India · Salary & Tax

Section 234B Interest Calculator India

Estimate interest for short payment of advance tax using the statutory 90% test and 1% monthly rate.

India-focusedAY 2026-27 planningMethod & assumptions ↓

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How this calculator works

Section 234B can apply when advance tax paid is less than 90% of assessed tax. This planner uses 1% simple interest for every month or part of a month on the simplified unpaid assessed-tax amount. Actual computation can change with payment dates, reliefs, credits and assessment events.

Important note

This tool is designed for planning and does not replace a tax return, challan computation, professional advice or the Income Tax Department's official systems.

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How to use this calculator

  1. Set Assessed tax after TDS/TCS and eligible credits (default 200000).
  2. Set Advance tax paid (default 150000).
  3. Set Months or part-months from 1 April to payment/assessment (default 4).
  4. Select Calculate to update the result. Reset restores the starting values.

Planning estimate only. Verify current law, eligibility, payment dates, credits and official guidance before filing or paying tax.

Maintained by the CalculatorsOnline Editorial Team. Read our methodology policy.