“We sold so much this month, so why is there no money left?” If that sounds familiar, chances are you’re looking only at gross profit and forgetting net profit. This article explains the difference between gross profit and net profit in plain terms, with a real example small shops get wrong all the time.
What is gross profit?
Gross profit is what’s left after subtracting only the cost of the goods from your sales — nothing else yet.
Gross profit = sales − cost of goods sold
Example: you sell ฿30,000 of coffee. Beans, milk, and cups cost ฿12,000. Gross profit = 30,000 − 12,000 = ฿18,000
Looks great, right? But hold on…
What is net profit?
Net profit is what’s actually left after subtracting everything — both the cost of goods and the cost of running the shop (rent, electricity, wages, marketing, and so on).
Net profit = gross profit − all other expenses
Continuing the example, say that month you also had:
| Expense | Amount |
|---|---|
| Rent | ฿8,000 |
| Electricity + water | ฿2,500 |
| Staff wages | ฿6,000 |
| Bags / misc supplies | ฿1,000 |
| Total expenses | ฿17,500 |
Net profit = 18,000 − 17,500 = ฿500
See the gap? Gross profit of ฿18,000 looks fantastic, but the real net profit is just ฿500. This is the trap behind shops that are “busy but never rich.”
Gross vs net at a glance
| Gross profit | Net profit | |
|---|---|---|
| What it subtracts | Cost of goods only | Cost of goods + all expenses |
| What it tells you | Are your prices right? | Is the whole shop surviving? |
| The number is | Higher | Lower (the real one) |
| Use it to decide | Pricing / product mix | Survival / hiring / expanding |
Easy way to remember: gross profit tells you if this item is worth it; net profit tells you if the whole shop is worth it.
Why small shops watch only gross profit
Because gross profit is easy — you see it the moment you sell. Other costs (rent, electricity) land as a lump at month end, out of sync with each sale, so they get forgotten. Then the money’s “gone” and you’re not sure where.
The other trap is hidden costs you overlook: bags, ice, trips to buy stock, app fees. Small each time, but together they eat a big chunk of net profit.
Watch your margins too
Beyond the baht amount, look at the percentages so you can compare across months and shops:
- Gross margin = gross profit ÷ sales × 100 → e.g. 18,000 ÷ 30,000 = 60%
- Net margin = net profit ÷ sales × 100 → e.g. 500 ÷ 30,000 = 1.7%
A 60% gross margin sounds excellent, but a 1.7% net margin means expenses are swallowing nearly everything — time to cut costs or lift sales.
Know your real net profit without doing the math
The problem is that subtracting every expense by hand each month is tiring and easy to forget. A tool like Posless helps: log a sale and see gross profit instantly, snap a receipt to let AI read it as cost, and enter your fixed costs (rent/electricity/wages) once so the system deducts them automatically every month → so you see your real net profit, not just a flattering gross number. All inside LINE, no POS hardware.
Want to go deeper on profit math? Read: How to calculate shop profit and How to price products for profit.
Frequently asked questions
Q: Which matters more, gross or net profit? A: Both, for different jobs. Gross profit tells you if your pricing and product mix are right; net profit tells you if the shop actually survives. Watching only one usually leads to mistakes.
Q: Should I count rent for my own property that I don’t actually pay? A: To see true business net profit, yes — include an estimated rent, because that space could earn income if rented out. It gives you a realistic picture of whether the shop is worth it.
Q: One month of negative net profit — is my shop failing? A: Not necessarily. Look at the trend over several months. Some months carry a big one-off cost (stocking up, equipment repairs). But if it’s negative for several months straight, adjust prices or cut costs quickly.
Summary: Gross profit = sales − cost of goods (is the item worth it?) · Net profit = after subtracting every expense (is the shop surviving?). Don’t be fooled by a big gross number — net profit is what tells the truth, and the sustainable way to track it is a tool that deducts your expenses automatically so you see the real figure every day.