What is a credit rating? AAA to D, explained
What is a credit rating? A credit rating is a rating agency's opinion on how likely a borrower, or a specific debt instrument like a bond or an NCD, is to repay on time. It is expressed as a symbol on a scale that runs from AAA at the safest end down to D at the default end. A credit rating compresses a lot of financial analysis into one label about default risk. This guide explains what a credit rating is, how the scale reads, and who assigns it in India. It is not investment advice.
Definition
A credit rating
is a registered agency's opinion on the relative likelihood that a borrower or debt instrument will repay principal and interest on time. In India it runs on a standardised scale from AAA, the highest safety, down to D, default, and is regulated by SEBI. Source: SEBI CRA Regulations, 1999.
How does the AAA to D scale work?
SEBI standardised the rating symbols and their definitions so they read the same across agencies. The long-term scale runs, from safest to weakest: AAA, AA, A, BBB, BB, B, C, and D. AAA signals the highest degree of safety on timely servicing of financial obligations; D means the instrument is in default or expected to be. To add finer gradation, categories from AA to C can carry a plus or minus modifier. Each agency prefixes its own name to the symbol, so you see forms like CRISIL AAA or ICRA AA.
AAA to D
SEBI's standardised long-term credit rating scale, highest safety to default
Source: SEBI standardised rating symbols
Who assigns credit ratings in India?
Only credit rating agencies registered with and regulated by SEBI, under the SEBI (Credit Rating Agencies) Regulations, 1999. As of 2026 the registered agencies include CRISIL, ICRA, CARE Ratings, India Ratings and Research, Acuité Ratings and Research, Brickwork Ratings, and Infomerics Valuation and Rating. A rating for a public debt issue must be disclosed in the offer document, so an investor can see it before deciding.
Why do credit ratings matter for filings?
Ratings are a required part of the disclosure around listed debt. When a company issues an NCD, the SEBI rules require it to obtain a rating from at least one registered agency and publish it. The rating is one input among the terms an investor can read in the offer document, alongside whether the debt is secured and who the debenture trustee is. For how these instruments compare with plain bonds, see NCD vs bond.
What a credit rating does not tell you
A rating is an opinion on default risk, dated to when it was issued or last reviewed. It is not a guarantee, it says nothing about whether the price is fair, and it is not a prompt to act. Ratings can be downgraded, and highly rated instruments have defaulted before. Treat a rating as one sourced, dated data point, the way shareholding disclosures are one data point for equity. Flock reports public filings with every claim sourced and dated. What any of it means for your money is your call to make.
Frequently asked questions
What does a credit rating measure?
A credit rating is a rating agency's opinion on the likelihood that a borrower or a specific debt instrument will repay principal and interest on time. It measures relative default risk, not the price or expected return of the instrument. Source: SEBI CRA Regulations, 1999.
What does the AAA to D scale mean?
AAA marks the highest safety on timely servicing of financial obligations, and the scale steps down through AA, A, BBB, BB, B, and C to D, which means the instrument is in default or expected to default. Categories AA to C can carry a plus or minus modifier. Source: SEBI standardised rating symbols.
Who assigns credit ratings in India?
Credit rating agencies registered with SEBI assign them. As of 2026 the registered agencies include CRISIL, ICRA, CARE Ratings, India Ratings and Research, Acuité, Brickwork Ratings, and Infomerics. They are governed by the SEBI CRA Regulations, 1999. Source: SEBI.
Does a high credit rating guarantee repayment?
No. A rating is an opinion on relative risk, not a guarantee, and ratings can be downgraded if the issuer's position weakens. Even highly rated instruments can default. Ratings are reviewed and can change over the life of the instrument. Source: SEBI CRA Regulations, 1999.
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