Profit Is an Opinion; Cash Is a Fact
A sale can record a profit while the bank balance falls, because cash arrives and leaves on its own schedule of timing. · 12 min
You can find your break-even, price with a margin, and still wake up one morning unable to pay a supplier — while your books say the month was profitable. This is the trap that closes more small ventures than weak sales do. Profit and cash are two different measurements of the same business, kept on two different calendars, and a founder has to watch both. This folio pulls them apart.
Guess before you learn
Your candle business lands a $600 café order. The wax and jars cost you $300, paid today; the café pays you in 30 days. In the month you deliver, what happens to your bank balance?
The order earns a $300 profit the day you deliver it — that part is real. But cash keeps its own calendar: $300 left for materials today, and the café's $600 arrives a full month from now. So the profitable month is the very one your bank balance drops. If you guessed it rose by $300, keep the mark — treating profit and cash as the same thing is the exact mistake that closes profitable businesses.
9–12
3–5
You run a lemonade stand. You bought cups and lemons this morning — that money is already gone from your pocket. Customers pay all afternoon, a little at a time. By closing you have earned more than you spent, but for hours your pocket held less than when you started. Earning money and holding money happen on different clocks.
6–8
Profit is what a sale earns: the price minus what the sale cost you. It is counted the day you deliver. Cash is the money actually sitting in your account right now, and it moves only when money truly comes in or goes out. These two can point in opposite directions. If you pay for materials today but the customer pays you next month, the sale shows a profit now while your cash drops now. The gap is pure timing — the same dollars, arriving and leaving on different days.
9–12
Most bookkeeping records a sale when it is earned, not when the money lands — the $600 order counts as revenue the day you deliver, even though the café pays in thirty days. That unpaid $600 is an account receivable: profit already booked, cash still owed. Meanwhile you paid $300 for materials up front. So the record shows +$300 profit while the bank shows −$300. A business can post a profit every month and still run dry, because bills are paid in cash, and cash is the thing you can actually run out of.
K–2
You sold your drawing for five dollars. But your friend will pay you next week. Today, your money jar has nothing new in it. You earned five dollars, but you do not have it yet.
Undergrad
This is the difference between accrual profit and cash flow. Accrual accounting matches revenue to the period it is earned and costs to the period they help earn it; cash accounting records only money moving. Growth widens the gap: every new order ties up cash in materials and receivables before it pays out, so a fast-growing, genuinely profitable venture can be the most cash-starved of all. The tool for watching it is the cash conversion cycle — the number of days cash is locked between paying suppliers and collecting from customers. Shorten that cycle and the same profit needs far less cash to sustain.
Postgrad
The reconciliation is the statement of cash flows. Net income is the accrual figure; cash from operations is recovered by adding back non-cash charges — depreciation, amortization — and adjusting for changes in working capital: a rise in receivables or inventory consumes cash, a rise in payables releases it. Solvency and profitability are distinct axes. A firm can be profitable and insolvent (positive earnings, no cash to meet obligations) or briefly cash-rich and unprofitable. Financial distress is overwhelmingly a cash event, which is why analysts trust operating cash flow as the harder-to-flatter companion to reported earnings.
receivable
Money a customer owes you for a sale already delivered. It counts toward profit immediately, but it is not cash until it is actually paid.
Why is this true?
Why can a business make a profit every month and still run out of money?
Because profit is counted when a sale is earned, while cash moves only when money truly changes hands. If cash goes out for materials before it comes in from customers, the profitable months can be exactly the ones the balance falls — and bills are paid in cash, not in profit.
Two calendars, one order. To see the split cleanly, ask the two questions separately for the month you deliver the café's candles: what did the sale earn, and what did the bank actually do? Work each answer on its own, then set them side by side.
Profit and cash for the café order, in the month you deliver — the steps fade as you master them
$600 − $300 = $300 profit
$0 — the café pays on day 30, next month
$300 for materials, today
$0 − $300 = −$300
Where does the gap come from? Always from timing. Money you pay before you sell — materials, inventory bought ahead — leaves your account now for a sale that pays later. Money customers owe you sits as a receivable, earned but not yet collected. Plot the bank balance against the profit and the two tell different stories about the very same order.
Keep two running tallies, not one: what the venture earned, and what the bank did. The first tells you whether the business works; the second tells you whether it survives the month. The final unit turns from the numbers back to people — how one satisfied customer becomes the next ten, and the single page that keeps a young venture learning.
Practice — new ink and old, interleaved
1.This month a customer pays you $250 cash for a past order, and you pay $90 for supplies. By how much does your cash change this month?
2.A warm referral is standing in front of you. You have named the price. What do you do?
3.In one sentence, name the three kinds of evidence that a problem is real.
4.Contribution margin is best described as:
5.A baker pays $500 a month for a stall. Each loaf sells for $6 and costs $1 in ingredients. How many loaves must sell to break even?
6.Without looking back: how can profit and cash disagree within a single month?
Profit counts a sale when it is earned, while cash moves only when money truly changes hands, so paying costs early and collecting late can leave a profitable month with a falling bank balance.
How close were you? Grade yourself honestly — it sets your review date.
7.Which month shows a profit while cash falls?
8.Your booth rent rises from $300 to $450, price and materials unchanged. The break-even quantity—
9.A candle sells wholesale for $6 and costs $3 in materials. What is the contribution margin per candle?
10.For the candle booth (break-even at 60), put these three sales levels in order from loss to profit.
- 70 candles sold — profit
- 50 candles sold — loss
- 60 candles sold — break-even