Free tool · Rules updated 28 Sep 2026
Interest Calculator — Sections 234A, 234B & 234C
234A: 1% per month on unpaid tax for filing late. 234B: 1% per month if advance tax paid is less than 90% of the tax due. 234C: 1% per month for missing each advance tax instalment. Part of a month counts as a full month.
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Interest 234A / 234B / 234C — common questions
Do salaried people pay 234B/234C?
Only if tax due after TDS is ₹10,000 or more — for example when you have large interest, rent or capital gains income that had no TDS.
Is this an exact figure?
It is a close estimate. The department calculates to the exact date; our expert confirms the final figure before filing.
This tool gives an estimate based on the rules shown. Your actual tax depends on your full details — our expert confirms the final figure before filing.
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