How to calculate business profit (with a real rupee example)
Most shop owners can tell you their monthly sales to the nearest thousand. Ask for profit and the answer becomes "about this much". This guide gives you the exact method — the formulas, a worked example in rupees, and the mistakes that make the number unreliable. Your profit and loss report can produce this automatically, but you should know what it is doing.
The formula, in plain words
Two profit numbers exist because they answer two different questions. Gross profit tells you whether your pricing works — are you selling items for more than they cost? Net profit tells you whether the business works — after the shop pays for its own existence, is anything left?
The most common mistake is stopping at sales minus purchases and calling it profit. That ignores two things: you did not sell everything you bought, and the shop itself costs money to run.
Step 1 — Get the real sales figure
Total sales means every sale made in the period, in every payment method: cash, card, wallets, bank transfer — and udhaar. A credit sale is still a sale; the revenue counts now even though the cash arrives later. What does not count: supplier deposits, loans you took, or money moved between your own accounts. Those are cash movements, not sales.
Subtract returns and cancelled bills from the total. A shop that sold Rs 800,000 and refunded Rs 25,000 has real sales of Rs 775,000.
Step 2 — Cost only what actually sold
This is where most manual calculations go wrong. Cost of goods sold (COGS) is the cost of the items that left the shelves — not the total you paid suppliers this month. If you bought Rs 500,000 of stock but sold items costing Rs 470,000, your COGS is Rs 470,000. The extra Rs 30,000 is stock on the shelf — an asset, not an expense.
Working it out properly: opening stock value + purchases − closing stock value = COGS. This is also why stock records matter to profit — a wrong stock count produces a wrong profit, which is how inventory affects profit in the most literal sense.
Step 3 — Subtract every expense, not the memorable ones
Operating expenses are everything the shop pays to exist: rent, salaries and commissions, electricity and gas, internet, packaging, delivery and courier fees, card and wallet charges, marketing, repairs, licences — and the small daily ones that vanish from memory: chai, parking, the odd hardware item. A rupee spent on the business is a rupee off profit whether or not it felt important.
Two things owners routinely forget: their own drawings are not an expense (they come out of profit, not before it), and one-off costs like a fridge repair still count — they just count once.
The worked example
A Lahore garments shop, one month:
- Total sales (all methods, after returns): Rs 775,000
- Cost of items sold: Rs 505,000
- Gross profit: Rs 270,000 — a 35% gross margin
- Expenses: rent Rs 60,000, two staff Rs 90,000, utilities Rs 18,000, packaging/delivery Rs 12,000, wallet/card charges Rs 6,000, sundries Rs 9,000 — total Rs 195,000
- Net profit: Rs 75,000 — a 9.7% net margin
Both numbers are useful. The 35% gross margin says pricing is healthy. The 9.7% net says the shop's running costs eat two-thirds of it — and that rent plus staff is the place to watch if profit needs to grow.
What to do with the number once you have it
A single month's profit is a fact; several months are a signal. Track net margin (net profit ÷ sales) monthly. If sales are growing but the margin keeps shrinking, costs are growing faster — the exact trap in why sales grow but profit doesn't.
And once profit is trustworthy, the next questions become answerable: which products carry it, which branch earns it, which month earns it. For the difference between the two profit layers in more depth, see gross vs net profit; to read the full statement this number lives on, see how to read a P&L.
Frequently asked questions
What is the formula for business profit?
Net profit = total sales − cost of goods sold − all operating expenses. Stopping at sales minus purchases gives you gross profit and hides rent, salaries and everything else.
How do I calculate profit for my shop?
Monthly sales minus the cost of the items that actually sold, minus rent, salaries, utilities and all other expenses. The remainder is net profit — the number that says whether the business works.
Is my cash balance the same as profit?
No. Cash is what you can spend today; profit is what the business earned. Credit sales and stock purchases push the two apart — see cash vs profit for the full picture.