Priya earns 15 lakh a year in Hyderabad. Her colleague Arjun earns the same. Same company, same city, same age. But Arjun pays almost 1.75 lakh less in tax than Priya this year.
The difference comes down to one line on their HR form: which tax regime they picked.
If you earn 10 lakh or more, this single choice can be worth more than a raise. Here is how to make it.
Why this choice matters more now
For years, most salaried Indians defaulted into the old tax regime. It let you subtract things like your PPF, life insurance, and home loan interest before calculating tax.
Then the rules shifted. Since FY 2023-24, the new tax regime has been the default — and Budget 2024 made it much more attractive from FY 2025-26 with a higher standard deduction and a bigger rebate. That means unless you actively choose otherwise, your employer calculates your tax under the new rules.
You can still pick the old regime, but you have to opt for it. And for most salaried people, the new regime wins. Here is why:
- Lower tax slabs — you pay a smaller percentage on most of your income.
- A bigger standard deduction — 75,000 off the top, no paperwork needed.
- A rebate that makes up to 12 lakh of taxable income effectively tax-free.
We will walk through each of these with real numbers, then give you a calculator you can build in Excel tonight.
A quick note on the law: The Income Tax Act 2025 came into force on 1 April 2026. It mostly renumbers old sections — it does not change the core math for most people. This article uses the new section numbers and shows the old number next to them so your Form 16 still makes sense. If you are filing for income earned before 1 April 2026, the section numbers on your form will be the old ones (80C, 16(ia), 87A) — but the slabs and the 75,000 standard deduction are the same.
Three sections you need to know (no legal degree required)
Section 19 — your “free” salary discount (was Section 16(ia))
This is the standard deduction. If you are a salaried employee, the law lets you knock 75,000 straight off your salary income before tax under the new regime. No bills. No proofs. It just happens. Under the old regime, this discount is smaller: 50,000.
Section 123 — the old “save tax by investing” bucket (was Section 80C)
This is the famous 1.5 lakh deduction. PPF, ELSS mutual funds, life insurance, your home loan principal — all of it sat under old Section 80C. Under the new Act it is called Section 123. The limit is still 1.5 lakh a year.
Here is the catch: Section 123 only works if you choose the old regime. In the new regime, this bucket is closed.
Section 87A — the “do not pay tax if you earn less” rebate (now Section 156)
A rebate is not a deduction. A deduction shrinks your income. A rebate shrinks your final tax bill. Under the new regime, if your taxable income is 12 lakh or less, the government hands you back up to 60,000 — enough to cancel your entire tax. Under the old regime the rebate is tiny: up to 12,500, and only if taxable income is 5 lakh or less.
That rebate is the secret behind the “zero tax” headline you may have seen.
Why the new regime wins for most salaried people
- First 4 lakh: no tax at all.
- Next slabs rise gently: 5%, 10%, 15%, then up.
- 75,000 standard deduction (Section 19) comes off the top.
- If you land at 12 lakh taxable income or below, the Section 87A rebate wipes your tax to zero.
Because of that 75,000 deduction, a salaried person with gross salary up to about 12.75 lakh can pay zero income tax under the new regime. Zero. Not “less.” Zero.
Example 1: Amit, 32, software engineer, 15 lakh gross
- Gross salary: 15,00,000
- Basic + DA: 7,00,000
- Employer puts 14% into NPS on his behalf: 98,000
New regime:
- Take off 75,000 (standard deduction) and 98,000 (employer NPS): taxable income = 13,27,000
- Tax on that: 79,050
- Add 4% health cess: 3,162
- Total new-regime tax: 82,212
Old regime (Amit keeps it simple, claims only the 50,000 standard deduction):
- Taxable income: 14,50,000
- Tax on that under old slabs: 2,47,500
- Add 4% cess: 9,900
- Total old-regime tax: 2,57,400
Amit saves 1,75,188 just by staying in the new regime. That is more than two months of take-home.
Mind the gap: That 1.75 lakh assumes Amit claims no old-regime deductions — just the standard deduction. If he invested 1.5 lakh in PPF or ELSS under Section 123, his old-regime tax would drop to about 2,10,600, narrowing the gap to about 1.28 lakh. With a home loan and health insurance on top, the gap shrinks further. The new regime still wins in almost all cases at 15 lakh gross, but the margin depends on your actual deductions.
Example 2: When does the old regime fight back?
The old regime only wins when your deductions are huge. Think: a big home loan (interest can run 2-3 lakh a year), high metro rent claimed as HRA (2-3 lakh), maxed-out PPF/ELSS (1.5 lakh), and health insurance for parents (50,000).
Even then, at 15 lakh gross, the new regime usually still edges it. The old regime starts to genuinely win only for higher earners with very large, real deductions — typically 20 lakh+ gross with 7-8 lakh of genuine claimed deductions.
If your deductions are “normal” (some 80C, maybe a small health policy, no big home loan), the new regime wins. Comfortably.
The one move most people miss: employer NPS at 14%
Your employer can contribute to your NPS (National Pension System) on your behalf, and that contribution is deductible — even under the new regime. Budget 2024 raised the limit for private-sector employees from 10% to 14% of your basic salary + DA, matching government employees.
Say your basic + DA is 10 lakh. Your employer can route 1.4 lakh into NPS and knock that straight off your taxable income. At the 30% slab, that saves you about 42,000 in tax.
Two things to know before you ask HR:
- That money is locked until age 60 (with at least 40% used to buy an annuity). It builds retirement wealth, but you cannot touch it early.
- Ask your HR or payroll to label it clearly as employer NPS contribution. Your own NPS contribution (the 50,000 extra) is not allowed in the new regime.
This is the rare legal move left to lower your tax without leaving the new regime. Most employees do not even know it exists.
Your Excel calculator (5 steps, your numbers)
You do not need to trust any website. Build this in Excel or Google Sheets and plug in your own numbers.
Step 1 — Enter your inputs (the yellow cells)
- Gross salary
- Basic + DA
- Employer NPS % (enter 14 for new regime; 10 private / 14 govt for old)
- Old-regime deductions only: 80C/Section 123 claimed, 80D health, HRA claimed, home loan interest
Step 2 — New regime math
Employer_NPS = Basic_DA * (Employer_NPS_% / 100)
Taxable_New = Gross - 75000 - Employer_NPS
Tax_Before_Rebate_New = apply new slabs to Taxable_New
Rebate_New = IF(Taxable_New <= 1200000, MIN(Tax_Before_Rebate_New, 60000), 0)
Tax_New = (Tax_Before_Rebate_New - Rebate_New) * 1.04Step 3 — Old regime math
Std_Ded_Old = 50000
Taxable_Old = Gross - Std_Ded_Old - Sec123 - 80D - HRA - HomeLoanInterest
Tax_Before_Rebate_Old = apply old slabs to Taxable_Old
Rebate_Old = IF(Taxable_Old <= 500000, MIN(Tax_Before_Rebate_Old, 12500), 0)
Tax_Old = (Tax_Before_Rebate_Old - Rebate_Old) * 1.04Step 4 — The slab tables (paste these as lookup ranges)
New regime rates:
- 0 to 4,00,000 → 0%
- 4,00,001 to 8,00,000 → 5%
- 8,00,001 to 12,00,000 → 10%
- 12,00,001 to 16,00,000 → 15%
- 16,00,001 to 20,00,000 → 20%
- 20,00,001 to 24,00,000 → 25%
- Above 24,00,000 → 30%
Old regime rates:
- 0 to 2,50,000 → 0%
- 2,50,001 to 5,00,000 → 5%
- 5,00,001 to 10,00,000 → 20%
- Above 10,00,000 → 30%
Step 5 — The answer
Pick the regime with the LOWER Tax_New vs Tax_Old.Quick check on our Amit example above: New = 82,212, Old = 2,57,400 → New wins by 1,75,188. Matches.
If your income crosses 50 lakh, a “surcharge” is added on top (10% up to 1 crore, rising further). The calculator above covers the normal salaried range; very high earners should add the surcharge step or ask a CA.
Marginal relief — no cliff at 12 lakh
One thing worth knowing: if your taxable income is just above 12 lakh, you will not suddenly owe a massive tax bill. Marginal relief kicks in and caps your tax at roughly the excess over 12 lakh. So if your taxable income is 12.5 lakh, you pay about 50,000 in tax, not the full slab amount. The transition is gradual, not a cliff. This applies up to roughly 12.7 lakh taxable income.
Risks to keep in mind
- The new regime is the default. If you do nothing, you are in it. That works for most people — but if you have massive old-regime deductions, “doing nothing” could cost you. Check before 31 July (the usual ITR due date).
- Tax law changes. Slabs and limits can move in future budgets. Re-run your calculator each year.
- NPS is long-term money. The 14% employer NPS trick saves tax now but locks the corpus till 60. Good for retirement, not for short-term cash.
- This is education, not advice. Your case may have pieces a calculator misses — capital gains, rental income, a side business. When in doubt, pay a chartered accountant 1,500 for a 20-minute review. It pays for itself.
- Always verify with the source. The authoritative numbers are on the Income Tax Department site (incometax.gov.in), including their official “New Tax vs Old Tax Regime” FAQ and the Income Tax Act 2025. Cross-check anything you read — including this article — against those.
What to do today
- Open your Form 16 (or ask HR) and note your gross salary, basic + DA, and any employer NPS.
- Build the 5-step calculator above in a spreadsheet — or just use the Income Tax Department’s free “Income and Tax Calculator” on incometax.gov.in.
- Run both regimes with your real deduction numbers.
- If you have business income, remember: opting for the old regime needs Form 10-IEA filed on time. Salaried-only filers just tick “opt out of new regime” in the ITR.
- Pick the lower number. Tell your employer before the financial year starts so TDS is right.
The bottom line
For most salaried Indians earning 10 lakh and above, the new regime wins — lower slabs, a 75,000 standard deduction, and a rebate that can make up to 12 lakh of taxable income tax-free. The old regime is only worth the paperwork if you have genuinely large, real deductions (big home loan, high rent, maxed investments). And the one smart move that survives in the new regime is asking your employer to route up to 14% of your basic salary into NPS.
Spend 10 minutes running your own salary through both regimes using the calculator above. You will know your number — and for most of you, it will confirm the new regime is the cheaper seat.
Sources: Income Tax Department — “New Tax vs Old Tax Regime” FAQs (incometax.gov.in); Income Tax Act 2025 (effective 1 April 2026); Union Budget 2024 (14% employer NPS limit). Numbers cross-checked against the Department’s published slab rates. This article is for education only and is not tax or investment advice.
FAQ — Quick Answers
Q: What is the difference between new and old tax regime for 2026-27?
A: The new tax regime (default since FY 2023-24) offers lower slab rates, a 75,000 standard deduction, and a 60,000 rebate making up to 12 lakh taxable income tax-free. The old regime lets you claim deductions like Section 123 (old 80C, 1.5L), HRA, home loan interest, and 80D — but has higher slabs and only 50,000 standard deduction.
Q: Is Section 123 the same as Section 80C?
A: Yes. The Income Tax Act 2025 renumbered Section 80C to Section 123. The limit remains 1.5 lakh per year. Section 123 only applies if you opt for the old tax regime.
Q: How much salary is tax-free under the new regime?
A: A salaried employee with gross salary up to 12.75 lakh pays zero tax (12.75L gross – 75,000 standard deduction = 12L taxable income; the 60,000 rebate cancels the liability).
Q: Can I claim employer NPS deduction in the new tax regime?
A: Yes. Budget 2024 raised the employer NPS deduction limit to 14% of Basic + DA, available even in the new regime under Section 80CCD(2).
Q: How do I switch from new to old tax regime?
A: Salaried-only filers tick “opt out of new regime” in the ITR form. Business income filers file Form 10-IEA before the due date.
Disclaimer: This article is for education only and is not tax or investment advice. Always consult a qualified chartered accountant for your specific situation.
