Old vs New Tax Regime AY 2026-27: A Calculation, Not a Default

The regime question is the single biggest filing decision

For every salaried taxpayer in India, the first real call at filing time isn't which ITR form, it's which tax regime. From AY 2024-25 onwards, the new regime is the default — if you do nothing, you are taxed under its slabs. The old regime still exists and still has the deductions most middle-income earners are used to, but you must consciously opt for it. Picking by habit rather than calculation can quietly cost you tens of thousands of rupees, in either direction.

What changed in Budget 2025 for AY 2026-27

For the financial year 2025-26 (assessment year 2026-27), the new regime got materially better:

• Slabs are now: nil up to ₹4 lakh, 5% from ₹4–8 lakh, 10% from ₹8–12 lakh, 15% from ₹12–16 lakh, 20% from ₹16–20 lakh, 25% from ₹20–24 lakh, and 30% above ₹24 lakh.
• The Section 87A rebate is enhanced — under the new regime, the rebate covers tax payable on total income up to ₹12 lakh. In effect, a salaried taxpayer earning up to roughly ₹12.75 lakh (after the standard deduction) pays no income tax.
• The standard deduction under the new regime stands at ₹75,000 for salaried taxpayers.

These changes have shifted the break-even meaningfully toward the new regime for taxpayers who don't claim large deductions. But "the new regime always wins" is wrong — for taxpayers with significant HRA, home-loan interest and 80C savings, the old regime can still come out ahead.

What the old regime still offers

The old regime keeps its slab structure (nil up to ₹2.5 lakh, 5% to ₹5 lakh, 20% to ₹10 lakh, 30% above ₹10 lakh) and the full deduction toolkit: HRA exemption under Section 10(13A), 80C up to ₹1.5 lakh, 80D medical insurance, Section 24(b) home-loan interest up to ₹2 lakh, 80CCD(1B) NPS additional ₹50,000, and the smaller deductions like 80G donations and 80TTA/80TTB on interest. The standard deduction is ₹50,000 under the old regime.

The 87A rebate under the old regime caps at total income of ₹5 lakh — far lower than the new regime's ₹12 lakh window.

When the new regime wins

The new regime usually wins if:

• You rent a place but cannot or do not claim HRA correctly.
• You don't have a home loan, or the interest is small.
• Your 80C is partly forced (PF, term insurance, child tuition) rather than maxed deliberately.
• Your total income is comfortably under ₹12 lakh — the rebate makes you tax-neutral.
• You value simplicity and don't want to chase proofs.

For a salaried taxpayer in Pune earning ₹10 lakh with no home loan and a basic 80C of ₹1 lakh from EPF and term insurance, the new regime is the obvious choice — zero tax after standard deduction and 87A rebate, no documentation drama.

When the old regime still wins

The old regime can still win if:

• You pay substantial rent and claim full HRA legitimately (with landlord PAN where required).
• You have a self-occupied home loan with interest near ₹2 lakh.
• You max 80C (₹1.5 lakh), pay 80D for self and senior-citizen parents (up to ₹50,000 combined), and contribute to NPS for the additional 80CCD(1B) ₹50,000.
• You have professional or business expenses that interact with deductions.

For a Pune IT manager earning ₹22 lakh, paying ₹35,000 rent (full HRA claim), with a home-loan interest of ₹1.8 lakh on a property let out, full 80C and 80D, and NPS — running both regimes will often show the old one saving ₹40,000–₹70,000.

How we run the comparison

There is no shortcut: you compute tax under both regimes with your actual income and deductions, and pick the lower. We do this for every salaried client during the ITR filing process before settling the form. The exercise takes ten minutes, but it is the single highest-value step of the return — bigger than choosing the right form, bigger than reconciling the AIS for most salaried filers.

A few practical reminders:

• Salaried taxpayers can switch regimes each year, so this is a year-on-year call, not a lifetime commitment.
• Taxpayers with business or professional income face restrictions on switching back to the new regime once they have opted for the old. If you are on 44AD or 44ADA presumptive income, this is worth a careful read before changing.
• The choice is exercised at filing — there is no separate "opt-in" form needed for the new regime since it is the default. To opt for the old regime in a year your business has business income, you may need to file Form 10-IEA within the prescribed timeline; salaried filers usually just tick the option in the return.

The mechanics that surprise people

Three small points cost regime switchers real money each year:

• Rebate v deduction confusion. The new-regime 87A rebate of "tax on income up to ₹12 lakh" applies on total income — including capital gains, but with carve-outs (the ₹1.25 lakh equity LTCG exemption stands independently; gains above that are taxed at the relevant rate and don't qualify for the rebate). Ordinary salary up to the threshold is fully sheltered.
• HRA only under old. Choosing the new regime forfeits your HRA exemption. For a Pune renter paying ₹3 lakh annual rent, that's typically a ₹30,000–₹60,000 tax giveaway you can't get back.
• Home loan interest on self-occupied property is only deductible under the old regime. New regime allows the deduction only when the property is let out (and against rental income).

The bottom line

The right regime is the one your numbers say is right. For most clients we file, the answer is clear within a single computation — but it is the right computation, not a default. If you have rent, a home loan, or your investments push 80C and 80D toward their caps, the old regime is worth a serious look. If your income is salary-only with modest deductions, the new regime — especially with the new ₹12 lakh rebate — will usually be both lower and simpler.

For a side-by-side worked computation with your numbers, see the full ITR filing guide AY 2026-27.

File from Pune with the regime that genuinely saves you more

Pune salaried filers: we don't pick a regime by default. For every salaried client at RDA Tax Advisory Services, Baner, we run a side-by-side computation under both regimes — old and new — using your actual income, rent, home-loan interest, 80C, 80D and NPS contributions. We then file under the regime that produces the lower tax, with the right supporting proofs and the Form 10-IEA option where it applies. Pune renters in Baner, Hinjewadi, Kharadi and Wakad routinely save four to six figures under one regime over the other — but only if someone actually computes both. Bring us your Form 16 before you file: Office No. 102, Snehraj Apartment, Baner, Pune 411045, or call +91 77570 45059.

File AY 2026-27 with the right regime

Old or new — which one saves you more? Send your Form 16 to RDA on WhatsApp and we'll compute both, recommend the lower-tax option, and file before 31 July 2026. Book your filing slot at rdatax.in or call +91 77570 45059 — RDA Tax Advisory Services, Baner, Pune.