The Cash Flow Gap: Why You Need Money Before Your Customers Pay You

Your money leaves before it arrives. You pay the supplier, you pay the staff, you deliver the work, and only then do you start waiting for the customer. The distance between those two events is your cash flow gap, and every business that sells on terms is funding one, whether or not the owner has ever measured it.

This is a timing problem, not a profit problem. A job with a perfectly good margin can still leave you short in the weeks before the payment lands, which is why profitable businesses go broke so regularly. The question here is how wide your gap is and what you can do about it.

Put real dates on one real job

Take a printing business with a ₦1,200,000 order, placed on 1 September.

• 8 September: pays the paper supplier ₦500,000, upfront, because that is the supplier's term.
• 25 September: pays ₦300,000 in salaries for the month the work was done.
• 30 September: delivers and invoices ₦1,200,000 on Net 30.
• 30 October: invoice falls due.
• 12 November: the customer actually pays, after two reminders.

The job made ₦400,000. Nobody disputes that. But ₦800,000 left the business starting on 8 September and nothing came back until 12 November, which is 66 days of funding somebody else's order out of your own pocket. Now run five of those jobs at once and you need roughly ₦4,000,000 of working capital just to keep standing still. That is the number most owners have never worked out, and it is the one that decides whether growth is safe.

Measure the gap

Two figures give you most of the picture, and both use numbers you already have.

Your DSO (days sales outstanding) is how long your invoices actually take to get paid, which is rarely what your terms say. Divide what you are currently owed by your sales for the period, then multiply by the number of days in it. If you invoiced ₦6,000,000 over the last 90 days and you are owed ₦2,000,000 today, your DSO is about 30 days. Your DPO (days payable outstanding) is the same calculation on the money you owe suppliers.

The gap is roughly the days you hold stock or work in progress, plus DSO, minus DPO. Hold materials for 20 days, get paid in 45, pay suppliers in 15, and you are out of pocket for 50 days on everything you sell. Track that figure monthly. A gap widening month over month is the earliest warning signal you will get, and it usually shows up long before the bank balance looks frightening.

The levers that shrink it

Four things move the number, and all four are in your control.

1. Invoice the day the work is done. An invoice sent five days late is five days of gap you volunteered for. It is free to fix, and most businesses quietly lose a week here every month.
2. Take deposits. Thirty to fifty percent upfront makes the customer a part funder of their own job, and it removes the worst of the upfront outlay.
3. Shorten terms where you can. Net 15 instead of Net 30, especially on new and smaller accounts, cuts the tail of the gap directly.
4. Chase earlier. A reminder three days before the due date and one on the morning it falls due does more than three angry calls at day 60. Most of the habits that get you paid faster come down to moving the chase forward.

Stretching your own payables is the other obvious lever, but handle it carefully. Negotiating longer terms with a supplier openly is good business. Silently paying them late is a slow way to lose your supply chain and your own terms with it.

Fund the gap you cannot close

Some gap always survives. Fund it on purpose instead of discovering it on the Friday payroll is due.

That usually means a cash buffer sized to the gap. If you are out of pocket for 50 days and you turn over ₦3,000,000 a month, you need something like ₦5,000,000 available to cover the work in flight. It can also mean an overdraft or invoice financing, which are legitimate tools, but price them honestly. Borrowing at 30% a year to bridge a 60-day gap costs you around 5% of the invoice value. If invoicing three days sooner and chasing a week earlier closes half that gap, you have just beaten the lender for nothing.

Shrink the collection end first

The supplier end of the gap is mostly fixed by contract. The collection end is where the movement is, and it is the end most owners ignore until it hurts. Arvalox tracks what you are owed and when it was really due, ages it by risk so you know who to chase first, and sends the reminders before and after the due date, which pulls the payment date back toward the one you agreed.