Cash flow management runs on three habits: a rolling forecast that gets updated rather than rebuilt, deliberate control of the working capital cycle, and one named person accountable for the number. Most growing businesses have the first two in a spreadsheet and the third nowhere.
What managing cash flow actually means
Cash flow is the movement of money in and out of the bank account over a period. Managing it means three things, in order: seeing the movement ahead of time, controlling the timing of the pieces you can influence, and holding enough buffer that the pieces you cannot influence do not end the business. Profit is an accounting result. Cash is a balance you can check today.
The two are not the same and are not meant to be. A profit and loss statement is prepared on an accruals basis, so revenue is recognised when it is earned rather than when the money lands. That is set by the AASB accounting standards, and it is why a profitable month and a month where the bank balance went backwards sit together comfortably. In Australia the stakes on getting this wrong are not just commercial: a director has a personal duty to prevent the company trading while insolvent, which is set out in ASIC's obligations of company officeholders. Cash forecasting is how you discharge that duty in practice.
The accruals side of the picture is covered separately in what founders get wrong about the profit and loss statement.
The rolling forecast is the working document
The practical tool is a rolling short-horizon cash forecast, commonly thirteen weeks, listing opening bank balance, expected receipts, expected payments and closing balance for each week. It is not a budget. A budget is set once and measured against; this is updated every week with what actually happened, so the horizon always stays the same distance ahead.
Three rules make it work. Build it bottom up from named invoices and named payments rather than from monthly averages. Record the date the money is expected to move, not the date the invoice was raised. And keep the previous version, so you can see where your estimates were wrong and by how much. That last habit is the one that turns a forecast into a skill instead of a chore, and it is the difference between a finance function whose forecasts are believed and one whose numbers get quietly discounted by the board.
For most Australian scale-ups this is not an optional refinement. Most SaaS businesses at the scale-up stage are burning cash,[1] which means the forecast is the instrument telling you how long you have. If nobody can produce it on request, the honest description of your runway is a guess.
Working capital is where the cash actually sits
Once the forecast exists, the levers you have are almost all working capital levers: how fast customers pay, how fast you pay suppliers, and how much cash is tied up in stock or work in progress before it converts. Cutting a subscription feels decisive and moves the number by very little. Shortening debtor days by a week moves it a lot.
| The lever | What moving it does to cash | |
|---|---|---|
| Debtor days | How long customers take to pay you | The fastest lever most businesses have and the one least often owned. Shortening it converts revenue you have already earned into cash you can spend. |
| Creditor days | How long you take to pay suppliers | Extends the cash cycle, but spends supplier goodwill. Useful as a deliberate negotiated term, damaging as a habit of paying late. |
| Stock and work in progress | Cash sitting in unsold goods or unbilled work | The largest trapped balance in inventory-heavy and project businesses. Billing milestones earlier usually beats discounting stock. |
| Facilities and refinancing | Debt, overdraft and invoice finance | Buys time rather than creating cash. Worth arranging before you need it, which requires someone the lender already trusts. |
This is recognised as a specialist capability, not a general finance one. When I write a brief for an interim CFO into a business under cash pressure, the requirement is usually stated in exactly those terms: cash flow management including working capital and bank relations, particularly refinancing.[2] On a recent project and infrastructure search the three critical skills were work in progress accounting, treasury and working capital management, and acquisition experience.[3] Working capital sits in the top three because it is where the money is.
Who owns the cash position as you scale
In the early months the founder owns it, and that is fine. It stops being fine at the point where the founder is the only person who can explain the number. Founder-led finance does not scale at all. It eventually runs its course as the business grows, and the symptoms are consistent: a scrambled financial model and cash conversations that are more of a guess than a position.[4]
The next owner is not automatically a CFO. In a business of roughly ten to twenty people the right answer is usually a first finance hire who can own the forecast, the collections cycle and the reporting. The CFO question arrives later, and when it does the cash-facing part of the role is explicit. Founders hiring at that level look for someone operationally close to the detail who can act as their commercial eyes and ears and who has demonstrated credibility with banks, funders and investors.[5] Credibility with a lender is not a soft quality. It is what determines whether a facility gets extended in the quarter you need it extended.
If the forecast keeps arriving late or wrong, the problem is usually structural. Here is how a startup finance team should be structured as it grows.
What breaks when the wrong person owns it
Three failures repeat. The first is that the forecast is rebuilt from scratch each month, which means nobody ever learns how wrong the last one was. The second is that collections quietly become nobody's job, because the person best placed to chase is also the person managing the customer relationship. The third is the expensive one: the cash position is reported accurately and nobody draws a conclusion from it, so a decision that needed making in March gets made in June.
None of the three is a technique problem. The arithmetic in a cash forecast is trivial. Deciding what it means for the hiring plan, the pricing, and the next raise is the job, and that is the thing you are actually hiring for.
The timing question is covered in full in when to make your first finance hire and when to hire a CFO.
Common questions
What is the difference between cash flow and profit?
Profit is an accounting result measured over a period on an accruals basis, so revenue counts when it is earned rather than when it is paid. Cash flow is the money actually moving in and out of the bank account. A business can post a profitable month and still go backwards on cash in that same month, usually because customers have not paid yet or stock has absorbed the difference. Reading only one of the two is how founders get surprised.
How far ahead should a cash flow forecast run?
Thirteen weeks is the common working horizon because it is short enough to build from named invoices and payments rather than averages, and long enough to give you time to act. Roll it forward every week rather than rebuilding it monthly, and keep the previous versions so you can see where the estimates drifted. A longer annual view is still useful for planning, but it is a different document and it will not catch a timing problem.
Which levers actually improve cash flow fastest?
Working capital levers, almost always. Shortening the time customers take to pay converts revenue you have already earned into spendable cash and usually moves the number more than a round of expense cuts. Stock and unbilled work in progress are the next largest trapped balances, particularly in inventory-heavy and project businesses. Debt facilities buy time rather than create cash, and are far easier to arrange before you need them.
Who should own cash flow in a startup?
The founder owns it at the start, and that works until the founder is the only person who can explain the number. By roughly ten to twenty people, a first finance hire should be taking on the forecast, collections and reporting. A CFO comes later, and at that level the cash-facing part of the brief is explicit: working capital, bank and funder relationships, and the ability to say what the position means for the plan rather than just report it.
References
- What I see at that stage: most SaaS businesses at the scale-up stage are burning cash.
- From an interim CFO brief written by Tom Hunter: the three critical requirements were a project infrastructure background, experience with cash flow management including working capital and bank relations, especially refinancing, and previous acquisition experience.
- From a Story Recruitment search for a project construction and infrastructure client: the three critical skills required were work in progress project accounting, treasury and working capital management, and M&A experience covering completion accounting and the acquisition process.
- The point I make here: it does not scale at all, eventually running its course as a business grows and leading to a scrambled financial model and cash conversations that are more of a guess.
- How this plays out by stage: direct ownership and operational experience alongside strategic work, someone who can act as their commercial and strategic eyes and ears, with demonstrated credibility with banks, funders or investors. Tom Hunter hosts The CFO Track, a podcast of interviews with Australian CFOs and finance leaders.