Published Jun 6, 2026 4 Min Read

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Introduction

The interest rate gap shows whether a bank has more rate-sensitive assets or more rate-sensitive liabilities in a given time period. It is a key tool used in banking to measure earnings sensitivity to changing interest rates.

  • Interest rate gap formula: Rate-Sensitive Assets (RSA) − Rate-Sensitive Liabilities (RSL)
  • A positive gap means RSA is greater than RSL.
  • A negative gap means RSL is greater than RSA.
  • Banks use gap analysis banking techniques to estimate how interest rate changes may affect net interest income.
  • The analysis focuses on assets and liabilities that can be repriced within a specified time bucket, such as 30 days, 90 days, or one year.
  • Interest rate gap analysis measures short-term earnings sensitivity but does not capture all forms of interest rate risk.

Understanding the interest rate gap can help you learn how banks manage interest rate risk and evaluate the potential impact of changing market rates on profitability.

What is the interest rate gap?

The interest rate gap is the difference between a financial institution's rate-sensitive assets and rate-sensitive liabilities over a specific period.

Rate-sensitive assets are assets whose interest rates can change or be repriced within the selected time frame. Examples include floating-rate loans and short-term investments.

Rate-sensitive liabilities are liabilities whose interest costs can change within the same period. Examples include variable-rate deposits and short-term borrowings.

The interest rate gap meaning can be expressed as:

  • Positive when assets exceed liabilities
  • Negative when liabilities exceed assets
  • Zero when assets and liabilities are equal

Banks use this measure to understand how changes in market interest rates may affect their net interest income.

How is the interest rate gap calculated?

The interest rate gap formula is straightforward:

ComponentFormula
Interest Rate GapRate-Sensitive Assets − Rate-Sensitive Liabilities

Example calculation

Assume a bank has:

ItemAmount
Rate-sensitive assetsRs. 500 crore
Rate-sensitive liabilitiesRs. 400 crore

Interest Rate Gap = Rs. 500 crore − Rs. 400 crore

Interest Rate Gap = +Rs. 100 crore

This indicates a positive gap because rate-sensitive assets are greater than rate-sensitive liabilities.

If the liabilities were Rs. 600 crore instead, the gap would be:

Rs. 500 crore − Rs. 600 crore = −Rs. 100 crore

This would represent a negative gap.

Which type of interest rate gap exists?

Interest rate gaps are generally classified into three types.

Gap typeMeaningPossible effect when rates rise
Positive gapRSA > RSLNet interest income may increase
Negative gapRSA < RSLNet interest income may decrease
Zero gapRSA = RSLLimited immediate impact on earnings

Positive gap

A positive gap occurs when rate-sensitive assets exceed rate-sensitive liabilities.

If market interest rates increase, income from assets may rise faster than funding costs. This can improve net interest income.

Negative gap

A negative gap occurs when rate-sensitive liabilities exceed rate-sensitive assets.

When interest rates rise, funding costs may increase more quickly than asset income, which can reduce earnings.

Zero gap

A zero gap exists when rate-sensitive assets and liabilities are equal within the chosen time period.

In this situation, changes in interest rates may have a smaller immediate effect on net interest income.

Who uses the interest rate gap?

Interest rate gap analysis is mainly used by financial institutions and banking professionals.

Common users include:

  • Commercial banks
  • Investment banks
  • Credit unions
  • Treasury departments
  • Asset-liability management (ALM) teams
  • Financial regulators and analysts

These users monitor the relationship between assets and liabilities to manage earnings stability and interest rate exposure.

What are the limitations of interest rate gap analysis?

Although useful, interest rate gap analysis has several limitations.

LimitationExplanation
Timing assumptionsAssets and liabilities may not reprice exactly when expected.
Ignores market value effectsFocuses mainly on earnings rather than changes in asset values.
Repricing mismatchAssets and liabilities may react differently to rate changes.
Time-bucket sensitivityResults can vary depending on the chosen measurement period.
Simplified approachDoes not capture all dimensions of interest rate risk.

Because of these limitations, banks often use additional asset-liability management techniques alongside gap analysis.

What is the difference between interest rate gap and earnings sensitivity?

Both concepts are related but not identical.

FactorInterest Rate GapEarnings Sensitivity
DefinitionDifference between RSA and RSLChange in earnings caused by interest rate movements
PurposeMeasure exposureEstimate earnings impact
FocusBalance sheet structureProfitability changes
OutputPositive, negative, or zero gapIncrease or decrease in earnings

The interest rate gap is an input used to assess earnings sensitivity. Earnings sensitivity estimates how much net interest income could change when interest rates move.

Conclusion

The interest rate gap is an important banking measure used to assess exposure to interest rate changes. It compares rate-sensitive assets with rate-sensitive liabilities and helps institutions evaluate potential effects on net interest income.

While a positive gap may benefit from rising interest rates and a negative gap may face pressure, the actual outcome depends on the size of the gap, repricing behaviour, and market conditions. For this reason, banks typically combine interest rate gap analysis with other risk management tools to gain a more complete view of interest rate risk.

Frequently asked questions

What is the interest rate gap?

The interest rate gap is the difference between rate-sensitive assets and rate-sensitive liabilities within a specific time period. It is calculated using the interest rate gap formula: Rate-Sensitive Assets minus Rate-Sensitive Liabilities. Banks use interest rate gap analysis to understand how changes in market interest rates may affect net interest income and earnings.

What is the interest rate gap model?

The interest rate gap model is a banking risk management framework that compares rate-sensitive assets and rate-sensitive liabilities across different time buckets. The model helps institutions estimate whether rising or falling interest rates may increase or decrease earnings. It is widely used in asset-liability management (ALM) and interest rate risk assessment.

Is broken period interest the same as gap interest?

No. Broken period interest and gap interest are different concepts. Broken period interest refers to interest accrued between two dates that do not cover a complete interest period, such as during a loan transfer or bond transaction. Interest rate gap analysis, on the other hand, measures the mismatch between rate-sensitive assets and liabilities to assess interest rate risk.

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