Old vs New Tax Regime FY 2025-26: The Deduction Breakeven
The return you're filing right now — FY 2025-26, AY 2026-27 — is the first where the new regime hands you zero tax up to ₹12.75 lakh, and it's the default. So for anyone earning ₹15 lakh and up, the real question isn't "which regime is better." It's a single number: how much deduction must you claim before the old regime claws back the lead. Clear that number and old wins. Fall short and you overpay — every year you repeat the mistake.
Summary: the deductions you need for old regime to win
| Gross salary | New-regime tax (incl. cess) | Deductions* needed for old to beat new |
|---|---|---|
| ₹12.75 lakh | ₹0 (87A rebate) | Old can't beat zero |
| ₹15 lakh | ₹97,500 | ₹5.44 lakh |
| ₹20 lakh | ₹1,92,400 | ₹7.08 lakh |
| ₹25 lakh | ₹3,19,800 | ₹8.00 lakh |
| ₹30 lakh | ₹4,75,800 | ₹8.00 lakh |
*Deductions over and above the standard deduction — your 80C, 80D, HRA under 10(13A), home-loan interest under 24(b), 80CCD(1B), added up.
Two things jump out. The breakeven climbs with income, then flattens at ₹8 lakh once you're fully inside the 30% slab on both sides. And ₹8 lakh of genuine deductions is hard to assemble on salary alone — which is exactly why the new regime wins for most ₹15 lakh-plus earners who don't carry a home loan.
How to read your own breakeven
The new regime is now the default
Under Section 115BAC, if you do nothing you're taxed on the new regime: a ₹75,000 standard deduction (against ₹50,000 in the old), a full Section 87A rebate up to ₹12 lakh of taxable income, and slabs that hit 30% only above ₹24 lakh. To use the old regime you must actively select it in the ITR. As a salaried filer with no business income, you can switch every single year — so this is a fresh decision each filing, not a one-time lock.
Add up only the deductions the old regime allows
The new regime disallows almost everything: 80C, 80D, HRA, LTA, home-loan interest on a self-occupied house. So the "deductions needed" column is the sum of exactly those. For a salaried person without a home loan, the realistic ceiling is roughly 80C ₹1.5 lakh + 80CCD(1B) NPS ₹50,000 + 80D ₹25,000–₹75,000 — about ₹2.25–2.75 lakh. That is nowhere near ₹5.44 lakh, let alone ₹8 lakh.
The home loan is what moves the needle
Section 24(b) lets you deduct up to ₹2 lakh of interest on a self-occupied home loan, and that single line is what pushes a ₹15 lakh earner toward the ₹5.44 lakh breakeven. Stack ₹2 lakh (24(b)) + ₹1.5 lakh (80C, which your principal repayment already feeds) + ₹50,000 (80CCD(1B)) + ₹75,000 (80D for self plus senior-citizen parents) and you reach ₹4.75 lakh — close at ₹15 lakh income, still short at ₹20 lakh-plus.
The one lever that works in both regimes: 80CCD(2)
Employer NPS contribution under Section 80CCD(2) is the rare deduction the new regime keeps — and it's more generous there: up to 14% of basic salary, against 10% in the old regime. On a ₹12 lakh basic that's ₹1.68 lakh shaved off taxable income without touching your take-home, inside the regime you were probably going to pick anyway. Ask payroll to route part of your CTC through employer NPS before you obsess over the old regime.
When the old regime still wins
Three profiles clear the breakeven comfortably. One, you rent in a metro and claim HRA under 10(13A) — at ₹50,000/month rent on a ₹12 lakh basic, the exemption alone can cross ₹3 lakh. Two, you carry a home loan plus a let-out second-property loan whose full interest sets off against rental income. Three, you genuinely max 80C + 80CCD(1B) + 80D + 24(b) together. If two or more apply, run the old regime — it can still beat new by ₹50,000-plus at ₹20 lakh income.
Real example: Salaried, ₹24 lakh, Bengaluru, has a home loan
| Item | Old regime | New regime |
|---|---|---|
| Gross salary | ₹24,00,000 | ₹24,00,000 |
| Deductions (incl. standard) | ₹5,00,000 | ₹75,000 |
| Taxable income | ₹19,00,000 | ₹23,25,000 |
| Tax incl. 4% cess | ₹3,97,800 | ₹2,92,500 |
Even with a ₹4.5 lakh deduction stack — full 80C, ₹2 lakh of home-loan interest, NPS, family health cover — her breakeven was ₹7.88 lakh. She is ₹3.4 lakh short, so the new regime saves her ₹1,05,300 a year. Routing 14% of basic through employer NPS under 80CCD(2) would widen the gap further still.
What to do this week
- Pull your AIS and Form 26AS on the income-tax portal — most FY 2025-26 data reflects fully only after mid-June, so verify before you file.
- Total your old-regime deductions honestly: 80C, 80D, 24(b), HRA, 80CCD(1B). Compare the sum against the breakeven for your salary in the table above.
- If you fall short, file under the new regime — and ask HR to add employer NPS under 80CCD(2) for next year.
- Run both regimes in a reliable calculator before you submit. Salaried filers lock the choice for the year at filing, so don't guess.
Don't file on autopilot
The new regime being the default doesn't make it automatically right — but for ₹15 lakh-plus earners without a home loan, it usually is. The deadline is 31 July 2026, and the cost of picking the wrong regime is the gap you saw above, repeated for as long as you keep filing on autopilot.
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