answers the questions that matter — what to push, what to reprice and what to stop selling.