The headline rule: roughly Rs 4 lakh of deductions is the cut-over
The single most-asked Indian income-tax question every March is: which regime saves more tax for me, the old or the new? After the Budget 2025 changes, the answer simplifies to a single rule for most salaried taxpayers.
Below roughly Rs 4 lakh to Rs 4.5 lakh in total old-regime deductions, the new regime wins. Above that level, the old regime starts to win, and the gap grows for incomes above Rs 15 lakh. Below Rs 12.75 lakh of gross salary, the new regime almost always wins regardless of deductions because the Section 87A rebate makes tax zero.
What counts as "old-regime deductions"? Add up:
- HRA exemption under Section 10(13A), if you live on rent
- Section 80C investments: PPF, ELSS, EPF, life insurance premium, ULIP, home loan principal, NSC, tax-saver FD, Sukanya Samriddhi, capped at Rs 1,50,000
- Section 80D health insurance premium: Rs 25,000 self + family, plus Rs 50,000 for senior-citizen parents
- Section 24(b) home loan interest: up to Rs 2,00,000 for self-occupied property
- Section 80CCD(1B) additional NPS Tier 1: up to Rs 50,000 over and above 80C
- Section 80E education loan interest, Section 80G donations, Section 80TTA / 80TTB savings interest, usually smaller items
The standard deduction sits outside this calculation: Rs 50,000 in the old regime, Rs 75,000 in the new regime. The new regime's higher standard deduction (Rs 25,000 extra) is one of the reasons it wins for low-deduction filers even before the 87A rebate kicks in.
This article walks through ten realistic income and deduction combinations and shows which regime wins each time, with full worked math.
Ten realistic income / deduction combinations
To make the abstract decision rule concrete, here are ten scenarios spanning the typical Indian salaried taxpayer. The table shows gross salary, total old-regime deductions claimed, final tax under each regime (with 4% cess applied), and the winner. All numbers assume FY 2025-26 slabs.
| Scenario | Gross salary | Total deductions | Old regime tax | New regime tax | Winner | Savings |
|---|---|---|---|---|---|---|
| Fresher, no rent, no investments | Rs 7,00,000 | Rs 50,000 (std) | Rs 28,600 | Rs 0 | New | Rs 28,600 |
| Junior engineer, rent + small 80C | Rs 10,00,000 | Rs 2,50,000 | Rs 31,200 | Rs 0 | New | Rs 31,200 |
| Single, metro rent, 80C maxed | Rs 12,75,000 | Rs 4,00,000 | Rs 33,800 | Rs 0 | New | Rs 33,800 |
| Mid-career, rent + 80C + 80D | Rs 15,00,000 | Rs 5,00,000 | Rs 65,000 | Rs 97,500 | Old | Rs 32,500 |
| Mid-career, home loan + 80C only | Rs 18,00,000 | Rs 4,00,000 | Rs 1,32,000 | Rs 1,49,500 | Old | Rs 17,500 |
| Senior engineer, full stack of deductions | Rs 20,00,000 | Rs 5,50,000 | Rs 1,57,300 | Rs 2,01,500 | Old | Rs 44,200 |
| VP / Director, low rent, 80C only | Rs 25,00,000 | Rs 2,00,000 | Rs 3,46,840 | Rs 2,87,000 | New | Rs 59,840 |
| VP / Director, full deductions | Rs 30,00,000 | Rs 5,50,000 | Rs 4,33,420 | Rs 4,99,500 | Old | Rs 66,080 |
| Senior manager, rent + 80C + NPS | Rs 40,00,000 | Rs 4,50,000 | Rs 7,80,520 | Rs 8,30,500 | Old | Rs 49,980 |
| Owner, no rent, no investments | Rs 60,00,000 | Rs 50,000 (std) | Rs 16,40,820 | Rs 14,93,400 | New | Rs 1,47,420 |
Key takeaways from the ten scenarios:
- Below Rs 12.75 lakh the new regime wins universally because of Section 87A. Old-regime tax of Rs 28K to Rs 34K vanishes to zero under the new regime.
- Rs 15 lakh to Rs 30 lakh with full deductions: the old regime wins by Rs 17K to Rs 66K. The break-even is around Rs 4 lakh of total deductions.
- Above Rs 40-50 lakh without deductions: the new regime wins because the 25% surcharge cap and lower marginal rate (30% above Rs 24L vs 30% above Rs 10L) bite.
- The largest single deduction is usually HRA in metros: a Rs 3 lakh HRA exemption alone can shift the decision by Rs 60K-Rs 90K of annual tax.
Cut-over deductions by income: where the old regime overtakes
The Rs 4 lakh rule is a simplification. The actual cut-over varies with gross income because the two regimes have very different slab structures. Below is the precise deductions threshold at which the old regime starts winning at each income level.
| Gross salary | Cut-over deductions | Marginal slab in old regime | Marginal slab in new regime | Why the cut-over moves |
|---|---|---|---|---|
| Rs 7 lakh | Never (new always wins) | 5% | 0% (rebate) | Section 87A makes new tax zero up to Rs 12.75L gross. |
| Rs 10 lakh | Never (new always wins) | 20% | 0% (rebate) | 87A still produces zero tax in the new regime. |
| Rs 12.75 lakh | Never (new always wins) | 20% | 0% (rebate) | Exactly the upper edge of 87A's reach. |
| Rs 15 lakh | Roughly Rs 3,75,000 | 20% | 15% | Old slab 20% beats new slab 15% only when deductions are large. |
| Rs 20 lakh | Roughly Rs 4,25,000 | 30% | 20% | Old hits 30% earlier (above Rs 10L vs Rs 24L in new). |
| Rs 25 lakh | Roughly Rs 4,33,000 | 30% | 25% | New peaks at 25% slab from Rs 20-24L. |
| Rs 30 lakh | Roughly Rs 4,50,000 | 30% | 30% | Both at 30%; deductions matter more than slab differences. |
| Rs 40 lakh | Roughly Rs 4,75,000 | 30% | 30% | Same marginal rate; deduction-driven. |
| Rs 50 lakh+ | Roughly Rs 5,00,000+ (surcharge) | 30% + 10% surcharge | 30% + 10% surcharge | Surcharge applies; new regime caps surcharge at 25% vs 37% old. |
The key intuition: below Rs 12.75 lakh, the Section 87A rebate is so powerful that no level of deductions can overcome it. Above Rs 12.75 lakh, the cut-over deductions amount slowly rises from Rs 3.75 lakh at Rs 15L to about Rs 5 lakh at Rs 50L+. For most salaried taxpayers with HRA in metros, full 80C, full 80D and a home loan, hitting Rs 4-4.5 lakh is realistic and the old regime is the right answer.
HRA is the biggest swing factor in the decision
The single biggest swing item in the old vs new decision is your HRA exemption. HRA is the only large deduction that can vary from zero to Rs 5 lakh+ per year for the same gross salary, depending entirely on whether you live on rent in a metro.
Quick HRA refresher. The HRA exemption equals the minimum of:
- Actual HRA component in your payslip
- 50% of basic salary (metro) or 40% of basic (non-metro)
- Rent paid minus 10% of basic salary
For a person earning Rs 15 lakh gross with basic = Rs 6 lakh (40% of gross), living in Mumbai paying Rs 35,000 rent monthly:
- Actual HRA (assume 50% of basic): Rs 3,00,000
- 50% of basic (metro): Rs 3,00,000
- Rent minus 10% basic: Rs 4,20,000 minus Rs 60,000 = Rs 3,60,000
- HRA exemption: minimum of the three = Rs 3,00,000
That Rs 3 lakh deduction alone, at a 20% marginal slab, saves Rs 60,000 of old-regime tax plus Rs 2,400 of cess. For higher earners in the 30% slab, the same Rs 3 lakh HRA saves Rs 90,000+ in tax. This is why metro renters with full HRA almost always benefit from the old regime, while people in their own home or paying rent in tier-3 cities often find the new regime wins.
For a full walkthrough of HRA computation, see our HRA exemption 2026 guide and the related 80C tax saving 2026 guide.
How to actually decide and file
The decision boils down to four steps. Run them every March before filing.
- List your real deductions for the year: HRA receipts (you need rent receipts every month plus PAN of landlord if rent exceeds Rs 1 lakh/year), 80C investments actually made (PPF, ELSS, EPF), 80D health premium paid, home loan interest certificate, NPS Tier 1 statement, professional tax, donations under 80G with valid 80G receipt.
- Run both regime taxes using the quiz above. Include the Rs 50K standard deduction in old and Rs 75K in new. Apply the Section 87A rebate (Rs 5L threshold old, Rs 12L threshold new). Apply 4% cess.
- Inform your employer in April via Form 12BB which regime you want for TDS. The default since FY 2023-24 is the new regime; opt for old if you want it. You can still switch back at ITR filing time if you change your mind.
- File ITR with the correct regime selected. ITR-1 (simple salary) and ITR-2 (salary + capital gains) allow regime selection in the form. ITR-3 / ITR-4 (business / professional) requires Form 10-IEA filed before the due date to opt out of the new regime. Check our ITR filing 2026 step-by-step guide for the exact process.
A common worry: "what if I tell my employer one regime and want to switch at ITR filing?" For salaried taxpayers without business income this is allowed. Your employer's TDS calculation does not bind your ITR-time choice. You can have higher TDS deducted under one regime and claim a refund by switching to the other at filing time, or vice versa pay extra self-assessment tax. The actual final tax is governed by ITR, not TDS.
Run the math for your situation
Use our 🇮🇳 Old vs New Regime Quiz to plug in your own salary, rent, home loan and investments and see which regime wins for you in FY 2025-26.