Profit Formula Explained with Examples (India)

Introduction

Open any business guide and you will find a handful of formulas about profit. They look simple, yet they confuse many owners because the same sale can show different percentages depending on which formula you use. Getting this right is the first step to pricing well.

This article explains the profit formula and its close relatives, one at a time. You will see when to use each, how they connect, and how they work on real Indian numbers, including GST-inclusive prices and break-even sales.

Background: profit in everyday trade

Profit is the reward for taking risk. A trader buys goods, adds value by storing, packing, or selling them, and earns the difference. In Indian accounts, this idea appears in the trading account and the profit and loss account, which students meet in CBSE and NCERT commerce books.

The trading account shows gross profit. The profit and loss account then takes off indirect expenses to show net profit. Tax guides on ClearTax follow the same structure for business owners who file under presumptive or regular schemes.

The main profit formulas

What you want	Formula
Profit	SP – CP
Loss	CP – SP
Profit percentage	(Profit / CP) x 100
Loss percentage	(Loss / CP) x 100
Profit margin	(Profit / SP) x 100
Markup	(Profit / CP) x 100
Gross profit	Revenue – cost of goods sold
Net profit	Gross profit – operating expenses
Selling price from profit %	CP x (1 + profit %)
Selling price from margin	CP / (1 – margin)
Break-even units	Fixed costs / (SP – variable cost per unit)

Expert insight: Profit percentage and markup use the same formula because both divide by cost. Margin divides by selling price, so it is always smaller than markup for the same sale.

Markup versus margin

This pair causes the most trouble. A shop that adds 50% to the cost price has a markup of 50%, but its margin is only 33.33%. Here is how they line up.

Markup on cost	Margin on selling price
10%	9.09%
20%	16.67%
25%	20.00%
30%	23.08%
50%	33.33%
100%	50.00%

The link is margin = markup / (1 + markup). To go the other way, markup = margin / (1 – margin). If you want to test numbers, try the profit margin calculator.

Worked example 1: profit and loss on a bulk deal

Sanjay in Ludhiana buys 500 school bags at Rs 320 each and spends Rs 5,000 on transport. He sells 450 bags at Rs 420 and clears the remaining 50 at Rs 250.

• Total cost = (500 x 320) + 5,000 = Rs 1,65,000
• Revenue = (450 x 420) + (50 x 250) = 1,89,000 + 12,500 = Rs 2,01,500
• Profit = 2,01,500 – 1,65,000 = Rs 36,500
• Profit % = 36,500 / 1,65,000 x 100 = about 22.12%
• Margin = 36,500 / 2,01,500 x 100 = about 18.11%

Clearing the last 50 bags at a loss of about Rs 80 each (against a cost of about Rs 330) cut his profit by roughly Rs 4,000. It was still better than carrying the stock.

Worked example 2: pulling profit out of a GST-inclusive price

A mixer-grinder sells at Rs 4,720 including 18% GST. The dealer paid Rs 3,500 for it before GST. What is the dealer’s profit?

• Price before GST = 4,720 / 1.18 = Rs 4,000
• GST collected = 4,720 – 4,000 = Rs 720
• Profit = 4,000 – 3,500 = Rs 500
• Profit % = 500 / 3,500 x 100 = about 14.29%
• Margin = 500 / 4,000 x 100 = 12.5%

If the dealer had treated Rs 4,720 as the selling price, the profit would look like Rs 1,220, which is more than double the truth. GST rates are set by the GST Council and listed on the gst.gov.in portal, so always use the current rate for your item.

Worked example 3: break-even point

Farhan runs a small tiffin service in Hyderabad. Each meal sells for Rs 120 and costs Rs 70 in ingredients and packing. His fixed costs are Rs 30,000 a month for rent, a cook, and fuel.

• Contribution per meal = 120 – 70 = Rs 50
• Break-even meals = 30,000 / 50 = 600 meals
• Break-even revenue = 600 x 120 = Rs 72,000

He needs to sell 600 meals, or 20 a day, just to cover costs. Every meal beyond that adds Rs 50 to profit. If he sells 900 meals, his profit is 300 x 50 = Rs 15,000.

Worked example 4: setting a price from a target

Lata makes pickles at home in Nashik and sells 500 g jars. Each jar costs her Rs 140 for ingredients, the jar, and the label. She also wants Rs 20 per jar to cover delivery. That brings the full cost to Rs 160. She wants a 25% margin on the selling price.

• SP = 160 / (1 – 0.25) = 160 / 0.75 = about Rs 213
• Profit per jar = 213 – 160 = Rs 53
• Check: 53 / 213 x 100 = about 24.9%

If she had added a 25% markup instead, she would have charged Rs 200 and earned a margin of only 20%. On 300 jars a month, that choice is a difference of nearly Rs 4,000. She rounds the price to Rs 215 for a clean number, which lifts the margin slightly above target.

A short checklist before you fix any price

• Is the full cost included, with transport, packing, and fees?
• Is the margin or markup clearly named?
• Does the price work after your usual discounts?
• Does GST need to be added on top, and at what rate?

Worked example 5: how a discount cuts profit

Vivek runs an electronics counter in Mumbai. A pair of headphones costs him Rs 800 and sells for Rs 1,000 before GST. That is a profit of Rs 200 and a margin of 20%. For a festival week, he offers a 10% discount.

• New selling price = 1,000 – 100 = Rs 900
• New profit = 900 – 800 = Rs 100
• New margin = 100 / 900 x 100 = about 11.11%

A 10% discount on price cut his profit by 50%, because the whole discount comes out of profit and not out of cost. To earn the same total profit as before, he must now sell twice as many pairs. If he normally sells 40 pairs, he must sell 80 during the offer just to stand still. This simple check tells him whether a sale is worth running.

Benefits of knowing the formulas

When you know which formula fits which question, you stop guessing. You can answer, in a minute, how much profit a deal gives, what price meets a target, and how many units you must sell to avoid loss.

You also communicate better with suppliers, accountants, and banks. If a distributor quotes a 20% margin, you will know it differs from a 20% markup, and you can compare offers fairly. Finally, the formulas help you teach staff and family members to price with confidence, which reduces costly mistakes at the counter.

Challenges and limitations

Formulas work on clean numbers, but real records are messy. Returns, free samples, wastage, and shared costs make it hard to say what one item truly cost. Estimates are often needed.

Break-even maths assumes a fixed selling price and a constant cost per unit, which rarely holds when you offer discounts or buy in different bulk sizes. Treat formula results as a guide that you refine as data improves.

Common mistakes to avoid

1. Dividing by the wrong base. Profit percentage divides by cost, margin divides by selling price. Pick the right one for your question.
2. Using the MRP as selling price. If you sell below MRP, use the real price charged to the customer.
3. Applying GST on the wrong number. Divide by 1 plus the GST rate to remove tax from an inclusive price. Subtracting 18% of the total gives a wrong base.
4. Forgetting free goods and wastage. Spoiled or free items raise the cost of each sold unit.
5. Treating break-even as profit. At break-even you earn nothing. Set a sales target above it.
6. Quoting a margin when you mean markup. This leads to underpricing, especially in negotiations.

Best practices and expert recommendations

1. Name the formula in every report. Write markup or margin beside each percentage so that readers know the base.
2. Convert tax-inclusive prices first. Remove GST before you calculate profit, then compare with cost on the same basis.
3. Update unit costs often. When suppliers raise prices, redo your selling price right away.
4. Know your break-even. Review it every quarter and after any big change in rent or wages.
5. Keep a margin floor. Set the lowest margin you accept per product category and stick to it.
6. Check calculations twice. Run the same case through a calculator to confirm the answer before you print a price list.

Try it yourself

Test any formula from this guide with the free profit calculator on DigiToolkit. Type in your cost and selling prices to see profit, percentage, and margin side by side.

Conclusion

The profit formulas are few and easy once you separate what each one measures. Profit is selling price minus cost. Profit percentage and markup divide by cost, while margin divides by selling price. Gross and net profit show the business at two levels, and break-even tells you the sales you need to survive. Practise with the examples above, watch out for GST traps, and use the formulas every month to keep your business healthy.

FAQs

What is the basic profit formula?
Profit = selling price – cost price. If the result is negative, it is a loss. Percentages are found by dividing the profit or loss by the cost price and multiplying by 100.

How do I convert markup to margin?
Use margin = markup / (1 + markup). A 25% markup gives 0.25 / 1.25 = 20% margin. The reverse is markup = margin / (1 – margin).

How do I find profit from a GST-inclusive price?
First divide the inclusive price by (1 + GST rate) to get the price before tax. Then subtract your cost price. For Rs 4,720 at 18% GST, the base is Rs 4,000.

What is the break-even formula?
Break-even units = fixed costs / (selling price per unit – variable cost per unit). If fixed costs are Rs 30,000 and each unit earns Rs 50 after variable cost, you need 600 units.

Is gross profit the same as net profit?
No. Gross profit is revenue minus the direct cost of goods sold. Net profit is what remains after you also subtract running costs such as rent, wages, and marketing.