1% per monthIT Act 2025 §§ 273-275
Section 234A/B/C Interest Calculator
Sections 273 / 274 / 275 of IT Act 2025 - interest on late ITR filing, advance tax shortfall, and instalment deferment. 1% per month, simple interest.
Total interest under §§ 273 + 274 + 275
₹9,835
Mandatory; cannot be reduced by appeal
- §273 (234A) - Late filing₹2,100
- §274 (234B) - Advance tax shortfall₹4,200
- §275 (234C) - Instalment deferment₹3,535
- Tax payable (assessed − advance − TDS)₹70,000
Interest is simple, 1% per month, calculated on shortfall. Cess and surcharge are NOT included in computation of shortfall.
The three interest provisions
- Section 273 (formerly 234A) - late filing of ITR. 1% per month on tax payable from due date to filing date. Tax payable = assessed tax minus advance tax, TDS, TCS already paid.
- Section 274 (formerly 234B) - shortfall in advance tax. 1% per month on (assessed tax − advance tax actually paid) from April 1 of the AY to date of payment / assessment.
- Section 275 (formerly 234C) - deferment of advance tax instalments. Charged at 1% per month for 3 months on shortfall in each of the four prescribed instalments (15 Jun, 15 Sep, 15 Dec, 15 Mar). The March instalment attracts only 1 month of interest.
Statutory authority
Related calculators
FAQs
What does Section 234A penalise?▾
Section 273 (formerly 234A) charges 1% per month on tax payable for filing your ITR after the due date (typically July 31 or October 31). Tax payable means assessed tax minus advance tax, TDS, TCS.
How is Section 234B different from 234C?▾
234B (now §274) is interest for shortfall in advance tax - charged from April 1 of the AY to the date of payment, at 1% per month. 234C (now §275) is interest for deferring instalments of advance tax - charged on shortfall in each quarter's prescribed instalment, at 1% per month for 3 months (1 month for the final instalment).
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