Old vs New Tax Regime in India: Calculating Breakeven Deductions with Python
India's new tax regime is the default, but many salaried individuals may still pay less under the old regime. The breakeven point is the level of deductions needed for the old regime to beat the new one, and it can be calculated with a short Python script. The article outlines FY 2025-26 rules for salaried residents, covering standard deductions, slab rates, and rebates under both regimes, with health and education cess applied to each. Results show the new regime is hard to beat up to about Rs 12.75 lakh of salary, while higher earners need substantial deductions such as HRA and home-loan interest to benefit from the old regime. The author notes that real-world calculations are more complex and advises checking current rules or consulting a Chartered Accountant before filing.
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