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Income Tax Calculator: Inputs, Options, and How to Read the Results

A practical reference for the Income Tax Calculator — the inputs it accepts, the regime options, and how to read the side-by-side result.

Published August 28, 20264 min read
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Inputs and options

The Income Tax Calculator is an input-based calculator — you type values directly in your browser. Nothing is uploaded.

Inputs

InputWhat to enter
Gross incomeYour total annual income (salary, business, other sources)
Standard deductionThe flat deduction available under the old regime
80C & 80D deductionsInvestments and insurance premiums eligible under the old regime
HRA / other exemptionsHouse rent allowance or any additional exemptions you claim

Options

  • Regime view — the tool always computes both the new regime and the old regime, side by side
  • 87A rebate — applied automatically when your taxable income falls within the rebate threshold
  • Health and education cess — 4% added automatically after the tax and rebate are computed

Getting the best results

  • Enter gross income, not take-home salary, so the result reflects your true taxable income
  • Under the old regime, claim every deduction you are eligible for — 80C, 80D, HRA, and standard deduction
  • Compare both numbers and remember that the new regime blocks most deductions, so a lower headline rate is not always cheaper

Verdict

The Income Tax Calculator takes your income and deductions and returns a clear FY 2026-27 tax figure under both regimes with the 87A rebate and cess applied.

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Frequently asked questions

What inputs does the Income Tax Calculator need?

Your gross annual income and any deductions you can claim such as standard deduction, 80C, 80D, and HRA.

How is the 87A rebate applied?

The rebate is applied to your income tax before cess when your taxable income falls within the FY 2026-27 threshold, exactly as per Section 87A.

Does the old regime require all deductions to be entered?

Deductions only reduce your tax under the old regime, so enter every one you are eligible for to get an accurate comparison.

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