How a Profitable Business Runs Out of Money

Build a thirteen-week cash forecast this week. Not a budget, not a P&L, not a forecast your accountant prepares for the bank. A single sheet with the opening bank balance on the left, thirteen columns across the top, every dollar you expect in and every dollar you know is going out, and a running balance along the bottom.

If that bottom row ever goes red, you now know the date. Knowing the date is the entire game.

Most owners who lose a business didn't lose it because the business was bad. They lost it because the money that was owed to them arrived eleven days after the money they owed someone else was due, and eleven days was enough.

Profit and cash are different things, and only one pays rent

Profit is what's left after you match revenue to the costs of earning it, on paper, over a period you chose. Cash is what's in the account when the direct debit hits.

They diverge for boring reasons. You invoiced in March and got paid in June. You bought inventory in January and sold it in April. You capitalized a truck so it barely dents the P&L, but you wrote a check for the whole thing. You're carrying a tax bill that accrued quietly for nine months and lands as one number.

Take a contractor doing a job worth $120,000, with $90,000 of cost and a $30,000 margin. Good job. On the P&L it looks like a good year in one line. But he's paying labor weekly and materials on 30 days, while the client pays 45 days after completion. He's funding $90,000 out of pocket for two to three months. Win three of those at once and he's underwater by a quarter of a million dollars while being, technically, very profitable.

That's the shape of it. The bigger the win, the bigger the hole it digs first.

Growth is the most expensive thing you'll ever buy

Nobody warns you that a good year can kill you. More sales means more inventory, more payroll, more deposits with suppliers, more vans, more people who need paying before the customers pay you. Every dollar of growth has a cash cost that lands before the profit does.

The number to know is your cash conversion cycle. Days from when money leaves your hands to when it comes back. Add the average days your inventory sits, plus the average days customers take to pay, then subtract the average days you take to pay suppliers. If that number is 60, then every new dollar of monthly revenue needs roughly two months of funding before it stands on its own.

Work it out once. Write it on the wall. It tells you exactly how fast you're allowed to grow on your own money.

Build the thirteen weeks properly

Weekly, not monthly. Monthly hides everything, because payroll doesn't know it's a month.

In: customer payments by expected date, not invoice date. Be honest. If a customer has paid you late every time for two years, don't forecast them paying on time. Put in the date they actually pay.

Out: payroll and payroll taxes, rent, loan and lease payments, insurance, supplier payments by due date, sales tax, estimated income tax, card processing fees, subscriptions. The quarterly and annual items are the ones that ambush people. Insurance renewal. The tax payment. The software that bills once a year. Put them in the week they hit.

Update it every Monday morning. It takes twenty minutes once it exists. Compare last week's forecast to what actually happened and you'll learn more about your business in six weeks than in six years of monthly management accounts.

The value isn't the accuracy. It's the lead time. A problem you can see nine weeks out has a dozen solutions. The same problem on Thursday afternoon has one, and it's expensive.

Your payment terms are a product decision

Most businesses set terms by accident, then complain about them for a decade.

Deposits change everything. A third up front, a third at a defined milestone, the balance on completion means the customer funds the job instead of you. Yes, some will refuse. The ones who refuse a deposit are disproportionately the ones who'll be slow at the end.

For ongoing work, bill in advance where you can. Monthly retainers billed on the first, collected by card or direct debit, beat the same revenue invoiced in arrears with net 30 by a mile.

Shorten your terms on new contracts. Net 30 rather than net 45 is a conversation, not a war. And put late payment interest in writing even if you rarely charge it. It gives you something to waive.

On the other side: pay your suppliers on their terms, not early. Paying early feels virtuous and costs you the free financing you negotiated. Pay on day 30 of net 30. Never pay late — the relationship is worth more than the float — but never pay on day 3 either.

Chasing money is a job, not a mood

Decide who owns collections. If it's nobody, it's you, and you'll do it badly because you're conflicted about it.

Have a schedule and follow it. A statement a week before due. A short email on the due date. A phone call three days after. A call to the person who signs, not the person who processes, at day ten. Every step polite, every step happening.

Two practical things. Get the invoice right the first time, because a wrong purchase order number buys the customer another thirty days for free. And find out the customer's payment run date before you invoice. Missing the cutoff by a day costs you a month.

Money in the account that isn't yours

Sales tax. Payroll withholding. Customer deposits for work you haven't done. All of it sits in your bank account looking exactly like cash, and none of it is.

Open a second account. Sweep the tax portion into it the same week you collect it. This single habit removes the most common way that good businesses hit the wall, which is spending tax money on operations and then meeting the tax deadline with nothing.

Talk to your accountant about the right percentage and the right timing for your structure. That part is genuinely specific to you.

Arrange credit while you don't need it

Banks lend to businesses that look like they'll be fine. That's not cynicism, it's how underwriting works. A line of credit set up in a good quarter costs you almost nothing to hold and is the cheapest insurance you'll ever buy. The same line requested in a bad quarter either costs a fortune or doesn't happen.

Hold a buffer and measure it in weeks of fixed costs, not dollars. Eight weeks is a reasonable place to aim. Below four, you're making decisions under pressure, and pressure decisions are how discounts get given and good people get let go one month before it turns.

When it does get tight

Order matters. Talk to people before you miss anything — a supplier you call is an ally, a supplier you dodge is a creditor. Pause discretionary spend and hiring. Convert stale inventory to cash at a discount you'd normally refuse. Chase every overdue invoice personally in one concentrated week. Ask your largest customer for early settlement at a small discount; a fair number will say yes.

What you don't do is take expensive short-term money to avoid an uncomfortable phone call. That's how a cash problem becomes a solvency problem.

Watch the bank balance daily and the thirteen-week line weekly, and the business will tell you what it needs long before it starts shouting.