Old vs New Tax Regime: Which One Actually Saves You More?
Since FY 2023-24, India has two parallel income tax systems. The new regime is the default, with lower slabs but no deductions; the old regime keeps higher slabs but lets you claim 80C, 80D, HRA, and home loan benefits. Which one wins for your specific income depends on a calculation most people skip — and getting it wrong costs ₹30,000 to ₹1 lakh per year for typical salaried incomes.
The Two Regimes At a Glance
Old regime — original system, higher slabs (5% / 20% / 30%), but with a buffet of deductions: 80C (₹1.5L), 80CCD(1B) NPS (₹50K), 80D health insurance, HRA exemption, home loan interest under Section 24, and several others. Standard deduction of ₹50,000 applies to salary income.
New regime — default since FY 2023-24, lower slabs (5% / 10% / 15% / 20% / 25% / 30%) split across narrower bands, but no 80C/80D/HRA/home loan interest deductions. Standard deduction is ₹75,000. Section 87A rebate makes taxable income up to ₹12 lakh tax-free — which, with the standard deduction, means a salary up to ₹12.75 lakh pays nothing at all.
The trade-off: lower slabs without deductions vs higher slabs with deductions. Whether you save more depends entirely on how many deductions you actually claim, and what your income level is.
The slabs for FY 2025-26 and FY 2026-27
New regime slabs
₹0 – 4L: nil. ₹4L – 8L: 5%. ₹8L – 12L: 10%. ₹12L – 16L: 15%. ₹16L – 20L: 20%. ₹20L – 24L: 25%. Above ₹24L: 30%.
Standard deduction ₹75,000. Section 87A rebate of up to ₹60,000 makes tax zero for taxable income up to ₹12L. Just above that line, marginal relief caps the tax at the amount by which your taxable income exceeds ₹12L — so there is no cliff to fall off.
These slabs were set by the Finance Act 2025 and Budget 2026 left them alone, so the same table applies to both FY 2025-26 and FY 2026-27.
Old regime slabs
₹0 – 2.5L: nil. ₹2.5L – 5L: 5%. ₹5L – 10L: 20%. Above ₹10L: 30%.
Standard deduction ₹50,000. Section 87A rebate makes tax zero for taxable income up to ₹5L. All deductions available.
60-79 years: basic exemption ₹3L. 80+ years: ₹5L. Those higher age-based exemptions exist only in the old regime — the new regime gives everyone the same ₹4L, regardless of age.
Worked Examples Across Income Levels
Let us run actual numbers for a salaried individual with full 80C (₹1.5L), 80CCD(1B) NPS (₹50K), 80D (₹25K), and HRA exemption averaging ₹50K — typical for a Bangalore/Mumbai/Delhi professional.
₹8 Lakh Income — Both Land at Zero
Old regime — taxable income ₹8L − ₹50K (std) − ₹2.25L (80C+NPS+80D) − ₹50K (HRA avg) = ₹4.75L. Tax = ₹0, under the ₹5L 87A rebate.
New regime — taxable ₹8L − ₹75K = ₹7.25L, comfortably under the ₹12L rebate limit. Tax = ₹0.
Tied at nil — and the new regime got there without you locking a rupee into 80C.
₹15 Lakh Income — New Regime Wins Clearly
Old regime — taxable ₹15L − ₹50K − ₹2.25L − ₹50K = ₹11.75L. Tax = ₹1,65,000 + 4% cess = ₹1,71,600.
New regime — taxable ₹15L − ₹75K = ₹14.25L. Tax = ₹93,750 + cess = ₹97,500.
New regime saves ₹74,100.
₹25 Lakh Income — New Regime Wins Even With a Home Loan
Old regime — taxable ₹25L − ₹50K − ₹2.25L − ₹50K − ₹2L (home loan interest) = ₹19.75L. Tax = ₹4,05,000 + cess = ₹4,21,200.
New regime — taxable ₹25L − ₹75K = ₹24.25L. Tax = ₹3,07,500 + cess = ₹3,19,800.
New regime saves ₹1,01,400 — and that is with the full ₹2L home loan interest claimed on the old side. Drop the home loan and the gap widens further.
₹50 Lakh Income — New Regime, By the Same Margin
Old regime — taxable ₹50L − full deductions ₹5.25L (incl. home loan interest) = ₹44.75L. Tax = ₹11,55,000 + cess = ₹12,01,200. (Taxable stays under ₹50L, so no surcharge.)
New regime — taxable ₹50L − ₹75K = ₹49.25L. Tax = ₹10,57,500 + cess = ₹10,99,800.
New regime saves ₹1,01,400. Above ₹24L taxable both regimes charge 30% at the margin, so the gap stops growing and settles at roughly ₹1 lakh a year.
The Decision Rule of Thumb
After running thousands of scenarios across both regimes, a simple rule emerges:
- Salary up to ₹12.75L — New regime wins outright: the 87A rebate takes the tax to zero, with no investment lock-ins required.
- ₹12.75L – ₹15L — New regime, unless your deductions are unusually large. At ₹15L you need more than about ₹5.45L of old-regime deductions (beyond the standard deduction) before the old regime catches up.
- ₹15L – ₹25L — New regime, including with a full ₹2L home loan interest claim. The old regime needs deductions approaching ₹8L to break even.
- Above ₹25L — New regime, and the saving flattens out near ₹1 lakh a year. Only genuinely exceptional deductions (roughly ₹8L+) flip it.
- The short version for FY 2025-26 onward: after the Budget 2025 slabs, the old regime wins for very few salaried people. Check your own numbers rather than assuming last year's answer still holds.
The difference runs to about ₹1 lakh a year at higher incomes — well worth 5 minutes with a calculator. And if you last compared regimes before the Budget 2025 slabs, your old answer may well have flipped.
Can You Switch Between Regimes?
Salaried individuals can switch between regimes every financial year by ticking the right box in the ITR. Your employer applies the regime you declare at the start of the year for TDS calculation; if you switch at filing, the TDS already deducted is just adjusted in the final liability.
Business or professional income — switching is more restrictive. You can switch from new to old regime once in a lifetime (and vice versa), but after that you are locked. This is to prevent regime-shopping by self-employed individuals as deductions vary.
Practically, salaried Indians should re-evaluate every March based on actual deductions claimed. The optimal regime can shift from year to year — say, when you take a home loan, when ELSS lock-ins mature, or when income crosses surcharge thresholds.
What to Do With This
Use the income tax calculator to compute both regimes for your specific income and deductions. The calculator will show you the rupee difference and pick the better one automatically.
If old regime wins, the 80C tax saver calculator helps you optimise the allocation of ₹2L+ across PPF, ELSS, EPF, NPS 80CCD(1B), and 80D health insurance. If new regime wins, you skip the optimisation entirely — simpler tax life.
And every March, run the calculator one more time before filing — your circumstances or the tax laws may have changed.
Compare regimes for your income
Our income tax calculator runs both old and new regimes side by side, picks the better one, and shows the exact tax saved.
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