1. FY 2025-26 — the slabs at a glance
**New regime (default):** ₹0-3L: 0%, ₹3-7L: 5%, ₹7-10L: 10%, ₹10-12L: 15%, ₹12-15L: 20%, ₹15L+: 30%. Standard deduction ₹75,000. Rebate u/s 87A up to ₹7L taxable income → effectively zero tax up to ₹7L gross. **Old regime:** ₹0-2.5L: 0%, ₹2.5-5L: 5%, ₹5-10L: 20%, ₹10L+: 30%. Standard deduction ₹50,000. Plus 80C/80D/HRA/24(b)/NPS deductions stack.
2. The breakeven rule
Old regime wins ONLY if your total deductions (80C + 80D + HRA + 24(b) + NPS + 80E + 80EE) exceed roughly **₹4-5 lakh**. Below that threshold, the lower slabs in the new regime mathematically win. Run our Tax Regime Comparator — it does this calculation in 5 seconds.
3. Three real examples
**₹10L gross, no investments**: New regime wins by ₹47,000/year. **₹15L gross with ₹2L 80C + ₹2L HRA + ₹50K NPS**: Old regime wins by ₹38,000/year. **₹40L gross with all deductions maxed**: Old regime wins by ₹62,000/year. Above ₹50L, the new regime almost always wins because the surcharge structure is cleaner.
4. The 4 deductions you should NEVER lose
**80C** (₹1.5L): EPF + ELSS + PPF + 5-yr tax-saver FD. **80D** (₹25K self + ₹50K parents 60+): health insurance. **HRA** (section 10(13A)): only if you pay rent and live in a metro/non-metro. **24(b)** (₹2L): home-loan interest on self-occupied property. Stack these and the old regime usually beats new for incomes between ₹12-30 lakh.
5. The new regime's hidden upside
If you don't have rent / loans / kids — the new regime is pure simplicity. No documentation. No proofs. No HRA verification. For a single 28-year-old with no major deductions, switching to new can save 3-5 hours of paperwork every March.
6. Use the calculators — don't guess
Run all three: Tax Regime Comparator for the verdict, Income Tax Calculator for the slab math, and HRA Calculator to see if HRA alone tilts the answer. MyFolio360's Smart Planner runs them automatically using your verified income/expense/investment data — no manual entry.