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How Personal Loan Interest Rates Are Calculated — Simple Guide for Every Borrower

Illustration showing calculation of personal loan interest rates with EMI chart and credit score meter

How Personal Loan Interest Rates Are Calculated — Simple Guide for Every Borrower

Vizzve Admin

When you apply for a personal loan, one of the biggest factors affecting your EMI is the interest rate. But how do banks and NBFCs decide what rate to offer you?
Unlike home or car loans, personal loans are unsecured, meaning they don’t require collateral — so lenders depend heavily on your financial profile to determine the risk.

Here’s a clear and simple guide to understanding how lenders calculate personal loan interest rates.

1. Your Credit Score Has the Biggest Impact

Your credit score (CIBIL/Experian) signals how trustworthy you are as a borrower.

Higher credit score = lower interest

750+ → Best rates

650–749 → Moderate rates

Below 650 → High rates or loan rejection

A strong credit score reduces lender risk, so they reward you with better pricing.

2. Your Income Level & Stability

Higher and stable income = lower risk for lenders.

They check:

Monthly salary

Type of employer

Work experience

Stability (frequent job changes increase risk)

Government employees, PSU employees, and top MNC workers often get preferential rates.

3. Loan Amount & Tenure Influence the Rate

Loan Amount

Small loans (e.g., ₹50,000 – ₹1 lakh) may have slightly higher rates

Higher loan amounts can get better rates if creditworthiness is strong

Tenure

Shorter tenure → lower total interest, but EMI is higher

Longer tenure → slightly higher interest rate due to increased risk

4. Debt-to-Income Ratio (DTI)

DTI = Total EMIs / Monthly Income

Lower DTI = lower interest rate
Higher DTI = higher rate or rejection

Lenders prefer DTI below 40%.

5. Employer Category Matters

Many lenders classify employers into categories:

Category A: Govt, PSUs, Top MNCs → Lowest interest

Category B: Mid-sized companies → Standard interest

Category C: Small/private firms → Higher interest

This is because stability of income reduces risk.

6. Existing Relationship With the Bank

Banks often give special rates to:

Salary account holders

Long-term customers

Existing loan customers with good repayment history

Pre-approved borrowers

This lowers processing time and cost for the bank, so they offer better pricing.

7. The Formula Lenders Use (Conceptual)

Personal loans usually use reducing balance interest, not flat rate.

EMI Formula

EMI = [P × R × (1+R)^N] / [(1+R)^N − 1]
Where:

P = Loan amount

R = Monthly interest rate

N = Tenure in months

Interest is charged only on the outstanding amount each month.

8. Other Factors That Influence the Rate

Age of the borrower

City of residence

Market interest rate conditions

Reserve Bank of India (RBI) policy stance

Festive or promotional offers

9. Compare Fixed vs. Floating Personal Loan Rates

Though most personal loans have fixed interest rates, some lenders offer floating or hybrid schemes.

Fixed rate: EMI stays the same throughout

Floating rate: EMI may change depending on economic conditions

Fixed rates are more common due to predictability.

10. How to Get the Lowest Interest Rate

✔ Maintain a credit score above 750
✔ Keep credit card utilisation low
✔ Reduce existing EMIs before applying
✔ Choose a shorter tenure
✔ Apply with your salary bank
✔ Avoid frequent loan applications
✔ Compare offers from multiple lenders

Small improvements in your financial profile can significantly reduce the final interest rate.

FAQs

1. What is the average personal loan interest rate in India?

Typically between 10% and 24% per year, depending on your profile and lender.

2. Does a higher salary get you a lower interest rate?

Yes, higher and stable income reduces risk.

3. Why do people with weak credit scores get higher rates?

They are considered higher-risk borrowers.

4. Do banks offer different interest rates to different customers?

Yes — interest rates are not uniform and depend heavily on each borrower’s risk profile.

5. Is personal loan interest calculated on flat or reducing balance?

Most lenders use reducing balance, which is fairer and more transparent.

Published on : 19th November 

Published by : SMITA

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