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Old vs New Tax Regime: Which One Should You Choose?

The New Regime wins for most people since Budget 2025 — but not everyone, and the reason why is worth actually understanding before you file.

What actually changed

Budget 2025 significantly widened the New Regime's tax-free zone. The Section 87A rebate now zeroes out tax entirely for taxable income up to ₹12,00,000, and the standard deduction under the New Regime rose to ₹75,000 (versus ₹50,000 under the Old Regime). Combined with the New Regime's wider slabs, this shifted the calculation for most salaried taxpayers who don't claim large deductions — the New Regime now comes out ahead in the large majority of real comparisons, which wasn't as clearly true before this change.

Side-by-side: slabs and deductions, FY 2025-26

New Tax Regime

  • Standard deduction: ₹75,000 (salaried)
  • Slabs: nil up to ₹4L, 5% (₹4–8L), 10% (₹8–12L), 15% (₹12–16L), 20% (₹16–20L), 25% (₹20–24L), 30% above ₹24L
  • Section 87A rebate: zeroes tax entirely for taxable income up to ₹12L
  • Deductions allowed: almost none beyond the standard deduction — that's the trade-off for the wider slabs

Old Tax Regime

  • Standard deduction: ₹50,000 (salaried)
  • Basic exemption: ₹2.5L (below 60), ₹3L (60–80, senior citizen), ₹5L (above 80, super senior)
  • Slabs above the exemption: 5% (up to ₹5L), 20% (₹5–10L), 30% above ₹10L
  • Section 87A rebate: zeroes tax for taxable income up to ₹5L only
  • Deductions allowed: Section 80C (up to ₹1.5L — PF, ELSS, life insurance, etc.), 80D (health insurance), HRA exemption, home loan interest under Section 24(b), and others

A worked example

Take a ₹15,00,000 salary with no other income:

  • New Regime: taxable income = ₹15L − ₹75,000 = ₹14,25,000 → tax ≈ ₹97,500
  • Old Regime, no deductions claimed: taxable income = ₹15L − ₹50,000 = ₹14,50,000 → tax ≈ ₹2,57,400

The New Regime saves roughly ₹1,59,900 here — a wide enough gap that it takes a genuinely large deduction claim under the Old Regime to close it. Even with a substantial ₹4,00,000 in real Old Regime deductions (a big home loan interest claim plus a full 80C plus 80D), Old Regime tax on the same ₹15L salary would still land well above the New Regime's ₹97,500. This is the general pattern post-Budget-2025: the New Regime's advantage is large enough now that only unusually large, genuine deduction totals — not a routine 80C contribution alone — tend to close the gap.

A simple decision framework

  1. Add up your real, actually-claimed Old Regime deductions — not the maximum theoretically possible, the amount you genuinely have: your real 80C investments, real HRA-eligible rent, real home loan interest, real 80D premium.
  2. If that total is small or zero (most people early in their career, or without a home loan), the New Regime almost certainly wins — its wider slabs and bigger standard deduction do the work without you needing to claim anything.
  3. If that total is large (typically ₹3.5–4L or more, often driven by home loan interest), it's genuinely worth comparing both regimes on your actual numbers rather than assuming either one — the exact crossover point depends on your specific income and deduction mix.
  4. Either way, don't guess — calculate both. The gap can be large enough that guessing wrong costs real money, and it takes under a minute to compare both regimes properly on your real figures.

Compare your own numbers

ToolQiva's Income Tax Calculator runs both regimes side by side from your actual salary, other income and Old Regime deductions, and gives a clear verdict — not a generic explainer. If HRA, PF or an investment plan is part of your comparison, the HRA Calculator, PPF Calculator and SIP Calculator help work out the exact deduction or investment figures to plug in.

This is a planning estimate based on the FY 2025-26 (AY 2026-27) slab structure as of publication — always confirm with a tax advisor or the official Income Tax Department calculator before filing, since rules and rates can change.

Frequently asked questions

What's the standard deduction under each regime?

₹75,000 under the New Regime, ₹50,000 under the Old Regime, for FY 2025-26 (AY 2026-27) — both apply to salaried income before tax is calculated.

Up to what income is tax fully zero under the New Regime?

Taxable income up to ₹12,00,000 owes zero tax under the New Regime, thanks to the Section 87A rebate introduced in Budget 2025 (up to ₹4L nil, then 5/10/15/20/25/30% slabs above that, with the rebate zeroing out tax entirely below the ₹12L threshold).

Does the Old Regime ever still win?

Yes — typically at higher incomes with substantial genuine deductions (a large home loan interest claim under Section 24(b), a full ₹1.5L Section 80C investment, HRA exemption on real rent paid, and 80D health insurance, stacked together). The gap has to be large enough to overcome the New Regime's wider, lower-rate slabs and higher standard deduction.

Can I switch between regimes every year?

Salaried individuals with no business income can choose either regime freshly each year when filing. Those with business or professional income face more restricted switching rules — check current Income Tax Department guidance if that applies to you.