A builder's profit beat budget by US$1.2m. The notes show US$1.5m of warranty provisions from earlier years released back into profit.
Doubtful Debts Provision: a Worked Example
The ledger says what is owed. The provision says what will come.
BY MICHAEL SHANG · SIXTEEN YEARS IN COMMERCIAL BANKING · UPDATED · 6 MIN READ
// THE SHORT ANSWER
A lender reads a borrower's doubtful debts provision as management's own estimate of how much of the debtor ledger will not be collected, and then checks that estimate against the ages of the debts. The provision sits as a deduction from trade receivables, and every change in it passes through profit. Too small a provision overstates both the receivables a lender may be advancing against and the earnings its covenants are tested on. A salon supplies wholesaler with US$4.3m owed to it and a provision of US$60,000 has, on its own history of losses, about US$279,000 it should expect not to collect.
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 07 — Coastline Retail Group. NPAT up 9%. Operating cash flow down 31%. The dividend consent request is on your desk. Your call first, then the senior banker's.
PART OF Credit Analysis for Beginners
// 01 — WHY A LENDER READS IT AGAINST THE LEDGER
Receivables are a promise from customers, and some customers break promises. The provision is the business's judgment of how many will, made at the balance date and charged against the year's profit. A lender cares about it twice. On the balance sheet it decides how much of the debtor ledger is real, which matters to an overdraft or invoice finance line sized against debtors. In the profit and loss account its movement sits inside operating costs, so a provision that shrinks while the ledger ages adds to EBITDA that no customer paid for.
The provision cannot be judged alone. Its meaning comes from the aged debtors report beside it: how much is current, how much is overdue, and by how long. A provision that is small against a young ledger is unremarkable; the same provision against a ledger with a long overdue tail asks a question.
// 02 — HOW THE PROVISION IS BUILT
What the provision is built from depends on the accounts. In accounts prepared under NZ IFRS 9 or AASB 9, the local texts of IFRS 9, trade receivables without a significant financing component carry an allowance for the losses expected over their whole life, and the standard permits a provision matrix as a practical way to estimate it: loss rates by age band, drawn from the business's own history and adjusted for conditions now. UK groups reporting under FRS 102 mostly apply its own impairment rules and provide when there is objective evidence that a loss has occurred, unless they have taken the standard's option to apply IFRS 9 instead; the 2024 periodic review did not bring the expected loss model into those rules. Accounts prepared mainly for tax and the bank, common among owner-managed businesses in all three markets, often provide only for named customers. In New Zealand and Australia part of the reason is tax: a bad debt is generally deductible only once it is both bad and written off, so a general provision earns no deduction.
// 03 — THE EXAMPLE
A wholesaler of hairdressing and beauty supplies, constructed for this page like every figure in it, sells on account to about 900 salons. Its trade debtors are US$4.3m. Its provision is US$60,000, specific to two salons that closed; a year ago it was US$160,000, and no debts were written off in the year. EBITDA is US$2.1m and net debt US$6.0m. Over the last three years it has written off a steady share of each age band, which the lender uses as loss rates.
The wholesaler's ledger has aged while its provision fell. US$600,000 is more than ninety days old, and the business's own record says it collects about half of what passes 120 days. Of the US$219,000 between the two EBITDA figures, US$100,000 is the release that lifted this year's profit; the rest is the charge a matrix would have made. Rebuilt, earnings fall by about a tenth and leverage rises by a third of a turn. The loss rates are the example's, drawn from its own invented history, not a market norm.
// 04 — PROVISION, WRITE-OFF AND CREDIT NOTE
Three entries reduce receivables, and a lender keeps them apart. A provision estimates a loss without giving up the debt; the gross amount is still pursued. A write-off removes a debt judged uncollectable, using any provision already made for it. A credit note reverses part of a sale, for returns, rebates, pricing errors or disputes. The last is the one most often missed: a ledger can carry invoices that customers do not intend to pay because they are waiting for a credit, and no provision covers them because they are not credit losses at all. A lender sees them as dilution, the gap between invoiced and collected, which is why it reads credit notes issued after the balance date and runs debtor verification on the largest balances.
The provision also differs from what a lender itself removes. A borrowing base commonly excludes debts beyond an agreed age altogether, whatever the provision says, so the borrower's estimate and the lender's eligible debtors answer different questions.
DEFINED IN ONE PARAGRAPH → · AGED DEBTORS REPORT → · CROSS-AGEING →
// 05 — WHERE IT DECIDES A FILE
It decides the earnings a lender believes. A year in which EBITDA rose partly because the provision fell is a year whose improvement a lender discounts until it sees the cash collected. In a covenant test the effect is direct, as the example shows, and a borrower close to a leverage level has an incentive to be generous to itself at the year end. A lender that has the aged debtors report every month sees the tail grow before the accounts admit it.
It decides the facility too. Where the overdraft or an invoice finance line is sized on debtors, an understated provision means the lender is advancing against money that will not arrive. The response is not necessarily a smaller facility: a borrower that tightens credit terms, insures its larger accounts or provides properly against the tail gives the lender a ledger it can rely on, and the lender may then advance more against it, not less.
FINANCIAL REPORTING, READ BY A LENDER → · BORROWING BASE CERTIFICATE →
// SOURCES
The documents the statements on this page rest on. Each was opened and checked when cited.
- IFRS Foundation, Post-implementation Review of IFRS 9—Impairment: Feedback analysis—Other matters (IASB Agenda Paper 27C, May 2024) — Under the simplified approach in paragraph 5.5.15 of IFRS 9, lifetime expected credit losses are recognised for trade receivables without a significant financing component, and the approach is widely applied by non-financial entities using a provision matrix as a practical expedient — section 02.
- Inland Revenue (New Zealand), BR Pub 18/07: Income tax and goods and services tax – writing off debts as bad — Inland Revenue's public ruling, issued 29 August 2018 and applying from 1 September 2018, on what amounts to writing off a debt as bad for income tax and GST, one of the conditions on which a New Zealand bad debt deduction depends — section 02 and the third question.
// QUESTIONS PEOPLE ASK
- What is the difference between a provision for doubtful debts and a bad debt written off?
- A provision is an estimate: the business expects some debts not to be paid, deducts that estimate from receivables and charges it to profit, but still holds and chases the debts. A write-off is a decision that a particular debt will not be paid; it is removed from the ledger, usually against any provision already made for it. A debt can be provided for one year and written off the next, and the profit is hit when it is provided for, not again when it is written off.
- How do you calculate a provision for doubtful debts?
- Either debt by debt, by naming the customers unlikely to pay, or across the ledger, by applying a loss rate to the balance in each age band and adding the results. The loss rates come from the business's own history of write-offs, adjusted for conditions at the balance date. Many businesses combine the two: specific provisions for known problems and a matrix for the rest, taking care not to provide twice for the same debt.
- Is a provision for doubtful debts tax deductible?
- In New Zealand and Australia, generally not while it remains a provision. Income tax rules in both allow a deduction for a bad debt when it is bad and has been written off, so the movement in a general provision is added back in the tax computation and deducted later when the debts are written off. The UK applies its own rules to impairment of trade debts, and the treatment depends on the accounting basis, so a tax adviser should confirm it for a particular business.
- Do small businesses have to use the IFRS 9 expected credit loss model?
- Only if their accounts are prepared under IFRS 9 or a standard based on it, such as the New Zealand and Australian equivalents. Many small owner-managed businesses prepare accounts that are not required to follow those standards, and most UK businesses reporting under FRS 102 use its incurred loss approach, though that standard lets them opt into IFRS 9. For a lender the framework matters less than the result: whatever the basis, it compares the provision with the aged debtors report and the business's record of losses.
// NEXT TO IT
- THE ACCOUNTS AND THE AUDIT FILEIntercompany balancesThe group's accounts cancel them; the borrower's accounts keep them.
- THE ACCOUNTS AND THE AUDIT FILEWindow dressing (period-end debt)One good afternoon a year, and eleven months of overdraft.
- THE ACCOUNTS AND THE AUDIT FILECustomer prepayments (deferred income)Cash in the bank, and a promise to deliver against it.
- THE ACCOUNTS AND THE AUDIT FILEPercentage-of-completion revenue (input and output methods)The profit is an estimate until the last claim is paid.
// ON WHOSE DESK
The seats that read this term in an ordinary week. Each page says what the seat is for, who arrives in it, and the shape of the round it runs.
- Transaction bankerSells and structures the plumbing a business runs on — accounts, payments, collections, liquidity and trade finance.
- Personal bankerThe bank's face in a branch or on a phone: everyday accounts, cards, personal lending and the first conversation about a home loan.
- Operations analystRuns the processing every product depends on — payments, onboarding, settlements, servicing — at volume.
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