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Old vs New Tax Regime Calculator

With the introduction of the revised New Tax Regime in the recent Union Budget, deciding between the Old and New tax systems has become crucial for salaried employees. Use this calculator to input your gross salary and deductions (80C, HRA, NPS, etc.) to definitively see which regime minimizes your tax liability.

Last verified: June 2026 · Updated for FY 2025-26
Income & Deductions
Old Regime Exemptions (Not applicable in New)

Recommendation

Go with the New Regime

You save ₹42,900 in taxes.

Tax under Old Regime

₹1,40,400

Taxable Income: ₹10,75,000

Tax under New Regime

₹97,500

Taxable Income: ₹14,25,000

Tax Liability Comparison

Detailed Guide to Tax Comparison Calculator

The Indian income tax system offers salaried individuals a choice between two distinct tax frameworks: the Old Tax Regime and the New Tax Regime. Choosing the correct regime is one of the most critical financial decisions an employee makes every financial year. The Old Regime encourages tax-saving investments by allowing various exemptions like House Rent Allowance (HRA), Section 80C investments (PPF, ELSS, EPF), Section 80D (health insurance), and Section 24B (home loan interest). Conversely, the New Regime provides lower, more staggered tax slab rates and a higher rebate under Section 87A, but explicitly removes most of these deductions.

To effectively determine the optimal regime, you must project your gross annual salary and aggregate all eligible deductions. PaisaPlanner’s Tax Comparison Calculator is engineered specifically for the Indian ecosystem to simplify this exact process. Unlike cloud-based calculators that may log your financial data, PaisaPlanner executes all computations entirely locally within your browser. This ensures maximum privacy for your sensitive income data. Our tool instantly processes your inputs, identifies the regime with the lowest total tax liability (including Health and Education Cess), and quantifies your exact savings. By comparing the net tax outcomes side-by-side, you can confidently declare your preferred regime to your employer or use it during your Income Tax Return (ITR) filing.

The Mathematical Formula Behind the Tool

PaisaPlanner’s calculation engine strictly mirrors the Income Tax Department's prescribed methodology. The computation follows a procedural sequence applied independently to both regimes:

First, we determine the Gross Taxable Income:

Taxable Income (Old)=Gross Salary(Standard Deduction [Rs. 50,000]+HRA+80C+80CCD(1B)+80D+24B+Other Deductions)\text{Taxable Income (Old)} = \text{Gross Salary} - (\text{Standard Deduction [\text{Rs. }50,000]} + \text{HRA} + \text{80C} + \text{80CCD(1B)} + \text{80D} + \text{24B} + \text{Other Deductions}) Taxable Income (New)=Gross SalaryStandard Deduction (New Regime)\text{Taxable Income (New)} = \text{Gross Salary} - \text{Standard Deduction (New Regime)}

Next, the taxable income is distributed across progressive tax slabs. For any given slab defined by a min and max threshold, the tax is calculated as:

Tax for Slab=min(Remaining Income,Slab MaxSlab Min+1)×Slab Rate\text{Tax for Slab} = \min(\text{Remaining Income}, \text{Slab Max} - \text{Slab Min} + 1) \times \text{Slab Rate}

The total base tax is the sum of tax calculated across all applicable slabs. After determining the base tax, the engine evaluates the Section 87A Rebate. If the Taxable Income is less than or equal to the regime-specific REBATE_87A_INCOME_LIMIT, a rebate is applied up to the REBATE_87A_MAX_AMOUNT. The tax after rebate becomes:

Tax After Rebate=Base TaxRebate 87A\text{Tax After Rebate} = \text{Base Tax} - \text{Rebate 87A}

Finally, the 4% Health and Education Cess is levied on the post-rebate tax:

Total Tax=Tax After Rebate+(Tax After Rebate×0.04)\text{Total Tax} = \text{Tax After Rebate} + (\text{Tax After Rebate} \times 0.04)

The calculator processes both regime logic paths simultaneously and compares the Total Tax values to recommend the most cost-efficient option.

Practical Case Study (How it Works)

Let us examine a real-world scenario to understand how deductions dictate the optimal regime. Consider Ananya, an IT professional earning a Gross Annual Salary of Rs. 15,00,000 (15 Lakhs). Ananya has standard tax-saving investments: Rs. 1,50,000 under Section 80C (PPF and ELSS), Rs. 50,000 in NPS (Section 80CCD 1B), and pays Rs. 25,000 for medical insurance (Section 80D). She also claims a moderate HRA exemption of Rs. 1,50,000.

Under the New Tax Regime: Ananya receives the New Regime Standard Deduction (Rs. 75,000). All other exemptions are ignored.

Taxable Income=Rs. 15,00,000Rs. 75,000=Rs. 14,25,000\text{Taxable Income} = \text{Rs. 15,00,000} - \text{Rs. 75,000} = \text{Rs. 14,25,000}

Applying the new tax slabs progressively yields a specific base tax. Since Rs. 14.25 Lakhs exceeds the New Regime 87A rebate limit, no rebate applies. With 4% cess added, the total tax amounts to approximately Rs. 1,30,000 (based on standard new slab rates).

Under the Old Tax Regime: Ananya utilizes her full suite of deductions: Rs. 50,000 (Standard Deduction) + Rs. 1,50,000 (HRA) + Rs. 1,50,000 (80C) + Rs. 50,000 (NPS) + Rs. 25,000 (80D). Total Deductions=Rs. 4,25,000\text{Total Deductions} = \text{Rs. 4,25,000}.

Taxable Income=Rs. 15,00,000Rs. 4,25,000=Rs. 10,75,000\text{Taxable Income} = \text{Rs. 15,00,000} - \text{Rs. 4,25,000} = \text{Rs. 10,75,000}

The first Rs. 2.5L is tax-free. The next Rs. 2.5L is taxed at 5% (Rs. 12,500). The next Rs. 5L is taxed at 20% (Rs. 1,00,000). The remaining Rs. 75,000 is taxed at 30% (Rs. 22,500).

Base Tax=Rs. 12,500+Rs. 1,00,000+Rs. 22,500=Rs. 1,35,000\text{Base Tax} = \text{Rs. 12,500} + \text{Rs. 1,00,000} + \text{Rs. 22,500} = \text{Rs. 1,35,000}

Since income exceeds ₹5,00,000, no 87A rebate applies. Adding 4% cess (₹5,400) results in a Total Tax of ₹1,40,400.

In this case, despite significant investments, the New Regime saves Ananya over ₹10,000. However, if Ananya additionally had a ₹2,00,000 Home Loan Interest deduction (Section 24B), her Old Regime taxable income would drop to ₹8,75,000, drastically reducing her Old Regime tax and flipping the recommendation.

Formula & How It Works

Formula
Old Regime Tax=Slab Tax(Gross SalaryStd. Ded.50KHRA80C80D24B80CCD(1B)Others)×1.04New Regime Tax=Slab Tax(Gross SalaryStd. Ded.75K)×1.04\text{Old Regime Tax} = \text{Slab Tax}\left(\text{Gross Salary} - \text{Std. Ded.}_{50K} - \text{HRA} - \text{80C} - \text{80D} - \text{24B} - \text{80CCD(1B)} - \text{Others}\right) \times 1.04 \quad | \quad \text{New Regime Tax} = \text{Slab Tax}\left(\text{Gross Salary} - \text{Std. Ded.}_{75K}\right) \times 1.04

Old Regime Deductions — Section 80C (up to Rs. 1,50,000 for PPF, ELSS, EPF, LIC, etc.), Section 80D (Rs. 25,000 for self/family health insurance, Rs. 50,000 for senior citizen parents), HRA exemption under Section 10(13A), Section 24(b) (up to Rs. 2,00,000 home loan interest for self-occupied property), Section 80CCD(1B) (additional Rs. 50,000 for NPS contribution).

Old Regime Standard Deduction — A flat Rs. 50,000 deduction available to all salaried employees, introduced in Budget 2018.

New Regime Standard Deduction — A flat Rs. 75,000 deduction (enhanced from Rs. 50,000 in Budget 2024). This is the only major deduction available; all other exemptions like HRA, 80C, 80D, and 24(b) are forfeited.

Slab Tax — Taxable income is distributed across progressive income slabs specific to each regime. Old Regime slabs: 0% up to Rs. 2.5L, 5% for Rs. 2.5L–5L, 20% for Rs. 5L–10L, 30% above Rs. 10L. New Regime slabs: 0% up to Rs. 3L, 5% for Rs. 3L–7L, 10% for Rs. 7L–10L, 15% for Rs. 10L–12L, 20% for Rs. 12L–15L, 30% above Rs. 15L.

Section 87A Rebate — Old Regime: up to Rs. 12,500 rebate if taxable income ≤ Rs. 5,00,000. New Regime: significantly higher rebate making income up to Rs. 12,00,000 effectively tax-free.

Health & Education Cess — A flat 4% cess is levied on the tax amount after rebate in both regimes, contributing to the final tax liability.

Worked Example

Consider Ananya, an IT professional with Gross Annual Salary = Rs. 15,00,000 (15 LPA). Her deductions: Section 80C = Rs. 1,50,000 (PPF + ELSS), Section 80D = Rs. 25,000 (health insurance), HRA Exemption = Rs. 1,80,000, Section 24(b) Home Loan Interest = Rs. 1,50,000.

OLD REGIME: Standard Deduction = Rs. 50,000. Total Deductions = Rs. 50,000 + Rs. 1,50,000 + Rs. 25,000 + Rs. 1,80,000 + Rs. 1,50,000 = Rs. 5,55,000.

Old Regime Taxable Income = Rs. 15,00,000 − Rs. 5,55,000 = Rs. 9,45,000.

Old Regime Slab Tax: Rs. 0–2.5L = Rs. 0 | Rs. 2.5L–5L = Rs. 12,500 (5%) | Rs. 5L–9.45L = Rs. 89,000 (20%). Base Tax = Rs. 1,01,500.

No 87A rebate (income > Rs. 5L). Add 4% cess: Rs. 1,01,500 × 1.04 = Rs. 1,05,560. Old Regime Total Tax = Rs. 1,05,560.

NEW REGIME: Standard Deduction = Rs. 75,000. No other deductions allowed. Taxable Income = Rs. 15,00,000 − Rs. 75,000 = Rs. 14,25,000.

New Regime Slab Tax: Rs. 0–3L = Rs. 0 | Rs. 3L–7L = Rs. 20,000 (5%) | Rs. 7L–10L = Rs. 30,000 (10%) | Rs. 10L–12L = Rs. 30,000 (15%) | Rs. 12L–14.25L = Rs. 45,000 (20%). Base Tax = Rs. 1,25,000.

No 87A rebate (income > Rs. 12L). Add 4% cess: Rs. 1,25,000 × 1.04 = Rs. 1,30,000. New Regime Total Tax = Rs. 1,30,000.

RESULT: Old Regime saves Ananya Rs. 1,30,000 − Rs. 1,05,560 = Rs. 24,440 per year. The Old Regime wins here because her total deductions (Rs. 5,55,000) significantly exceed the break-even threshold of ~Rs. 3,75,000.

Benefits of Using Old vs New Tax Regime Calculator

Make a data-driven regime choice — Instead of relying on generic advice, compare your exact tax liability under both regimes side-by-side with your actual salary and deductions, ensuring you pick the one that puts more money in your pocket.
Avoid overpaying tax by thousands of rupees — Choosing the wrong regime can cost you Rs. 10,000 to Rs. 50,000+ in unnecessary taxes every year, especially for employees earning between Rs. 10–20 LPA where the optimal choice varies significantly.
Understand your break-even deduction level — The calculator reveals the exact deduction amount (typically Rs. 3,75,000–Rs. 4,25,000) at which the Old Regime starts becoming more beneficial than the New Regime for your income level.
Plan investments strategically for the financial year — By knowing which regime suits you, you can decide whether to invest in Section 80C instruments (PPF, ELSS), pay health insurance premiums (80D), or maximize NPS contributions (80CCD) — or skip them entirely if the New Regime is better.
Identify which deductions to prioritize — The comparison highlights which specific deductions (HRA, home loan interest, 80C) have the most impact on reducing your Old Regime tax, helping you allocate your savings budget efficiently.

Common Mistakes to Avoid

Choosing the Old Regime without having Rs. 3,75,000+ in total deductions — If your combined deductions (80C + 80D + HRA + 24B + NPS) do not exceed approximately Rs. 3,75,000–Rs. 4,25,000, the New Regime's lower slab rates will almost always result in lower tax. Many employees default to the Old Regime out of habit, losing thousands.
Forgetting that the New Regime offers Rs. 12,00,000 zero-tax benefit via Section 87A rebate — Under the New Regime, taxable incomes up to Rs. 12,00,000 (after Rs. 75,000 standard deduction, i.e., gross salary up to Rs. 12,75,000) attract zero tax thanks to the enhanced 87A rebate. Many taxpayers are unaware of this substantial benefit.
Not recalculating every year as salary and deductions change — Your optimal regime can flip from one year to the next due to salary increments, loss of HRA (if you buy a house), changes in home loan interest, or changes in 80C investment capacity. Treating regime selection as a one-time decision is a costly mistake.
Assuming the Old Regime is always better for home loan holders — While Section 24(b) allows up to Rs. 2,00,000 deduction on home loan interest, this alone is not enough to make the Old Regime beneficial. You need the full stack of deductions (80C + 80D + HRA + 24B) to surpass the break-even point.
Ignoring employer NPS contribution benefit available in both regimes — Employer's contribution to NPS under Section 80CCD(2) — up to 10% of Basic+DA for private sector or 14% for government — is deductible in BOTH regimes. Many employees overlook this, missing out on a tax benefit that works regardless of regime choice.

Frequently Asked Questions