Old vs New Tax Regime FY 2026-27: Which One Should You Choose?

Since the new tax regime became the default option, the question most salaried taxpayers face every year isn't "which regime exists" but "which one actually saves me money" — and the honest answer is: it depends entirely on how many deductions you're able to claim under the old regime.

The Core Trade-Off

The new regime offers lower slab rates but disallows most deductions and exemptions. The old regime has higher slab rates but allows a long list of deductions (80C, 80D, HRA, home loan interest, and more). Neither regime is universally better — it's a genuine calculation, not a default choice.

Slab Rate Comparison

Income Slab	New Regime Rate	Old Regime Rate
Up to ₹3 lakh	Nil	Nil
₹3–6 lakh	5%	5% (₹2.5–5 lakh slab)
₹6–9 lakh	10%	20% (₹5–10 lakh slab)
₹9–12 lakh	15%	20%
₹12–15 lakh	20%	30%
Above ₹15 lakh	30%	30%

(Rates indicative for illustration; always check the specific slab notified for the relevant assessment year, as new-regime slabs have been revised in recent budgets more frequently than old-regime slabs.)

What You Lose Under the New Regime

The new regime disallows most of the deductions that make the old regime attractive to disciplined savers:

• Section 80C (up to ₹1.5 lakh — PPF, ELSS, life insurance, home loan principal, etc.) — not available
• HRA exemption — not available, even if you pay rent
• Home loan interest (Section 24(b), up to ₹2 lakh for self-occupied property) — not available under new regime for self-occupied property
• Section 80D (health insurance premium) — not available
• Standard deduction — available under both regimes (₹75,000 under new regime, ₹50,000 under old, as revised in recent budgets) — one of the few overlaps

When the Old Regime Usually Wins

The old regime tends to come out ahead when you can claim a substantial combination of:

• Full ₹1.5 lakh under Section 80C, plus
• Meaningful HRA exemption (especially in a metro city, paying real rent), plus
• Home loan interest on a self-occupied property, plus
• Health insurance premium under 80D

As a rough rule of thumb, if your total genuine deductions cross roughly ₹3.5–4 lakh (varies by income level and exact slab structure in force), the old regime is often better; below that, the new regime's lower rates usually win even without any deductions to claim.

When the New Regime Usually Wins

• You don't pay rent (living in your own house, or with family) and get no HRA benefit
• You haven't taken a home loan, or your property is let out (different interest deduction rules apply)
• You don't invest close to the full ₹1.5 lakh 80C limit
• You prefer simplicity — no need to collect and preserve investment proofs, rent receipts, and loan interest certificates

How to Actually Decide — A Simple Method

1. List every deduction you can genuinely claim under the old regime this year — not what you could theoretically invest in, but what you've actually put in or paid
2. Compute tax payable under the old regime slab rates after those deductions
3. Compute tax payable under the new regime slab rates with no deductions (except standard deduction)
4. Pick whichever number is lower — and re-run this calculation every year, since your deduction pattern (home loan paid off, rent situation changed) can shift the answer over time

Salaried employees can choose the regime afresh each year when filing their return (or intimate their employer at the start of the year for TDS purposes, and still switch at filing time). Those with business/professional income have a more restricted ability to switch back to the old regime once they've opted for the new one in certain circumstances — this is worth checking specifically if you have non-salary income.

If you're unsure which regime applies better to your specific numbers this year, our ITR filing service includes a regime comparison as part of the filing process, so you're not guessing.