JASMINE KAUR HUDA
Chartered Accountant
Published on: Mar 27, 2026
Interest under Sections 234A, 234B & 234C - A Practical Guide for Taxpayers
Under the Income Tax Act of 1961, Sections 234A, 234B, and 234C provide for interest on the delayed filing of your personal income tax return, as well as the non-payment of your advance tax. Such interest is charged and collected automatically and by law. Next, let us explain what these sections mean and how they work in simple practical terms.
1ļøā£ Section 234A ā Interest for Delay in Filing Return
When is it applicable?
If a taxpayer files the Income Tax Return (ITR) after the due date prescribed under Section 139(1).
Rate of Interest:
- 1% per month or part of a month
- Calculated on the tax payable after reducing TDS, TCS, advance tax, relief, etc.
Period of Calculation:
From:
- Due date of return To:
- Actual date of filing return
If return is not filed, interest runs till date of completion of assessment.
Important Points:
- Even a delay of one day attracts interest for the entire month.
- If tax liability is nil after TDS, 234A will not apply.
Example:
Tax payable after TDS = ā¹1,00,000 Due date = 31 July Return filed on 10 October
Delay = August, September, October = 3 months Interest = 1,00,000 Ć 1% Ć 3 = ā¹3,000
2ļøā£ Section 234B ā Interest for Non-Payment / Short Payment of Advance Tax
When is it applicable?
If:
- Advance tax paid is less than 90% of assessed tax AND
- Total tax liability exceeds ā¹10,000
Rate of Interest:
- 1% per month or part thereof
Period:
From:
- 1st April of Assessment Year To:
- Date of payment of tax (or assessment order)
On What Amount?
On the amount of shortfall in advance tax.
Example:
Assessed Tax = ā¹5,00,000 Advance Tax Paid = ā¹3,50,000
Shortfall = ā¹1,50,000 Interest = ā¹1,50,000 Ć 1% per month from 1 April till date of payment.
3ļøā£ Section 234C ā Interest for Deferment of Advance Tax Installments
This applies when advance tax is not paid as per prescribed quarterly percentages.
Applicable Advance Tax Due Dates:
For Non-Corporate Assessee:
| Due Date | % of Tax Payable |
|---|---|
| 15 June | 15% |
| 15 Sept | 45% |
| 15 Dec | 75% |
| 15 March | 100% |
For Corporate Assessee ā Same percentages apply.
Rate of Interest:
- 1% per month
- For 3 months (except last installment ā 1 month)
Example:
Total tax liability = ā¹10,00,000 Required by 15 Sept = ā¹4,50,000 Paid = ā¹3,00,000
Shortfall = ā¹1,50,000 Interest = ā¹1,50,000 Ć 1% Ć 3 months = ā¹4,500
Key Differences at a Glance
| Section | Reason | When Charged | Rate |
|---|---|---|---|
| 234A | Late filing of ITR | After due date | 1% per month |
| 234B | Short payment of advance tax | If <90% paid | 1% per month |
| 234C | Delay in installments | Quarterly shortfall | 1% per month |
Important Practical Notes
ā Interest under these sections is mandatory and cannot be waived except under specific CBDT circular powers.
ā Interest is calculated on monthly basis (part month = full month).
ā Even if income increases at assessment stage, additional interest may be levied.
ā Applicable to Individuals, Firms, LLPs, Companies, etc.
Professional Tip (Especially for SMEs & Professionals)
- Always estimate income by December to avoid heavy 234C burden.
- For presumptive taxpayers under Section 44AD/44ADA, full tax can be paid by 15 March to avoid 234C.
- Reconcile TDS properly before filing return to avoid unnecessary 234A exposure.