Question 1

What do Sections 234A, 234B and 234C cover?

Accepted Answer

234A is interest for late/non-filing of return, 234B is for shortfall in advance tax (less than 90% of assessed tax), and 234C is for deferment or missing quarterly instalment cut-offs.

Question 2

What are the new ITA 2025 section numbers?

Accepted Answer

234A maps to Section 423, 234B to Section 424, and 234C to Section 425 of the Income-tax Act, 2025.

Question 3

What is the 90% rule for advance tax?

Accepted Answer

If advance tax paid is less than 90% of assessed tax, Section 234B interest applies on the shortfall from 1 April of the assessment year.

Question 4

What are the quarterly advance-tax percentages?

Accepted Answer

15% by 15 June, 45% by 15 September, 75% by 15 December and 100% by 15 March of the financial year.

Question 5

How is part-of-a-month treated?

Accepted Answer

Any part of a month counts as a full month. The tax base is rounded down to the nearest ₹100 as per Rule 119A.

Question 6

What is the difference between 234A and 234B?

Accepted Answer

234A runs from the day after the return due date until the actual filing date. 234B runs from 1 April of the assessment year until self-assessment tax payment or assessment.

Interest Calculator — Section 234A / 234B / 234C

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