TaxCalc — Advance Tax Prototype

Step 1

Your profile

Basic facts that affect the tax calculation.

Tax Year Taxpayer Type

Residential Status

Tax Regime Old-regime option will be added as a separate rules pack. Presumptive taxation

Use single advance-tax instalment due on 15 March

Use only where the applicable presumptive scheme conditions are satisfied.

Step 2

Income

Enter taxable amounts under each head after head-specific adjustments.

v0.1 does not yet compute salary exemptions, house-property set-off, depreciation, or head-wise special rules. Enter the taxable figure you want included under normal slab rates.

Taxable Salary

Rs.

House Property

Rs.

Enter the taxable amount after applicable head-wise rules. Business / Profession

Rs.

Other Sources

Rs.

Special-rate income preview only

Rs.

Examples: certain capital gains. Entering a value flags the result as incomplete until the special-rate engine is added.

Step 3

Deductions

Only deductions actually permitted under the selected regime should be entered.

Eligible deductions

Rs.

This is a controlled manual input in v0.1. Detailed deduction eligibility will become rule-driven later.

Step 4

Taxes already paid

TDS/TCS reduces the amount considered for advance-tax liability.

Estimated TDS / TCS for the tax year

Rs.

Advance tax paid

By 15 Jun 2026

Rs.

By 15 Sep 2026

Rs.

By 15 Dec 2026

Rs.

By 15 Mar 2027

Rs.

Step 5

Advance tax

Your estimated position for Tax Year 2026–27.

Total IncomeRs. 0Normal-rate income

Gross Tax LiabilityRs. 0After rebate, surcharge & cess

TDS / TCSRs. 0Estimated credits

Advance Tax PayableRs. 0Rs. 10,000 threshold

Instalment schedule

Cumulative requirement based on estimated advance tax.

Normal

Due date	Cumulative %	Required	Paid	Balance	Status

Interest under sections 424 and 425 is not yet computed in prototype v0.1.

Calculation trail

Every major number stays visible.

Step 6

Summary

A compact view ready for testing and future export.

Estimated remaining advance tax Rs. 0

Complete the inputs to estimate your position.

Prototype scope

TY 2026–27 section 202 slab rates
Resident / NRI rebate handling
Surcharge + marginal relief for normal income
4% Health & Education Cess
Advance-tax threshold and instalments
Special-rate capital gains
Old-regime option
Sections 424 / 425 interest
Detailed head-wise set-off & deduction engine