How to Calculate and Document Expected Credit Losses Under IFRS 9

General approach versus simplified approach: when each applies

A client hands you a provision matrix with five ageing buckets and loss rates that haven’t changed since 2019. The receivables balance grew 40% in two years. The sector had a wave of insolvencies in the last twelve months. The ECL provision went up by €8K. You know the number is wrong before you open the model. The question is whether the file documents why, and what the correct figure should be.

Under IFRS 9.5.5.1, an entity must recognise a loss allowance for expected credit losses on financial assets measured at amortised cost, lease receivables, contract assets, and loan commitments and financial guarantee contracts not measured at FVTPL, calculated using either the general approach (staging model) or the simplified approach (lifetime ECL from initial recognition).

IFRS 9.5.5.1 through 5.5.20 set out two approaches to measuring expected credit losses. The choice is not optional for all instrument types, and getting the scope wrong invalidates the entire ECL calculation.

The general approach (IFRS 9.5.5.3 through 5.5.11) applies to all financial assets measured at amortised cost and FVOCI debt instruments, except where the simplified approach is elected. It uses a three-stage model. Stage 1 instruments (no significant increase in credit risk since initial recognition) carry a 12-month ECL. Stage 2 instruments (significant increase) and Stage 3 instruments (credit-impaired) carry lifetime ECL. The trigger for moving from Stage 1 to Stage 2 is the assessment under IFRS 9.5.5.9: whether credit risk has increased significantly since initial recognition.

The simplified approach (IFRS 9.5.5.15) is mandatory for trade receivables and contract assets that do not contain a significant financing component under IFRS 15. For trade receivables and contract assets that do contain a significant financing component, and for lease receivables, the entity has an accounting policy choice between the general and simplified approaches. Under the simplified approach, the entity recognises lifetime ECL from day one. There is no staging. No 12-month ECL calculation. No significant increase in credit risk assessment.

For most non-Big 4 audit clients, the simplified approach covers the dominant financial asset on the balance sheet (trade receivables). But if the client also holds intercompany loans, term deposits with maturities beyond 12 months, or debt instruments in FVOCI, those require the general approach regardless of what the entity elects for receivables.

Your first audit step is confirming which approach applies to each class of financial asset. If the client applies the simplified approach to a loan receivable that contains a significant financing component without documenting the accounting policy election, the basis for the ECL calculation is missing.

The general approach: staging, PD, LGD, and EAD

Under the general approach, ECL is calculated as the product of probability of default (PD), loss given default (LGD), and exposure at default (EAD), discounted at the effective interest rate. IFRS 9.5.5.17 requires these to reflect an unbiased and probability-weighted amount, the time value of money, and reasonable and supportable information about past events, current conditions, and forecasts of future economic conditions.

The staging assessment under IFRS 9.5.5.9 is the fulcrum. Stage 1 uses 12-month PD. Stages 2 and 3 use lifetime PD. Getting the staging wrong compounds through every subsequent calculation. IFRS 9.B5.5.9 provides indicators of significant increase, but does not prescribe a single method. Common approaches include:

• A relative PD threshold (for instance, PD at reporting date is more than double the PD at initial recognition)
• 30 days past due as a rebuttable presumption under IFRS 9.5.5.11
• Qualitative overlays based on watch-list status or covenant breaches
• External credit rating downgrades

For entities without internal credit rating models (which describes most clients in the non-Big 4 segment), the 30 days past due presumption under IFRS 9.5.5.11 often serves as the primary staging trigger. The entity can rebut this presumption, but IFRS 9.B5.5.19 requires reasonable and supportable information to do so. “The customer always pays eventually” is not a rebuttal.

PD estimation for smaller entities typically relies on external data. The entity might use sector default rates from a credit rating agency, central bank default statistics, or historical payment data from its own receivables ledger. Whatever the source, IFRS 9.5.5.17(c) requires it to include forward-looking information. A PD based solely on the entity’s historical experience fails this requirement even if the history is long and granular.

LGD represents the percentage of exposure the entity expects to lose if default occurs. For unsecured lending, LGD is often estimated at 40% to 60% based on industry benchmarks. For secured lending, it depends on collateral values and recovery timelines. IFRS 9.B5.5.28 requires the estimate to consider the costs of obtaining and selling collateral.

EAD is the gross carrying amount at the point of default, adjusted for expected drawdowns on undrawn commitments. For a fully drawn term loan, EAD equals the carrying amount. For revolving facilities, EAD includes an estimate of further drawdowns before default (the credit conversion factor).

Intercompany loans

One area that catches non-Big 4 firms: intercompany loans. A parent company that lends €2M to a subsidiary at amortised cost must calculate ECL on that loan under the general approach. The PD of the subsidiary is not zero simply because it’s a group entity. IFRS 9.B5.5.4 requires the assessment to reflect the borrower’s credit risk, not the group relationship. If the subsidiary has negative equity, recurring operating losses, or relies on continued parent funding to meet obligations, those factors affect the PD and staging assessment. Most intercompany loan files either skip the ECL calculation entirely or record a nominal provision with no documented basis for the PD estimate.

For entities with small portfolios of general-approach instruments (one or two term loans, a deposit, perhaps an intercompany receivable), the ECL calculation doesn’t need to be elaborate. But it does need to be documented at the component level. A single working paper that shows “ECL on financial assets: €12K” without separating PD, LGD, and EAD for each instrument will not pass inspection. The components can be simple. A PD sourced from Moody’s default rates for the relevant credit rating, an LGD of 45% based on senior unsecured recovery data, and an EAD equal to the carrying amount produces a documented, defensible figure in under an hour.

The simplified approach: provision matrices for trade receivables

Most non-Big 4 audit files contain an ECL calculation for trade receivables under the simplified approach, typically in the form of a provision matrix. IFRS 9.B5.5.35 describes the provision matrix method: group receivables by shared credit risk characteristics (usually days past due) and apply a loss rate to each group.

Building a defensible provision matrix requires four steps.

First, define the groupings. IFRS 9.B5.5.35 requires groupings based on shared credit risk characteristics, not arbitrary ageing buckets. Days past due is the most common characteristic, but if the entity’s receivables have materially different risk profiles by geography, customer type, or product line, those differences should drive separate matrices or sub-groupings. A Dutch wholesaler selling to both German industrial clients and Greek construction firms cannot defensibly apply the same loss rates to both.

Second, calculate historical loss rates. For each grouping, determine the proportion of receivables that ultimately became uncollectable over a defined lookback period. IFRS 9 does not prescribe the lookback period, but it needs to be long enough to capture a representative range of economic conditions. Two years of benign conditions will understate the loss rate. Five years that include a downturn produces a more balanced estimate.

A practical point on calculating these rates: the loss rate for the “current” bucket is not the write-off rate on invoices that are currently not past due. It’s the ultimate loss rate on invoices that were in the “current” bucket at the measurement date, tracked through to final outcome. If your client issued €10M of invoices in January 2021 that were current at 31 January 2021, and €18K of those invoices were ultimately written off over the following 12 months, the loss rate for the current bucket is 0.18%. The calculation requires vintage analysis, not a simple write-off-to-balance ratio. Most provision matrices that produce implausibly low loss rates for the current bucket are using the wrong denominator.

Third, adjust for current conditions. If the entity’s receivables ageing has deteriorated, or if a major customer is in financial difficulty, the historical rates need adjustment. This is not the forward-looking adjustment (which is separate). This is the current conditions overlay under IFRS 9.5.5.17(c).

Fourth, apply the forward-looking adjustment. This gets its own section below because it’s the step most files either skip or document inadequately.

The ciferi IFRS 9 ECL Calculator automates steps two through four. It takes a receivables ageing schedule and historical write-off data as inputs, calculates loss rates by bucket, and applies a forward-looking overlay based on macroeconomic indicators. The output is an audit-ready provision matrix with documented assumptions at each step.

Forward-looking information: the adjustment most files miss

IFRS 9.5.5.17(c) requires ECL estimates to reflect reasonable and supportable information about past events, current conditions, and forecasts of future economic conditions. IFRS 9.B5.5.52 elaborates: the entity does not need to undertake an exhaustive search for information, but it must consider all reasonable and supportable information that is available without undue cost or effort.

In practice, the forward-looking adjustment is the single most common ECL deficiency in non-Big 4 files. The provision matrix gets built from historical data. The historical loss rates get applied. The forward-looking adjustment either doesn’t appear or consists of a single line: “Management considered forward-looking information and concluded no adjustment was necessary.”

That conclusion might be correct. But IFRS 9.B5.5.52 requires the basis for it to be documented. “No adjustment” is a judgment call, and like every judgment call under IFRS, it needs a rationale.

Defensible forward-looking adjustments for trade receivables typically draw on one or more macroeconomic indicators: GDP growth forecasts, sector-specific insolvency rates, unemployment data, or commodity prices for sector-dependent receivables. The connection between the chosen indicator and the entity’s credit losses needs to be articulated. If the entity sells to the construction sector and the CBS (Dutch Central Bureau of Statistics) forecasts a 12% increase in construction insolvencies, that’s a reasonable basis for increasing loss rates on construction-sector receivables. If the entity sells to hospitals funded by government budgets and the macro outlook is stable, a nil adjustment is defensible provided the reasoning is documented.

IFRS 9.B5.5.50 permits the use of multiple scenarios (probability-weighted) or a single most-likely scenario, provided the information meets the “reasonable and supportable” threshold. For most entities in the non-Big 4 segment, a single scenario with a clearly stated macroeconomic assumption is sufficient. Probability-weighted scenarios are more common for banks and financial institutions.

Worked example: Dekker Bouwmaterialen B.V.

Client scenario: Dekker Bouwmaterialen B.V. is a Dutch building materials distributor with €52M revenue and €8.7M trade receivables at year-end. All receivables are from Dutch construction companies. The entity applies the simplified approach under IFRS 9.5.5.15. Dekker has no other financial assets requiring ECL measurement.

Step 1. Confirm scope and approach

Dekker’s trade receivables do not contain a significant financing component (standard 30-day payment terms). The simplified approach under IFRS 9.5.5.15 is mandatory, not an election. No staging assessment is required.

Step 2. Obtain the receivables ageing and historical write-off data

Dekker provides the ageing: Current €5.4M, 1–30 days €1.8M, 31–60 days €0.9M, 61–90 days €0.4M, over 90 days €0.2M. Historical write-offs over the past five years (2019 through 2023) show the following average loss rates by bucket: Current 0.2%, 1–30 days 0.8%, 31–60 days 2.9%, 61–90 days 7.6%, over 90 days 19.3%.

Step 3. Assess current conditions

Two customers in the 61–90 day bucket (combined €0.15M) are on Dekker’s internal watch list due to delayed payments on prior invoices. No customers in the current or 1–30 day buckets show deterioration beyond normal patterns.

Step 4. Apply forward-looking adjustment

The CBS (Centraal Bureau voor de Statistiek) Q3 2024 data shows a 15% year-on-year increase in construction sector bankruptcies. Dekker’s entire receivables book is construction-sector. Management applied a +1.0% forward-looking overlay to all ageing buckets, increasing the total ECL from €197K (unadjusted) to €284K.

Audit assessment: the directional adjustment is logical (construction insolvencies rising, all receivables are construction-sector). The magnitude (+1.0% flat across buckets) warrants scrutiny. A flat overlay assumes the insolvency trend affects all ageing buckets equally. Receivables already over 90 days past due are more likely to default regardless of the macro trend. A tiered overlay (smaller adjustment for current receivables, larger for overdue) would be more precise, but the flat approach is not unreasonable for a €52M-revenue entity where the total adjustment is €87K.

Step 5. Verify disclosure completeness

Cross-check the ECL calculation against IFRS 7.35F through 35G. The financial statements must disclose the provision matrix methodology, the historical loss rates by bucket, the forward-looking adjustment amount and basis, and the provision movement from opening to closing balance (IFRS 7.35H).

Conclusion: The completed working paper shows a structured ECL assessment from scope confirmation through to disclosure verification. A reviewer sees the IFRS 9 paragraph basis for each step, independently verified loss rates, a documented forward-looking adjustment with an external source, and a cross-reference to IFRS 7 disclosure requirements.

Practical checklist for your current engagement

1. Map every financial asset on the balance sheet to either the general approach or the simplified approach. Confirm the basis for the classification (IFRS 9.5.5.15 for simplified, IFRS 9.5.5.3 for general). If the entity applies the simplified approach to instruments that require an accounting policy election, verify that the election is documented.
2. For simplified approach receivables, obtain the provision matrix and independently recalculate at least one ageing bucket’s loss rate from the write-off register. Agree the lookback period to a range that includes both benign and stressed conditions.
3. Check the forward-looking adjustment. If the client says “no adjustment needed,” ask for the documented rationale per IFRS 9.B5.5.52. If no rationale exists, the ECL is unsupported.
4. For general approach instruments, separately assess the staging criteria (IFRS 9.5.5.9), PD source, LGD assumptions, and EAD calculation. One undocumented component invalidates the ECL figure.
5. Cross-reference the ECL working paper to IFRS 7 disclosure requirements. The ECL model inputs must appear in the financial statements under IFRS 7.35F through 35G, not just in the audit file.
6. Run the client’s receivables data through the ciferi IFRS 9 ECL Calculator as an independent cross-check. If the calculator output differs materially from the client’s provision, investigate the source of the difference before concluding.

Common mistakes

• Using historical loss rates without any forward-looking adjustment. The FRC’s thematic review on IFRS 9 implementation noted that insufficient consideration of forward-looking information was one of the most frequent ECL deficiencies, particularly among entities applying the simplified approach to trade receivables.
• Applying the simplified approach to intercompany loans or other financial assets that require the general approach. IFRS 9.5.5.15 limits the simplified approach to trade receivables and contract assets without a significant financing component (mandatory) and trade receivables, contract assets with a significant financing component, and lease receivables (by election). Anything outside this scope requires staging.

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Further reading and source references

• IFRS 9, Financial Instruments – the primary standard governing recognition, measurement, and impairment of financial instruments including the ECL model.
• IFRS 7, Financial Instruments: Disclosures – the disclosure standard requiring ECL model inputs (IFRS 7.35F through 35G) to appear in the financial statements.
• FRC: Thematic review on IFRS 9 implementation – findings on forward-looking information deficiencies in ECL calculations.