Old vs. New Tax Regime: Comparative Guide (Budget 2026 Slabs)

Determining whether to file under the default New Tax Regime or opt for the traditional Old Tax Regime is one of the most critical tax planning decisions for Indian salaried employees, corporate professionals, and business owners every fiscal year. Under the **Union Budget 2026**, the Indian Government maintained the tax slabs from the previous budget, cementing the New Tax Regime as the default choice while keeping the Old Tax Regime as an optional track.

The decision relies on a mathematical trade-off: The New Tax Regime offers lower tax rates across expanded slabs but surrenders almost all standard deductions. The Old Tax Regime levies higher tax rates but allows you to reduce your taxable income using House Rent Allowance (HRA), Section 80C investments, Home Loan interest, and Health Insurance premiums.

In this comprehensive guide, we will break down the active slab rates for **FY 2026-27 (AY 2027-28)**, analyze Section 87A rebate rules, detail allowed vs. disallowed deductions, and identify the break-even indifference points to help you choose the best regime.

1. Tax Slab Structures Compared (FY 2026-27 / AY 2027-28)

The table below illustrates the side-by-side tax rate structures under both regimes. Note how the New Tax Regime contains wider brackets and lower rates, whereas the Old Tax Regime spikes to 20% once income crosses ₹5 Lakh.

2. The Impact of Section 87A Rebate & Marginal Relief

Section 87A provides a tax rebate that reduces tax liability to zero for low-to-middle income earners. Under the New Tax Regime, this rebate threshold is significantly higher:

• New Tax Regime: Taxpayers with a net taxable income of up to **₹7,00,000** claim a rebate of up to ₹25,000, making their net tax zero. Salaried employees also claim a ₹75,000 standard deduction, meaning a gross salary of up to **₹7,75,000** has zero tax liability.
• Old Tax Regime: Taxpayers with a taxable income of up to **₹5,00,000** claim a rebate of up to ₹12,500, resulting in zero tax liability. Salaried employees claim a ₹50,000 standard deduction under the Old Regime, bringing the tax-free limit to **₹5,50,000**.

3. Exemptions Disallowed in the New Tax Regime

To benefit from the lower slab rates of the New Tax Regime, you must surrender the majority of popular tax-saving deductions. The table below lists the primary exemptions you lose vs. what remains:

4. Finding Your Break-Even Indifference Point

The choice of regime depends on your total eligible deductions. The "break-even indifference point" is the specific amount of deductions at which your net tax liability is identical under both regimes.

If your actual tax deductions are **higher** than the break-even point, the **Old Tax Regime** is more beneficial. If your actual deductions are **lower**, the **New Tax Regime** is the superior option.

Standard Indifference Points for Salaried Earners:

• Income up to ₹7.5 Lakh: Indifference point is zero. The New Regime is always better because tax is zero.
• Income of ₹10 Lakh: The break-even deduction limit is **₹2,50,000**. If you invest less than this in 80C, HRA, or home loans, choose the New Regime.
• Income of ₹15 Lakh: The break-even deduction limit is **₹3,75,000**.
• Income above ₹20 Lakh: The break-even deduction limit settles at **₹4,25,000**. Since it is difficult for most taxpayers to claim deductions above ₹4.25 Lakh (given the ₹1.5L cap on 80C and ₹2L cap on self-occupied home loans), the New Tax Regime is generally superior for high-income earners.

5. Presumptive Taxation Rules u/s 44AD and 44ADA

For self-employed professionals, freelancers, and small business owners, the choice of regime also affects presumptive tax limits:

• Section 44AD (Small Businesses): Allows you to declare profits at a flat 8% (or 6% for digital receipts) of your total gross turnover up to ₹3 Crore (if cash receipts are $\le$ 5%), without maintaining formal books of account.
• Section 44ADA (Professionals): Allows doctors, lawyers, CAs, and IT consultants to declare profits at a flat 50% of gross receipts up to ₹75 Lakh.

Under both presumptive schemes, the **New Tax Regime** is the default filing setting. If you want to declare profits under the Old Regime, you must file a dedicated Form 10-IEA prior to filing your Income Tax Return.

6. Simplify Your Tax & Invoicing Audits with TrulyInvoice

Whether your business declares expenses under actual filing methods or presumptive schemes, keeping raw receipt data organized is crucial for year-end tax computations. Manual receipt logging leads to missing claims, double entries, and audit discrepancies.

TrulyInvoice automates your purchase logging and bookkeeping operations. By dragging your purchase invoices onto our platform, our AI OCR extracts vendor details, line items, and tax rates, matching them with your ledger spelling to sync directly to Tally Prime.

Save hours of year-end compilation time. Keep your audit trail spotless with TrulyInvoice for a flat rate of plans starting at ₹399/month.