Credit Rating vs Internal Bank Rating

Alongside a company's external credit rating from a SEBI-registered agency, virtually every bank also assigns its own internal credit rating or score to the borrower — a distinct, generally unpublished assessment built on the bank's own methodology, data, and risk appetite, which coexists with, informs, and is informed by, but is never identical to, the external rating.

What an Internal Bank Rating Is

An internal bank rating, sometimes referred to as an internal risk rating or a borrower risk grade, is a credit assessment a bank assigns to a borrower using its own proprietary methodology, developed and calibrated internally based on the bank's own historical lending experience, loss data, and risk management framework. Every Indian bank of any meaningful scale maintains some form of internal rating system, applied to essentially all its corporate borrowers, including many companies too small to have an external rating at all, and even companies that do carry an external rating are still assigned an internal rating by each bank they deal with.

Key Differences in Scale, Methodology, and Purpose

Internal bank rating scales are generally different from the standard external rating scales used by SEBI-registered agencies — a bank might use a numeric scale, an alphanumeric scale distinct from the familiar AAA-to-D external convention, or some other internal grading system entirely — meaning a company generally cannot directly translate its external rating into a specific internal bank grade without understanding that particular bank's own specific mapping or methodology, which is typically not published or shared externally.

The methodology itself also differs meaningfully. While external ratings are built around a broadly standardised framework applied consistently across a wide universe of companies for market-wide comparability, internal bank ratings are calibrated specifically to that bank's own historical default and loss experience within its own portfolio, and are explicitly designed to support the bank's own specific purposes — regulatory capital calculation under the bank's approved approach, pricing, provisioning, and internal portfolio risk management — rather than to provide a broadly comparable, publicly available signal to the wider market the way an external rating is intended to.

How the Two Coexist Within a Bank's Overall Credit Process

For companies that carry both, the external rating and the bank's internal rating operate alongside one another throughout the credit relationship — the external rating, where available, typically serves as one structured input into the bank's internal rating model itself, alongside financial ratios, qualitative factors, the bank's own account conduct data, and other inputs specific to that bank's internal methodology, discussed further in the companion article on why banks look beyond external ratings elsewhere in this pillar. The bank's internal rating, once derived, then drives much of the bank's own internal credit process — approval authority levels required for a given exposure size, provisioning treatment, and internal portfolio reporting — functions the external rating alone does not directly perform within the bank's own systems.

Why the Two Ratings Are Correlated but Rarely Identical

Because both the external rating and a bank's internal rating are ultimately assessing the same underlying company using overlapping financial and qualitative information, the two are generally correlated — a company with a strong external rating typically also receives a favourable internal bank rating, and vice versa — but they are very rarely perfectly aligned in a mechanical, one-to-one sense, for all the reasons discussed above: differing methodologies, differing information sets (the bank's internal rating incorporates its own account conduct data the external agency does not have direct access to), differing update cycles, and the bank's own specific risk appetite and historical loss experience shaping its internal calibration in ways that are unique to that institution.

This means a company can, in practice, hold an identical external rating but receive somewhat different internal ratings from different banks it deals with, reflecting each bank's own distinct internal methodology and relationship-specific information, rather than any inconsistency or error in the external rating itself.

Why This Distinction Matters Practically for Borrowers

Understanding that the internal bank rating exists as a separate, bank-specific assessment helps explain several dynamics companies sometimes find puzzling — why the same external rating can produce somewhat different pricing or terms at different banks, why a bank's internal view can occasionally be more or less favourable than the external rating alone would suggest, and why maintaining a strong relationship and clean account conduct with each individual bank has genuine, independent value beyond simply maintaining a strong external rating, since the bank's own internal rating, which drives much of its actual internal decision-making, is shaped by this bank-specific relationship data in ways the external rating cannot fully replicate.

Illustrative Example

Consider a hypothetical agro-processing company carrying an identical A-category external rating and dealing with two different banks: its long-standing relationship bank of over a decade, and a newer bank it began working with roughly two years ago. At the long-standing relationship bank, the company's internal rating is notably favourable, reflecting over a decade of clean account conduct, consistently accurate financial projections, and proactive communication that the bank's internal model weighs heavily. At the newer bank, the internal rating derived for the same company, while still reasonably favourable given the strong external rating and sound financials, sits at a somewhat more cautious internal grade, reflecting the shorter relationship history and correspondingly thinner bank-specific data available to that institution's internal model — illustrating how two banks can arrive at somewhat different internal assessments of the identical company carrying the identical external rating, without either bank's internal process being in any way flawed or inconsistent.

Frequently Asked Questions

Can a company find out its internal rating at a specific bank?

Generally not the specific internal grade or score itself, since banks typically treat this as proprietary internal information, though a company can ask its relationship manager for general, directional feedback on its standing with that bank.

Does having a good internal bank rating reduce the need for an external rating?

Not entirely, since the external rating serves purposes an internal rating does not — regulatory capital treatment recognised specifically for external ratings, broader market credibility with other lenders or investors, and comparability across the market — that remain valuable even for a company with a strong internal rating at its existing bank.

Are internal bank ratings regulated by RBI in the same way external ratings are regulated by SEBI?

Internal bank rating models operate within RBI's broader supervisory framework for bank risk management and, for banks using more advanced regulatory approaches, are subject to specific RBI approval and validation requirements, though this differs from SEBI's direct regulation of external credit rating agencies as market intermediaries.

Can a company's internal rating at a bank change without its external rating changing?

Yes, since the internal rating incorporates bank-specific data, including account conduct and relationship history, that can evolve independently of, and sometimes ahead of, any change in the external rating.

Talk to FinMen Advisors — for help preparing for a rating exercise, write to marketing@finmen.in or call +91 77387 14680.

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 (such as CRISIL, ICRA, CARE Ratings, India Ratings, Brickwork, Acuite, and Infomerics) based on their own methodologies, policies, and the information available to them at the time of assessment. FinMen Advisors provides preparatory and advisory support to companies undergoing a rating exercise and does not issue, influence, or guarantee any rating outcome. Readers should exercise independent judgement and consult qualified professionals before making business or financial decisions.