Old Tax Regime

The old tax regime is India's pre-2020 income tax structure, featuring higher slab rates than the newer alternative but allowing a wide range of deductions, HRA exemption, Section 80C investments, 80D health insurance, and home loan interest among others. Since financial year 2023-24, the new regime became the default, meaning taxpayers who want the old regime's deduction-heavy structure must actively opt in.

Whether the old regime works out better depends entirely on how much you can actually deduct. A taxpayer with a large HRA claim, maxed-out 80C investments, and home loan interest often comes out ahead under the old regime despite its higher headline rates, while someone with few deductions to claim usually does better under the new regime's lower slabs.

Old Regime Tax = Tax on (Gross Income − HRA − 80C − 80D − Other Deductions) at Old Regime Slab Rates

A salaried employee earns ₹15,00,000 gross, claims ₹2,40,000 HRA exemption, ₹1,50,000 under Section 80C, and ₹25,000 under Section 80D.

• Net taxable income (old regime): ₹15,00,000 − ₹2,40,000 − ₹1,50,000 − ₹25,000 = ₹10,85,000
• Tax computed on this at old regime slabs would need to be compared directly against tax on the full ₹15,00,000 (minus standard deduction) at new regime slabs

For someone with this deduction profile, the old regime frequently comes out lower despite its steeper rate structure, but it's worth running both scenarios through the Old vs New Tax Regime Calculator rather than assuming.

• No longer the default, must be actively chosen. This flipped starting FY 2023-24, before that the old regime was the default and the new regime had to be chosen instead.
• Deductions only help if they're large enough to offset the higher rates. A taxpayer with minimal HRA, no home loan, and low 80C investment usually loses out staying in the old regime.
• Business income taxpayers face switching restrictions. Salaried individuals can pick a regime fresh each year, those with business or professional income have more limited ability to switch back once chosen.
• HRA exemption is exclusive to the old regime. This is often the single biggest factor tipping the comparison for salaried employees in high-rent cities.
• The comparison needs to be run every year, not assumed. Salary changes, new investments, or a change in home loan status can flip which regime is better from one year to the next.