New vs Old Tax Regime for Investors (FY 2025-26): Why Your Capital Gains Tax Doesn't Change
Every filing season the internet fills with "old vs new regime" salary calculators. Almost all of them miss the one fact that matters most to an equity investor: your regime choice has zero effect on your capital-gains tax. STCG at 20%, LTCG at 12.5%, the ₹1.25 lakh exemption — they are identical whether you pick the new regime or the old one. The decision rides entirely on your other income. This is the investor's framework: what actually changes, the hidden basic-exemption lever, when the old regime still wins, and the Form 10-IEA trap for F&O traders.
Reading time: ~11 minutes. Want the bottom line by profile? Jump to the decision matrix.
The Big One: Capital Gains Are Regime-Neutral
Special-rate income — long-term and short-term gains on listed equity — is taxed the same in both regimes. The regime only governs your slab income (salary, interest, rent, business/F&O profit).
| New regime | Old regime | |
|---|---|---|
| STCG on equity (Sec 111A) | 20% | 20% |
| LTCG on equity (Sec 112A) | 12.5% over ₹1.25L | 12.5% over ₹1.25L |
| Health & education cess | 4% | 4% |
| Sec 87A rebate on this CG tax? | No | No |
That last row matters. Since the July-2024 utility change, the Section 87A rebate does not apply to the special-rate tax on Sec 111A (STCG) or Sec 112A (LTCG) in either regime. No regime makes your capital-gains tax disappear through the rebate. (For the rates themselves, see what Budget 2024 changed.)
The takeaway: when you choose a regime, ignore your capital gains entirely. They are a constant on both sides of the equation.
What the Regime Does Change: Slab Income
The regime decides how your salary, interest, rent and business income are taxed — through different slabs, a different standard deduction, a very different 87A rebate, and whether you can claim Chapter VI-A deductions at all.
| Slab (FY 2025-26) | New regime | Slab | Old regime (under 60) | |
|---|---|---|---|---|
| Up to ₹4,00,000 | Nil | Up to ₹2,50,000 | Nil | |
| ₹4,00,001 – ₹8,00,000 | 5% | ₹2,50,001 – ₹5,00,000 | 5% | |
| ₹8,00,001 – ₹12,00,000 | 10% | ₹5,00,001 – ₹10,00,000 | 20% | |
| ₹12,00,001 – ₹16,00,000 | 15% | Above ₹10,00,000 | 30% | |
| ₹16,00,001 – ₹20,00,000 | 20% | |||
| ₹20,00,001 – ₹24,00,000 | 25% | |||
| Above ₹24,00,000 | 30% |
| Feature | New regime | Old regime |
|---|---|---|
| Basic exemption | ₹4,00,000 | ₹2,50,000 (₹3L senior, ₹5L super-senior) |
| Standard deduction (salary) | ₹75,000 | ₹50,000 |
| Sec 87A rebate | Total income ≤ ₹12L → up to ₹60,000 | Total income ≤ ₹5L → up to ₹12,500 |
| 80C / 80D / HRA / home-loan interest | Not available | Available |
| Employer NPS (80CCD(2)) | Available | Available |
The new regime is the default (since FY 2023-24). You only end up in the old regime by actively choosing it.
The Investor's Hidden Lever: Basic-Exemption Absorption
Here is the part the salary calculators never model. For a resident, any portion of the basic exemption you don't use against ordinary income is absorbed against your special-rate gains — first STCG, then LTCG above ₹1.25 lakh. The new regime's basic exemption is ₹4 lakh versus the old regime's ₹2.5 lakh — so it hands an investor ₹1.5 lakh of extra tax-free room to soak up gains.
This is decisive for anyone living largely off their portfolio.
Worked Example A — a retiree living off capital gains. Only income for the year is ₹6,00,000 of LTCG. No salary.
| Step | New regime | Old regime |
|---|---|---|
| LTCG | ₹6,00,000 | ₹6,00,000 |
| Less Sec 112A exemption | −₹1,25,000 | −₹1,25,000 |
| Less basic exemption absorbed | −₹4,00,000 | −₹2,50,000 |
| Taxable LTCG | ₹75,000 | ₹2,25,000 |
| Tax @ 12.5% + 4% cess | ₹9,750 | ₹29,250 |
A ₹19,500 difference — driven entirely by the larger basic exemption, with no deduction stacking at all. Even a senior citizen's ₹3 lakh old-regime exemption still loses to the new regime's ₹4 lakh here. (The order of the ₹1.25L and basic-exemption subtractions doesn't change the taxable figure — only the size of the basic exemption does.) To use this allowance deliberately each year, see gain harvesting under the ₹1.25L exemption.
When the Old Regime Still Wins: The Deduction Break-Even
For someone with meaningful salary income, the question becomes: do your deductions save more than the new regime's lower rates plus its bigger rebate? With Budget 2025's slabs, the bar is now high.
Worked Example B — a salaried investor. Salary ₹18,00,000 plus ₹2,00,000 LTCG. The capital-gains tax is identical either way — ₹75,000 taxable × 12.5% + cess = ₹9,750 — so it drops out of the decision. Everything turns on the salary.
| New regime | Old regime (₹3.75L deductions) | |
|---|---|---|
| Salary | ₹18,00,000 | ₹18,00,000 |
| Less standard deduction | −₹75,000 | −₹50,000 |
| Less Chapter VI-A (80C ₹1.5L + 24(b) ₹2L + 80D ₹0.25L) | — | −₹3,75,000 |
| Taxable slab income | ₹17,25,000 | ₹13,75,000 |
| Slab tax (before cess) | ₹1,45,000 | ₹2,25,000 |
Even with a healthy ₹3.75 lakh deduction stack, the new regime wins by ₹80,000. Running the break-even at this income, the old regime only pulls ahead once total deductions exceed roughly ₹6.4 lakh — which in practice needs HRA and a home loan (₹2L interest) and full 80C and NPS and 80D all stacked together.
This break-even is illustrative, not a fixed line. It shifts with your income level and the exact deductions you can genuinely claim. Compute both regimes on your real numbers before deciding.
F&O Traders and Business Income: The Form 10-IEA Trap
How you exercise the choice depends on whether you have business or professional income.
- Salaried or capital-gains-only filers (ITR-2): you pick your regime directly in the ITR each year, with full annual freedom to switch.
- Business or professional income, including F&O traders (ITR-3): to opt out of the default new regime and into the old one, you must file Form 10-IEA on or before the Section 139(1) due date. And the switch is a one-way door — a taxpayer with business income who moves to the old regime can return to the new regime only once, and after that can never go back to old.
So an F&O trader weighing the old regime for a one-off high-deduction year should think twice: the switch-back is a once-in-a-lifetime token. For the filing mechanics, see the F&O ITR-3 guide.
The Decision Matrix
| Investor profile | Usually wins | Why |
|---|---|---|
| Retiree / low salary, living off capital gains | New | The ₹4L basic exemption absorbs more of your gains (Example A) |
| Salaried, few deductions (renter, no home loan) | New | Lower slab rates + the ₹12L 87A rebate |
| Income ≤ ₹12L, mostly slab income | New | 87A wipes out slab tax to ₹12L; old caps the rebate at ₹5L |
| Salaried with HRA + home loan + full 80C/NPS/80D | Run both | Only past ~₹6.4L of real deductions does old overtake new |
| F&O / business income, modest deductions | New (default) | Avoids Form 10-IEA and the once-only switch-back trap |
Quick checklist:
- Your capital-gains tax is the same in both regimes — leave it out of the comparison.
- Add up the deductions you will actually claim (not the theoretical maximum).
- Small deductions or renting? The new regime almost certainly wins.
- Home loan + HRA + full 80C? Compute both on your real figures.
- Business/F&O income? Factor in Form 10-IEA and the once-only switch-back before opting out of new.
See your capital-gains tax with zero guesswork
VriddhiQ computes your equity capital-gains tax — the part that's identical in both regimes — and your full new-regime liability, including how your basic exemption absorbs gains. So whichever regime you land on, the investment side is already nailed.
Try VriddhiQ freeFrequently Asked Questions
Does the tax regime change my LTCG or STCG rate?
No. Listed-equity STCG (20%) and LTCG (12.5% over ₹1.25 lakh), plus the 4% cess, are identical in both regimes. The regime only affects tax on slab income such as salary, interest and business profit.
Can I switch between regimes every year?
If you have only salary and/or capital gains (ITR-2), yes — you choose each year directly in your return. If you have business or professional income (ITR-3, including F&O), you must file Form 10-IEA to opt for the old regime, and once you switch back to the new regime you cannot return to the old one.
Is the new regime always better for investors?
Not always. For investors living off capital gains, and for most salaried people with modest deductions, the new regime wins. But a large, genuine deduction stack — HRA plus home-loan interest plus full 80C — can still tip the balance to the old regime. Compute both on your actual numbers.
Does the ₹1.25 lakh LTCG exemption exist in both regimes?
Yes. The annual ₹1.25 lakh Section 112A exemption on long-term equity gains is identical in the new and old regimes.
Which regime should a retiree living off capital gains choose?
Usually the new regime. Its ₹4 lakh basic exemption absorbs more of your gains than the old regime's ₹2.5 lakh (or ₹3 lakh for seniors), often saving tens of thousands in tax with no deductions involved at all.
Further reading
- What Budget 2024 changed for capital gains — the rates that stay constant across both regimes
- The ₹1.25 lakh LTCG exemption — harvesting the allowance the basic exemption stacks on top of
- Filing F&O in ITR-3 — where Form 10-IEA and business income come in
This article reflects FY 2025-26 (AY 2026-27) rules. Regime choice depends on your exact income and deductions — run both computations, and consult a CA before opting out of the default new regime if you have business income.