Profit vs Revenue: How to Explain It to a 9-Year-Old

Revenue is all the money you collect from selling stuff. Profit is what's left over after you pay for everything it took to make that stuff.

Think of it like this. If you sell 10 cups of lemonade for $1 each, you made $10 in revenue. But the cups, lemons, and sugar cost you $4. So your profit is $10 minus $4, which is $6.

Revenue makes you feel like a millionaire. Profit tells you if you really are one. That's why grown-up business owners care way more about profit than revenue. A business with $1 million in revenue and $0 profit isn't really making any money. A business with $100 in revenue and $60 profit actually is.

Because if you don't watch your profit, you can accidentally lose money even when you sell a lot.

Imagine your best friend sold 100 cookies for $1 each. That's $100 of revenue. Sounds amazing, right? But what if each cookie cost 80 cents in ingredients, a napkin, and a cute little sticker? Then they actually spent $80 to make that $100. Their profit is only $20.

And what if your friend also spent $15 on a fancy poster and $10 on a new mixing bowl? Now their profit is only minus $5. They lost money even though they sold out.

This happens to real businesses too. Lots of famous startups have huge revenue numbers but no profit. Eventually, if they can't turn revenue into profit, they run out of money and shut down. That's why investors and founders both watch profit closely.

Let's run through a whole lemonade stand day.

Before you start: - Bag of lemons: $3 - Bag of sugar: $2 - Pack of cups: $2 - Ice from home: free - Poster for your stand: $1

Total costs: $8

During the day: You sell 15 cups at $1 each.

Total revenue: $15

Profit math: $15 revenue minus $8 costs equals $7 profit.

Not bad for an afternoon.

Now try a different day. Same lemonade stand, but this time you add a $5 deluxe umbrella so customers can sit in the shade. Your costs go up to $13. You still sell 15 cups for $15 in revenue. Your profit drops to $2.

See how that works? The umbrella didn't help you sell more cups, so spending money on it cut into your profit. If the umbrella had helped you sell 25 cups instead of 15, it would have been worth it. This is the kind of question every business owner asks every day: "Will this purchase make me more profit, or less?"

[IMAGE: A colorful hand-drawn chart showing a lemonade stand with arrows pointing from sales (revenue) to costs (lemons, cups, sugar, poster) and finally to profit, the money left over.] Alt text: Illustration of revenue minus costs equals profit, shown with a lemonade stand example. Caption: Profit is what's left after you subtract your costs from what you earned.

Costs come in two flavors, and knowing the difference is a big deal.

Variable costs go up when you sell more stuff. If each cookie uses 10 cents of flour and 5 cents of chocolate chips, each cookie you bake has 15 cents of variable cost. Bake 100 cookies, spend $15 on ingredients. Bake 200 cookies, spend $30.

Fixed costs stay the same no matter how much you sell. The poster for your stand cost $1 whether you sell 5 cookies or 500. Your mixing bowl cost $10 once. Your phone line, your booth fee at the school fair, the money you paid for flyers. Those don't change based on how many cookies you move.

Why does this matter? Because fixed costs spread out across all your sales. If you only sell 10 cookies, that $1 poster costs you 10 cents per cookie. But if you sell 100 cookies with the same poster, it only costs you 1 cent per cookie. That's why selling more (at the same price) usually makes a business more profitable. Not because revenue went up, but because your fixed costs got split across more customers.

Once you know your profit, you can use it to make smarter choices.

Here are four things profit tells you:

Should I keep making this product? If your profit per item is really small, maybe that item isn't worth the effort. A cookie that earns 5 cents of profit isn't as good as a brownie that earns 50 cents.

Should I raise or lower my price? If profit is tiny, raising the price a little could double your earnings. If profit is fat, lowering prices could attract way more customers.

Should I buy that new supply? Only if it will bring in more profit than it costs. A shiny cookie cutter is fun. A shiny cookie cutter that helps you sell 20% more cookies pays for itself.

Should I expand? If you're making good profit, maybe it's time to add a new product. If you're barely breaking even, fix the numbers first before you grow.

Real business owners check these numbers all the time. They don't just look at how much money came in. They ask, "How much did I get to keep?"

That's the whole difference between feeling successful and actually being successful.

Profit margin is a fancy word for "how much of every dollar you keep."

Here's the math. Take your profit, divide it by your revenue, and multiply by 100. That's your profit margin in percent.

Back to our lemonade stand. You had $7 profit and $15 revenue. $7 divided by $15 equals 0.47. Times 100 is 47%. So your profit margin is 47%. For every dollar a customer paid, you kept 47 cents.

That's actually a great margin. Most businesses are happy with 10% to 30% profit margins. Some industries have very thin margins (grocery stores often keep only 2 or 3 cents per dollar). Some have very fat margins (software companies sometimes keep 70 cents per dollar).

Knowing your margin helps you compare products. A bracelet that sells for $5 with $4 in costs has a 20% margin. A bracelet that sells for $5 with $1 in costs has an 80% margin. Even though they both bring in $5 of revenue, the second one is four times more profitable. Margin helps you spot the winners.

A few traps to avoid:

Forgetting small costs. Sales tax, shipping, the sticker on the box, the electricity to run the blender. These add up. A 50 cent mistake per item across 100 items is $50 gone.

Counting revenue as "made." When someone pays you $10, you didn't "make" $10. You collected $10. What you actually made is whatever is left after costs. Always do the subtraction.

Spending profit before you have it. Just because you made $50 today doesn't mean you can spend all $50. Some of it needs to cover tomorrow's supplies. A good rule is to only spend half your profit on things you want. Keep the other half in the business to buy more materials, fix things, and grow.

Not keeping records. If you don't write down your revenue and costs, you don't know your profit. Use a notebook, a spreadsheet, or even a shoebox with receipts in it. Anything beats nothing.

Undervaluing your time. If you worked 5 hours and made $20 profit, that's $4 an hour. Could you have done something else that earned more? Time is a cost too, even if it doesn't show up on a receipt.

Can a business have lots of revenue and still lose money?

Yes, and this happens all the time. Big famous companies like Uber lost money for years even while making billions in revenue, because their costs were higher than their revenue. A business only "works" when revenue is bigger than costs. Revenue by itself isn't enough.

What's the difference between profit and savings?

Profit is the money a business keeps after paying all its costs. Savings is what a person keeps after paying their personal bills. They're the same idea in different settings. Both are "what's left over," and both matter a lot.

Is it better to have high revenue or high profit?

Profit, usually. A business with high profit is actually making money. A business with high revenue but no profit is just moving money in circles. That said, some businesses chase revenue first to grow fast, then figure out profit later. That's a risky game and often leads to trouble.

How much profit should a small business keep?

Some should go back into the business (for supplies, better equipment, or advertising) and some can go to the owner. A common rule is to save at least 20% of your profit for growing the business, and enjoy the rest. Young entrepreneurs might save even more since you're just getting started.

Do I have to pay taxes on profit?

Grown-up businesses pay taxes on their profit, not their revenue. So a business that had $100 in revenue and $90 in costs would only pay taxes on the $10 of profit. For most kid-run lemonade stands or small side businesses, the amount is small enough that taxes aren't usually an issue. But learning how this works now is a great head start.

1. What's the Difference Between Revenue and Profit?
2. Teaching Kids About Money and Business
3. Junior Achievement Curriculum Resources
4. Profit Margin Explained