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// WORKED EXAMPLETHE COUNT A DEFAULT RESTS ON

90 Days Past Due: a Worked Example

The clock starts at the limit, not at a missed payment.

BY MICHAEL SHANG · SIXTEEN YEARS IN COMMERCIAL BANKING · UPDATED

// THE SHORT ANSWER

Ninety days past due is the mechanical trigger in the prudential definition of default. When an amount a business owes its bank has stayed unpaid to the 90-day mark, the bank has to record the borrower as defaulted, even if its credit team expects to be repaid. The second trigger is the bank's own view that the borrower will not pay in full. The UK, Australia and New Zealand all use the 90-day mark but count it differently: whether day 90 or day 91 triggers, how small an amount can start the clock, and whether the arrears must also add up to three months of repayments.

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 — WHY SUPERVISORS FIX THE COUNT

A bank's own view of a struggling borrower tends to be hopeful. Supervisors write a mechanical test beside that judgement, so that a loan which has gone unpaid for three months is counted as defaulted whether or not anyone at the bank agrees. The label moves the loan into the bank's non-performing figures, usually into the credit-impaired stage of its loss accounting, and into a heavier capital charge. In New Zealand, for example, a standardised bank weights the unsecured part of a 90-day past-due non-mortgage loan at 150% where the loss allowance held against it is below 20% of the loan.

In Australia the test for a business borrower is applied to the whole borrower, not facility by facility; the UK and New Zealand's IRB banks do the same outside the retail class, where small-business lending may be assessed facility by facility. One account past the line can then put everything the business owes that bank into default.

// 02 — HOW EACH MARKET COUNTS THE DAYS

The three rulebooks share a skeleton. The days run from the first amount not paid when due and, for an overdraft, from the day the balance went over its advised limit or the bank advised a limit lower than the balance. They differ on the trigger day, on how much must be overdue, and on what else must be true.

UK — CRR article 178; PRA Rulebook, Credit Risk 6.1
default when MORE THAN 90 days past due on a material obligation
material, business lending outside the retail class:
past-due sum above the sterling equivalent of 500 euros
AND above 1% of the obligor's on-balance-sheet exposure
material, retail class: any amount above zero
Australia — APRA APS 220
default when 90 days OR MORE past due
scheduled loans: 90 calendar days since a payment not met in full
AND arrears worth at least 90 days of contractual payments
no money threshold in the standard
New Zealand — RBNZ BPR134 (IRB banks)
default when MORE THAN 90 days past due on a material obligation
counted as 90 calendar days OR as 90 days' worth of payments
standardised banks and disclosure: at least 90 days;
a revolving line counts while continuously outside its limit

The UK and New Zealand IRB wording follows the international capital framework's 'more than 90 days'; Australia's '90 days or more' triggers a day earlier. The UK ignores trivial sums on business lending. Australia's double test means one missed monthly instalment, with every later one paid, does not by itself reach 90 days past due, because the arrears stay at one month's worth. New Zealand's IRB rule lets the bank choose its measure and leaves 'material' to its own policy. Banks watch the 30- and 60-day bands closely for the same reason: the line itself does not move.

// 03 — THE EXAMPLE

A civil contractor, constructed for this page, borrows from one bank on a term loan of US$1.6m, paid monthly and fully up to date, and an overdraft with an advised limit of US$250,000. A council's progress payment arrives late and the overdraft goes to US$282,000. The bank honours the payments, and for three months the balance moves between US$282,000 and US$296,000 without coming back under the limit.

Advised overdraft limit 250,000
Lowest balance over the period 282,000
Smallest excess over the limit 32,000
Owed to the bank 1,600,000 + 282,000 = 1,882,000
Excess ÷ total owed 32,000 ÷ 1,882,000 = 1.7%
Australia: 90th day over the limit → non-performing (default)
NZ standardised: 90th day over the limit → a 90-day past-due asset
UK, NZ IRB: 91st day over the limit → default
Exposure in default, UK / Australia / NZ IRB 1,882,000

No instalment was missed, yet the term loan goes into default with the overdraft, because the test is applied to the borrower (a New Zealand standardised bank classifies only the overdraft). Even counting only the US$32,000 above the limit, the arrears clear both parts of the UK materiality test. Australia's second condition, the 90 days' worth of payments, is written for loans with a repayment schedule; an overdraft has none, and its count runs from the breach of the advised limit.

Change one fact. The overdraft stays inside its limit, but a US$350 fee charged to the term loan goes unpaid for 120 days while every monthly instalment of US$28,000 is met. In the UK, US$350 is below the fixed amount and about 0.02% of the exposure, so the clock does not start. In Australia US$350 is nowhere near 90 days' worth of instalments, so the second test fails. A New Zealand IRB bank applies its own materiality policy. The fee belongs on the arrears report, not in the default count.

// 04 — HOW IT DIFFERS FROM AN EVENT OF DEFAULT

A contractual event of default for non-payment arises under the facility agreement, often after a grace period of a few business days, and gives the bank rights against the borrower. Ninety days past due is a regulatory classification inside the bank: it changes how the bank reports, provides for and holds capital against the loan, not what the contract lets it do. A loan reaches non-performing status through 90 days past due or through unlikeliness to pay, so a loan can be non-performing with every payment made.

The accounting count is separate again. IFRS 9, used in the UK and through equivalent standards in Australia and New Zealand, presumes that credit risk has risen significantly once payments are more than 30 days past due, and that default has happened by the time they are 90 days past due, unless the lender can show otherwise. The prudential count and the accounting presumptions usually point the same way, but different rules set them.

DEFINED IN ONE PARAGRAPH → · UNLIKELINESS TO PAY → · WHEN A LOAN GOES BAD →

// 05 — WHERE IT DECIDES A FILE

In the contractor's file the decision came on the first day, not the ninetieth. An overdraft excess is approved, returned or cleared the day it happens, and the daily limit excess report is where the count first shows. A banker who approves the excess each morning without asking why is starting a clock the credit department will later have to explain. The useful question that first morning is whether the need is temporary, a late receipt with a date attached, or permanent, an overdraft carrying hardcore that belongs in a term product.

Raising the limit takes the balance back inside it and stops the count, which is why an increase granted to a borrower already in difficulty is read as a concession rather than a fix. Supervisors treat such concessions as forbearance, and the probation rules decide how long the label stays. For the borrower, the time to ask for a temporary limit is before the receipt is late, not after the bank has found the excess.

PRODUCT FILE: THE OVERDRAFT → · WHEN YOUR LOAN GOES TO WORKOUT →

// SOURCES

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

  1. Australian Prudential Regulation Authority, Prudential Standard APS 220 Credit Risk Management, in force 1 January 2023 — definitions of 'non-performing' and 'past-due', footnotes 1 and 2 — Sets 90 days or more past due as a default trigger, requires both 90 calendar days and 90 days' worth of payments for scheduled loans, and counts an overdraft from the breach of its advised limit — sections 02 and 03.
  2. UK Capital Requirements Regulation (EU) No 575/2013 as retained in UK law, article 178 — default of an obligor — Defines default as more than 90 days past due on a material credit obligation, applied to the obligor (with a facility-level option for retail), with overdraft days counted from the breach of an advised limit; the materiality amounts themselves are in PRA Rulebook, Credit Risk Part, rule 6.1 — sections 01 to 03.
  3. Reserve Bank of New Zealand, BPR134 IRB Minimum System Requirements, 1 July 2024 — section E2.2, reference definition of default — Defines default for IRB banks as more than 90 days past due on a material obligation, measured as calendar days or as 90 days' worth of payments, with overdrafts past due once an advised limit is breached — sections 02 and 03.

// QUESTIONS PEOPLE ASK

Is 90 days past due the same as default?
It is one of two ways into default under the prudential rules, not the whole definition. A borrower is in default when it passes the 90-day mark on a material amount, or when the bank judges it unlikely to pay in full without the security being sold, whichever comes first. So a loan can default with every payment made, and under the UK's or Australia's second test a small overdue fee can pass 90 days without causing a default.
When does the 90-day count start on an overdraft?
From the day the balance goes over the advised limit, or the day the bank advises a limit lower than the balance already drawn; the UK and Australian rules and New Zealand's IRB rule say so in terms. Australia's standard treats an overdraft with no authorised limit as having a limit of zero, so the count starts with the first drawing, and the UK rule also counts credit drawn without authorisation. An overdraft above its limit for a quarter can therefore default the borrower with every instalment paid.
Does a partial payment stop the 90-day count?
Not on the calendar test as Australia and New Zealand word it: the days run from a payment not met in full, and a part-payment leaves it unmet. What a part-payment can change is the second test. Australia asks whether the total unpaid amounts to at least 90 days of repayments; the UK asks whether the overdue amount clears a small fixed sum and 1% of the exposure. A payment that takes the arrears below those lines can keep a loan out of default while an old instalment stays unpaid.
Can a loan stop being 90 days past due?
The count stops when the arrears are paid or the balance returns inside its limit, but a defaulted loan is not necessarily performing again the next day. Where the bank granted a concession because the borrower was in difficulty, supervisors set probation periods. In Australia a restructured loan must meet its new terms for at least six months before it leaves non-performing status, and in the UK the supervisor points firms to a one-year minimum after a distressed restructuring. Clearing the arrears stops the clock; it does not erase what was recorded.

THE IN-TRAY · ONE MINUTE

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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?

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