IOB’s IND AA+ Upgrade: What Actually Drives a Stronger Credit Assessment?

Indian Overseas Bank has received a credit-rating upgrade from India Ratings & Research, with its Long-Term Issuer Rating and Basel III Tier 2 Bonds upgraded to IND AA+/Stable from IND AA on October 5, 2026.

The rating action is interesting not simply because of the higher rating.

It is useful because it demonstrates how several parts of a financial institution's credit profile can work together in a rating assessment.

India Ratings highlighted improvements in asset quality, profitability and capitalisation, while also considering the bank's funding profile and continued support from the Government of India.

For companies studying credit ratings, this provides an important lesson:

A rating assessment is rarely about one financial ratio.

It is about how multiple risks and strengths interact.

Asset quality remains central

For a bank, the quality of its loan book is one of the most important credit considerations.

IOB's reported gross NPA ratio stood at 1.33%, while its net NPA ratio was 0.18%.

The distinction between gross and net asset quality is important.

Gross NPAs indicate the overall level of stressed assets before accounting for provisions.

Net NPAs reflect the residual stressed exposure after provisions.

For a lender, sustained improvement in asset quality can reduce pressure on credit costs and create greater visibility around future earnings.

However, one period of improvement should not automatically be treated as a permanent change.

Rating analysis generally looks at the direction and sustainability of the trend.

Profitability matters because capital must be supported by earnings

IOB's return on assets was reported at 1.41% for Q1 FY27.

For banks, profitability is important because it helps determine the institution's ability to internally generate capital.

A bank can have a strong capital ratio today, but analysts also need to consider whether that position can be maintained as the loan book expands.

This creates an important connection:

Asset quality → credit costs → profitability → internal capital generation

Weak asset quality can increase provisions.

Higher provisions can reduce profitability.

Lower profitability can constrain internal capital generation.

That is why asset quality and profitability are closely connected in bank credit analysis.

Capital adequacy provides the financial buffer

IOB reported a CET1 ratio of 16.88% and an overall capital adequacy ratio of 19.36%.

Capital provides a buffer against unexpected losses.

For a bank, a comfortable capital position can provide greater flexibility to absorb stress while continuing to support credit growth.

But capital ratios should not be viewed in isolation.

The quality of capital, expected balance-sheet growth, risk-weighted assets and future capital requirements all matter.

A bank expanding rapidly may require more capital than one with a slower balance-sheet trajectory.

Therefore, the question is not simply:

“What is the capital ratio today?”

It is:

“Is the capital position adequate relative to the risks and growth the institution is taking on?”

Funding stability is another part of the credit story

A financial institution's liabilities matter as much as its assets.

IOB's retail deposits account for approximately 94% of total deposits, while its CASA ratio was reported at 41.05%.

A granular deposit franchise can provide funding stability.

For lenders, the composition and stability of liabilities can influence liquidity risk and the cost of funds.

This illustrates a broader credit principle.

A company should not present only its assets and earnings when discussing its credit profile.

The funding side of the balance sheet deserves equal attention.

Government support can influence the assessment

The Government of India holds a 92.44% stake in IOB.

India Ratings also considered the bank's systemic importance and continued government support in its assessment.

This is particularly relevant when explaining the difference between standalone credit strength and the potential influence of external support.

For companies that are part of a larger group, promoter or parent support can sometimes be an important consideration.

But support should not be assumed merely because an ownership relationship exists.

The strength, willingness and strategic importance of the relationship are relevant.

What companies can learn from the IOB rating action

Although IOB is a bank, the broader lessons apply to companies preparing for a credit-rating exercise.

1. Do not present financial ratios in isolation

A leverage ratio becomes more meaningful when linked to cash flows, business risk and future obligations.

2. Demonstrate the direction of key metrics

A single year's number provides limited context.

Management should be prepared to explain why the trend has changed and whether the improvement is sustainable.

3. Connect operating performance with financial strength

Revenue growth, profitability and cash generation should tell a consistent story.

4. Explain the liability structure

Funding sources, maturity profiles, interest costs and refinancing requirements can materially affect financial risk.

5. Document external support properly

Where promoter or group support is relevant, companies should be able to demonstrate the relationship through actual financial capacity, track record and strategic importance.

The bigger lesson

IOB's rating action demonstrates why credit analysis cannot be reduced to a single number.

Asset quality, profitability, capitalisation, funding stability and external support can interact to shape the overall assessment.

For companies preparing for a rating exercise, the practical lesson is straightforward.

Do not just present the numbers. Explain the credit story behind them.

A rating discussion becomes more meaningful when management can clearly demonstrate how its business profile, financial performance, liquidity and risk management work together.

Disclaimer: This article is intended for general informational and educational purposes only and does not constitute financial, credit, investment or legal advice. Credit ratings are assigned solely by SEBI-registered Credit Rating Agencies based on their own methodologies, policies and information available to them at the time of assessment. FinMen Advisors provides preparatory and advisory support and does not issue, influence or guarantee any rating outcome.