IFRS 9 came along to simplify things, make reporting more transparent, and better reflect the way risks and financial instruments actually work in practice.
Just like
Basel II, IAS 39 was another casualty of the 2008 financial crisis. The old standard couldn't keep up with modern financial instruments and created a dangerous blind spot that contributed to one of the worst economic disasters in recent history.
Think of it this way:
Imagine driving a car with a speedometer that only shows you how fast you were going yesterday, not today. That's essentially what IAS 39 was doing with financial risk: measuring risk based on past events, not future expectations. IFRS 9 came along as the much-needed upgrade, like getting a modern dashboard that actually shows you what's happening right now.
Let's now learn not just what changed, but why it matters for finance professionals.
The Difference Between IFRS 9 and IAS 39
Before we dive further into why one replaced the other, let's get our bearings straight.
IAS 39 (International Accounting Standard 39) was the global standard for recognising and measuring financial instruments from 2001 to 2018. That means it told companies how to record and value things like:
- Loans
- Bonds
- Derivatives
- Other investments
IFRS 9 (International Financial Reporting Standard 9) is its successor, officially taking over in January 2018. While it covers the same territory, it approaches financial reporting with a completely different philosophy.
It was a fundamental overhaul of how the financial world measures and reports risk.
Professionals should treat IAS 39 as a legacy standard used only in narrow circumstances. Training and policy work should now be focused squarely on
IFRS 9 and, increasingly, the new IFRS 9/IFRS 7 amendments shaping the next phase of financial instruments accounting.
The Fatal Flaws of IAS 39
IAS 39 was notoriously difficult to apply. It had lots of classification categories, different rules for different types of instruments, and a hedge accounting system that seemed like it required a PhD in both math and patience.
Even the International Accounting Standards Board (IASB), the body that created it, admitted that
IAS 39 was hard to use. Financial institutions often struggled with their rules, especially during times of crisis when clarity was most needed.
Problem 1: The "Incurred Loss" Model Was Living in the Past
IAS 39 used what's called an "incurred loss" model for loan losses. Sounds technical, but here's what it really meant:
banks could only recognise losses on loans after something bad had already happened.Picture this scenario: You're a bank loan officer, and you can see storm clouds gathering over the housing market. Your gut tells you that many of your mortgage loans are about to go bad. But under IAS 39, you couldn't set aside money for these expected losses until borrowers actually started defaulting.
You were the weather forecaster who could only report rain after you're already soaked.
During the 2008 crisis, this created a devastating "cliff effect." Banks went from reporting healthy loan portfolios one quarter to massive write-offs the next. There was no gradual recognition of building problems, but sudden, massive losses that shocked investors and regulators alike.
Problem 2: Complexity Issues
IAS 39 had
four different categories for classifying financial assets, each with its own accounting rules:
- Held-to-maturity investments
- Loans and receivables
- Available-for-sale financial assets
- Financial assets at fair value through profit or loss
The classification process was so complex that it required teams of specialists to get it right. Worse yet, the categories didn't always reflect how businesses actually managed their investments.
Problem 3: Hedge Accounting Nightmares
If you have ever tried to use hedge accounting under IAS 39, you know the pain. The rules were so restrictive and detailed that many companies gave up trying to use hedge accounting, even when they were legitimately hedging risks.
The documentation requirements alone could fill filing cabinets. Companies needed to prove hedge effectiveness within a narrow 80-125% range, and if they failed this test even once, they'd lose hedge accounting treatment entirely.
Enter IFRS 9: The Game Changer
IFRS 9 redesigned the approach to financial instrument accounting. Here's how it transformed the landscape:
The "Expected Credit Loss" Revolution
The biggest change? IFRS 9 introduced the
Expected Credit Loss (ECL) model. Instead of waiting for losses to actually happen, companies now have to estimate and provide for expected losses from day one.
Going back to our weather forecaster analogy, IFRS 9 is the sophisticated weather radar system that can predict a storm days in advance, allowing you to prepare.
Here's a practical example:
Imagine a bank issuing $100 million in corporate loans in January 2025. Under the old IAS 39 system, even if economic indicators suggested trouble ahead, the bank would report these loans at full value until borrowers actually started missing payments.
Under IFRS 9, Global Bank must immediately assess the expected credit losses over the life of these loans. If economic data suggests a 2% default rate over the next five years, they'd immediately recognise approximately $2 million in expected losses, creating a more accurate picture of the loans' true value.
Simplified Classification: Three Categories Instead of Four
IFRS 9 streamlined asset classification into three categories:
- Amortised cost - for assets held to collect contractual cash flows
- Fair value through other comprehensive income (FVOCI) - for assets held both to collect cash flows and potentially sell
- Fair value through profit or loss (FVTPL) - for everything else
This simplified approach makes classification more intuitive and aligned with how businesses actually manage their financial assets.
Hedge Accounting Made Human
Remember those nightmare-inducing hedge accounting rules from IAS 39? IFRS 9 threw most of them out the window.
The new standard focuses on whether hedge accounting reflects a company's actual risk management strategy, rather than forcing compliance with arbitrary mathematical tests. The 80-125% effectiveness range? Gone. Instead, companies need to demonstrate an "economic relationship" between the hedged item and hedging instrument.
Hedge accounting is still evolvinghowever. In December 2025, the IASB published an Exposure Draft proposing a new
Risk Mitigation Accounting (RMA) model under IFRS 9 and IFRS 7, designed to better reflect how banks manage interest-rate risk dynamically at the portfolio level.
Importantly, the proposals include the withdrawal of IAS 39 entirely, reinforcing that any remaining reliance on IAS 39 hedge accounting is expected to be temporary. The consultation and fieldwork period runs until 31 July 2026, so the direction of travel is clear — even the last pockets of IAS 39 usage are on borrowed time.
Case Study: European Banking During COVID-19
When the COVID-19 pandemic hit in early 2020, IFRS 9's forward-looking approach proved its worth. European banks using IFRS 9 were able to quickly increase their loss provisions based on deteriorating economic forecasts, even before widespread defaults occurred.
Under the old IAS 39 system, banks would have had to wait for actual defaults to materialise before recognising losses, creating a false sense of security for investors and potentially delaying necessary interventions.
The European Banking Authority reported that
EU banks increased their credit loss provisions by over €100 billion in 2020, largely due to IFRS 9's expected loss model allowing them to account for pandemic-related risks proactively.
Key Differences Between IAS 39 and IFRS 9