Many taxpayers expect to receive the full income tax refund they calculate while filing their Income Tax Return (ITR). However, after the return is processed, the amount credited to the bank account may sometimes be lower than the refund originally claimed.

This usually happens because the Income Tax Department verifies the information provided in the return against its own records before issuing the refund. If any mismatch or adjustment is identified, the final refund amount may be reduced.

Here's a closer look at the most common reasons why your income tax refund may be lower than expected and what you can do if you believe an error has occurred.

Why Your Refund Amount May Change

When an ITR is processed, the Income Tax Department compares the information submitted by the taxpayer with data available from multiple sources.

This includes:

• Form 26AS
• Annual Information Statement (AIS)
• Taxpayer Information Summary (TIS)
• TDS and TCS records
• Information received from banks, employers, and other financial institutions

If discrepancies are found during verification, the department recalculates the tax liability before issuing the refund.

Seven Common Reasons for a Lower Income Tax Refund

1. Incorrect TDS or TCS Details

Errors or mismatches in Tax Deducted at Source (TDS) or Tax Collected at Source (TCS) records can affect the final refund calculation.

If the tax credit claimed does not match the department's records, the refund may be revised accordingly.

2. Taxable Income Not Reported

Income such as:

• Bank interest
• Fixed deposit interest
• Capital gains
• Rental income
• Other taxable earnings

must be disclosed while filing the return.

If any taxable income is omitted, the department may recompute the tax liability and reduce the refund.

3. Incorrect Deduction Claims

Claiming deductions without proper eligibility or supporting documentation can also lead to a revised refund.

If deductions claimed under various provisions of the Income-tax Act are disallowed during processing, the taxable income increases, reducing the refund amount.

4. Errors in Advance Tax or Self-Assessment Tax

Incorrect reporting of advance tax payments or self-assessment tax may result in lower tax credits being recognised.

This can directly affect the refund issued after processing.

5. Mistakes in Tax Calculation

Calculation errors while preparing the return can also cause differences between the claimed and approved refund.

The department recalculates the tax based on verified information before finalising the refund.

6. Interest Charged Under Sections 234A, 234B or 234C

Interest may be levied if:

• The return is filed after the due date.
• Advance tax has not been paid adequately.
• Advance tax instalments are delayed.

Such interest becomes part of the taxpayer's total liability and can reduce the refund payable.

7. Adjustment Against Outstanding Tax Demand

If there is any pending tax demand relating to an earlier assessment year, the Income Tax Department may adjust the outstanding amount against the current refund.

However, taxpayers are generally informed before such an adjustment is made and are given an opportunity to respond through the e-filing portal.

How the Income Tax Department Calculates Refunds

The refund amount is determined after verifying:

• Total taxable income.
• Eligible deductions.
• Available tax credits.
• TDS and TCS deducted.
• Advance tax payments.
• Self-assessment tax paid.

If the total taxes already paid exceed the final tax liability, the balance amount becomes eligible for refund.

Any outstanding tax demand from previous years may be adjusted before the refund is released.

What Happens if the Department Revises Your Refund?

If the Income Tax Department makes any adjustment while processing the return, it sends an intimation under Section 143(1).

This communication explains:

• The revised tax computation.
• Changes made during processing.
• Reasons for the reduced refund, if any.

Taxpayers should carefully review this intimation before taking any further action.

What Should You Do if You Receive a Lower Refund?

If you believe the refund has been reduced due to an error, you should first compare the department's computation with your original return.

You may also review:

• Form 16
• Form 16A
• Form 26AS
• AIS
• TIS
• Tax payment challans
• Capital gains calculations
• Investment proofs
• Copy of the filed ITR

If a genuine mistake is identified, you may consider filing a rectification request through the Income Tax e-filing portal, subject to the applicable provisions.

Tips to Avoid Refund Mismatches

To minimise the chances of receiving a lower refund:

• Match your ITR with Form 26AS, AIS, and TIS before filing.
• Report all taxable income, including bank interest and capital gains.
• Choose the correct ITR form.
• Claim deductions only if supported by valid documents.
• Ensure your bank account is pre-validated.
• Complete e-verification promptly after filing the return.
• Review all information carefully before final submission.

Taking these precautions can help reduce processing delays, minimise refund adjustments, and ensure that your Income Tax Return is processed smoothly.