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LoansJagat Team

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16 Sep 2025

What is the Interest Rate : Types & How It Affects Borrowing

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Key Takeaways
 

  1. Interest rates show the cost of borrowing money or the reward for saving it.
     
  2. Changes in interest rates affect loans, savings, and overall spending in the economy.
     
  3. Knowing how interest rates work helps you make smarter financial decisions.

An interest rate is the percentage a lender charges on the money you borrow. It is also the amount you earn when you save or invest money.

For example, if you take a loan from a bank, the interest rate tells you how much extra you must repay on top of the borrowed amount. If you save money in a bank account, the interest rate shows how much you will earn over time.

Let’s say you borrow ₹1,00,000 from a bank at an interest rate of 10% per year for 3 years. Here’s how much interest you’ll pay each year:
 

Year

Interest (10%)

Total Repayment (Principal + Interest)

1

₹10,000

₹1,10,000

2

₹10,000

₹1,20,000

3

₹10,000

₹1,30,000


This shows how the interest rate affects the total cost of borrowing. Loan rates can change based on credit score, loan tenure, and market conditions.

Now that we understand how interest rates work in real life, let’s explore what influences them and why they matter for both borrowers and savers.

Why Interest Rates Matter to You and the Indian Economy

Interest rates affect your money more than you may realise. Whether you're saving for your goals or borrowing to start a small business, interest is the amount you either earn or pay on money over time.

Let’s take a different example, imagine you're setting up a small chai stall in Delhi and need a loan of ₹50,000 to buy a cart and supplies. The final amount you repay will depend on the interest rate.
 

Interest Rate

Loan Tenure

Total Interest Paid

Total Repayment

10%

1 year

₹5,000

₹55,000

18%

1 year

₹9,000

₹59,000


This example illustrates that even a seemingly minor variation in interest rates can substantially alter the total repayment amount, highlighting the importance of comprehending how interest functions to make informed borrowing decisions and strategically plan one’s financial commitments.

The difference in interest rates could affect your profits, pricing, or even your ability to break even. That’s why interest rates are not just numbers; they influence your livelihood.

At a macroeconomic level, interest rates serve as a crucial tool for controlling inflation and steering economic growth; when the Reserve Bank of India (RBI) reduces rates, borrowing costs decrease, encouraging business expansion, whereas during periods of rising inflation, the RBI may increase rates to temper spending and stabilise the economy.

Bonus Tip: Always compare loan offers carefully. Even a small difference in interest rates between lenders can save you thousands over time, so shop around and consider both the rate and loan terms before borrowing.

So, whether you're a student, a vendor, or a young professional planning investments, understanding interest rates helps you make confident financial choices because the rate you get today can shape your future tomorrow.

A Closer Look at the Different Types of Interest Rates

Interest rates play a vital role in borrowing and saving. They decide how much extra you pay on loans or earn on savings. Let’s explore the key types of interest rates, how they work, and when you might come across them:
 

Type of Interest Rate

What It Means

When It's Used

Formula (if applicable)

Fixed Interest Rate

This rate stays the same for the entire loan period. Both the lender and borrower agree on it beforehand.

Personal loans, car loans

Not formula-based

Variable Interest Rate

This rate changes with market conditions such as the repo rate or base rate. It may go up or down over time.

Home loans, long-term loans

Not formula-based

Compound Interest Rate

Interest is added on both the principal and the accumulated interest. It increases faster than simple interest.

Used by banks and financial institutions for various loan types

A = P × (1 + rn)nt

Simple Interest Rate

Interest is calculated only on the principal amount. It stays the same each year.

Less common in bank loans, used for quick calculations

I = P × r × t

 

Each type of interest rate affects the total repayment differently, so understanding them helps borrowers make smarter financial choices based on their needs and loan terms.


Bonus Tip: When choosing a loan, always check whether the interest rate is fixed or variable. Fixed rates provide stability and predictable repayments, while variable rates can be cheaper initially but may rise with market changes.

Conclusion

Interest rates affect almost every part of our financial lives, from loans and mortgages to savings and investments. Knowing how they work helps us make smarter decisions and plan for the future.

When interest rates go up, borrowing money becomes more expensive, but your savings grow faster. When rates go down, loans are cheaper, but the returns on savings drop. By keeping track of rate changes, you can manage your money better and be prepared for whatever the economy brings.

FAQ’s

1. Can interest rates affect your monthly budget?
Yes, higher rates increase loan repayments, while lower rates reduce monthly costs.

2. Do all loans have the same interest rate?
No, rates vary depending on the type of loan, your credit score, and the lender.

3. How do interest rates influence investment choices?
Higher rates may make safe options like fixed deposits attractive, while lower rates can push investors toward stocks or bonds.

4. Can interest rates change during the life of a loan?
Yes, variable rates fluctuate with the market, affecting how much you pay over time.

5. Do savings accounts always benefit from higher interest rates?
Not always, because some banks adjust rates slowly or cap returns, so timing and account type matter.
 

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LoansJagat Team

We are a team of writers, editors, and proofreaders with 15+ years of experience in the finance field. We are your personal finance gurus! But, we will explain everything in simplified language. Our aim is to make personal and business finance easier for you. While we help you upgrade your financial knowledge, why don't you read some of our blogs?

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