Updated 2026-07-30

Old vs New Tax Regime: Concepts & Breakeven Guide

This conceptual guide explains how the old and new income tax regimes work, the math behind breakeven points, and how to evaluate your choice for FY 2026-27. For a personalized comparison using your actual salary and deductions, use the interactive [Income Tax Calculator](/income-tax-calculator/). For specific income levels, see worked examples like [₹12 Lakh CTC](/learn/12-lakh-ctc-in-hand-salary/) and [₹15 Lakh CTC](/learn/15-lakh-ctc-monthly-in-hand-salary/).

Gross Annual Income

₹

Employment Status

Old Regime Deductions

80C (EPF, PPF, ELSS)

₹

80D (Health Insurance)

₹

HRA Exemption

₹

Home Loan Interest (Sec 24)

₹

NPS 80CCD(1B)

₹

New Regime

Winner

Taxable Income₹14.25 L

Deductions₹75,000

Tax + Cess₹97,500

Monthly Take-Home₹1.17 L

Old Regime

Taxable Income₹10.25 L

Deductions₹4.75 L

Tax + Cess₹1.25 L

Monthly Take-Home₹1.15 L

New Regime (Real In-Hand Value)

₹1.17 L/month

Your gross salary of ₹15.00 L/year (₹1.25 L/month) is reduced to a real take-home of ₹1.17 L/month after deducting ₹8,125/month in taxes and cess.

New regime saves you ₹27,300/year (₹2,275/month more)

With ₹4.25 L in deductions, new regime's lower slabs still save more. You'd need ~₹more deductions for old regime to win.

Based on FY 2026-27 slabs (Income Tax Act 2025). Standard deduction: ₹75,000 (new) / ₹50,000 (old). Section 87A rebate applied automatically.

Tax Slab Structure Comparison

Income Slab	New Regime Rate	Old Regime Rate
Up to ₹2.5L	0%	0%
₹2.5L – ₹4L	0%	5%
₹4L – ₹5L	5%	5%
₹5L – ₹8L	5%	20%
₹8L – ₹10L	10%	20%
₹10L – ₹12L	10%	30%
₹12L – ₹16L	15%	30%
₹16L – ₹20L	20%	30%
₹20L – ₹24L	25%	30%
Above ₹24L	30%	30%

Note: New regime slabs reflect FY 2026-27 (Income Tax Act 2025). A 4% health and education cess applies on top of base tax under both regimes.

Breakeven Analysis: Required Deduction Thresholds

Gross Income	Tax (New Regime)	Deductions Needed for Old to Win	Typical Deductions Available
₹8L	₹0 (87A rebate)	N/A (New wins)	₹1.5–2L
₹10L	₹0 (87A rebate)	N/A (New wins)	₹2–3L
₹12L	₹0 (87A rebate)	N/A (New wins)	₹2.5–4L
₹15L	≈₹1.04L	≥ ₹4.25L	₹3.5–5.5L (with HRA)
₹20L	≈₹2.34L	≥ ₹5.25L	₹4–7L (with HRA + home loan)
₹30L	≈₹5.46L	≥ ₹6.75L	₹5–8L (max deductions)

Evaluating the Two Regimes

Selecting the appropriate regime depends on total eligible deductions relative to progressive tax rates. The decision math balances rate discounts against deduction caps.

New Regime: Lower Rates Without Itemization

The new regime applies lower marginal slab rates across middle-income brackets while excluding most itemized deductions:

Standard deduction: ₹75,000 for salaried employees
Section 87A rebate: Taxable income up to ₹12 lakh incurs zero net tax
Progressive slab structure: Lower marginal rates between ₹4 lakh and ₹24 lakh taxable
Simplified compliance: No investment proof submission required for payroll TDS

Old Regime: Deductions Offset Higher Marginal Slabs

The old regime applies steeper progressive rates (20% above ₹5 lakh taxable) but permits itemized deductions:

Section 80C: Up to ₹1,50,000 (EPF, PPF, ELSS, tuition fees)
Section 80D: Up to ₹25,000–₹1,00,000 (health insurance premiums)
HRA Exemption: Substantial deduction for rent paid in metro areas
Section 24(b): Up to ₹2,00,000 for self-occupied home loan interest
Section 80CCD(1B): Up to ₹50,000 for additional NPS contributions
Standard deduction: ₹50,000 for salaried employees

Decision Framework

Consider the New Regime if:

Gross salary is up to ₹12.75 lakh (zero tax after standard deduction)
You do not pay rent eligible for HRA exemptions
You do not hold a self-occupied home loan
Total itemized deductions fall below the breakeven threshold for your income

Consider the Old Regime if:

You pay substantial metro rent resulting in a large HRA exemption
You pay eligible home loan interest up to the ₹2 lakh cap
Combined 80C, 80D, HRA, and NPS deductions exceed your income bracket's breakeven threshold

Frequently Asked Questions

Who benefits most from the new tax regime?

The new regime provides lower progressive tax rates and a Section 87A rebate for taxable income up to ₹12 lakh. It benefits taxpayers whose total itemized deductions under the old regime (80C, 80D, HRA, home loan interest, NPS) remain below the breakeven threshold for their income level.

Can salaried employees switch between regimes annually?

Yes. Salaried taxpayers without business income (filing ITR-1 or ITR-2) can evaluate and switch between old and new regimes each financial year when filing returns. Taxpayers with business or professional income (ITR-3 or ITR-4) can opt out of the new regime only once in a lifetime.

Is the new tax regime the default option?

Yes. Under current tax administration, the new regime operates as the default regime. Unless an employee explicitly declares choice of the old regime to their employer for payroll TDS, or selects old regime during ITR filing, tax is computed under new regime rules.

Which deductions are allowed under the new tax regime?

The new regime permits a salaried standard deduction of ₹75,000 and employer NPS contributions under Section 80CCD(2) up to applicable limits. Itemized deductions under Section 80C, 80D, HRA exemption, and self-occupied home loan interest under Section 24(b) are not available.

How do I calculate the old-regime breakeven point?

The breakeven point is the total deduction amount at which old-regime tax equals new-regime tax. At ₹15 lakh gross salary, total eligible deductions must exceed roughly ₹4.25 lakh for the old regime to produce lower tax than the new regime.

How does Section 87A rebate work under each regime?

Under the new regime, taxable income up to ₹12 lakh receives a Section 87A rebate that reduces tax to zero (covering gross salary up to ₹12.75 lakh with standard deduction). Under the old regime, Section 87A rebate applies to taxable income up to ₹5 lakh.

Try it yourself → Income Tax Calculator