How to Calculate Your Shop's Real Daily Profit

3 September 2026 · LenDen Team · 6 min read

Your day-end cash is not your profit. Profit is sales — including the ones on udhaar — minus what those goods cost you, minus the day's share of your fixed costs. Cash is just what happens to be in the drawer, which includes money owed to suppliers and excludes money owed to you.

Collect four numbers daily. Turn them into a profit figure monthly. That is the whole method.

The four numbers to collect daily

Five minutes at close. A notebook page or a note on your phone is enough.

1. Total sales. Everything sold today, cash and credit together.

2. Of which, credit. How much went out on udhaar. Your khata already has this if you enter at the counter — how to keep a digital udhar khata covers making that reliable.

3. Purchases paid today. What you paid suppliers, whether for stock arriving now or later.

4. Cash counted. The actual physical count, plus today's UPI receipts.

That is it. No categorising, no arithmetic yet. Four numbers, ninety seconds once you are used to it.

The daily check worth doing

Before you close the book, one comparison:

Opening cash + cash sales + udhaar recovered − purchases paid − expenses paid = what the drawer should hold

Compare that to the count. A gap of a few rupees is rounding. A gap of ₹200 is something specific — a missed entry, change given wrong, a sale not recorded, or a withdrawal not noted.

Investigate it the same evening. Tomorrow nobody remembers, and a habit of unexplained gaps is how a shop stops being able to trust its own numbers. This single check is the cheapest control you have, and it takes a minute.

Turning the daily numbers into profit

Monthly, thirty minutes. Three steps.

Step 1: Total your sales

Add up the month's sales, cash and credit together. Credit sales count — you earned that margin when the goods left the shop. Whether the money has arrived is a cash question, dealt with in why you're profitable but have no cash.

Step 2: Work out the cost of what you sold

The bit people get stuck on, so use the shortcut: cost ratios by category.

Split your sales into five or six rough groups and know each one's cost ratio. Something like:

Gross profit: ₹2,00,000 − ₹1,70,600 = ₹29,400.

This is an estimate and that is fine. A consistent approximation you actually calculate every month beats an exact figure you compute once and abandon. Work the ratios out once from your purchase invoices, then reuse them until your prices or supplier costs change.

Notice how much the ratios differ — 92% on staples versus 75% on toiletries. That spread is why a single blended margin misleads, and it is worth knowing which categories carry the shop. The arithmetic of margin versus markup is in markup vs margin.

Step 3: Subtract your fixed costs

Rent, electricity, wages, transport, packaging, phone, repairs. Add them up for the month.

Say ₹22,000. Then:

Net profit = ₹29,400 − ₹22,000 = ₹7,400.

That is the real number. And notice what it reveals — on ₹2,00,000 of sales, this shop earns ₹7,400, a net margin under 4%. Which means a single ₹5,000 bad debt wipes out most of a month.

That realisation is the entire reason to do this calculation. Shopkeepers who have never worked it out consistently overestimate how much a lost balance costs them in sales terms — recovering ₹5,000 of lost margin here takes over ₹1,30,000 of additional trading.

Fixed costs per day, if you want a daily view

Divide monthly fixed costs by trading days. ₹22,000 over 28 days is about ₹790 a day.

That number is genuinely useful at the counter: it is what the shop must earn in gross profit before you have made anything. On a 15% average gross margin, ₹790 of costs means roughly ₹5,300 of sales just to break even.

Knowing your break-even sales figure changes how a slow day feels. It stops being a vague worry and becomes a number you either cleared or did not.

What people commonly get wrong

Counting purchases as the cost of sales. What you paid suppliers this month is not what the goods you sold cost — some of what you bought is still on the shelf, and some of what you sold was bought last month. Use cost ratios on sales, not purchase totals.

Forgetting their own labour. If you have not paid yourself, the profit figure flatters the shop. Include a realistic amount for your own time — see separating shop money from personal money.

Ignoring small recurring costs. ₹200 a day of transport is ₹6,000 a month. These are consistently underestimated and they come straight off net profit.

Treating a bad debt as a small loss. At a 4% net margin, a ₹5,000 write-off is not a ₹5,000 problem — it is most of a month.

The routine

• Daily, five minutes: four numbers, plus the cash check.
• Monthly, thirty minutes: the three steps above, and compare to last month.
• Once a year: revisit your cost ratios, because supplier prices move and margins quietly erode.

The monthly comparison is what turns record-keeping into management. Records tell you what happened; comparing months tells you what is changing — and that is the only thing you can act on. The wider system sits in small shop bookkeeping: a practical guide.