Learn how to use Tax Estimator, define the inputs correctly, and interpret income tax payable results with scenario testing.
Tax Estimator is designed for one job: Old vs new regime comparison with slab-level visibility. The best way to use it is to model scenarios, not to hunt for a single “perfect” number.
If you understand how inputs like financial year, income sources, and deductions shape income tax payable, you can spot mistakes quickly and keep outputs decision-ready.
This tool models income tax payable for common cases so you can compare tradeoffs quickly.
If your scenario is unusual, treat the output as a starting point and validate assumptions before committing.
Key inputs: financial year, income sources, deductions, and tax already paid.
Be consistent about units (monthly vs annual) and scope (include fees/taxes if they exist in real life).
Compare outputs like tax payable and old vs new comparison across scenarios instead of trusting one number.
If the decision changes under downside assumptions, build a buffer or revise the plan.