Old vs New Tax Regime Which One Should You Pick in FY 2025-26
Every July, the same argument breaks out in every office WhatsApp group. Someone claims the old regime always wins if you have HRA. Someone else swears the new regime is better for everyone now. Both are repeating advice from two years ago without checking if it still applies to their own salary. The honest answer to old vs new tax regime isn't a rule of thumb, it's whatever your actual numbers say, and those numbers are different for every income level.
Budget 2025 didn't touch the new regime's slabs from the year before. What it did was double down on making the new regime the default. If you've never actively filled a form to opt into the old regime, you're already in the new one, whether you meant to be or not.
How the new regime actually taxes you
The new regime has no real deductions to speak of, beyond the standard deduction of ₹50,000 for salaried employees. What it gives you instead is wider slabs and a rebate that wipes out tax entirely up to ₹7 lakh in taxable income. Here's the slab structure for FY 2025-26.
| Taxable Income | Rate |
|---|---|
| Up to ₹3,00,000 | Nil |
| ₹3,00,001 to ₹7,00,000 | 5% |
| ₹7,00,001 to ₹10,00,000 | 10% |
| ₹10,00,001 to ₹12,00,000 | 15% |
| ₹12,00,001 to ₹15,00,000 | 20% |
| Above ₹15,00,000 | 30% |
A 4% health and education cess sits on top of whatever tax these slabs produce. And if your taxable income is ₹7 lakh or under, Section 87A cancels the tax out completely. That last part is why so many people under ₹7 lakh assumed the new regime is automatically better for everyone, including people earning three times that.
Where the old regime still has teeth
The old regime's slabs look worse on paper. Nil only up to ₹2.5 lakh, then 5%, then a jump straight to 20% between ₹5 lakh and ₹10 lakh, then 30% above that. What makes it competitive is everything you're allowed to subtract before you even get to those slabs: Section 80C up to ₹1.5 lakh (PPF, ELSS, life insurance premiums), Section 80D for health insurance, HRA if you're renting, and Section 24B for home loan interest up to ₹2 lakh if you have one.
I've seen people assume that having HRA automatically means the old regime wins. It doesn't automatically mean anything. It depends on how big your HRA claim actually is relative to your income, and whether you're stacking it with 80C and 80D too.
Running the actual numbers
Take someone earning ₹18,00,000 a year, renting in a metro city, contributing to PPF and an ELSS fund, and paying for health insurance. No home loan yet.
Under the new regime, only the ₹50,000 standard deduction applies. Taxable income comes to ₹17,50,000. Running that through the slabs gives ₹2,15,000 in tax, plus 4% cess, for a total of ₹2,23,600.
Under the old regime, the same person claims the ₹50,000 standard deduction, ₹1,50,000 under 80C, ₹25,000 under 80D, and an HRA exemption of ₹1,80,000. That's ₹4,05,000 in total deductions, right around the figure most advisors quote as the old-vs-new-tax-regime breakeven point. Taxable income drops to ₹13,95,000. Tax on that comes to ₹2,31,000, plus cess, for a total of ₹2,40,240.
The new regime wins here by ₹16,640, even after this person claimed HRA, 80C, and 80D all at once. That surprised me the first time I ran it too. The popular advice says hitting the ₹4-4.5 lakh deduction mark should tip things toward the old regime. At this particular income level, it doesn't, because the new regime's wider 20% slab (₹12-15 lakh) versus the old regime's earlier jump to 30% (above ₹10 lakh) does more work than the deductions can make up for.
| Regime | Taxable Income | Tax + Cess |
|---|---|---|
| New Regime | ₹17,50,000 | ₹2,23,600 |
| Old Regime | ₹13,95,000 | ₹2,40,240 |
This is exactly why I'd never tell someone to just pick a regime based on what worked for a friend on a different salary. Plug your own numbers into our income tax calculator and compare both regimes side by side before you decide, especially if your deductions are anywhere near that breakeven zone.
The deductions only matter if you're already using them
Here's the part that trips people up. If you're not actually maxing out 80C, don't have significant HRA, and don't have a home loan, the old regime's deductions are theoretical, you're not claiming most of them anyway. In that case the new regime almost always wins, since you get the wider slabs for free without needing to have invested or paid rent to earn them.
If you do have a home loan with meaningful interest under Section 24B on top of 80C and HRA, the math tips back toward the old regime pretty quickly, since that's often another ₹1.5-2 lakh in deductions stacked on top of what we calculated above. Someone with a home loan and the same salary in the example above would likely come out ahead in the old regime instead.
And if you're already contributing to PPF for the 80C benefit under the old regime, it's worth checking what that same contribution grows into over time using our PPF calculator, since the tax saved today is only half the picture.
The one deduction the new regime still lets you claim
Most people assume the new regime strips out every deduction, full stop. It doesn't, quite. Section 80CCD(2) lets you deduct your employer's contribution to your NPS account, up to 14% of basic salary for central government employees and 10% for everyone else, and this applies under both regimes. It's easy to miss because it's not something you actively invest, it only counts if your employer already runs an NPS contribution as part of your CTC structure.
For someone earning ₹18,00,000 with 40% basic salary, a 10% employer NPS contribution works out to roughly ₹72,000 knocked off taxable income even while sitting in the new regime. Run that through the ₹18 lakh example above and the new regime's lead over the old regime widens further, since none of the old regime's other deductions can be layered on top of this one without switching regimes entirely. If your employer offers this and you haven't opted in, it's worth asking your HR team about it regardless of which regime you end up filing under.
FAQ
Can I switch between old and new tax regime every year? Salaried individuals can switch every financial year when filing returns. If you have business income, switching is more restricted, generally allowed once, with conditions on switching back.
Is the new tax regime always better if I earn under ₹7 lakh? For most people at that income, yes, since the Section 87A rebate cancels the tax entirely under the new regime. But if you have a large home loan or HRA claim even at that income level, it's worth checking both, since the math isn't always automatic.
Does the new tax regime allow any deductions at all? Very few. The standard deduction of ₹50,000 for salaried individuals applies, along with employer NPS contributions under Section 80CCD(2). Most other Chapter VI-A deductions like 80C, 80D, and HRA don't apply.
What's the actual breakeven point between the two regimes? There's no single number, it shifts with your income level and which slabs you're crossing. Somewhere around ₹4-4.5 lakh in total deductions is the commonly cited rule of thumb, but as the ₹18 lakh example above shows, it can go either way even near that mark.
This is educational information for FY 2025-26 based on standard slab structures, not tax advice, confirm your specific situation with a chartered accountant before filing. You can also check current rules directly on the Income Tax Department's e-filing portal.