Skip to content
// WORKED EXAMPLETHE ARITHMETIC A DECISION RESTS ON

13-Week Cash Flow Forecast: a Worked Example

Thirteen columns, one a week, and the week that does not clear.

BY MICHAEL SHANG · SIXTEEN YEARS IN COMMERCIAL BANKING · UPDATED

// THE SHORT ANSWER

A lender asks a struggling borrower for a 13-week cash flow forecast because the question in a workout is not whether the year will be profitable but whether next week's wages can be paid. The forecast takes the coming quarter one week at a time: cash expected in, cash going out by category, and the balance or facility drawing left at each week's end. It is rebuilt every week, with the week just gone replaced by what actually happened. That shows the lender two things: the tightest point ahead, and how far the business's own numbers can be trusted.

BASIS  Practitioner judgment from sixteen years in commercial banking, set out in How Bankers Think (Highbank Press, 2026). Every borrower on this site is a composite constructed for teaching, not a client. The market is mid-market commercial lending as practised in New Zealand and Australia; where a convention differs elsewhere, the page says so.

// MAKE THE CALL

Issue 09 — The Tuesday List. Eight dashboards. Two intensive-care slots. Portfolio triage, Tuesday 8:30am. Your call first, then the senior banker's.

Read the file →

// 01 — WHY A LENDER WANTS WEEKS, NOT MONTHS

Cash in a business under pressure tends to run short in a particular week, not on the last day of a month: the week a payroll, a GST, BAS or VAT payment and a supplier's run fall together, before the customer receipts that would have covered them. A monthly forecast reports the balance on the last day of each month and can show comfortable headroom while the middle of the month runs dry. Weekly columns show the low point, and the low point is what a lender with an overdraft or revolving facility is lending into.

The weekly view also matches how insolvency is tested. In Australia, whether a company is insolvent turns mainly on whether its cash flows will let it pay its debts as and when they fall due, and ASIC's guidance lists overseeing cash-flow budgets and comparing actual results with them among the steps directors may need to take. In the UK, a company that cannot pay its debts as they fall due is deemed unable to pay its debts, and a director who lets it trade on after they knew, or ought to have concluded, that insolvent liquidation or administration could not reasonably be avoided can be ordered to contribute to its assets. In New Zealand, directors must not agree to the company incurring obligations unless they believe on reasonable grounds that it can perform them when required, nor let it trade in a way likely to create a substantial risk of serious loss to creditors. Each makes the forecast the directors' evidence as well as the bank's.

// 02 — HOW THE FORECAST IS BUILT

Opening cash, or facility drawn
+ receipts collections from named debtors, by expected payment week; other inflows
− payments payroll, suppliers, rent, tax, interest, capital spending
= closing cash, or facility drawn
Headroom = facility limit − drawn balance

It is a direct forecast: it follows cash, not profit, and is built from the ledgers rather than the budget. Receipts come from the debtor ledger, customer by customer, with each invoice placed in the week it is likely to be paid, not the week it is due. Payments come from the creditor ledger, the payroll calendar, the tax calendar and the lease schedule. Each week the first column is replaced by actual figures and a new week thirteen is added, and a variance report sets forecast against actual line by line. Each variance worth explaining is classed as timing, cash that has moved to another week, or permanent, cash that will not come or will not be saved. In a standstill or workout, the bank commonly makes weekly delivery an undertaking, and some agreements set a permitted variance, negotiated case by case.

// 03 — THE EXAMPLE

An ice-cream manufacturer, constructed for this page like every figure in it, has moved to its bank's workout team as winter approaches. Its overdraft limit is US$2.5m and US$1.6m is drawn. The first forecast, in US$000:

Receipts Payments Drawn at end Headroom
Opening 1,600 900
Weeks 1–4 1,640 1,520 1,480 1,020
Week 5 380 1,060 2,160 340
Week 6 400 640 2,400 100
Weeks 7–13 3,150 2,710 1,960 540

Week 5 carries a payroll, the sales tax payment and a supplier run; week 6 the quarterly packaging order. A forecast that reported only month-end balances would show neither week. Four weeks later the bank has actual figures:

Weeks 1–4 Forecast Actual Variance
Receipts 1,640 1,470 −170 110 timing: a retailer paid a week late
60 permanent: a cancelled promotion
Payments 1,520 1,500 +20 timing: a freight invoice not yet received
Drawn, end week 4 1,480 1,630 −150
Rolled forward, with both timing items landing in week 5:
Week 6 headroom 100 − 60 = 40

The timing items wash out within a week; the permanent one does not, and it takes the low point from US$100,000 to US$40,000. The bank also learns where the forecasting is weakest: receipts came in 10% below forecast while payments landed almost on it, and the next forecasts are read with that in mind. The responses are the business's to propose and the bank's to accept: deferring part of the packaging order, an instalment arrangement for the tax, which Inland Revenue, the ATO and HMRC each offer on their own terms, or a temporary increase in the limit on conditions.

// 04 — WHAT A LENDER READS BESIDE IT

The 13-week forecast is short-range by design. Beside it a lender reads a longer forecast, usually monthly and integrated with the profit and loss and balance sheet, which tests covenants and whether the business can recover rather than merely survive the quarter. It reads liquidity headroom on the forecast's lowest week, not its last, and asks whether the undrawn facility would remain available if a covenant were breached. Where the bank commissions an independent business review, the reviewer often tests the forecast's assumptions, and a business whose forecasts have been accurate has an easier review.

DEFINED IN ONE PARAGRAPH → · LIQUIDITY HEADROOM → · INDEPENDENT BUSINESS REVIEW →

// 05 — WHERE IT DECIDES A FILE

It decides whether the facility stays open week by week. A workout officer who sees a low point the business can survive, and a variance record that shows forecasts can be trusted, has grounds to keep lending while a restructuring is worked out. A low point below zero with no plan to close it, or forecasts that miss in the same direction week after week, point the other way.

The forecast also marks a line the bank stays behind. The lender reads it, questions it and sets conditions on its facility, but the forecast and the decisions in it belong to the directors. A bank that starts deciding which suppliers are paid risks being treated as a shadow director, which is why the questions are asked and the answers left to management.

WHEN YOUR LOAN GOES TO WORKOUT → · PROBLEM LOANS AND WORKOUT → · EARLY WARNING INDICATORS →

// SOURCES

The documents the statements on this page rest on. Each was opened and checked when cited.

  1. Australian Securities and Investments Commission, Regulatory Guide 217: Duty to prevent insolvent trading — guide for directors, December 2024 — RG 217.22 and RG 217.43(a) — States that insolvency is determined predominantly by a cash-flow test of whether debts can be paid as they fall due, and lists overseeing cash-flow budgets and monitoring actual results against them among directors' activities — section 01.
  2. Insolvency Act 1986 (UK), section 123 — Deems a company unable to pay its debts if it is proved that it cannot pay its debts as they fall due — section 01.
  3. Insolvency Act 1986 (UK), section 214 (wrongful trading) — Allows the court to order a director to contribute where the director knew or ought to have concluded that there was no reasonable prospect of the company avoiding insolvent liquidation or insolvent administration — section 01.

// QUESTIONS PEOPLE ASK

Why is a cash flow forecast 13 weeks long?
Thirteen weeks is a quarter. It is long enough to catch the payments that do not come every week, such as quarterly tax, rent and insurance, and the full cycle of customer payment terms, and short enough to forecast from actual invoices and known commitments rather than estimates. A quarter also matches the time a lender often needs to decide what to do with a business in difficulty.
What is the difference between a 13-week cash flow forecast and a cash flow statement?
A cash flow statement in the annual accounts looks back over a year and usually starts from profit, adjusting for non-cash items and working capital. A 13-week forecast looks forward week by week and lists the actual receipts and payments expected, customer by customer and supplier by supplier. The first explains what happened; the second shows whether the business can pay what it owes in the weeks ahead.
How do you do variance analysis on a 13-week cash flow?
Each week, set the actual receipts and payments against what that week's forecast said, line by line. Explain each material difference and class it as timing, cash that arrived or left in another week and will reverse, or permanent, cash that will not come or a cost that was missed. Roll permanent differences into the remaining weeks. Track cumulative variances as well as weekly ones, since small misses in the same direction add up.
Who prepares the 13-week cash flow in a restructuring?
The business's management, because only they know the customers, suppliers and commitments behind each line. A business without the finance resource often brings in an adviser to build the first version and the weekly routine. The lender reviews it and may have its own accountant test it, but it does not prepare it: the forecast is the directors' statement of what the business expects, and they remain responsible for the decisions it reflects.

THE IN-TRAY · ONE MINUTE

Make the call on one file.

A short file on the ground this page covers. Every option opens with how far it sits from a senior banker’s read.

THE NUMBER · THE BANK · ASSET QUALITY

A bank's annual report gives three figures for its loan book.

Gross loans
US$10bn
Non-performing loans
US$300m
Provisions held
US$180m

What is its provision coverage of non-performing loans?

1 FILES · PICK A CALL ON ANY OF THEM

5 MORE ON THE BANK · ASSET QUALITY →WHERE DO YOU READ FROM? THE PLACEMENT →