Advance Tax Interest Estimator

Calculate advance tax shortfall with 234B and 234C interest

Enter your net tax liability and cumulative advance tax paid by due dates to estimate section-wise interest and total amount payable.

FY-based AY logic Section 234B + 234C Due-date shortfall table

Advance tax trigger

Net tax > Rs 10,000

234B rule used

Less than 90% paid

Interest rate

1% per month

Enter advance tax details

Use cumulative advance-tax paid up to each due date.

Before you calculate

Enter net tax components after considering TDS/TCS and eligible reliefs/credits.
Installment fields are cumulative values (non-decreasing by due date).
234B is computed from 1 April of assessment year up to self-assessment payment month.

Basic details

Financial Year

Date of self-assessment tax payment

Tax base for interest calculation

Total tax liability (including cess)

TDS/TCS credit

Relief / MAT credit (if any)

Cumulative advance tax paid

Cumulative advance tax paid up to 15 June

Cumulative advance tax paid up to 15 September

Cumulative advance tax paid up to 15 December

Cumulative advance tax paid up to 15 March

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Tax Planning: Detailed Guide

This tax calculator helps you estimate your liability using the inputs you provide and current rule assumptions in this tool. Use it to build a practical tax strategy around income, deductions, capital gains, withholding, and advance payments. The output is best used as a planning estimate and should be reviewed with your actual documents, filing status, and eligible exemptions before final tax filing.

For better planning quality, test multiple scenarios across income levels, deduction usage, holding periods, and tax rates. Small changes in taxable income, exemption eligibility, or surcharge and cess exposure can materially impact final outgo. Recalculate during the year whenever salary structure changes, investment actions occur, or tax rules are updated for your filing year.

How to use tax calculators effectively

Start with accurate numbers from Form 16, AIS/TIS, broker statements, rent receipts, loan certificates, and investment records. Split your calculations by salary, business, capital gains, and other income heads so you can identify where optimization opportunities actually exist.

Common tax planning mistakes to avoid

Taxpayers often mix financial-year and assessment-year data, miss deduction limits, or assume all gains are taxed at slab rates. Another frequent mistake is waiting until the filing deadline instead of planning across the year, which reduces options for better tax efficiency.

Build a complete tax strategy

Use income tax, HRA, section-based deduction, capital gains, TDS, and refund estimators together for a complete view. This integrated approach helps you improve compliance, reduce surprises at filing time, and make better cash-flow decisions through the year.