How to Save Tax on a 15 Lakh Salary (FY 2025-26) - New vs Old Regime

A ₹15 lakh salary puts you squarely in the zone where your regime choice, not just your investments, decides your tax bill for FY 2025-26. The revamped new regime is now the default, and for most people earning around ₹15 lakh it quietly wins - you pay roughly ₹97,500 in tax without doing anything, and without locking money into any product. The old regime can still beat it, but only if your legitimate deductions are large enough. This guide walks through exactly how the two regimes stack up at ₹15 lakh, the deduction threshold where old overtakes new, a full worked example, and a clean checklist of tax-saving avenues that are actually worth using. The goal is not to chase deductions blindly - it is to make an informed, numbers-backed choice.

The two regimes at a glance for FY 2025-26#

For FY 2025-26 the new regime offers a standard deduction of ₹75,000 and, thanks to the Section 87A rebate, makes taxable income up to ₹12,00,000 effectively tax-free (rebate of up to ₹60,000). Its slabs are: ₹0-4L nil, ₹4-8L at 5%, ₹8-12L at 10%, ₹12-16L at 15%, ₹16-20L at 20%, ₹20-24L at 25%, and above ₹24L at 30%. The catch is that it disallows almost every deduction - no 80C, no HRA, no home loan interest on a self-occupied house - with the one useful exception of the employer's NPS contribution under 80CCD(2). The old regime gives a smaller ₹50,000 standard deduction but keeps the full deduction toolkit: 80C up to ₹1.5L, 80D health insurance, an extra ₹50,000 for NPS under 80CCD(1B), HRA exemption, and home loan interest up to ₹2L under Section 24. Its slabs are ₹0-2.5L nil, ₹2.5-5L at 5%, ₹5-10L at 20%, and above ₹10L at 30%, with the 87A rebate only up to ₹5L taxable.

• New regime: standard deduction ₹75,000, income up to ₹12L effectively tax-free, but no 80C/HRA/home loan deductions.
• Old regime: standard deduction ₹50,000, full deductions (80C, 80D, NPS, HRA, home loan interest), but higher slab rates.
• New regime is the default - you must actively opt for old if it suits you better.

What you actually pay under the new regime at 15 lakh#

Start with the simple case. On a ₹15,00,000 salary the new regime gives you a ₹75,000 standard deduction, leaving taxable income of ₹14,25,000. Tax builds slab by slab: nothing on the first ₹4L, 5% of the ₹4-8L band is ₹20,000, 10% of the ₹8-12L band is ₹40,000, and 15% on the remaining ₹2,25,000 (from ₹12L to ₹14.25L) is ₹33,750. That totals ₹93,750, and adding 4% health and education cess brings it to roughly ₹97,500. No investment, no lock-in, no paperwork - this is your baseline number to beat. Because the 87A rebate only clears income up to ₹12L, a ₹15 lakh earner does not benefit from it here, so the full slab tax applies.

When the old regime beats the new one#

The old regime only wins if your total deductions are large enough to drag taxable income down past the higher slab rates. As a rough rule at ₹15 lakh, the old regime starts to beat the new one once your combined old-regime deductions (standard deduction plus 80C, 80D, NPS 80CCD(1B), HRA, and home loan interest) cross roughly ₹4 to ₹4.5 lakh. Below that, the new regime's lower rates and bigger standard deduction keep it ahead. This is why the honest answer to 'which regime saves more' is always 'it depends on your actual deductions'. Someone paying real rent in a metro with a home loan and full 80C can comfortably cross the threshold; someone with only EPF and a small insurance premium usually cannot.

• Under ~₹4L of deductions: new regime almost always wins.
• Around ₹4-4.5L of deductions: the two are close - compare precisely.
• Above ~₹4.5L of deductions (large HRA plus home loan plus full 80C/NPS): old regime can pull ahead.

A worked example - old regime with strong deductions#

Take a metro employee on ₹15,00,000 with basic salary of ₹7,50,000, HRA received of ₹3,00,000, and rent paid of ₹3,00,000. HRA exemption is the least of: actual HRA (₹3,00,000), rent paid minus 10% of basic (₹3,00,000 - ₹75,000 = ₹2,25,000), or 50% of basic for a metro (₹3,75,000) - so ₹2,25,000 is exempt. Now stack the deductions: standard deduction ₹50,000, HRA exemption ₹2,25,000, 80C ₹1,50,000 (EPF plus ELSS plus insurance), 80D ₹25,000, NPS 80CCD(1B) ₹50,000, and home loan interest ₹2,00,000 under Section 24. Total deductions come to ₹7,00,000, cutting taxable income to ₹8,00,000. Old-regime tax on ₹8,00,000 is ₹12,500 (5% of the ₹2.5-5L band) plus ₹60,000 (20% of the ₹5-8L band) = ₹72,500, plus 4% cess = about ₹75,400. Against the new regime's ₹97,500, that is a saving of roughly ₹22,000 - but it required genuine rent, a live home loan, and fully deployed 80C and NPS. Change any one of those and the gap can vanish.

Your legitimate tax-saving checklist#

If you go the old-regime route, these are the avenues worth using - all legitimate, all backed by law. Deploy them for genuine financial reasons (protection, retirement, home), not just to shave tax, and keep documentation for every claim. Note that under the new regime only the employer NPS contribution under 80CCD(2) survives, so the list below mainly matters when the old regime is your better choice.

• 80C (up to ₹1,50,000): EPF, PPF, ELSS mutual funds, life insurance premium, 5-year tax-saver FD, and home loan principal repayment.
• 80D: health insurance premium - up to ₹25,000 for self and family, plus up to ₹50,000 for senior-citizen parents.
• 80CCD(1B): an extra ₹50,000 for NPS, over and above the 80C limit.
• HRA exemption: least of actual HRA, rent paid minus 10% of basic, or 50% of basic (metro) / 40% (non-metro) - needs real rent and rent receipts.
• Section 24 home loan interest: up to ₹2,00,000 on a self-occupied house.
• 80CCD(2): employer's NPS contribution - the one deduction still allowed under the new regime.

Compare with your real numbers before deciding#

The threshold figures here are guides, not guarantees - your exact basic pay, city, rent, loan interest, and investments shift the break-even point. The only reliable way to choose is to run both regimes with your actual salary structure and deductions. Enter your figures, compare the tax under each regime side by side, and see whether your deductions clear the roughly ₹4-4.5 lakh mark that lets the old regime win at ₹15 lakh. If you are still building your deduction stack, the new regime's ₹97,500 is your simple fallback with no strings attached.

Understand your take-home too#

Tax is only one part of the picture - your in-hand pay also depends on EPF, professional tax, and how your CTC splits into basic, HRA, and allowances. A higher basic raises your HRA exemption and EPF but can change your take-home, so it is worth modelling the full structure alongside your tax choice. Break down your salary components first, then feed the taxable figure into the tax comparison for a complete view of what actually lands in your account each month.