What is a Fixed Deposit? Everything You Need to Know Before Investing

Written by Sachin Gupta

Published on July 10, 2026 | 13 min read

What is a Fixed Deposit? Everything You Need to Know Before Investing
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Key Takeaways

  • A Fixed Deposit (FD) is a low-risk investment that guarantees a fixed return on an investment for a specified tenure at a predetermined interest rate.
  • The interest earned on a fixed deposit is calculated based on the investment amount, interest rate, tenure period, and compounding frequency.
  • Interest earned on your FDs is subject to income tax as per your income tax slab, and premature withdrawal of the FD may result in a penalty or lower interest payout.

Saving money is important, but growing your wealth alongside saving is even more important. This is where Fixed Deposits (FDs) become a smart investment option. FDs have been a preferred choice among Indians due to their predictable return and capital safety. These features have been key factors driving their popularity among investors.

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A fixed deposit is an investment option in which you invest a lump sum amount with a bank or non-banking financial corporation (NBFC) at a predetermined interest rate for a specific time frame. Whether you are a salaried employee creating an emergency fund, a business owner managing surplus cash, or a retired individual seeking regular returns, an FD can help you achieve your financial goals with minimal risk.

But it is important to understand what a fixed deposit is, how it works, how interest on an FD is calculated, its taxation rules, and more before investing.

What is a Fixed Deposit?

Offered by banks and NBFCs, a fixed deposit is a financial instrument in which you can deposit a lump sum of money at a specific interest rate for a fixed tenure. This is totally different from a savings account, where you can deposit or withdraw money at any time. The amount invested in an FD is locked for the chosen period unless you opt for premature withdrawal.

The biggest benefit of an FD is that the interest rate remains unchanged over the term of the investment, irrespective of changes in market conditions. Fixed deposits are considered one of the safest forms of investment because they offer assured returns with minimal risk of loss to the invested capital. Fixed deposits pay a higher interest rate than a savings account until maturity.

For instance, if an investor invests ₹2,00,000 in a fixed deposit for 3 years at an interest rate of 7% per annum, the interest will continue to be calculated at the predefined interest rate despite any change in interest rate.

How Does a Fixed Deposit Work?

The working process of an FD is very simple:

  • Choose the amount you want to invest.
  • Select the tenure.
  • Lock your money for that duration.
  • The bank or NBFC pays interest based on the predetermined interest rate.
  • At maturity, you receive the principal amount along with interest earned.

The bank interest may be paid:

  • Monthly
  • Quarterly
  • Half Yearly
  • Annually
  • At Maturity

Features of Fixed Deposits

  • Guaranteed Returns: Interest rates are guaranteed at the time of the opening of the FD. This implies that your returns will not be influenced by any market movements throughout the tenure.
  • Flexible Investment Amount: You can start your investment in FD with a very small amount, making it accessible to most investors. There is no upper limit on the investment amount in FD.
  • Flexible Tenure: FD offers flexible investment tenures ranging from 7 days to 10 years. You can choose a duration that best suits your financial goals.
  • Loan Against FD: Many banks allow you to avail of a loan against your FD without breaking the deposit. This helps you meet urgent financial needs while your investment continues to earn interest.
  • Nomination Facility: You can nominate any trusted person as the nominee for the FD amount in the event of any unforeseen incidents. This makes the process hassle-free.
  • Automatic Renewal Facility: Most banks offer an automatic renewal facility, under which your fixed deposit is renewed for the same tenure at the applicable interest rate upon maturity.

Types of Fixed Deposits

  • Regular Fixed Deposits: Regular fixed deposits have a predetermined rate of interest for a fixed tenure. Investors can choose to receive the interest payout monthly, quarterly, half-yearly, annually, or on maturity.
  • Senior Citizen Fixed Deposits: Senior citizen fixed deposits are available exclusively to individuals aged 60 years and above. They earn higher interest than regular fixed deposits and also have flexible tenures.
  • Flexi Fixed Deposits: The flexi fixed deposit is linked to your savings account. The money in your savings account is automatically transferred to the fixed deposit whenever you have excess cash.
  • Cumulative Fixed Deposits: In cumulative FDs, the interest amount is automatically added to the main deposit amount, and it gets paid together with the total amount when it matures. Due to the effect of compounding, they provide better yields and are more appropriate for building long-term wealth.
  • Non-cumulative Fixed Deposits: In non-cumulative fixed deposits, the interest payments are made regularly after a certain interval of time, either monthly, quarterly, half-yearly, or yearly.

How to Calculate Fixed Deposit Interest Rate?

The calculation of fixed deposit interest depends on the FD, whether it offers simple interest or compound interest. However, most banks offer compound interest on FDs. The formula to calculate fixed deposit interest rate is as follows: A= P x (1 + r/n)^ (nt) Where: A= Maturity Amount P= Principal Amount r= Annual interest rate n= Number of times interest is compounded in a year t= Time in years

Let us understand this with a simple example:

  • Investment Amount: ₹5,00,000
  • Interest Rate: 7% Annually
  • Tenure: 5 Years

At the end of 5 years, your maturity amount will be ₹7,07,389. This includes the principal amount of ₹5,00,000 and the interest amount of ₹2,07,389.

However, you don’t need to use the formula manually. You can use any fixed deposit calculator to estimate the FD interest amount.

Benefits of Fixed Deposits

Fixed deposits are one of the most trusted fixed-income investments due to several advantages mentioned below:

  • Safe Investment: Bank fixed deposits are considered one of the safest investment avenues since they are not market-sensitive. This avenue helps you protect your money while providing assured returns.
  • Suitable for All Investors: FDs are easy to understand and do not demand any market-related knowledge from the investors, thus making them apt for all types of investors.
  • Higher Returns Than Savings Accounts: FDs usually yield higher interest than normal savings bank accounts, which helps your money grow at a faster pace. Hence, they are considered ideal investment tools when it comes to getting good returns on your idle money.
  • Flexible Tenure: You have the freedom to invest in FDs for a few days or as long as years, depending on your investment objectives. This feature makes FDs ideal for both short-term and long-term investments.
  • Loan Facility: Most banks provide a facility for availing loans against FD without having to liquidate your investment.
  • Easy to Open: The process to open an FD is quick and hassle-free, with most banks offering online and offline application options.

Risks Associated with Fixed Deposits

Fixed deposits are considered one of the low-risk investments. Despite this, they are exposed to various risks mentioned below:

  • Inflation Risk: In case the inflation rates are higher than the interest rate in your FD, then the actual returns that you are getting from the FD will not be as high as they should be.
  • Premature Withdrawal Penalty: If you withdraw your FD before its maturity, there is always a risk that you might face penalties and get reduced interest rates.
  • Interest Rate Risk: Since the interest rate in an FD is fixed once it is booked until the date of maturity, you cannot capitalise on any rise in the interest rate in the market.
  • Liquidity Constraints: Compared to a savings account, an FD does not provide an option to withdraw money anytime. Withdrawal of money before the maturity date may attract penalties.
  • Reinvestment Risk: Once the FD matures, one may be forced to reinvest the money at lower rates of interest as compared to the previous one.

Taxation Rules for Fixed Deposits

It is important to understand the taxation aspects of fixed deposits before making an investment decision.

Taxability of FD Interest

The interest earned from the fixed deposit is taxable according to the income tax slab of an individual.

TDS on Fixed Deposits

CategoryAnnual Interest ThresholdTDS Rate (With PAN)TDS Rate (Without PAN)
Individuals < 60 years & HUF₹50,00010%20%
Senior Citizens (≥ 60 years)₹1,00,00010%20%
NRIs (NRO Accounts)No Minimum Threshold30% + Surcharge + Cess30% + Surcharge + Cess

Tax Saving Fixed Deposit

Individuals can opt for tax-saving FDs which fall under section 80C, up to an overall limit. Tax saver FD comes with the following conditions:

  • The lock-in period is 5 years.
  • Premature withdrawals are prohibited.
  • Interest on such deposits is taxable.

Note: Tax laws are subject to change; one should always check the prevailing tax rules before investing.

Declaration Through Form 15G and 15H

Eligible individuals may submit the declaration forms to avoid TDS deduction from their interest income.

  • Form 15G: Individuals below 60 years of age with an estimated total taxable income that is lower than the basic exemption limit may file Form 15G to the banks or financial institutions, requesting no TDS deduction from the interest earned during the financial year.
  • Form 15H: Senior citizens (60 years and above) with zero tax liability may submit Form 15H to avoid any TDS deduction from their interest income.

However, filling out these forms does not exempt anyone from paying taxes if their interest income is taxable.

Factors to Consider Before Investing in Fixed Deposits

When you are planning to invest in an FD, there are certain things that you must consider:

  • Compare Different Bank FDs: It is important to compare the interest rates of different banks in order to get the best possible return, since interest rates are different in various banks.
  • Right Tenure: You should select the tenure of the FD considering your financial goals so that you can access money when you need the funds.
  • Premature Withdrawal Rule: It is important to know the conditions associated with premature withdrawal from an FD account.
  • Income Tax: FD interest is subject to income tax deduction according to your income tax slab.
  • Maintain Liquidity: Do not invest all your savings in one FD for a long period of time. Keep some money readily available in case of emergencies.

Also Read: Fixed Deposit vs. Post Office Deposits: Which One is Better?

FD Premature Withdrawal Rule

Even though fixed deposits are supposed to be held until maturity, most banks allow you to withdraw your funds before the maturity date. However, you need to understand some rules and charges before breaking an FD.

Is Premature Withdrawal Possible?

Yes, most banks allow premature withdrawal of regular fixed deposits. However, the terms and conditions for that might vary from one bank/financial institution to another. Special FDs, like tax-saving fixed deposits, come with a 5-year lock-in period and do not allow premature withdrawals e, except in a few circumstances.

Penalty on Premature Withdrawal

Premature closure of a fixed deposit attracts a penalty imposed by the banks. In most cases, the bank will pay interest based on the applicable rate for the actual period the deposit remained invested.

Fixed Deposit vs Recurring Deposit: Key Differences

BasisFixed Deposit (FD)Recurring Deposit (RD)
Investment MethodA lump sum amount is invested at the beginning.A fixed amount is deposited every month.
Suitable ForIndividuals with surplus funds available for immediate investment.Individuals who want to save regularly from their monthly income.
ReturnsInterest is earned on the entire deposited amount from the start.Interest is earned on each monthly instalment from the date it is deposited.
Interest RateGenerally similar to RD rates and fixed for the chosen tenure.Usually offers interest rates comparable to FDs, depending on the bank.
TenureFlexible, typically ranging from 7 days to 10 years.Usually ranges from 6 months to 10 years, depending on the bank.
LiquidityPremature withdrawal is allowed but may attract penalties.Premature closure is also permitted, usually with applicable penalties.
Loan FacilityLoans can often be availed against the FD.Many banks also offer loans against RDs, subject to terms and conditions.
Best ForInvestors seeking guaranteed returns on a one-time investment.Salaried individuals and disciplined savers looking to build wealth gradually.
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Even in today's investment landscape, where many investment options carry higher levels of risk, a fixed deposit (FD) remains one of the simplest, safest, and most dependable forms of investment for investors who want to earn assured interest and a fixed maturity amount. Individuals should review the interest rates, tenure, taxability, and premature withdrawal rules before investing in fixed deposits.

FAQs

What is a fixed deposit?

A Fixed Deposit is a financial product in which you deposit a lump sum amount with a bank or financial institution for a fixed period and earn a guaranteed interest rate.

Is a Fixed Deposit safe?

Yes. Fixed Deposits offered by regulated banks are generally considered among the safest investment options because they provide predictable returns and are not directly affected by stock market movements.

Can I withdraw my FD before maturity?

Yes, most banks allow premature withdrawal. However, a penalty may apply, and the interest paid may be lower than originally agreed.

How to calculate fixed deposit interest?

You can calculate FD interest using the compound interest formula or by using an online FD calculator provided by banks. The maturity amount depends on the investment amount, interest rate, tenure, and compounding frequency.

Is FD interest taxable?

Yes. Interest earned on Fixed Deposits is taxable according to your applicable income tax slab. Banks may also deduct TDS if the interest exceeds the prescribed threshold.

Which is better: Savings Account or Fixed Deposit?

If your goal is to earn higher returns on money that you don't need immediately, a Fixed Deposit is generally a better choice. For daily transactions and instant access to funds, a savings account is more suitable.

About Author

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Sachin Gupta

Senior Sub-Editor

is a seasoned financial writer with over eight years of experience across global markets, including Australia, the UK, and New Zealand. He specialises in simplifying complex financial concepts, making them accessible and engaging for a wide range of readers. When he’s not writing or traveling, he can often be found exploring the mountains, drawing inspiration from the calm and clarity of the outdoors.

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  1. What is a Fixed Deposit? Everything You Need to Know Before Investing