I sold bookmarks out of my school bag for a term, and pricing almost broke me
A ₹6 cost, a ₹10 price tag, and the day I realised my own time was also a cost.
Dev Agarwal12th Sample
7 Sept 2026 · 5 min read

Photo: Minh Nguyen · CC BY-SA 4.0 · via Wikimedia Commons
Everyone in my family does business. My dad has a shop, my uncles have shops, even my grandmother keeps a mental ledger of who owes her a favour. So when I was in class 9 and decided I wanted to "start something", nobody was surprised. They were only surprised by how small it was.
It was bookmarks. Handmade ones. My cousin was good at drawing little patterns, I was good at talking to people, and between us we figured we could make something that every second kid in school loses anyway. We bought a pack of thick paper, a roll of cheap thread for tassels, a bottle of glue, and I borrowed my dad's lamination pouches from the shop (more on that later, because it matters).
The first week was pure joy. We made twenty bookmarks on a Sunday, I carried them in a zip pouch inside my school bag, and by Thursday I had sold sixteen. Ten rupees each. I felt like a tycoon. I walked around the canteen counting coins like a villain in a cartoon.
The first mistake: I didn't know my cost
I told everyone my cost was "basically nothing, just paper". That was a lie I was telling myself. At the end of the month my cousin made me sit down and actually add things up. Per bookmark, it came to roughly this:
| Item | Cost per bookmark |
|---|---|
| Paper | ₹2 |
| Thread and glue | ₹1.5 |
| Marker and ink wear | ₹1 |
| Packaging (tiny plastic sleeve) | ₹1.5 |
| Total | ₹6 |
So at ₹10, I was making ₹4 on each piece. Not "basically everything", ₹4. On 40 pieces that is ₹160 for the week, not the ₹400 I had in my head. The ₹400 was revenue. The ₹160 was profit. I had been mixing up the two for weeks, and I think a lot of people do this forever.
The second mistake: my time was free in my head
That Sunday afternoon of cutting, drawing and gluing took about six hours between the two of us. ₹160 for six hours of work is about ₹26 an hour, split two ways, which is basically nothing. If I had gone and helped my dad at the shop for six hours he would have paid me more, and I would have learned the same thing about customers.
Nobody tells you this when you are fifteen: time is a cost even when no one sends you a bill. If a business only works when you ignore your own time, it is a hobby. A hobby is fine! Mine just was not the thing I thought it was.
The experiment
Here is where my family's dinner-table brain kicked in. My dad said, "Don't ask what the customer will pay. Ask what the customer cannot say no to." Annoying advice, but it pushed me to try something.
I made a smaller batch of a different product: laminated bookmarks with something useful printed on the back. A mini periodic table on one side, a small multiplication and squares chart on the other. Same paper, plus a laminating pouch (₹1) and printing at home (₹0.5, roughly). So the cost went up from ₹6 to about ₹7.5, call it ₹7 for simple maths.
I priced them at ₹15. Everyone told me nobody would pay that for a bookmark. And they were right about the plain ones: if I had tried ₹15 on the plain paper bookmarks, I would have sold far fewer. But the laminated ones were a different thing in people's heads. They were not a bookmark, they were a tiny study tool that also survives a water bottle leak.
In the first week I sold 28 laminated ones. Profit per piece was ₹15 minus ₹7, so ₹8. Twenty-eight times eight is ₹224. More money, from fewer pieces, with almost the same making time, because laminating is faster than hand-drawing.
Same effort, different story about what it is, different price. That was the whole lesson. The price is not the cost plus a bit. The price is what the customer believes they are getting.
What I got wrong after that
I got greedy. I tried ₹25 for a "limited edition" with a gold-ink border. It sat in my pouch for two weeks. Nobody wanted it. Some of the same classmates who happily paid ₹15 looked at ₹25 and just said "bro, bookmark hai".
So price has a ceiling, and the only way to find it is to test, politely and in small batches. I started noting down every sale in a tiny notebook: what, when, how much, who. That notebook taught me more than the sales did. I could see that Monday and Tuesday sold best (people had just come back from the weekend, new chapter, new motivation), and that nothing sold during test week because nobody wants a bookmark when they are scared of a test.
Things I'd tell my class 9 self
- Write down your real cost per piece before you tell anyone your price.
- Revenue is not profit. Say it out loud until it is boring.
- Count your time at least at some pretend hourly rate.
- Test one price change at a time, otherwise you cannot tell what worked.
- Do not borrow your dad's lamination pouches without noting them down as a cost. He noticed. We had a talk.
Did I become rich? No. Over the whole term I made a little over ₹1,000 in profit, bought an actual decent geometry box and a secondhand calculator for my cousin, and gave the rest to my cousin because she did most of the drawing. We stopped when class 10 got serious.
But I still think about those ₹4 and ₹8 margins whenever someone says "I'll just start a business, how hard can it be?" It is not hard to start. It is hard to know whether you are actually earning anything.
If you have run a tiny stall, a notes-printing thing, a tuition-circle, anything, tell me how you priced it. I want to hear where you messed up.
12 responses
Sign in to join the conversation.
[+][–]Rohan Sharma11thSample· 1mo ago
ngl the "bro, bookmark hai" line killed me 😭 but also the revenue vs profit thing... I think I have been doing that with my meme page ads in my head
[+][–]Dev Agarwal12thSample· 1mo agoAuthor
meme page ads?? explain, bhai. do you actually get money or is it vibes
[+][–]Rohan Sharma11thSample· 1mo ago
vibes. 0 money. 400 followers. but in my head I'm a media company 😂
[+][–]Kabir Joshi11thSample· 1mo ago
The laminated version is a great example of the same cost, different perceived value. I'd add one thing: your ₹15 price worked partly because you tested it on people who already knew you. A stranger seeing a ₹15 bookmark has no reason to trust it's useful. Might be worth saying that in the post, since it's easy to copy the number and miss the context.
[+][–]Dev Agarwal12thSample· 1mo agoAuthor
fair point. yes, I knew almost every buyer. a stranger would have asked for proof. I sold the first few by just showing them the periodic table side and letting them flip it.
[+][–]Tanvi Deshmukh12thSample· 1mo ago
the notebook!!! tracking every sale is so me 😍 I do the same for my bullet journal, I even colour-code the days. did you ever make a chart of Monday vs Friday sales? that would be an amazing page
[+][–]Dev Agarwal12thSample· 1mo agoAuthor
I did a bar chart, very ugly, with colour pencils. Monday was the tallest. Friday was almost invisible lol
[+][–]Farhan ShaikhDropperSample· 1mo ago
This is the exact reason I tell people to separate "cash in hand" from "profit". I once sold notes photocopies in my coaching and thought I was doing great because my pocket was full. Then I remembered the photocopy shop wanted its money at the end of the week. Profit was a lot smaller 😅
Also the time cost thing is real. Good that you saw it at 15.
[+][–]Harsh Gupta12thSample· 1mo ago
dev bhai you started a business, learned margins, and also got scolded for dad's lamination pouches. that's a complete founder arc 🏆
[+][–]Neel Chatterjee12thSample· 1mo ago
Question: when the ₹25 one didn't sell, did you try dropping it to ₹18 or just stop? Curious whether there's a price between 15 and 25 where it works. (Chess brain, I want to see the whole tree.)
[+][–]Dev Agarwal12thSample· 1mo agoAuthor
I didn't try 18. By then I'd lost interest and exams were coming. Honestly it would have been the next experiment. Maybe ₹18 to 20 would have worked, I just don't know.
[+][–]Meera Patel11thSample· 1mo ago
Appreciated that you gave the actual table. I think a lot of "I started a business" posts hide the numbers and only say "it taught me so much". The numbers are the interesting bit.



