In short: Robert Nikic on why profitable businesses run out of cash: six common cash flow mistakes, what the data shows and how to fix each one.
A company can be profitable on paper and broke by Friday. I've watched it happen to good operators with real customers, strong margins and a product people loved. None of them were lazy. Most of them were growing.
That's the part people miss. Cash problems rarely look like failure while they're forming. They look like success with a delay.
The numbers back this up. When the JPMorgan Chase Institute studied the bank accounts of 597,000 small businesses, it found the median one held enough cash to cover 27 days of normal spending if money stopped coming in. A quarter of them had less than 13 days. Restaurants had 16 (JPMorgan Chase Institute).
Less than a month. That's the cushion between a normal company and a crisis.
Here are the six cash mistakes I've seen sink companies that should have made it.
1. Treating profit as cash
Your profit and loss statement says you made money. Your bank account disagrees. Both are telling the truth.
Profit counts a sale when it happens. Cash counts it when the money lands. If your customers pay in 60 days and your suppliers want payment in 15, every sale you make opens a hole before it fills one. The faster you sell, the bigger the hole.
I've watched founders celebrate a record month while their accountant quietly called the bank about an overdraft.
The tell: you're profitable every month and still stressed every payroll.
The fix: run a simple 13-week cash forecast. Every Monday, list the cash you expect to come in and go out, week by week, for the next quarter. It takes an hour. It will show you the hole weeks before you fall into it.
2. Saying yes to the order you can't afford to fill
The big order is the most dangerous kind of good news.
A national buyer wants five times your usual volume. To fill it, you need to buy materials, hire temps and maybe rent space, all before the buyer pays a cent. And big buyers almost always pay slowly.
I've seen companies take the order of their dreams and run out of cash halfway through making it. The order wasn't the problem. Funding it out of the checking account was.
The tell: you're excited about an order and haven't worked out when you'll actually get paid for it.
The fix: before you say yes, map the cash: when you pay suppliers, when you pay people and when the money actually arrives. Then fund the gap on purpose, with a deposit, better payment terms, a line of credit or a smaller first order.
3. Letting invoices get old
Every unpaid invoice is a loan you made to your customer at zero interest. Nobody approved that loan. It just happened.
I've watched companies with millions in revenue carry months of unpaid invoices because nobody owned collections. The founder didn't want to be pushy. The team assumed someone else was on it. Meanwhile, the company borrowed money at real interest to cover cash that customers owed it.
The tell: you can't say, off the top of your head, how much customers owe you and how much of it is overdue.
The fix: send invoices the same day the work is done. Put a follow-up schedule in writing: a friendly reminder on the due date, a call at 7 days late and a hold on new work at 30. Make one person responsible. Polite and consistent beats awkward and occasional.
4. Buying inventory on optimism
Inventory is cash sitting on a shelf. It feels like an asset until it stops selling.
The pattern I've seen most often goes like this. A product sells well, so the founder orders big to get a better unit price. Then demand slows, a trend fades or a competitor drops their price, and the company is sitting on months of stock it already paid for.
The discount on the big order was real. So was the cash it locked up.
The tell: you're ordering based on how a product felt last season, not how fast it's actually selling now.
The fix: reorder based on sell-through, the share of stock that actually sold in a given period. Order smaller and more often, even at a slightly higher unit cost. A slightly higher price per unit costs far less than a warehouse full of last season's best idea.
5. Running without a buffer
Most companies don't decide to run with no cushion. They just never decide to build one.
Every extra dollar goes back into growth, which feels responsible. Then a big customer pays late, a key supplier raises prices or a slow month shows up, and there's nothing to absorb it.
The JPMorgan Chase Institute measure is a good one to steal. Divide your cash balance by your average daily spending. That's how many days you could survive if every customer stopped paying tomorrow.
The tell: you've never calculated that number.
The fix: pick a target and write it down. For a lot of the companies I've seen, 60 to 90 days of spending is a reasonable floor. Treat the buffer like a bill you pay yourself every month, before the extra money goes anywhere else.
6. Asking for credit when you're desperate
Banks lend most easily to companies that don't need the money. That sounds unfair. It's also how it works.
The Federal Reserve's Small Business Credit Survey found that 56% of firms looking for financing wanted it to cover operating expenses. And 22% of firms that applied got none of what they asked for (Federal Reserve Banks).
I've watched founders walk into a bank in the worst month of the year, with messy books and a payroll due in a week, and get turned down. Same founder, six months earlier, with clean numbers and no urgency, would have been approved.
The tell: you've never talked to a lender while things were good.
The fix: open a line of credit when the business is strong, and don't touch it. Keep your books clean every month, not just at tax time. The best time to borrow is when you could walk away from the offer.
Quick answers
Why do profitable businesses run out of cash?
Profit is counted when you make the sale. Cash arrives when the customer pays. A company can book strong profits while its money sits in unpaid invoices and inventory, then come up short on payroll. Growth makes it worse, because every new order needs cash before it pays back.
How many days of cash does a typical small business have?
JPMorgan Chase Institute found the median small business holds about 27 days of cash buffer, and a quarter hold fewer than 13 days (JPMorgan Chase Institute). The businesses I've seen survive a bad quarter built well past that, a little at a time, out of profits.
What is Robert Nikic's advice on cash flow?
Robert Nikic's advice is to manage cash, not just profit. Map when money goes out and when it comes in before saying yes to a big order, collect invoices on time, buy inventory against real demand and line up credit before you need it.
What these six have in common
None of these mistakes are about being bad at business. They're about letting good news run the company without checking what it costs.
Here's the short version:
- Forecast cash every week, not just profit every month.
- Fund big orders on purpose before you accept them.
- Invoice the same day and chase with a schedule.
- Order inventory by what sells, not what you hope will sell.
- Build a buffer and treat it as a bill.
- Set up credit before you need it.
Profit tells you whether the business works. Cash tells you whether it survives.
Related reading
Robert Nikic is an entrepreneur, TEDx speaker and advisor on innovation and economic growth. He writes about what he has seen build and break companies, and about the rules that decide whether small businesses get a fair shot. Read his writing on Medium, the Open Doors newsletter on LinkedIn and daily posts on X.
