The Union Budget 2024 made the new tax regime even more attractive with an increased standard deduction of ₹75,000 for salaried employees. Yet for taxpayers with significant deductions — home loan interest, HRA, 80C investments, 80D insurance premiums — the old regime can still save more. Here is a complete side-by-side comparison.
New Tax Regime Slabs (FY 2024-25)
Income up to ₹3 lakh: 0% | ₹3–7 lakh: 5% | ₹7–10 lakh: 10% | ₹10–12 lakh: 15% | ₹12–15 lakh: 20% | Above ₹15 lakh: 30%. Plus 4% Health & Education Cess on the total tax.
Important: Section 87A rebate means zero tax for income up to ₹7 lakh under the new regime. With the ₹75,000 standard deduction for salaried individuals, effective zero-tax income threshold is ₹7.75 lakh.
Old Tax Regime Slabs (FY 2024-25)
Income up to ₹2.5 lakh: 0% | ₹2.5–5 lakh: 5% | ₹5–10 lakh: 20% | Above ₹10 lakh: 30%. Plus 4% cess. Under the old regime, the standard deduction is ₹50,000 (lower than new regime).
Key Deductions Available Only in Old Regime
Section 80C (up to ₹1.5 lakh): PPF, ELSS, EPF, LIC premium, home loan principal, children's tuition fees. Section 80D (up to ₹25,000 for self/family, ₹50,000 for parents above 60): health insurance premiums. Section 24(b) (up to ₹2 lakh): home loan interest on self-occupied property. HRA exemption: partially or fully exempt based on actual HRA, rent paid, and city.
Section 80CCD(1B) (up to ₹50,000): NPS contributions — this exclusive NPS deduction is available in old regime only and is over and above the 80C limit. Section 80TTA (up to ₹10,000): interest on savings bank account.
When New Regime Wins
The new regime is clearly better if you have very low deductions — typically for young professionals starting out, those renting in tier-2/3 cities (low HRA benefit), or those who don't invest in 80C instruments beyond EPF. If your total deductions are below ₹1.5 lakh, the new regime almost always results in lower tax.
When Old Regime Wins
The old regime beats the new regime when your deductions are substantial. Rule of thumb: if your total deductions exceed ₹3.75 lakh for income in the ₹10–15 lakh bracket, the old regime saves more. A typical combination that tips the scale: 80C (₹1.5 lakh) + Home loan interest (₹2 lakh) + HRA (₹1 lakh) + 80D (₹25,000) + NPS 80CCD(1B) (₹50,000) = ₹5.25 lakh total deductions — old regime wins significantly here.
Practical Comparison at ₹12 Lakh CTC
Salaried employee, ₹12 lakh CTC, paying rent in Mumbai. Old regime: after ₹50,000 standard deduction, ₹1.5 lakh 80C, ₹1.8 lakh HRA exemption, ₹20,000 80D = taxable income ₹8.4 lakh. Tax = ~₹73,400 + cess = ₹76,336. New regime: after ₹75,000 standard deduction = ₹11.25 lakh taxable. Tax = ₹1,17,500 + cess = ₹1,22,200. Old regime saves ₹45,864 here.
How to Decide
Use CalcSmart's Income Tax Calculator — it calculates your liability under both regimes simultaneously. Simply enter your income and tick the deductions you claim, and it shows you exactly which regime is cheaper and by how much. The decision takes less than 2 minutes.
You can switch regimes every year if you are a salaried employee (inform your employer by April 1 each year). If you have business income, you can only switch once — choose carefully.