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// WORKED EXAMPLETHE ARITHMETIC A DECISION RESTS ON

Credit-Impaired (Stage 3): a Worked Example

The customer is still charged the full rate. The bank books less.

BY MICHAEL SHANG · SIXTEEN YEARS IN COMMERCIAL BANKING · UPDATED

// THE SHORT ANSWER

Credit-impaired is the label a bank's accounts put on a loan once the damage is no longer a forecast: something has already happened, a default, a concession granted because the borrower is struggling, an insolvency coming, that cuts what the bank expects to collect. Under IFRS 9's three-stage model the loan is then in stage 3. Two things follow. The loss allowance is a lifetime estimate built from what the bank expects to recover, usually loan by loan; and interest income is counted on the loan's value after that allowance, so the bank's reported income from the loan falls while the customer's bill does not.

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.

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// 01 — WHAT MOVES A LOAN INTO STAGE 3

The standard is IFRS 9 for the UK's IFRS reporters, NZ IFRS 9 in New Zealand and AASB 9 in Australia, and the definition is the same in all three. A loan is credit-impaired when one or more events with a detrimental effect on its expected cash flows have occurred. The standard lists the observable evidence. For a business loan the relevant items are significant financial difficulty of the borrower; a breach of contract such as a default or a payment past due; a concession the lender would not otherwise consider, granted because of that difficulty; and a growing probability of bankruptcy or another financial reorganisation. No single event is required, and several together can be enough.

The standard ties this to the bank's own idea of default. It asks each bank to use a default definition consistent with the one its credit risk management uses, and presumes that default has happened by the time a loan is 90 days past due unless the bank can support a later point. In practice many banks align stage 3 with the default definition their supervisor sets, so a loan that becomes unlikely to pay or reaches 90 days past due usually moves into stage 3 at the same time.

// 02 — HOW THE INTEREST AND THE ALLOWANCE WORK

Gross carrying amount = amortised cost before the allowance
Loss allowance = gross carrying amount
− present value of expected recoveries
(discounted at the loan's original rate)
Amortised cost = gross carrying amount − loss allowance
Stages 1 and 2: interest revenue = effective rate × gross carrying amount
Stage 3: interest revenue = effective rate × amortised cost

The customer's contract does not change. Interest goes on accruing on the account at the contract rate, and the bank goes on asking for it. What changes is the share of it the bank reports as income. Because the allowance is a discounted amount, it grows each period as the discount unwinds, and that growth absorbs the interest the bank charged but did not count. The loan returns to the gross basis only if its credit risk improves so that it is no longer credit-impaired, and the improvement can be linked objectively to an event after the move. When the bank has no reasonable expectation of recovering some or all of the loan, it writes that part off.

// 03 — THE EXAMPLE

A boatbuilder, constructed for this page like every figure in it, owes US$3.0m on a term loan at 9%, with no fees, so the effective rate equals the contract rate. A cancelled order leaves it two quarters in arrears, and the bank defers principal for a year because the business could not otherwise survive. That concession, with the arrears, takes the loan into stage 3. The workout team expects to recover US$1.8m in present value from the yard, the plant and the next order, so the allowance is US$1.2m. The allowance and the rate belong to the example, not to a market norm.

Gross carrying amount 3,000,000
Loss allowance, lifetime (1,200,000)
Amortised cost 1,800,000
Interest revenue for the year at 9%
on the gross basis: 3,000,000 × 9% = 270,000
stage 3, net basis: 1,800,000 × 9% = 162,000
charged, not counted 108,000
A year on, no payments, expectations unchanged
Gross carrying amount 3,000,000 + 270,000 = 3,270,000
Amortised cost 1,800,000 × 1.09 = 1,962,000
Loss allowance 3,270,000 − 1,962,000 = 1,308,000

The allowance rose by US$108,000, exactly the interest charged and not counted, and no new impairment charge was needed because nothing in the bank's expectations had changed. Then the order book recovers and another lender refinances the boatbuilder, repaying US$3.27m in full. The bank receives US$1,308,000 more than the loan's amortised cost. That gain is reported as a reversal of impairment losses, including the US$108,000 of interest left out of income in stage 3, not as interest revenue. The IFRS Interpretations Committee concluded in 2019 that this presentation is required when a credit-impaired loan is cured, which it read as including payment in full, and noted that the reversal can exceed the impairment losses booked over the loan's life, as it does here.

// 04 — HOW IT DIFFERS FROM STAGE 2

Stage 2 also carries a lifetime allowance, so the two are often confused. The tests are different. A loan reaches stage 2 when its credit risk has increased significantly since it was made, a comparison against its own starting point that looks forward. It reaches stage 3 when the loss event has already happened. A stage 2 loan still earns interest on its gross amount; a stage 3 loan earns it on the net amount. The move from 2 to 3 is therefore the point at which the loan's income in the bank's accounts falls, not just its provision.

Leaving stage 3 also runs on a different clock from a supervisor's. IFRS 9 returns a loan to the gross basis when the objective improvement is there, with no minimum period. A probation period for a forborne loan is a prudential rule, which can keep the regulatory label in place after the accounts have moved.

DEFINED IN ONE PARAGRAPH → · PROVISION COVERAGE RATIO → · EXPECTED LOSS, WORKED →

// 05 — WHERE IT DECIDES A FILE

Once a business loan is in stage 3, its allowance is usually an individual estimate, and the estimate is the workout plan in numbers: what the security will fetch, when, and at what cost. Timing counts because the recoveries are discounted. If the boatbuilder's US$1.962m of expected proceeds slipped from one year away to two, their present value at 9% would fall from US$1.8m to about US$1.65m, and the allowance would rise by about US$149,000 with the price unchanged. A slow sale costs the bank in its accounts before it costs anything in cash.

The second effect is on restructuring. A concession granted because the borrower is struggling is itself evidence of impairment, so a credit committee asked to defer principal or cut the rate is choosing between a loan that may survive in stage 3 and an enforcement that crystallises the loss now. Any change to the cash flows that does not end the loan is recalculated at the original rate, and the difference is booked as a modification loss. The third is the bank's own reported numbers, where stage 3 balances and their cover are the first thing an analyst of bank results reads.

WHEN A LOAN GOES BAD → · STAGE 3 BACK TO STAGE 1? THE EXAM QUESTION →

// SOURCES

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

  1. Australian Accounting Standards Board, AASB 9 Financial Instruments, compiled version applying from 1 January 2026 — Appendix A (credit-impaired financial asset), paragraphs 5.4.1 to 5.4.4, B5.5.33 and B5.5.37 — Lists the events that evidence credit impairment, requires interest on amortised cost once a loan becomes credit-impaired and a return to the gross basis on an objective improvement, and measures the allowance at the original effective rate — sections 01, 02 and 05.
  2. IFRS Foundation, Agenda Decision 'Curing of a Credit-impaired Financial Asset (IFRS 9 Financial Instruments)', March 2019 — Concludes that when a credit-impaired asset is cured, including by payment in full, the interest not recognised while it was credit-impaired is presented as a reversal of impairment losses, which may exceed the losses previously recognised — section 03.

// QUESTIONS PEOPLE ASK

What makes a loan credit-impaired under IFRS 9?
Evidence that something has already happened to reduce the cash the bank expects to collect. The standard's examples include significant financial difficulty of the borrower, a default or past-due payment, a concession the lender would not otherwise grant made because of that difficulty, and a likely bankruptcy or financial reorganisation. One event can be enough, or several together. Most banks align the test with their default definition, which the standard presumes is met by 90 days past due unless the bank can support a later point.
Does a borrower still pay full interest on a stage 3 loan?
Yes. Stage 3 is the bank's accounting classification, not a change to the contract, so interest keeps accruing on the customer's account at the agreed rate, and the bank keeps asking for it. What falls is the interest the bank reports as income, which is calculated on the loan net of its loss allowance. Any rate cut or payment holiday the customer receives comes from a negotiated concession, not from the classification.
Can a stage 3 loan move back to stage 2 or stage 1?
Yes, if its credit risk improves so that it is no longer credit-impaired, and the improvement can be tied objectively to an event after it moved, such as the arrears being cleared and the business trading out of difficulty. Interest then goes back to the gross basis. Whether it lands in stage 2 or stage 1 depends on how its credit risk compares with when the loan was made. Supervisors' forbearance rules can keep a separate regulatory label on the loan for longer.
What is the difference between stage 2 and stage 3?
Both carry a lifetime expected loss allowance. Stage 2 is triggered by a significant increase in credit risk since the loan was made, a forward-looking comparison, and interest is still counted on the full loan. Stage 3 needs evidence that a loss event has happened, such as a default or a distressed concession, and interest is then counted on the loan net of its allowance. A stage 2 loan is a worry; a stage 3 loan is a recovery.

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