Who prepares a 13-week cash flow forecast?
- Jul 17
- 4 min read
Ask ten businesses who builds prepares their 13 week cash flow forecast, and you'll get three different answers. All of them correct.
In my experience, there are three types of people who typically own this work. Which one applies depends on the size of the business, its structure, and sometimes how much trouble it's in.
The Finance manager: CFO or FP&A
In most businesses, the 13-week cash flow forecast sits with the finance function. Depending on the size of the company, that means the CFO, the FP&A manager, or a finance manager who covers both.
This is the most common setup, particularly in smaller and mid-sized businesses where there isn't a dedicated treasury function. The finance manager is already running the budgeting cycle, producing management accounts, and overseeing the annual forecast. The 13-week cash flow sits alongside all of that as the short-term operational view.
What distinguishes the 13 week cashflow from the rest of their forecasting work is the granularity. Where the budget looks at monthly revenue and cost lines, the 13WCF is looking at specific invoices, payment dates, and cash timing. It's a different kind of thinking, and in businesses that haven't done it before, it can take a while to get right.
In larger organisations with both a CFO and an FP&A function, there's sometimes a question of who owns what. The cleaner split is for FP&A to own the longer-range scenarios and budget-based forecasting, while the finance team handles the short-term receipts and disbursements view that drives the 13-week forecast. In practice, the two should be feeding each other, not operating in silos.
The Treasury manager: visibility across the group
In larger businesses, particularly those with multiple entities or subsidiaries, cash flow forecasting often sits with the treasury manager rather than the finance function.
The distinction matters. A finance manager is typically focused on understanding whether the business has enough cash. A treasury manager is focused on where that cash is sitting and how to deploy it efficiently across the group.
If the treasury manager's forecast shows that one subsidiary is heading for a shortfall in week six, they can arrange an intercompany transfer ahead of time to make sure that entity has sufficient liquidity. Without that forward visibility, the issue only becomes apparent when the account hits zero.
Treasury also has to think about cash pooling and netting arrangements, optimising idle balances across multiple accounts, and making sure the group isn't simultaneously borrowing in one entity while sitting on excess cash in another. The 13-week cash flow forecast is the tool that gives them the visibility to manage all of that proactively rather than reactively.
It's a more sophisticated use of the same underlying model, and it's one reason why treasury management and cashflow forecasting are increasingly seen as inseparable in larger businesses.
The consultant: when the business needs outside help
The third, and in my experience most common, scenario is that the 13-week cash flow forecast is built by an external consultant.
That's not a criticism of internal teams. It's a reflection of reality. Many businesses don't have a working 13-week forecast at all, and others have one that isn't fit for purpose: built on shaky assumptions, not updated regularly, or structured in a way that doesn't give the right visibility.
Consultants get brought in across a wide spectrum of situations. At the less urgent end, it might be a well-run business that wants to improve its forecasting discipline and needs someone with the specific experience to build the right model and set up the right process. At the more urgent end, it's a business in serious financial difficulty that needs a credible, robust 13WCF built quickly because lenders are asking for it and there's no time to learn on the job.
The earlier a business brings in outside help, the more options there are to work with. I've seen businesses wait until they're in genuine distress before reaching out, and by that point the window for the best outcomes has often narrowed significantly. A consultant engaged early, when the business is stressed but not yet in crisis, can build the forecasting infrastructure and use it to get ahead of the problems rather than just react to them.
In a restructuring situation, the consultant's role goes beyond just building the model. They're often the ones presenting it to lenders, using it to support negotiations, and keeping it updated on a weekly basis as the situation evolves. The 13-week cash flow forecast is, in many cases, the single most important document in a restructuring process, and having someone experienced enough to build and defend it is not optional.
Regardless of who prepares a 13 week cash flow forecast, someone has to own it
The common thread across all three scenarios is that the 13-week cash flow forecast needs an owner. Someone who builds it properly, updates it weekly, and is accountable for the assumptions inside it.
In my experience, the businesses that struggle most with cash visibility aren't the ones without sophisticated software or a large finance team. They're the ones where nobody has taken clear ownership of the short-term cash position. The forecast either doesn't exist, or it exists but nobody's really using it.
Cash flow management doesn't run itself. It needs someone whose job it is to know what's coming.
If you're not sure whether your current forecasting is giving you the visibility you need, I'm happy to have a conversation. I work with businesses across the spectrum, from those building their first proper 13-week cash flow forecast to those in the middle of a restructuring who need it done fast. Grab my free template to get started, or get in touch directly if you'd like to talk through your situation.
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