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Difference Between Reducing Balance and Flat Rate Interest

Published on Nov 24, 2021Updated on Oct 16, 2023

Difference Between Reducing Balance and Flat Rate Interest

Banks and non-banking financial companies (NBFCs) offer various types of loans to fulfill the monetary needs of the applicants. This form of financial aid could include a personal loan, business loan, home loan, or vehicle loan.

Typically, lenders offer borrowers two kinds of interest rate options – reducing balance rate or a flat rate. A proper understanding of the difference between flat and reducing interest rates can prevent unexpected losses.

What is a Flat Interest Rate?

A flat interest rate is calculated on the full loan amount throughout its tenure. It does not take into account that the principal amount is gradually reduced by the monthly EMIs.

The nominal flat rate that is quoted in the beginning is noticeably lower than the Effective Interest Rate.

Flat Interest Rate Calculation

Some lenders may offer a flat interest rate, which means that the rate of interest on your mortgage loan will remain the same throughout the tenure of the loan. If there is any reduction in interest rates as a result of market changes, the borrower will not be able to benefit from it. The flat rate of interest is calculated based on the lender’s policy and the borrower’s eligibility.

At SMFG India Credit, mortgage loans are offered at floating rates of interest, which means that the interest rate may change over the tenure of the loan. Our mortgage loans are linked to the retail prime lending rate.

Interest payable/instalment = (interest rate p.a.*no. of years*original loan amount)/number of instalments

Imagine a scenario where you have taken a personal loan of Rs. 1, 00,000 for 5 years or 60 months at a flat personal loan interest rate of 10%. You will pay

Rs 100,000 (principal) * 10% (flat rate of interest) * 5 (no. of years) / 60 (no. of interest) = INR 833.33 per month. Adding the principal component, your EMI would be INR 2,500 per month. Thus, you would pay INR 10,000 per year or INR 50,000 as interest for the overall tenure of 5 years.

During the entire repayment tenure, the borrower will end up paying Rs.1, 50, 000 (5*12*2,500).

Must Read: Fixed Interest Rates vs Floating Interest Rates - Which is Better?

Flat Interest Rate Loans Advantages:

Easy to Calculate and Track

It is easy to calculate using the flat rate method. Loan commitments that are made using the flat interest rate are transparent. They can be easily tracked by both parties, the borrower and the lender.

Meets the Financial Needs of Farmers

Many borrowers, especially farmers in developing countries, prefer loans with balloon payment options. This is because flat rate calculations are easier to understand.

In-kind Loan Transactions

The flat rate of interest method has been around since before currency was invented. It is the most popular way to repay a loan amount using regular instalments.

What is Reducing Balance Rate?

An interest rate that is calculated on the outstanding loan amount every month is known as the reducing or diminishing interest rate. In this method, the EMI comprises the principal repayment plus the payable interest on the loan amount that is outstanding.

The outstanding loan amount is reduced after every EMI payment. The interest for the following month is calculated only on the outstanding loan amount.

Reducing Balance Interest Rate Calculation

The reducing balance rate is calculated using the following formula –

Interest payable/installment = Remaining loan amount*Interest rate per installment

Consider the example where a borrower avails a loan of Rs.1,00,000 for 5 years at 10% p.a. reducing balance rate. With every repayment, your EMI amount will reduce. In the first year, you will pay an interest amount of Rs. 9,270. In the second year, the principal amount will be Rs. 83,773 and you will have to pay an interest amount of Rs. 7570.

In the last year, you will have to pay an interest of only Rs. 1,329. With the reducing balance method, the borrower will have to pay a total amount of Rs. 1.27 lakhs as opposed to Rs. 1.5 lacs using the fixed-rate method. At SMFG India Credit, we provide a reducing balance rate of interest, thereby enabling you to repay your loan at the best possible price.

The reducing balance interest method is used to calculate interest payable for personal loans, credit cards, overdraft facilities, property loans, mortgages, and housing. Borrowers pay interest only on the outstanding loan amount.

Reducing Balance Rate Advantage:

The big advantage that borrowers enjoy when they avail themselves a loan with reducing balance rates is that, over time, they have to pay less interest than flat interest rate loans.

Must Read: Factors that Affects Your Personal Loan Interest Rate

Reducing Balance vs Flat Rate Interest:

  • The flat rate is calculated on the loan principal amount. The reducing balance rate method calculates the interest rate monthly on the outstanding loan amount.
  • Reducing balance rates are generally higher than flat interest rates
  • Calculating reducing balance rates manually may be trickier than calculating flat interest rates. However, this issue can be resolved by using our personal loan amortisation calculator.
  • The reducing rate method is generally accepted as a better alternative to the flat rate method.

As is evident, simplicity of calculation and low-interest rates do not necessarily make flat rates beneficial. They can be quite misleading when it comes to repaying large loans.

Say you are looking to apply for a personal loan in India. It is advisable to use a personal loan calculatorto find out the interest charges using either option.

If you still have doubts, you can always visit the SMFG India Credit website to know more. Our products and services are uniquely designed to help you meet your financial needs at the most reasonable rates.

* Please note that this article is for your knowledge only. Loans are disbursed at the sole discretion of SMFG India Credit. Final approval, loan terms, disbursal process, foreclosure charges and foreclosure process will be subject to SMFG India Credit's policy at the time of loan application. If you wish to know more about our products and services, please contact us

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