Basel III Capital Adequacy: CAIIB Cheat Sheet 2026

Basel III capital adequacy is the single most reliable scoring topic in the CAIIB Bank Financial Management and Risk Management papers, and once you truly understand the capital stack, the numbers almost answer themselves. Every cycle, the examiner returns to the same handful of ratios: how much Common Equity Tier 1 a bank must hold, what sits inside each layer of capital, and how the buffers, leverage and liquidity ratios stack on top. This guide turns that whole framework into one clean, memorable cheat sheet built specifically for the CAIIB aspirant who wants marks, not jargon.

Why Basel III capital adequacy dominates the CAIIB paper

If you have time to master only one BFM topic deeply, make it this one. Basel III capital adequacy threads through the entire syllabus, it repeats in every exam cycle, and the numerics are deterministic, which means there is no ambiguity once you know the figures. Risk Management questions in particular lean heavily on this framework, so a confident grip here can swing your overall score more than almost any other chapter.

The framework exists for a simple reason. After the 2008 global financial crisis, regulators concluded that banks were holding capital that was too thin and too low in quality to absorb real losses. Basel III responded by raising both the quantity and the quality of capital, adding buffers that can be drawn down in a downturn, and introducing liquidity standards so a solvent bank cannot still collapse from a funding run. For a working banker, that story makes the numbers stick far better than rote memorisation.

The Basel III capital stack: six numbers that anchor everything

Capital is arranged in layers, from the highest-quality, loss-absorbing equity at the bottom to subordinated instruments at the top. Each layer carries a minimum expressed as a percentage of Risk-Weighted Assets (RWA). The table below is the heart of the whole topic, using RBI's prudential figures for Indian banks.

Notice that these are RBI India figures, not the original Basel Committee 8%. India's 9% total CRAR is a deliberate act of over-compliance, giving the domestic system an extra cushion. Treat the official numbers above as drawn from RBI's prevailing Master Circular on Basel III Capital Regulations, and always confirm the latest values against the current RBI guidelines before an exam cycle, since the regulator can revise specifics over time.

Buffers on top of the minimum

Above the bare minimums sit additional buffers that absorb stress and dampen the credit cycle. These are favourite exam fodder because candidates routinely confuse where each one belongs.

• Capital Conservation Buffer (CCB) 2.5% — always on and held in CET1. It pushes the effective total requirement from 9% to 11.5%.
• Countercyclical Capital Buffer (CCyB) 0% to 2.5% — switched on by RBI when the credit-to-GDP gap signals overheating, and dialled back in a slowdown. It has generally been kept at 0%; confirm the current setting on the latest RBI release.
• D-SIB surcharge 0.2% to 0.8% — extra CET1 demanded of Domestic Systemically Important Banks. The list of D-SIBs is reviewed periodically by RBI, so check the current notification rather than assuming a fixed set.

The leverage ratio: a non-risk-weighted backstop

Risk weights can be modelled, optimised and, critics argue, gamed. The leverage ratio exists as a blunt, model-free check on that. It is Tier 1 capital divided by total exposure, where exposure captures both on-balance-sheet and off-balance-sheet items.

The minimum is 3.5% for Indian banks, and 4% for D-SIBs. The purpose is simple but powerful: even if a bank's RWA calculation understates its true risk, the leverage ratio caps how large the balance sheet can grow relative to its highest-quality capital. Think of it as a speed limiter that works regardless of how clever the risk model is.

LCR and NSFR: the liquidity twins

Basel III added two liquidity standards because a bank can be perfectly solvent on paper and still fail if it cannot meet cash demands. Both are examinable and both target a floor of 100%.

• Liquidity Coverage Ratio (LCR) 100% — High Quality Liquid Assets divided by Net Cash Outflows over a 30-day stress window. It ensures a bank can survive roughly one month of acute outflows without external help.
• Net Stable Funding Ratio (NSFR) 100% — Available Stable Funding divided by Required Stable Funding over a one-year horizon. It guards against a structural mismatch where long-term assets are funded by flighty short-term money.

The mnemonic that saves marks: LCR is short and sharp (30 days), NSFR is long and structural (one year). Confuse the windows and you will hand the examiner a free wrong answer.

Risk weights worth committing to memory

RWA sits in the denominator of every capital ratio, so the risk weights attached to different exposures matter directly. These are the values the CAIIB paper returns to most often.

• Sovereign (India): 0%
• Sovereign (foreign, rating-dependent): 0% to 150%
• Banks (rating-dependent): 20% to 150%
• Regulatory retail: 75%
• Residential mortgage (LTV under 75%): 35%
• Commercial real estate: 100%
• Unrated corporate (large exposure): 100%, rising to 150% where a long-standing rating gap exists

For a deeper dive into how funding, mismatches and these weights interact on a live balance sheet, our companion guide on ALM in Banks 2026: Asset Liability Management for CAIIB BFM connects the liquidity ratios above to day-to-day treasury practice.

How the three pillars map together

Basel III is not only a set of ratios; it is a supervisory architecture built on three pillars. Examiners love a question that asks which pillar a given activity belongs to.

1. Pillar 1 — Minimum capital requirements. The quantitative core: the capital stack, buffers and risk weights covered above.
2. Pillar 2 — Supervisory review. The Supervisory Review and Evaluation Process (SREP), a bank's own Internal Capital Adequacy Assessment Process (ICAAP), and stress testing.
3. Pillar 3 — Market discipline. Public disclosure that lets investors, analysts and counterparties judge a bank's risk profile for themselves.

Capital adequacy never works in isolation; it sits alongside the recovery and resolution machinery a banker must also know. If you are revising the legal side of risk, pair this with our SARFAESI Act 2002 guide for CAIIB BRBL, since enforcement of security interests directly affects the loss-given-default that capital is meant to absorb. For the primary text, the definitive source is always the regulator: see the Indian Institute of Banking and Finance and the prevailing RBI Master Circular on Basel III.

A simple study plan to lock Basel III in a week

Knowing the framework and recalling it under exam pressure are two different skills. Here is a practical, day-by-day rhythm that consistently works for CAIIB candidates.

1. Day 1-2: Build first-principles intuition. Understand why CET1 is the highest-quality capital and why buffers exist, rather than memorising blindly.
2. Day 3: Memorise the eight-number string and write it from memory five times until it is automatic.
3. Day 4: Drill risk weights and the three pillars with quick recall flashcards.
4. Day 5-6: Attempt full-length mock tests under a timer to convert knowledge into speed.
5. Day 7: Review every mistake and rewrite the cheat sheet one final time on a single sticky note.

Pair this with our CAIIB mock tests for timed practice with bilingual explanations, and use the matching games as 60-second recall drills for ratios and definitions. You will also find the full set of free video lessons on the CAIIB course hub, and the deeper risk syllabus under our Risk Management elective notes. For everything in one place, browse all CAIIB guides and updates.

Common mistakes that cost CAIIB marks

The Basel III questions on the CAIIB paper are rarely difficult in concept; they are designed to catch candidates who half-remember the numbers. Watch for these traps.

• "Tier 1 minimum is 5.5%" — wrong. 5.5% is CET1. Tier 1 (CET1 + AT1) is 7%.
• "CCB can be any Tier 1 capital" — it must be CET1 specifically.
• "NSFR uses a 90-day window" — no, NSFR is one year; the 30-day window belongs to LCR.
• "Tier 2 is unlimited" — Tier 2 is capped at 2% of RWA after deductions.
• "Reverse repo balances never count as liquid assets" — Level 1 HQLA does count toward the LCR.

The night-before memorisation rhythm

The evening before the exam, write this single string on a sticky note and you will have armed yourself against almost every Basel III question the paper can throw:

5.5 / 1.5 / 7 / 2 / 9 / +2.5 = 11.5 / LR 3.5 / LCR 100 / NSFR 100

From these eight numbers you can derive everything: AT1 is 7 minus 5.5, giving 1.5; the CCB-loaded total is 9 plus 2.5, giving 11.5; and the buffers, leverage and liquidity floors all flow from the same line. Because the framework is internally consistent, you are memorising relationships, not a random list.

Frequently asked questions

Is the RBI 9% CRAR mandatory or merely recommended?

It is mandatory for Indian banks. RBI's prudential guidelines override the Basel Committee minimums within India, and 9% is the binding floor. The extra one percentage point above the global 8% reflects a deliberately conservative domestic stance. Always confirm the prevailing figure against the latest RBI Master Circular before relying on it in an exam.

What happens if a bank breaches the Capital Conservation Buffer?

Breaching the CCB triggers automatic restrictions on capital distributions. The bank faces limits on paying dividends, buying back shares and awarding discretionary bonuses until it rebuilds the buffer. This is by design, forcing the bank to conserve capital rather than pay it out during stress.

Is AT1 the same thing as a perpetual bond?

Broadly yes, but with strict conditions. AT1 includes perpetual non-cumulative preference shares and Basel III-compliant perpetual debt that carries loss-absorption clauses. The instrument must have no maturity date and must be able to absorb losses on a going-concern basis to qualify. Ordinary term bonds do not count as AT1.

How is Basel III capital adequacy weighted in the CAIIB exam?

It is one of the highest-yield areas in the Risk Management and BFM papers, frequently accounting for a substantial share of the risk-related questions. Because the numbers are fixed and the concepts repeat, it offers an excellent return on study time. Mastering this cheat sheet is among the most efficient ways to lift your overall CAIIB score.

What is the difference between the leverage ratio and CRAR?

CRAR is risk-weighted: it divides capital by Risk-Weighted Assets, so safer assets demand less capital. The leverage ratio is non-risk-weighted: it divides Tier 1 capital by total exposure regardless of risk. The leverage ratio acts as a simple backstop in case the risk-weighting understates the true size of the balance sheet.

Do LCR and NSFR apply to all banks in India?

The liquidity standards apply as per RBI's framework, with the LCR covering a 30-day stress horizon and the NSFR covering structural funding over one year. Scope and any phase-in arrangements are set by RBI, so check the current guidelines for the exact applicability to a given category of bank. For the CAIIB exam, focus on understanding the 100% floor and the two time horizons.

Bringing it all together

Basel III capital adequacy rewards the candidate who understands the logic and memorises the line. Hold the eight numbers, know which layer each buffer sits in, keep the LCR and NSFR windows straight, and map every activity to its pillar — do that, and you will answer these questions faster and more accurately than most of the room. Lock the cheat sheet, run a few timed mocks, and walk into the CAIIB exam treating Basel III as guaranteed marks rather than a hurdle.

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