New Tax Regime vs Old Tax Regime India FY 2026-27: Who Wins at Every Salary Level?

The new income tax regime has been the default for salaried employees since FY 2023-24. But it was Budget 2025 that truly changed the calculation: the Section 87A rebate was raised to ₹60,000, covering taxable income up to ₹12 lakh — meaning a gross salary of ₹12.75 lakh now results in zero tax under the new regime. April 2026 marks the start of FY 2026-27, and your employer will deduct TDS under the new regime unless you explicitly opt for the old regime this month.

This article runs the precise tax calculation at ₹8L, ₹12L, ₹15L, and ₹20L salary and tells you exactly when the old regime still makes sense.

All calculations in this article use FY 2026-27 slab rates per the Finance Act 2025 (unchanged in Budget 2026), verified against ClearTax's tax calculator and Basunivesh's old vs new regime analysis. The old regime deduction scenarios use standard deduction ₹50K + 80C ₹1.5L + 80D ₹25K + NPS 80CCD(1B) ₹50K = ₹2.75L total deductions unless noted.

Why FY 2026-27 Is the Tipping Point for New Regime

Two changes introduced in Budget 2025 fundamentally shifted the new vs old debate:

1. 87A rebate raised to cover ₹12 lakh taxable income — Previously the rebate covered only ₹7 lakh (FY 2023-24). The jump to ₹12 lakh means that anyone with gross salary up to ₹12.75 lakh pays zero tax under the new regime.
2. Standard deduction raised to ₹75,000 — The new regime's standard deduction was ₹50,000 before; Budget 2025 raised it to ₹75,000. (Note: the old regime standard deduction remains at ₹50,000 — the enhancement is only for the new regime.)

Budget 2026 (February 2026) made no further changes to either regime's slab structure. The playing field for FY 2026-27 is identical to FY 2025-26.

New Tax Regime: Complete Slab Table

All slab taxes above are before the 4% health and education cess. The 87A rebate applies only if taxable income (after standard deduction) is ₹12 lakh or below — if taxable income is even ₹1 above ₹12L, no rebate is available.

Old Tax Regime: Slabs + Every Major Deduction

The Break-Even: How Much Deductions Do You Need?

The core question: at what total deduction amount does the old regime become better than the new? The answer is different at each income level. Here is the key insight from the analysis:

Verdict by Salary: ₹8L to ₹20L

The tax calculation methodology:

• New regime at ₹8L: Taxable = ₹7.25L; Tax = ₹16,250; 87A rebate covers it → ₹0
• New regime at ₹12L: Taxable = ₹11.25L; Tax = ₹52,500; 87A rebate applies (≤₹12L) → ₹0
• New regime at ₹15L: Taxable = ₹14.25L; Tax = ₹93,750 (no 87A — taxable > ₹12L); Cess = ₹97,500
• Old regime at ₹8L (₹2.75L deductions): Taxable = ₹5.25L; Tax = ₹17,500; Cess = ₹18,200
• Old regime at ₹12L (₹2.75L deductions): Taxable = ₹9.25L; Tax = ₹97,500; Cess = ₹1,01,400
• Old regime at ₹15L (₹2.75L deductions): Taxable = ₹12.25L; Tax = ₹1,80,000; Cess = ₹1,87,200

Who Should Still Choose Old Regime?

Despite the new regime's clear advantage at lower incomes, there is a specific profile for whom old regime still makes financial sense — primarily those combining multiple high-value deductions:

Use the UtilsDaily income tax calculator to enter your salary and deduction components and see the exact tax under both regimes for FY 2026-27.

How to Opt Into Old Regime (April Is the Window)

Since the new regime is the default, you need to actively opt for the old regime if you want it for FY 2026-27. Here is how:

1. For salaried employees: Submit a declaration to your employer in April 2026 stating you want to opt for the old tax regime. Your employer's payroll system will then deduct TDS under old regime rates and allow you to declare your deductions (HRA, 80C, etc.) for TDS computation.
2. If you miss informing your employer: Your employer will deduct TDS under the new regime. You can still choose the old regime at the time of filing your ITR (July–September 2026 for FY 2026-27). Excess TDS deducted will be refunded by the Income Tax Department after filing.
3. For individuals with business income: Use Form 10-IE to opt for the new regime, or simply file under the old regime. Note: business income earners who switch can revert back to old regime only once.
4. To calculate which regime is better for you: Use the UtilsDaily income tax calculator with your actual HRA, home loan interest, and 80C/NPS figures before deciding. The calculator computes both regimes and shows the saving.

Sources & Citations

Data sources: BusinessToday — FY 2026-27 tax slabs and regime comparison, February 2026; ClearTax — Old tax regime vs new tax regime guide; ClearTax — Income tax slab rates FY 2026-27; ClearTax — Section 87A rebate (₹12L threshold); Tax2win — Standard deduction ₹75,000 in new regime; Tax2win — Switching regimes: annual flexibility for salaried employees; Basunivesh — New vs old regime break-even analysis FY 2026-27; ISFCM — Section 24(b) home loan interest cap remains at ₹2L after Budget 2026; BusinessToday — Section 80C renamed Section 123 from April 1, 2026 (March 24, 2026).