Income Tax Calculator

Income Tax Calculator — how it works

Not sure whether the old or new tax regime saves you more? This calculator runs your income through both regimes side by side, so you can see the numbers before you decide — rather than after you've already filed.

How it works

Enter your gross annual income, whether it's salaried or business income, your age group, and — for the old regime — your deductions under sections like 80C and 80D, or HRA. The calculator applies the current slab rates to both regimes and tells you which one results in lower tax.

Old regime vs new regime

The new regime has lower slab rates but drops most deductions and exemptions. The old regime keeps deductions like 80C (₹1.5L), 80D, HRA and home loan interest, but taxes income at higher rates. Which one wins depends entirely on how much you can actually claim in deductions — this is exactly what the calculator compares.

Why it matters

Choosing the wrong regime can mean paying thousands of rupees more in tax than necessary. Salaried employees can switch regimes every year; business owners have more restricted switching rules — worth confirming with us before you commit.

The formula

Why use Pretax's income tax calculator

• Current rates. Slabs and limits are reviewed against the current Finance Act.
• Nothing leaves your browser. Every calculation runs on your device — we never see or store what you type.
• Built by working CAs. The same team that files returns for our clients maintains these formulas.
• Free, no signup. No account and no email required to see a result.

Frequently asked questions