How Personal Loan Interest is Calculated in India

Ever wondered why two people with the same loan amount pay different EMIs? Or why your total repayment is so much more than what you borrowed. 

Whenever you consider getting an instant personal loan, the first thing you want to know is: how much will it cost? The answer lies in how personal loan interest rates are calculated. At My Mudra, we believe that understanding this process can help you borrow smarter and save money.

Here’s how personal loan interest rates are charged in India, with all the key facts you need to know before you click "apply."

What is Personal Loan Interest Rate?

The personal loan interest rate is the percentage at which the lender is charging you for the borrowed funds. It is typically expressed as an annual percentage rate (APR). The interest rate you qualify for is based on your credit score, income, loan amount, and loan term.

For example, as of 2026:

• SBI Personal Loan Interest Rate: 10.30% – 15.30% p.a.
• HDFC Personal Loan Interest Rate: 10.90% – 24.00% p.a.

Other banks offer similar ranges, so always compare before deciding.

How Do Banks Determine Interest on Personal Loans?

Indian banks primarily follow the reducing balance method to determine interest on personal loans. This means interest is charged only on the outstanding principal, not the original loan amount, and it reduces every month as you repay.

Formula for Calculating Interest

The basic formula for calculating interest is:

• Interest = Principal x Interest Rate
• EMI = Principal + Interest

Let's take an example to understand this:

Sunil borrows ₹5,00,000 from a bank. He is borrowing at an interest rate of 12% per annum. He will be repaying it in 5 years, i.e., 60 months.

• Principal = ₹5,00,000
• Principal to be paid each month = ₹5,00,000/60 = ₹8,333.33

The interest rate is 12% per year.

By calculation, first month's interest = ₹5,00,000 x 12/100 x 1/12 = ₹5,000

First month's EMI = ₹13,333.33

So Sunil will have to pay ₹13,333.33 for the first month.

For the following month, the interest will be calculated on the new balance, i.e., ₹5,00,000 - ₹8,333.33 = ₹4,91,666.67.

In the same way, interest will be levied on the new outstanding balance every month which you get by subtracting the monthly principal from the initial loan amount, and thus EMIs will be computed. Over time, the interest part decreases and the principal part increases. That’s the magic of the reducing balance method.

Factors That Affect Personal Loan Interest Rates

Wondering why your friend got a lower rate? Here’s what influences personal loan interest rates in India:

• Credit score: Higher scores mean lower rates
• Income: Higher, stable income = better deals
• Loan amount & tenure: Shorter tenures often mean lower total interest
• Employer & job stability: Working with a reputed company helps
• Existing relationship with the bank: Loyalty can pay off

Comparing Top Bank Rates in 2026

Here’s a quick look at what is the interest rate on quick approval personal loan at leading banks:

Tip: Always check the latest rates before applying.

Personal Loan EMI Calculator: Your Best Friend

Calculating EMIs manually can be confusing. Here’s when a personal loan EMI calculator comes in handy. Simply enter your loan amount, interest rate, and tenure – the calculator will do the math for you.

Benefits of using a calculator:

• Instant EMI and total interest breakdown.
• Helps you compare different lenders.
• Lets you adjust tenure to fit your budget.

Try our Personal Loan EMI Calculator to see how much you’ll pay each month.

How to Calculate Personal Loan Interest Yourself

Want to check the math? Here’s a step-by-step simple interest calculation method:

• Get your loan details: Loan amount, annual interest rate, tenure in months.
• Convert annual interest rate to monthly: Divide by 12 and change to decimal.
• Calculate monthly interest: Multiply your loan balance by your monthly interest rate.
• Calculate total interest: Multiply the monthly interest by the number of months in your loan term.
• Add principal to total interest: Add total interest to the original loan amount to get the total repayment amount.

Example:

• Loan: ₹1,00,000
• Rate: 12% p.a.
• Tenure: 3 years (36 months)
• Monthly rate: 1% (0.01)

Monthly Interest = ₹1,000

Total Interest = ₹36,000

Total Repayment Amount = ₹1,36,000

Pro Tips to Pay Less Interest

• Compare rates before you apply. Even a 1% difference can save thousands.
• Choose shorter tenures if you can afford higher EMIs. Less time = less interest.
• Prepay when possible. Most banks allow part-prepayment, which reduces your outstanding principal and future interest.
• Maintain a strong credit score for better rates.

Conclusion

Understanding how personal loan interest is calculated in India is the first step to borrowing smart. The reducing balance method means your interest outgo changes every month, and using a personal loan EMI calculator can give you a clear picture before you borrow.

At My Mudra, we’re here to help you compare personal loan interest rates, estimate your EMIs, and make confident financial decisions. Take a few minutes to crunch the numbers and choose the best loan for your needs.

Also Read:
- Secured vs Unsecured Personal Loans: Which Is Right for You?
- RBI-Approved Personal Loan Apps in India (2025-26 Guide)