Old vs New Tax Regime Impact on Fixed Deposit Returns: Detailed Comparison

Posted on Friday, August 14th, 2026 | By Santosh kaushik

Summary

FD interest is taxed under “Income from Other Sources” in both tax regimes, but your post-tax return can differ depending on your slab and available deductions. The old regime may work better if you claim benefits such as Section 80C or 80TTB, while the new regime can be more suitable if you have limited deductions and prefer lower tax rates.

Fixed Deposits (FDs) remain one of the most preferred investment options for individuals seeking stable and predictable returns. While the interest earned on FDs is guaranteed, the actual amount you take home depends on one important factor—taxation.

With India now offering both the old and the new tax regimes, many investors wonder which option results in better post-tax returns from their fixed deposits. The answer depends on your income level, available deductions, and overall financial planning strategy.

This guide explains how fixed deposit interest is taxed in India, the role of TDS, and how your choice of tax regime can affect your FD returns.

How Fixed Deposit Interest Is Taxed in India

Interest earned from a fixed deposit is considered taxable income. Unlike certain tax-free investments, FD interest does not enjoy blanket tax exemption and must be reported while filing your income tax return.

Understanding how this interest is taxed helps investors estimate their actual earnings after tax.

Taxation Under Income from Other Sources

Interest earned on fixed deposits is taxed under the head “Income from Other Sources” under the Income Tax Act.

This means the total interest earned during a financial year is added to your overall taxable income. The tax payable depends on the tax slab applicable to you under your chosen tax regime.

Whether the interest is received at maturity or paid periodically, it remains taxable in the financial year in which it is earned or credited.

TDS on Fixed Deposit Interest Explained

Banks may deduct Tax Deducted at Source (TDS) if the interest earned during a financial year exceeds the threshold prescribed under the Income Tax Act.

It is important to note that TDS deducted on FD is not an additional tax. It is simply tax collected in advance by the bank on behalf of the government.

If your total tax liability is lower than the TDS deducted, you may be eligible to claim a refund while filing your income tax return. Conversely, if your tax liability is higher, you may need to pay the remaining tax.

How FD Interest Is Added to Total Income

Every year, the interest earned on your fixed deposits is added to your total taxable income along with salary, business income, rental income, or any other eligible income.

For example, if your annual salary is ₹9 lakh and your FD interest for the year is ₹40,000, your taxable income becomes ₹9.40 lakh before considering eligible deductions and exemptions under the applicable tax regime.

Key Differences Between Old and New Tax Regime

Both tax regimes tax FD interest, but they differ significantly in terms of deductions and exemptions available to taxpayers.

Tax Slabs and Rate Comparison

The old tax regime generally provides higher tax rates while allowing taxpayers to claim several deductions and exemptions.

The new tax regime offers comparatively lower tax rates but permits only limited deductions and exemptions.

The better option depends on your overall financial profile rather than FD interest alone.

Availability of Deductions and Exemptions

One of the biggest differences between the two tax regimes is the availability of tax-saving deductions.

The old tax regime allows eligible deductions under provisions such as Section 80C and Section 80TTB (where applicable), helping reduce taxable income.

The new tax regime offers fewer opportunities to claim deductions, which may increase the taxable portion of your income depending on your investments.

Default Tax Regime and Switching Rules

The new tax regime is the default option for most taxpayers. However, eligible individuals can choose the old tax regime if it better suits their financial planning and tax-saving strategy, subject to the applicable rules for switching between regimes.

Before making a decision, it is advisable to evaluate your overall income, deductions, and expected tax liability.

Impact of Tax Regime Choice on FD Returns

Although the interest rate offered on an FD remains the same regardless of the tax regime, the post-tax return can vary.

Post-Tax Return Calculation Under Old Regime

Under the old tax regime, taxpayers who claim eligible deductions may reduce their overall taxable income.

For investors who have significant deductions under Section 80C or other applicable provisions, the effective tax payable on total income—including FD interest—may be lower compared to the new regime.

As a result, the post-tax return from fixed deposits may be relatively higher.

FD Return Without Deductions in New Regime

Since the new tax regime provides limited deductions, the taxable income generally remains higher if you have significant tax-saving investments.

Although the regime offers lower tax rates, investors who previously benefited from multiple deductions may find that their effective post-tax FD returns differ from those under the old regime.

Effect of Tax Slab on Net Interest Income

The amount you ultimately retain from your FD interest depends largely on your applicable tax slab.

Investors in higher tax brackets may pay more tax on FD interest than those in lower slabs, regardless of the tax regime chosen.

Therefore, evaluating your expected tax liability is essential before estimating your net FD returns.

FD-Related Deductions Available Under Old Tax Regime

The old tax regime offers several deductions that can benefit eligible FD investors.

Section 80C Tax Saver Fixed Deposit Benefits

Investments made in eligible five-year tax saver fixed deposits qualify for deduction under Section 80C, subject to the overall limit prescribed under the Income Tax Act.

This deduction reduces taxable income, making tax saver FDs an attractive option for investors looking to combine fixed returns with tax savings.

Section 80TTB Deduction for Senior Citizens

Eligible senior citizens may claim deductions under Section 80TTB on interest income from specified deposits, subject to prevailing tax provisions.

This benefit can reduce the taxable portion of interest income for eligible individuals under the old tax regime.

Other Interest Income Tax Relief Options

Apart from tax saver FDs, taxpayers may explore other eligible deductions and tax-saving investments based on their financial goals and applicable tax laws.

Choosing the right combination of investments can improve overall tax efficiency while maintaining a balanced portfolio.

Which Tax Regime Is Better for FD Investors?

There is no universal answer because the better regime depends on each investor’s financial circumstances.

When Old Regime Gives Better Returns

The old tax regime may be more beneficial if you regularly claim deductions under Section 80C, qualify for deductions available to senior citizens, or have other eligible exemptions that substantially reduce your taxable income.

In such cases, your effective post-tax FD returns may be higher despite comparatively higher tax slab rates.

When New Regime May Be More Suitable

The new tax regime may suit individuals who have limited tax-saving investments or prefer a simpler tax structure with fewer deductions.

For such taxpayers, lower tax rates may outweigh the benefits available under the old regime.

Factors to Consider Before Choosing a Regime

Before selecting a tax regime, consider:

• Your annual taxable income
• Eligible deductions and exemptions
• Investment portfolio
• FD interest income
• Long-term financial goals

Comparing your estimated tax liability under both regimes each financial year can help you make an informed decision.

Final Thoughts

Understanding how interest on fixed deposit is taxable is essential for accurately estimating your investment returns. While the interest earned from FDs remains taxable under both tax regimes, the overall post-tax return depends on your applicable tax slab, available deductions, and financial planning strategy.

If you invest in tax saver FDs or claim other eligible deductions, the old tax regime may offer better tax efficiency. On the other hand, investors with minimal deductions may find the new tax regime more suitable.

Before making your investment or tax planning decisions, evaluate your expected income, tax-saving opportunities, and long-term financial goals to maximise the returns from your fixed deposits.

Frequently Asked Questions

1)   Is FD interest taxed differently under the old and new tax regime?

FD interest is taxable under both regimes and is added to your total income. The difference comes from the tax slabs and deductions available under each regime.  

2)   Which tax regime is better for fixed deposit investors?

There is no single better option. The old regime may suit investors with significant deductions, while the new regime may work better for those with fewer tax-saving investments.

3)   Can I claim Section 80C or 80TTB on FDs in the new tax regime?

No, you cannot claim deductions under Section 80C or Section 80TTB for fixed deposits under the new tax regime. These benefits are available under the old regime, while the new regime offers limited deductions and exemptions.

4)   How do I calculate post-tax FD returns under each regime?

Add your FD interest to total taxable income, calculate the tax payable under each regime after applicable deductions, and compare the amount of interest you retain after tax.