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What this calculator does

This page helps you estimate the likely result for Interest Calculator (234A, 234B, 234C) from the details entered in the calculator below. Treat the output as a planning estimate, not as a substitute for the final filing computation.

Inputs explained

  • Total Tax Liability: Use the figure relevant to your case and keep the unit consistent with the form.
  • TDS/TCS Deducted: Use the figure relevant to your case and keep the unit consistent with the form.
  • Advance Tax Paid: Use the figure relevant to your case and keep the unit consistent with the form.
  • Self Assessment Tax: Use the figure relevant to your case and keep the unit consistent with the form.
  • ITR Due Date: Use the figure relevant to your case and keep the unit consistent with the form.

How it works / Method

The calculator uses the values you enter, applies the relevant rule logic for this topic, and updates the result summary immediately after calculation.

Formula or calculation logic

Estimate based on the monthly interest rule applied to the relevant unpaid tax or shortfall period.

Calculate Interest

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Interest Calculation

Enter details to calculate interest.

Step-by-step example

  1. Enter Total Tax Liability as e.g., 200000 for a sample case.
  2. Enter TDS/TCS Deducted as 0 for a sample case.
  3. Enter Advance Tax Paid as 0 for a sample case.
  4. Click the calculate button and review the Interest Calculation panel.

Use cases

  • Review the likely tax impact before filing or payment.
  • Check how changing one input affects the estimate.
  • Prepare a cleaner draft working before using the official portal.

Assumptions & limitations

  • Results are estimates only and should be checked against the correct FY and AY rules.
  • This page does not validate every exemption condition, document requirement, or edge case.
  • Verify the latest filing rules before submitting returns, proofs, or tax payments.

Sources & references

Interest Under Section 234

Section 234A - Late Filing

Rate: 1% per month (part month = full month) On: Outstanding tax (Total tax - TDS - Advance Tax) Period: From due date to actual filing date Example: Due date 31-Jul, Filed 15-Oct Months = 3 (Aug, Sep, Oct counted as full) Interest = Outstanding Tax × 1% × 3

Section 234B - Non-payment of Advance Tax

Rate: 1% per month On: Amount by which advance tax falls short of 90% Period: From 1st April to filing date Applicable when: Advance tax paid < 90% of assessed tax Interest = Shortfall × 1% × Months

Section 234C - Deferment of Advance Tax

Rate: 1% per month × 3 months (per installment) On: Shortfall in each installment Due Dates: Cumulative % 15-Jun 15% 15-Sep 45% 15-Dec 75% 15-Mar 100%

FAQs

All three sections charge interest at 1% per month or part of month. It's simple interest, not compounded.

Yes, even 1 day delay in a month counts as a full month for interest calculation.

If tax liability (after TDS) is less than ₹10,000, you're not required to pay advance tax and 234B/234C won't apply.

Yes, you may be liable to pay interest under all three sections simultaneously depending on your tax payment and filing pattern.

Related Calculators

Advance Tax

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Quick Tax

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⚠️ Disclaimer: Results are estimates only. Tax rules can change by financial year and assessment year, so verify the current filing rules before submitting returns or proofs.