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Credit Quality, Defaults & Stress Testing

Credit risk sits at the heart of every lending decision. As economic conditions shift — from interest rate volatility to supply-chain disruptions — lenders must constantly reassess the resilience of their portfolios. With business margins still under pressure and economic uncertainty lingering, questions around default rates, write-offs, and non-performing exposures (NPEs) are becoming increasingly important.

In its latest outlook, EY’s Item Club forecasts write-off rates of roughly 0.17% in 2025–2026, implying a relatively benign credit environment. But how realistic is this expectation? And how are lenders preparing for unexpected shocks beneath the surface?

This blog explores default dynamics, stress-testing approaches, early warning indicators, and the broader question of whether current credit risk assumptions are robust enough for the coming business cycle.

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1. Credit Quality Today: A Mixed Picture Beneath the Headline Stability

At the aggregate level, UK SME credit performance has been more resilient than many predicted. Despite the pressures of inflation, wage growth, and higher interest costs, widespread defaults have been contained.

Why credit quality has held up

  • Government-backed schemes (CBILS, Bounce Back) cushioned solvency risks during 2020–2022.
  • Many SMEs deleveraged in 2023–2024 to manage rate rises.
  • Consumer demand held surprisingly firm, supporting revenue for many sectors.
  • Lenders tightened underwriting early, preventing high-risk originations.

But aggregate stability can sometimes mask pockets of vulnerability.

Sectoral pressure points

Some sectors continue to carry elevated default risk:

  • Hospitality & leisure: exposed to wage inflation, energy costs, and fragile consumer confidence.
  • Construction: sensitive to delayed projects, funding pressures, and subcontractor failures.
  • Transport & logistics: impacted by fuel prices and supply-chain volatility.
  • Retail: especially smaller independents struggling with footfall and cost-of-living impacts.

In these segments, non-performing exposures are rising faster than national averages — raising questions about the plausibility of a near-record-low write-off rate in 2025–2026.

2. Are Write-Off Rates of ~0.17% Plausible for 2025–26?

EY’s projected 0.17% write-off rate would represent a low point in the credit cycle. For context, write-offs averaged closer to 0.25–0.35% during stable pre-pandemic years, and much higher in stress episodes.

The optimistic case

A write-off rate near 0.17% could be achievable if:

  • Interest rates stabilise or fall, easing debt-service costs.
  • Economic growth holds steady, maintaining SME revenues.
  • Lenders continue conservative underwriting, preventing marginal cases from entering portfolios.
  • Government policy remains supportive, particularly for investment and productivity.

The cautionary case

Several factors could push write-offs above forecasts:

  • Persistent cost pressures eroding SME margins.
  • Delayed insolvencies as businesses exhaust cash buffers.
  • Sector-specific shock events (e.g., construction failures, retail downturns).
  • Sensitivity to interest-rate expectations if cuts arrive more slowly than markets hope.
  • Refinancing risk for SMEs whose loans mature in a higher-rate environment.

While 0.17% is not impossible, it may underestimate the tail risks embedded in a still-fragile SME economy.

3. How Lenders Stress Test Portfolios Under Macro Risk

Stress testing is now a defining component of modern credit risk management. Lenders evaluate how portfolios behave under adverse scenarios that simulate macroeconomic shocks.

Typical stress-test variables include:

  • Interest rate hikes or delayed cuts
  • Inflation spikes reducing disposable income and raising input costs
  • Supply-chain disruptions extending lead times and creating cash-flow gaps
  • Energy price shocks
  • Sector-specific downturns (retail, construction, hospitality)
  • Labour shortages or wage inflation

Common stress-test frameworks

  1. Mild downside scenario: modest revenue decline, slight cost increases, rising late payments.
  2. Moderate stress scenario: 10–20% revenue shock, margin compression, tightening of trade credit.
  3. Severe stress scenario: simultaneous rate shock, supply-chain friction, and sector-wide deterioration.

Portfolio outputs assessed include:

  • Default probability (PD) movements
  • Loss given default (LGD) increases
  • NPE inflows
  • Capital adequacy impacts
  • Sensitivity of covenant breaches
  • Concentration risks

Sophisticated lenders run both bottom-up stress tests (loan-level) and top-down exercises (portfolio-level macro scenarios).

4. How Lenders Buffer Against Unexpected Shocks

Beyond modelling, lenders build structural resilience through:

✔ Conservative underwriting

More focus on historical profitability, cash conversion, and realistic forecasts.

✔ Sector concentration limits

Restricting exposure to volatile industries.

✔ Larger provisioning buffers

Maintaining forward-looking expected credit loss (ECL) coverage.

✔ Portfolio diversification

Combining asset classes (asset finance, invoice finance, term loans) to stabilise risk.

✔ Stronger documentation and covenants

Including information covenants, liquidity requirements, or DSCR thresholds.

✔ Enhanced borrower monitoring

More frequent data reviews, particularly for SMEs with variable cash-flow cycles.

5. Early Warning Indicators: Spotting Stress Before It Escalates

Emerging risks rarely appear suddenly; they are often preceded by behavioural or operational signals. Lenders increasingly rely on early warning systems to catch deterioration before default occurs.

Key early warning metrics include:

1. Payment behaviour

  • Slower payments to lenders
  • Irregular direct debit patterns
  • Falling invoice payment discipline (via trade credit bureaus)

2. Cash-flow volatility

  • Dips in available cash
  • Increased reliance on overdrafts
  • More frequent short-term funding requests

3. Industry stress

  • Rising insolvency rates in the borrower’s sector
  • Cost volatility (energy, materials, wages)
  • Customer concentration risk — e.g., dependency on one large client

4. Supply-chain disruption

  • Late deliveries
  • Inventory shortages
  • Spike in supplier payment delays

5. Connected defaults and contagion

Defaults often spread across business networks:

  • Subcontractor failure impacting construction projects
  • Retail insolvencies triggering wholesaler write-downs
  • Logistics failures affecting e-commerce revenue
  • Supply-chain insolvencies causing cascading cash-flow gaps

Lenders increasingly map these interdependencies to spot contagion risk early.

6. Looking Ahead: What Credit Risk Means for SMEs in 2025

While the baseline outlook for SME credit quality remains stable, the environment is still uncertain. For SMEs, this means:

✔ Maintaining strong cash-flow discipline

Lenders will overweight cash-flow resilience in credit decisions.

✔ Strengthening financial reporting

Clean, timely accounts and clear explanations of margin movements are critical.

✔ Diversifying suppliers and customers

Reducing dependence on single points of failure.

✔ Preparing for refinancing early

Especially for businesses with loans maturing in 2025–2026.

✔ Communicating proactively with lenders

Open dialogue can prevent temporary stress from becoming a default event.

Conclusion: Stable… But Watch the Underlying Signals

On the surface, SME credit quality heading into 2025 looks notably stable — even optimistic — with forecasts such as EY’s 0.17% write-off rate suggesting calm conditions ahead.

But beneath the aggregate numbers lie real pockets of sectoral stress, margin pressures, and potential contagion channels. Lenders are right to remain cautious, running stress tests and monitoring early warning indicators closely.

The key message is balance: credit performance may remain strong, but the risks are far from gone. The businesses — and lenders — that stay vigilant, diversify risk, and adapt quickly will be best positioned to navigate whatever the next phase of the economic cycle brings.

Jamie Davies
Managing Director

As a founder of multiple businesses, Jamie believes that mindset, discipline and ambition are key drivers for success, both for his businesses and for his clients. 

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