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% / 30%) split across narrower bands, but no 80C/80D/HRA/home loan interest deductions. Standard deduction is ₹75,000. Section 87A rebate makes income up to ₹7 lakh tax-free.
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.
FY 2024-25 Slab Comparison
New Regime Slabs (2024-25)
₹0 – 3L: nil. ₹3L – 7L: 5%. ₹7L – 10L: 10%. ₹10L – 12L: 15%. ₹12L – 15L: 20%. Above ₹15L: 30%.
Standard deduction ₹75,000. Section 87A rebate makes tax zero for taxable income up to ₹7L.
Old Regime Slabs (2024-25)
₹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. Higher exemptions don't apply in the new regime — same ₹3L for everyone.
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 — Old Regime Wins
Old regime — taxable income ₹8L − ₹50K (std) − ₹2.25L (80C+NPS+80D) − ₹50K (HRA avg) = ₹4.75L. Tax = ₹0 (under ₹5L 87A rebate cliff).
New regime — taxable ₹8L − ₹75K = ₹7.25L. Tax = ₹15K + 4% cess = ₹15,600.
Old regime saves ₹15,600.
₹15 Lakh Income — New Regime Often Wins
Old regime — taxable ₹15L − ₹50K − ₹2.25L − ₹50K = ₹11.75L. Tax = ₹1,77,500 + cess = ₹1,84,600.
New regime — taxable ₹15L − ₹75K = ₹14.25L. Tax = ₹1,42,500 + cess = ₹1,48,200.
New regime saves ₹36,400.
₹25 Lakh Income — Old Regime Wins With Full Deductions
Old regime — taxable ₹25L − ₹50K − ₹2.25L − ₹50K − ₹2L (home loan interest) = ₹19.75L. Tax = ₹4.17L + cess = ₹4,33,680.
New regime — taxable ₹25L − ₹75K = ₹24.25L. Tax = ₹4.17L + cess = ₹4,33,680.
Tied at ₹25L — but only because we assumed full home loan interest. Without it, new regime wins by ₹60K.
₹50 Lakh Income — New Regime With Surcharge Math
Old regime — taxable ₹50L − full deductions ₹5.25L = ₹44.75L. Tax = ₹11.32L + cess = ₹11,77,520. (Under ₹50L taxable, no surcharge.)
New regime — taxable ₹50L − ₹75K = ₹49.25L. Tax = ₹11.40L + cess = ₹11,86,080.
Old regime saves ₹8,560 — but only with full deductions claimed. Without home loan, new regime wins by a similar margin.
The Decision Rule of Thumb
After running thousands of scenarios across both regimes, a simple rule emerges:
- Income < ₹7.5L — New regime usually wins (87A rebate gets you to zero tax).
- Income ₹7.5L – ₹15L — New regime almost always wins unless you use the entire ₹2L home loan interest deduction.
- Income ₹15L – ₹25L — New regime wins if you don't have a home loan; old regime wins if you do.
- Income > ₹25L — Depends entirely on home loan interest amount. Above ₹50L, surcharge tiers also matter.
The difference can be ₹30,000 to ₹1,00,000 per year — well worth 5 minutes with a calculator. Pick wrong, and that's a real chunk of money walking away every year.
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.
Open Income Tax India