What is Expected Credit Loss?
Expected Credit Loss (ECL) is the impairment model introduced by IFRS 9 Financial Instruments, replacing the incurred loss model under IAS 39. Rather than waiting for a trigger event, entities estimate and provision for credit losses from the moment a financial asset is first recognised.
The model applies to financial assets measured at amortised cost, debt instruments at FVOCI, lease receivables, contract assets under IFRS 15, and loan commitments and financial guarantee contracts not measured at fair value.
ECL is calculated as a probability-weighted estimate of credit losses over the relevant time horizon, discounted to present value. At least three scenarios (base, optimistic, pessimistic) are weighted by probability, and the calculation must incorporate forward-looking information including macroeconomic forecasts. This multi-scenario requirement is where most of the audit complexity sits.
The Three-Stage Model
- Stage 1 (12-month ECL): Credit risk hasn't significantly increased since origination. The entity recognises expected losses from defaults possible within 12 months. Interest revenue is calculated on the gross carrying amount.
- Stage 2 (Lifetime ECL): Triggered when credit risk has "significantly increased" since initial recognition (but the asset isn't yet credit-impaired). Expected losses are recognised over the full remaining life. Interest revenue is still calculated on the gross carrying amount.
- Stage 3 (Lifetime ECL, credit-impaired): Objective evidence of impairment exists (e.g., 90+ days past due, debtor in financial difficulty). Lifetime ECL is recognised, and interest revenue shifts to the net carrying amount (gross minus loss allowance).
Why it matters in practice
Because the ECL model is forward-looking by design, it front-loads loss recognition compared to the old incurred loss approach. That shift is what makes it both more economically sound and harder to audit.
For auditors, ECL is one of the most challenging estimates to audit. The calculation involves multiple inputs (probability of default (PD), loss given default (LGD), exposure at default (EAD)), each requiring significant judgement. The "significant increase in credit risk" threshold between Stage 1 and Stage 2 is a major area of management judgement and audit focus.
Under ISA 540 (Revised), the auditor must evaluate the methods, assumptions, and data used in the ECL model, assess estimation uncertainty, and consider management bias, particularly the temptation to understate provisions. For banks, this often requires specialist credit risk modelling expertise on the audit team.
ECL formula
At its simplest, ECL for a given exposure is calculated as:
ECL = PD × LGD × EAD
Where:
- PD (Probability of Default): the likelihood that the borrower will default within the relevant time horizon (12-month PD for Stage 1, lifetime PD for Stage 2/3).
- LGD (Loss Given Default): the percentage of the exposure that will not be recovered if default occurs, after considering collateral and recovery processes.
- EAD (Exposure at Default): the total amount the entity expects to be owed at the point of default, including drawn amounts and estimated future drawdowns on commitments.
The actual calculation is typically more complex, incorporating multiple forward-looking scenarios, discount rates, and segmentation of the portfolio by risk characteristics.
Key standard references
- IFRS 9.5.5.1–5.5.20: The core ECL requirements, including scope, measurement, and the three-stage model.
- IFRS 9.5.5.9: The "significant increase in credit risk" assessment for Stage 2 transfer.
- IFRS 9.5.5.17: The simplified approach available for trade receivables, contract assets, and lease receivables (always lifetime ECL, no staging).
- IFRS 9.B5.5.1–B5.5.55: Application guidance on measuring expected credit losses, including forward-looking information and reasonable and supportable forecasts.
- IFRS 7.35A–35N: Disclosure requirements for credit risk, including reconciliation of loss allowances by stage.
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Frequently asked questions
What is the difference between the incurred loss model and the ECL model?
Under the old incurred loss model (IAS 39), entities only recognised credit losses when there was objective evidence of impairment. A trigger event had to occur. Under the ECL model (IFRS 9), entities must recognise expected losses from the moment a financial asset is originated, based on probability-weighted forward-looking estimates. This means losses are recognised earlier, reducing the 'too little, too late' problem that was highlighted during the 2008 financial crisis.
What are the three stages of the ECL model?
Stage 1 (12-month ECL): for assets where credit risk has not significantly increased since initial recognition. The entity recognises expected credit losses from default events possible within 12 months. Stage 2 (Lifetime ECL): triggered when credit risk has significantly increased. The entity recognises expected credit losses over the full remaining life. Stage 3 (Lifetime ECL, credit-impaired): for assets where there is objective evidence of impairment. Interest revenue is calculated on the net carrying amount rather than the gross amount.
How does the auditor audit ECL estimates?
ECL estimates are among the most complex accounting estimates auditors encounter. Under ISA 540 (Revised), the auditor must understand the entity's methodology, challenge key assumptions (default rates, loss given default, forward-looking scenarios), test the data inputs, evaluate whether the model is appropriate, and assess management bias. For banks and financial institutions, this often requires the involvement of credit risk modelling specialists.