Profit Is an Opinion, Cash Is a Fact: The 13-Week View

There’s an old line in finance that profit is an opinion and cash is a fact, and like most old lines it survives because it’s true. A profit figure depends on judgements — when revenue is recognised, how costs are spread, what’s accrued. Cash depends on nothing but whether the money is in the account. And the uncomfortable consequence is that a business can report a healthy profit and still walk into a wall, because profit and cash don’t move on the same schedule. The report that prevents that walk isn’t the P&L. It’s a forward view of cash.

Why profit and cash come apart

The income statement and the bank balance diverge for entirely ordinary reasons. You recognise revenue when you invoice, but the customer pays sixty days later — profit now, cash later. You buy inventory or fund a project before you sell it — cash out now, profit later. Capital expenditure, loan repayments, advance tax, a GST payment — all real calls on cash that don’t sit on the P&L as expenses at all, or not when they actually hit the bank. The result is that a business can be profitable on paper for months while its cash position quietly tightens, and a backward-looking profit report will reassure right up until the payroll run that can’t be met.

Why thirteen weeks

A quarter, viewed week by week, is the horizon that earns its keep. It’s long enough to see a crunch coming with time to act — a tight week in August spotted in June leaves room to pull a milestone forward or arrange a facility — and short enough to forecast with real granularity rather than smoothed averages. Over thirteen weeks you can name the actual receipts and payments: this customer’s invoice due in week four, payroll in weeks two, six, and ten, the GST outflow in week nine, a milestone collection in week eleven. A twelve-month forecast is a planning instrument built on averages; the thirteen-week view is an operating instrument built on specifics, and it’s the specifics that tell you whether you stay above the line.

Driver-based, not a plug

A cash forecast is only worth as much as what it’s built from. The weak version is a single growth assumption applied to a closing balance — a plug that comforts without informing. The useful version is built from drivers grounded in how the business actually behaves: collection curves derived from the customer’s own payment history rather than their stated terms (a customer who pays in 64 days should be modelled at 64, not 30), known payables with their due dates, payroll on its actual calendar, and statutory outflows entered as confirmed amounts. That last point matters as a discipline — the forecast records the GST and tax due, it doesn’t try to compute tax; the computation is the finance team’s, and the forecast’s job is to place the known outflow on the right week.

Scenarios are where it becomes a decision tool

A single forecast line tells you what you expect. The value is in asking what happens if you’re wrong. What if collections slip 20% across the board? What if the big milestone slips a week? A good cash view lets you hold a base case against a stressed one and see, plainly, whether you breach your cash buffer and when — and if you do, what the options are, ranked: pull a receipt forward, defer a discretionary payment, draw a facility. Scenarios turn the forecast from a prediction you passively receive into a set of decisions you can actively make before the week arrives, not during it.

Honesty about book versus bank

One discipline keeps the whole thing credible: stating the assumption. A forecast built off the books is working from book cash, which isn’t always the same as cleared bank cash on a given day, and a forecast that quietly pretends to be live treasury data oversteps what it can know. Saying so — opening balance as of the last close, this is book-based, here’s the buffer it’s measured against — is what makes the rest trustworthy. The same principle that runs through honest reporting runs through honest forecasting: be explicit about what the number is and isn’t.

What to expect with Datavrn

Datavrn pairs the backward-looking pack with a forward-looking cash view, anchored to the latest close. Collection curves are derived from the business’s own payment history rather than assumed from terms; known payables, payroll, and statutory outflows are placed on the weeks they actually fall; and you can hold a base case against stressed scenarios to see whether — and when — cash crosses your buffer, with alerts when it does. The drivers tie back to the same engagements and invoices you can drill anywhere else in the pack, so the forecast isn’t a separate spreadsheet living its own life — it’s the same truth, looking forward. The judgement about what to do stays yours; the forecast makes sure you see the week coming.