The 6-Week Cash-Flow Runway Check: how SME owners spot a funding gap before it becomes a crisis

Most funding emergencies are not surprises. They are gaps that were visible weeks earlier and simply were not measured.

By the time an SME owner feels the pressure — a supplier calling, a payroll date looming, a big order that needs stock upfront — the runway is often already short. The cost of acting late is real: rushed decisions, worse terms, and less time to prepare the right documents.

This is not about promising funding. It is about a simple habit that gives you back the one thing a late scramble takes away: time.

What “runway” means for a small business

Runway is how many weeks your business can keep operating using the cash it can realistically expect to have — before an expected shortfall hits.

You do not need accounting software or a finance degree to estimate it. You need three honest numbers:

• Cash on hand today — what is actually in the account, not what is owed to you.
• Money genuinely coming in over the next 6 weeks — invoices you are confident will be paid, on dates you actually believe.
• Money going out over the same 6 weeks — payroll, rent, suppliers, tax, loan repayments, and the ordinary running costs that never stop.

When you line those up week by week, a pattern appears. Somewhere in the next six weeks, one line usually dips lower than the others. That dip is your gap — and now you can see it before it sees you.

Why 6 weeks?

Six weeks is long enough to be useful and short enough to be honest.

• Too short (1–2 weeks) and you are already in crisis mode. There is no time to prepare properly.
• Too long (6+ months) and the numbers become guesses. Nobody can predict that far with a straight face.

Six weeks is roughly the window in which a responsible funding conversation can happen calmly — time to gather documents, understand affordability, and make a decision without a gun to your head. It is a planning horizon, not a promise.

The check, step by step

Do this on a Monday morning, before the week swallows you. It takes about 15 minutes.

• Week 1 — Cash on hand. Write down your real bank balance today. Not the invoiced total. The balance.
• Week 2 — List the money in. For each of the next six weeks, write what you genuinely expect to receive and when. Be strict. A “maybe” is not an “in”. If a client has been 30 days late three times, do not put them down as paying on day one.
• Week 3 — List the money out. Payroll dates. Rent. Supplier payments. VAT and tax. Loan and account repayments. The small recurring costs. Put them on the weeks they actually fall.
• Week 4 — Find the low point. Running week by week, subtract out from in and carry the balance forward. Circle the lowest weekly balance in the six weeks. That is your tightest moment.
• Week 5 — Ask the honest question. If that low point is comfortable, good — you have breathing room. If it is tight or negative, you have found a gap early, while you still have options.
• Week 6 — Decide with time on your side. A visible gap gives you choices: chase debtors sooner, delay a discretionary spend, phase a large order, or start a responsible funding conversation with the right documents ready. Early planning is the whole point.

Turn the gap into a plan, not a panic

A gap on paper is not a failure. It is information. The businesses that handle funding well are rarely the ones with the most cash — they are the ones who saw the tight week coming and prepared.

If the check shows a genuine shortfall, the calm next step is to understand your options before the pressure lands:

• Get your funding folder in order (bank statements, management accounts, debtors and creditors lists, tax documents).
• Be realistic about affordability — borrowing should fit what the business can comfortably repay, not just cover today’s gap.
• Talk to a lender early, when you can compare options rather than accept the first one available.

Funding is never guaranteed, and no responsible lender can promise an outcome, a rate, or immediate access to funds. What you can control is showing up early, informed, and prepared. That is where the 6-week runway check earns its keep.

Save this. Send it. Ask it.

• SAVE the 6-week runway check and run it every Monday for a month.
• SEND it to your co-founder, bookkeeper, or accountant so you are reading the same numbers.
• ASK yourself the honest question: if a big order or a slow month landed next week, would I see it coming — or feel it coming?

Ndzinga Capital works with South African SME owners on responsible, affordability-first funding. Start with the numbers. The runway check is free, and it is yours.