A business can be profitable on paper and still fail to pay its suppliers. This is not a contradiction, and it is not rare. It is the most common way small businesses fail.
The reason has a precise structure worth learning.
| Stage 1 | cash goes out to buy stock |
|---|---|
| Stage 2 | stock sits until it sells |
| Stage 3 | customer takes time to pay |
| Stage 4 | cash comes back |
The cycle
Between paying a supplier and being paid by a customer, your money is somewhere other than your bank account. First in inventory, then in a receivable.
Three periods define how long that takes:
- How long stock sits before it sells
- How long customers take to pay after you invoice
- How long you take to pay suppliers after you receive goods
The first two are money going out of your reach. The third is money staying in it. The cycle length is roughly the first plus the second, minus the third.
The longer that figure, the more cash the business needs simply to operate — and crucially, the faster it grows, the more it needs.
Why growth consumes cash
This is the part that catches founders out, because it is counter-intuitive.
Suppose your cycle is sixty days and you double your sales. You now need to hold roughly double the stock and you are waiting on roughly double the receivables. The extra working capital has to come from somewhere before the extra profit arrives.
So a business can take on a large new customer, celebrate, and be unable to pay wages two months later — because the order consumed cash before it generated any.
The practical rule that follows: growth must be funded, either from reserves, from credit, or by shortening the cycle. Assuming it funds itself is the error.
Why island importing makes this worse
The cycle is structurally longer where goods travel far, and the reasons compound:
- Suppliers abroad often require payment before shipping, especially for a new customer
- Shipping takes weeks — money is gone and goods have not arrived
- Larger orders are necessary to keep freight economical, which means holding more stock
- Buffer stock is prudent because resupply is slow, adding further to holdings
- Local customers may still expect credit terms
Put together, an importer can easily be financing three to four months of the cycle. That is the number to plan around, not the margin on the sale.
Shortening the cycle
Each of the three periods can be attacked, and the order below reflects what usually works fastest.
Collect faster.
- Invoice immediately on delivery, not at month end
- State terms clearly on the invoice and agree them before supplying
- Follow up the day after due date, politely and consistently
- Offer a small discount for early settlement where margin allows
- Take deposits on large or custom orders
The second item is worth dwelling on: a large share of late payment is not refusal but ambiguity. Terms that were never agreed cannot be enforced, and invoices that arrive late get paid late.
Hold less stock.
- Identify which lines actually turn over and which sit
- Clear slow stock even at reduced margin — cash tied up in unsold goods earns nothing
- Order more frequently in smaller quantities where freight allows
- Consider consolidating shipments with other importers
Negotiate supplier terms.
- Ask for terms once you have a payment history — many suppliers will grant them and are never asked
- Build the history deliberately: pay early on small orders to earn terms on large ones
- Compare a discount for early payment against your cost of capital before taking it
The middle point there is a strategy rather than a tactic: a reputation for paying on time is an asset that converts directly into working capital.
Forecasting rather than reacting
A monthly profit figure will not warn you about a cash problem. A rolling cash-flow forecast will.
The minimum useful version takes an hour to build:
- Opening bank balance
- Expected receipts by week, based on actual invoice due dates
- Committed payments by week — suppliers, wages, rent, tax, loan repayments
- Closing balance each week
- Extend thirteen weeks ahead and update every week
Thirteen weeks is the useful horizon because it is long enough to see a problem coming and short enough to be reasonably accurate.
What the forecast gives you is time. A shortfall spotted eight weeks out can be solved by chasing receivables or delaying an order. The same shortfall discovered on the day is solved by emergency borrowing at bad rates, or not at all.
Frequently asked questions
How can a profitable business run out of cash?
Because between paying suppliers and being paid by customers, the money sits in inventory and receivables. The longer that cycle, the more cash the business needs just to operate.
Why does growth make it worse?
Because more sales mean more stock held and more receivables outstanding — the extra working capital is needed before the extra profit arrives, so growth must be funded rather than assumed to fund itself.
What is the fastest improvement available?
Collecting faster. Much late payment is ambiguity rather than refusal — agree terms before supplying, invoice on delivery, and follow up the day after due date.
What does a cash-flow forecast actually buy you?
Time. A shortfall seen eight weeks ahead can be managed; the same shortfall found on the day is solved by emergency borrowing at bad rates, or not at all.
