Post Office 5-Year Time Deposit: How ₹10 Lakh Can Earn About ₹4.5 Lakh in Interest
If you are looking for a relatively stable investment option for five years, the Post Office 5-Year Time Deposit (TD) is one scheme worth understanding. At the current interest rate of 7.5% per annum, a ₹10 lakh investment can generate roughly ₹4.5 lakh in interest over five years, depending on the applicable compounding calculation.
The key point is that this is not a market-linked investment. The return comes from a government small-savings scheme, with the interest rate notified periodically by the government.
India Post currently lists interest rates ranging from 6.9% to 7.5% for its National Savings Time Deposit accounts, with the 5-year TD carrying a 7.5% rate.
Here is how the mathematics works and what investors should know before putting money into the scheme.
How Does ₹10 Lakh Become Around ₹14.5 Lakh?
The 5-year Post Office Time Deposit pays interest at the applicable rate, with interest calculated quarterly and paid annually. For calculation purposes, the 7.5% annual rate is compounded quarterly.
Suppose an investor deposits ₹10 lakh.
At 7.5% per year, the quarterly rate is:
7.5% ÷ 4 = 1.875% per quarter
Over five years, there are 20 quarters.
Using quarterly compounding:
₹10,00,000 × (1 + 0.075/4)²⁰
This works out to approximately ₹14.49 lakh.
That means the interest component is roughly:
₹14.49 lakh − ₹10 lakh = ₹4.49 lakh
So the popular claim of earning around ₹4.5 lakh from ₹10 lakh over five years is broadly consistent with the current 5-year Post Office TD rate.
The exact amount should always be checked against the applicable Post Office rules and rate at the time of investment.
Why the 5-Year Post Office TD Is Getting Attention
The attraction is fairly simple: investors get a fixed-income product without taking direct exposure to equity-market movements.
Unlike stocks or equity mutual funds, the return does not depend on whether the Sensex or Nifty rises or falls.
That makes the product potentially relevant for investors who have a five-year horizon and prioritise predictable fixed-income returns.
It is particularly different from schemes such as the Post Office Monthly Income Scheme, which is designed to provide monthly interest income. The 5-year TD is more focused on a fixed-term deposit structure.
The Interest Rate Is 7.5%, Not 9% or 10%
One common mistake in social-media posts about small-savings schemes is to mix up different Post Office products.
As of the current rates listed by India Post, the 5-year Time Deposit rate is 7.5%. The 1-year, 2-year and 3-year TD rates are lower.
The government reviews small-savings interest rates periodically. The Department of Economic Affairs published the latest small-savings rate revision for the third quarter of FY2026-27 on September 30, 2026.
Therefore, investors should check the rate applicable on the date they actually open the deposit rather than relying on an old article, video or social-media post.
What Happens to the Interest?
The Post Office TD's interest calculation is different from a simple calculation of:
₹10 lakh × 7.5% × 5 years = ₹3.75 lakh
That calculation assumes simple interest.
The actual calculation benefits from quarterly compounding for the deposit, which is why the accumulated interest can be around ₹4.49 lakh rather than ₹3.75 lakh.
This distinction is important for anyone comparing Post Office TD returns with bank fixed deposits or other savings products.
Can You Invest More Than ₹10 Lakh?
Yes. The ₹10 lakh example is simply an easy way to understand the mathematics.
For example, approximately doubling the principal to ₹20 lakh would roughly double the calculated interest, assuming the same 7.5% rate and the same five-year compounding structure.
However, investors should not assume that today's interest rate will necessarily remain available for a new deposit in the future. Small-savings rates are notified by the government and can change for new investments.
The rate applicable to a particular deposit is therefore an important factor when deciding when to invest.
Is It Better Than a Bank FD?
There is no universal answer.
A bank fixed deposit may offer different rates depending on the bank, tenure and customer category. Some banks also provide additional interest to senior citizens.
The Post Office TD should therefore be compared with the specific bank FD available to you rather than with a generic "FD rate."
Investors should compare:
Effective interest rate
Compounding frequency
Tenure
Premature withdrawal conditions
Tax treatment
Liquidity
Deposit concentration
Whether the investment is needed for a specific future expense
A slightly higher headline rate is not necessarily the deciding factor if the money may be required before maturity.
What About Tax?
The interest earned from a Post Office Time Deposit is not automatically tax-free.
The applicable tax treatment depends on the investor's circumstances and prevailing income-tax rules.
The five-year Post Office TD can also qualify for deduction under Section 80C, subject to the conditions and overall limits applicable under the tax regime. Investors should not assume that the entire deposit is deductible or that the tax benefit automatically applies regardless of which tax regime they use.
This means the effective return after tax can be lower than the headline 7.5%.
For a meaningful comparison, investors should calculate the post-tax return, especially if they are already in a higher tax bracket.
Who Should Consider This Scheme?
The five-year Post Office TD may appeal to investors who:
Want a fixed-income investment
Can keep their money invested for five years
Prefer government small-savings products
Do not want direct equity-market exposure
Are building a conservative investment portfolio
Have a known financial goal around the five-year mark
It may be less suitable for someone who needs immediate access to the money or is specifically seeking high long-term capital growth.
There is also an inflation risk. Even when the nominal return is fixed, rising prices can reduce the purchasing power of the money received five years later.
Don't Confuse ₹4.5 Lakh Interest With ₹4.5 Lakh Profit in Cash
The headline needs one important clarification.
If someone says:
"Invest ₹10 lakh and earn ₹4.5 lakh in five years,"
that does not mean the investor receives ₹4.5 lakh as a separate bonus.
The approximate calculation is:
Initial deposit: ₹10,00,000
Approximate maturity value: ₹14,49,000
Approximate interest component: ₹4,49,000
The actual payout mechanics and applicable rules should be checked with India Post when opening the account.
This is why understanding the mathematics is more useful than simply looking at a headline return percentage.
What Investors Should Check Before Investing
Before opening a five-year Post Office TD, check the current interest rate, maturity calculation, premature-withdrawal rules, tax implications and whether the five-year lock-in fits your financial goal.
It is also sensible not to put emergency money into a fixed five-year product. An emergency fund should remain sufficiently liquid so that an unexpected medical expense or other urgent requirement does not force premature withdrawal.
For conservative investors, the bigger question is not simply "How much interest will I earn?" but "Does this investment match when I will need the money?"
Bottom Line
The current 7.5% rate on the Post Office 5-Year Time Deposit can turn a ₹10 lakh deposit into approximately ₹14.49 lakh, implying around ₹4.49 lakh of interest under quarterly compounding. India Post currently lists 7.5% for the five-year TD, while the government periodically reviews small-savings rates.
The scheme can therefore be useful for investors seeking a relatively conservative five-year fixed-income option. But taxes, inflation, liquidity and the rate available when the deposit is opened all matter.
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This article is for informational and educational purposes only and should not be considered investment advice.