How many years FD will Double in Post Office?

How many years FD will Double in Post Office?

Fixed deposits (FDs) are popular investment options that offer stability and assured returns. The Post Office, with its extensive reach and trusted reputation, provides individuals with an accessible avenue for investing in FDs. If you’re considering opening an FD with the Post Office, one common question you may have is: How many years will it take for your investment to double? In this article, we will delve into the factors that determine the doubling period of FDs in Post Office, allowing you to make informed decisions about your investment.

What is Fixed Deposits in Post Office

Post Office Fixed Deposits are a type of time deposit offered by India Post. They provide individuals with a safe investment option backed by the government. Post Office FDs have a fixed tenure and interest rate, making them a popular choice for risk-averse investors.

Factors Affecting the Doubling Period

Several factors influence the doubling period of FDs in Post Office:

  1. Interest Rate: The interest rate offered by the Post Office is a key determinant of the doubling period. Higher interest rates can lead to faster growth and a shorter doubling period, while lower rates may extend the time required for your investment to double.
  2. Compounding Frequency: The frequency at which interest is compounded also affects the doubling period. In the case of Post Office FDs, the interest is compounded annually. This means that the interest earned is added to the principal amount once a year. Higher compounding frequencies, such as quarterly or monthly, can potentially result in a shorter doubling period.
  3. Tenure of the FD: The tenure you choose for your FD in Post Office is another crucial factor. Post Office offers fixed tenures ranging from 1 year to 5 years. Generally, longer tenures tend to provide higher interest rates, which can expedite the doubling process.

Calculating the Doubling Period

To estimate the doubling period of an FD in Post Office, we can apply the Rule of 72, a simple formula used to approximate the time it takes for an investment to double. The formula is as follows:

Doubling Time = 72 / Interest Rate

For instance, if the interest rate offered by the Post Office is 7%, the doubling period would be:

Doubling Time = 72 / 7 = 10.29 years

Therefore, it would take approximately 10.29 years for your investment to double with a 7% interest rate.

It’s important to note that the Rule of 72 provides an approximate estimate and may not account for factors like compounding frequency and fluctuations in interest rates. However, it can serve as a useful starting point for understanding the doubling period of your investment.

Other Considerations and Benefits

While estimating the doubling period is crucial, there are other factors to consider when investing in Post Office FDs:

  1. Tax Benefits: Post Office FDs offer tax benefits under Section 80C of the Income Tax Act. Investments made in a 5-year Fixed Deposit scheme are eligible for deductions up to Rs. 1.5 lakh in a financial year. However, the interest earned is taxable.
  2. Premature Withdrawal: Post Office FDs have a lock-in period, and premature withdrawal may attract penalties. It’s important to carefully consider your investment horizon and liquidity needs before investing.
  3. Safety and Security: The Post Office is a government-backed institution, providing investors with a sense of security and reliability. FDs in Post Office are considered safe investments.
  4. Convenient Accessibility: Post Offices have a wide network across the country, making it convenient for individuals to access and manage their FDs.


Post Office Fixed Deposits offer a reliable and accessible investment option for individuals seeking stability and assured returns. While the exact doubling period of an FD in Post Office depends on factors such as the interest rate, compounding frequency, and tenure, the Rule of 72 can provide a rough estimation. It’s important to consider other factors like tax benefits, premature withdrawal policies, and the safety offered by the Post Office.

Investing in Post Office FDs requires careful evaluation of your financial goals, risk appetite, and liquidity needs. By understanding the doubling period and the associated considerations, you can make well-informed decisions that align with your investment objectives. Remember to conduct thorough research, compare interest rates, and seek professional advice if required. Post Office FDs can serve as a valuable component of your investment portfolio, supporting your financial aspirations and providing stability in uncertain times.

Leave a Comment

fintech long light1

InFinTech is a Educational Blog .




NSK Multiservices Kosbi

NSK Multiservices Near Vitthal Rakhumai Temple, Shedepar Road, Panchshil Square, Deori - 441901

We would like to keep you updated with special notifications. Optionally you can also enter your phone number to receive SMS updates.