A profitable business can still fail if it runs out of cash, because profit and cash are not the same thing. This guide explains the timing gap between earning and being paid, how to build a simple month-by-month forecast, and why the GST you collect must be set aside, not spent.
A profitable business can still fail if it runs out of cash. Profit is what you earn on paper; cash flow is the actual money moving in and out of your bank account. A business can be profitable but cash-poor — waiting on invoices while bills fall due — and that timing gap is what sinks many otherwise healthy small businesses. Managing cash flow is about survival, not just growth.
A simple budget calculator is a good starting point for mapping money in and out.
The core issue is timing. You might make a sale today and record the profit, but not receive the cash for 30 or 60 days. Meanwhile, rent, wages and suppliers need paying now. That gap between earning and being paid is where cash-flow trouble lives, and it is why a growing business can actually feel tighter on cash — growth ties up money in unpaid invoices and stock before it comes back.
A cash-flow forecast is just a month-by-month projection of money coming in and going out. List your expected income by when you will actually be paid — not when you make the sale — and your expected outgoings by when they fall due. The running balance shows you, in advance, which months will be tight.
Closing balance = Opening balance + Money in − Money out
Doing this even roughly, a few months ahead, is one of the highest-value habits a small business can build. It turns a cash crunch from a nasty surprise into a problem you saw coming and planned around.
Several levers can ease the timing gap:
Our invoice builder helps you send clear invoices quickly, which is often the fastest cash-flow win available.
Our BAS checklist and GST calculator help you keep the tax side visible.
Even well-run businesses hit tight patches. Options to bridge them include a business overdraft, an invoice finance facility, or a short-term business loan — each with a cost that should be weighed against the need. The key is to see the shortfall coming through your forecast and arrange finance calmly in advance, rather than scrambling when the account hits zero. Cash-flow planning is what buys you that time.
Why does cash flow matter more than profit?
A profitable business can still fail if it runs out of cash. Profit is earned on paper; cash flow is the actual money in your account. A business can be profitable but cash-poor while waiting on invoices, and that timing gap sinks many otherwise healthy businesses.
Why can growth worsen cash flow?
Bigger orders mean buying more materials and paying more wages upfront, often long before the customer pays. Rapid growth ties up money in unpaid invoices and stock, so a growing business can feel tighter on cash even while profitable.
How do I build a cash-flow forecast?
Project money in and out month by month. List expected income by when you will actually be paid, not when you make the sale, and outgoings by when they fall due. The running closing balance shows which months will be tight, in advance.
Why shouldn't I spend the GST I collect?
The GST you collect is the ATO's money, owed at BAS time, not yours. Spending it as it comes in leaves you short when the bill arrives. Set GST aside as you collect it and plan for BAS and tax payments in your forecast.
What can I do if cash runs short?
Options include a business overdraft, invoice finance, or a short-term business loan, each with a cost. The key is to see the shortfall coming through your forecast and arrange finance calmly in advance rather than scrambling at zero.