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Cash Is Not Profit

By Paul Hynek, November 3, 2026

Every founder learns three words the hard way, and I would rather you learned them from a lemonade stand. Here they are: cash is not profit.

I teach accounting at Pepperdine, and I open every term the same way. Profitable companies go bankrupt every day. Bankrupt does not mean you are not profitable. It means you ran out of cash. Unprofitable companies, meanwhile, can be worth billions. The two numbers are related, but they are not the same number, and the difference is where most new businesses get into trouble.

The lemonade stand

Say you are ten years old and you want to sell lemonade on a sunny Saturday. You have no money, so you borrow $15 from Mom for lemons, sweetener and cups. Your supplies cost $10. You have a good day and sell 30 cups at $1 each, with nothing left over.

How did the business do? Easy: $30 in sales, $10 in costs, $20 of profit. Not a bad start to a citrus empire.

But that $20 does not tell you about the money you borrowed from Mom. There is no place for a loan next to your sales. So take a second look, and call it cash. Before you talked to Mom you had nothing. After you talked to Mom you had $15. At the end of the day you have that $15 plus the $20 you made, which is $35 in the cash box.

Your profit is $20. Your cash is $35. Same business, same day, two different numbers, and both are right. The loan never shows up in profit, because a loan is not a sale. It shows up in cash, because it is sitting in the box.

Why the numbers drift apart

The lemonade stand is the simplest case. In a real business the gap between profit and cash opens up for four reasons, and your projections need all four.

Add inventory to that list for anyone who sells a physical product: you pay for the stock months before you sell it, and the cost only reaches the P&L when the sale happens.

How profitable companies run out of cash

Here is the pattern I have watched a hundred times. A company lands a big contract, so it hires and buys inventory to deliver it. The contract pays net 60. For two months the P&L shows a healthy profit and the bank account drains, because the money for the hires and the inventory went out before a dollar came in. If there is no cushion, the company misses payroll while technically profitable.

That is why the Cash Flow Statement exists. Its whole job is to translate the profit at the top into the cash at the bottom. Net income comes in from the P&L, the statement adds back the depreciation that was never actually paid to anyone, subtracts the receivables you are still waiting on, adds back the payables you have not paid yet, takes out the equipment and inventory you bought, and adds the loans and investment that came in. What is left is what is in the bank.

What to do about it

Two numbers matter more than profit until your cash stops being a concern.

A set of projections can show losses for a year, or three, and still be a plan an investor will fund. What it cannot show is a month where cash goes below zero. When it does, you change something in the plan until it does not.

That is the whole lesson. Profit is an opinion about how the business did. Cash is a fact about whether it can keep going. Watch both, but never confuse them.

The free Accounting 101 Boot Camp walks through the lemonade stand with the actual statements, and EZ Numbers builds the cash flow for your own business, month by month, so you see the gap before it bites.

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