Interest Under Sections 234A, 234B and 234C: What Every Taxpayer Must Know
Missing income tax deadlines can cost you. The Act levies interest under three sections, each for a different default.
SECTION 234A — LATE FILING OF ITR
If you file your return after the due date, interest at 1% per month (or part month) is charged on the net tax due — total tax minus advance tax, TDS and TCS credits. The period runs from the day after the due date to the actual filing date. A separate late fee under Section 234F also applies.
Example: Due date is 31st July 2025, you file 15th October 2025 — counting as 3 months. Net tax due: Rs 1,00,000. Interest = 1% x 3 x Rs 1,00,000 = Rs 3,000.
SECTION 234B — SHORT PAYMENT OF ADVANCE TAX
If your estimated tax liability is Rs 10,000 or more for the year, you must pay advance tax. Resident senior citizens (60+) with no business or profession income are exempt. If advance tax paid is less than 90% of assessed tax, interest at 1% per month applies on the shortfall from 1st April of the assessment year until the date of determination under Section 143(1) or regular assessment.
Example: Assessed tax is Rs 2,00,000 and you paid Rs 1,50,000. Since that is below 90% (Rs 1,80,000), interest applies on the shortfall of Rs 50,000. For 4 months: 1% x 4 x Rs 50,000 = Rs 2,000.
SECTION 234C — DEFERMENT OF ADVANCE TAX INSTALLMENTS
Advance tax is due in installments: 15% by 15th June, 45% by 15th September, 75% by 15th December, and 100% by 15th March. Taxpayers under Sections 44AD/44ADA pay 100% by 15th March only. If you fall short in any quarter, interest at 1% per month is charged on the shortfall for 3 months (1 month for the last installment). Shortfalls caused by capital gains, dividend income, casual income (lottery/winnings), or first-time business income may be ignored for 234C interest if tax is paid in the remaining installments or by 31st March.
Example: Total advance tax is Rs 4,00,000. By 15th September, 45% (Rs 1,80,000) is due. You paid Rs 1,20,000 — shortfall is Rs 60,000. Interest = 1% x 3 x Rs 60,000 = Rs 1,800.
KEY TAKEAWAY
All three sections charge 1% per month for different defaults, and a part month counts as full. Plan your tax payments early to avoid these costs adding up.
SECTION 234A — LATE FILING OF ITR
If you file your return after the due date, interest at 1% per month (or part month) is charged on the net tax due — total tax minus advance tax, TDS and TCS credits. The period runs from the day after the due date to the actual filing date. A separate late fee under Section 234F also applies.
Example: Due date is 31st July 2025, you file 15th October 2025 — counting as 3 months. Net tax due: Rs 1,00,000. Interest = 1% x 3 x Rs 1,00,000 = Rs 3,000.
SECTION 234B — SHORT PAYMENT OF ADVANCE TAX
If your estimated tax liability is Rs 10,000 or more for the year, you must pay advance tax. Resident senior citizens (60+) with no business or profession income are exempt. If advance tax paid is less than 90% of assessed tax, interest at 1% per month applies on the shortfall from 1st April of the assessment year until the date of determination under Section 143(1) or regular assessment.
Example: Assessed tax is Rs 2,00,000 and you paid Rs 1,50,000. Since that is below 90% (Rs 1,80,000), interest applies on the shortfall of Rs 50,000. For 4 months: 1% x 4 x Rs 50,000 = Rs 2,000.
SECTION 234C — DEFERMENT OF ADVANCE TAX INSTALLMENTS
Advance tax is due in installments: 15% by 15th June, 45% by 15th September, 75% by 15th December, and 100% by 15th March. Taxpayers under Sections 44AD/44ADA pay 100% by 15th March only. If you fall short in any quarter, interest at 1% per month is charged on the shortfall for 3 months (1 month for the last installment). Shortfalls caused by capital gains, dividend income, casual income (lottery/winnings), or first-time business income may be ignored for 234C interest if tax is paid in the remaining installments or by 31st March.
Example: Total advance tax is Rs 4,00,000. By 15th September, 45% (Rs 1,80,000) is due. You paid Rs 1,20,000 — shortfall is Rs 60,000. Interest = 1% x 3 x Rs 60,000 = Rs 1,800.
KEY TAKEAWAY
All three sections charge 1% per month for different defaults, and a part month counts as full. Plan your tax payments early to avoid these costs adding up.
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Disclaimer: This content is the author's personal opinion and analysis. It does not constitute professional tax or legal advice. Consult a qualified professional for specific advice on your situation.
Comments (3)
Two dates to remember: 30 May and 30 October. That's it.
Rs 100/day penalty with a cap is manageable. The real risk is not filing at all.
Form 8 auditor certification threshold is the one LLPs always get wrong