New Regime vs Old Regime: Tax Year 2026-27 Decision Guide Under the Income-tax Act, 2025

Last Updated: 15 April 2026  |  Applicable From: Tax Year 2026-27 (1 April 2026 onwards)  |  Reference: Income-tax Act, 2025 (30 of 2025), as amended by Finance Act, 2026

The choice between the new regime and the old regime is the single most consequential tax planning decision for most Indian individual taxpayers. Under the Income-tax Act, 2025, which received Presidential assent on 21 August 2025 and commenced unconditionally on 1 April 2026, the new regime is the default. If a taxpayer does nothing, their income for tax year 2026-27 and onwards is computed under the new regime slabs with the limited set of deductions allowed under the new regime. The old regime continues to be available, but only on an opt-out basis and, for taxpayers with business or profession income, only through the Form 10-IEA equivalent mechanism with one-time re-switching restrictions. This guide walks through the slabs, the deductions, the Form 10-IEA mechanics, the break-even maths at income levels from ₹7 lakh to ₹1 crore, and the practical decision framework for common taxpayer profiles — salaried individuals, business and profession income earners, senior citizens, HUFs, home-loan borrowers and NPS contributors.

Table of Contents

1. The New and Old Regime Under the Income-tax Act, 2025
2. Slabs, Rebate and Standard Deduction
3. Deductions Available Under Each Regime
4. Break-Even Calculations at ₹7L, ₹10L, ₹12L, ₹15L, ₹20L, ₹30L, ₹50L and ₹1Cr
5. Form 10-IEA and the Opt-Out Mechanism
6. Salaried vs Business Income Considerations
7. Senior Citizens, Super-Senior Citizens and HUFs
8. Home Loan, NPS, Insurance and ELSS Impact
9. Practical Decision Framework
10. Expert Insight
11. Key Takeaways
12. Frequently Asked Questions

1. The New and Old Regime Under the Income-tax Act, 2025

The Income-tax Act, 2025 (30 of 2025) was enacted on 21 August 2025 and commenced unconditionally on 1 April 2026. It replaces the Income-tax Act, 1961 in its entirety and introduces a single terminology of “tax year” — the 12-month fiscal period from 1 April to 31 March — replacing the dual concept of previous year and assessment year used under the repealed Act. The first tax year under the new Act is tax year 2026-27 (1 April 2026 to 31 March 2027). Income earned during this period will be assessed under the 2025 Act.

The two regimes that individual and HUF taxpayers must choose between are the “new regime” (the default concessional rate regime carried forward from the Section 115BAC regime of the repealed Act, embedded directly into the 2025 Act without the need for an election to benefit from it) and the “old regime” (the legacy slab structure with Chapter VI-A deductions, available only if the taxpayer opts out of the default). The slabs, rebate levels and standard deduction applicable for tax year 2026-27 reflect the Budget 2025 announcements that were implemented through the Finance Act, 2026 amendments to the 2025 Act.

2. Slabs, Rebate and Standard Deduction

2.1 New regime slabs for tax year 2026-27

Health and education cess of 4 percent applies on the aggregate of tax and surcharge. Surcharge applies at 10 percent for total income between ₹50,00,000 and ₹1,00,00,000, 15 percent for ₹1,00,00,000 to ₹2,00,00,000, 25 percent for ₹2,00,00,000 to ₹5,00,00,000 and 25 percent (capped) above ₹5,00,00,000 — the 37 percent top-bracket surcharge was abolished under the new regime.

2.2 Old regime slabs for tax year 2026-27

2.3 Rebate and standard deduction

• New regime — Section 87A equivalent rebate: Resident individuals with total income up to ₹12,00,000 get a rebate of up to ₹60,000, effectively reducing tax to zero. A marginal relief provision prevents cliff effects for incomes marginally above ₹12,00,000.
• Old regime — Section 87A rebate: Resident individuals with total income up to ₹5,00,000 get a rebate of up to ₹12,500.
• Standard deduction (new regime): ₹75,000 for salaried and pensioner taxpayers. Effective nil-tax threshold for salaried individuals is therefore ₹12,75,000 (₹12,00,000 rebate cap + ₹75,000 standard deduction).
• Standard deduction (old regime): ₹50,000 for salaried and pensioner taxpayers.
• Family pension deduction: ₹25,000 (up from ₹15,000) — available under both regimes.

3. Deductions Available Under Each Regime

The critical observation is that the new regime retains only three material deductions: the enhanced ₹75,000 standard deduction, employer NPS contribution under Section 80CCD(2) equivalent, and the family pension deduction. Everything else — the popular 80C basket, 80D health insurance, 80CCD(1B) additional NPS, 80E education loan, 80G donations, HRA, LTA and home loan interest — is available only under the old regime. Any regime-choice decision is fundamentally a comparison between the value of these lost deductions (under the old regime slabs) and the benefit of the lower new regime slabs plus the larger rebate and standard deduction.

4. Break-Even Calculations at ₹7L, ₹10L, ₹12L, ₹15L, ₹20L, ₹30L, ₹50L and ₹1Cr

The following table is computed for a salaried individual resident in India for tax year 2026-27. “Gross income” means salary before any deduction. New regime tax assumes the ₹75,000 standard deduction and no other deduction. Old regime “break-even deductions” is the total of standard deduction plus all Chapter VI-A-equivalent deductions and HRA/home loan interest that would make old regime tax equal to new regime tax.

*At total income of exactly ₹12,00,000 under the new regime, the ₹60,000 rebate wipes out the tax; marginal relief protects incomes marginally above this level. Figures are rounded for illustration; exact tax depends on the precise composition of income, surcharge application and the cess.

5. Form 10-IEA and the Opt-Out Mechanism

Under the Income-tax Act, 2025 framework, the opt-out mechanism depends on whether the taxpayer has business or profession income.

5.1 Taxpayers with business or profession income

A taxpayer who has income under the head “profits and gains of business or profession” and who wants to be taxed under the old regime must file Form 10-IEA (or its equivalent under the Income-tax Act, 2025 rules) before the due date for furnishing the return of income for the relevant tax year. Once filed, the election applies until the taxpayer withdraws it. The critical restriction is the one-time re-switch rule: a business/profession taxpayer who has opted out and then switches back to the new regime can re-opt back into the old regime only once during their lifetime as long as they continue to have business/profession income. This is an asymmetric protection designed to prevent year-on-year regime arbitrage based on deduction swings.

5.2 Salaried and non-business taxpayers

A taxpayer who does not have any business or profession income — a pure salaried individual, a pensioner, a rental-income-only taxpayer, or a capital-gains-only taxpayer — can switch regimes on a year-on-year basis. No separate Form 10-IEA is required each year. The election is made simply by indicating the chosen regime in the return of income for that year. If the taxpayer does nothing, the default new regime applies.

6. Salaried vs Business Income Considerations

For a salaried individual the decision is mechanical: compute new regime tax and old regime tax each year and pick the lower. There is no downside to switching because the election can be revised each year. For a business or profession income earner, the decision is strategic. Because re-entry to the old regime is effectively a one-time option, business taxpayers should commit to the regime they expect to be better across a multi-year horizon, not just the current year. A chartered accountant running a consultancy practice with relatively stable deductions should prefer the regime that wins across five years; a seasonal business with volatile profits and deductions should usually default to the new regime and only opt out if they are confident the old regime wins consistently.

7. Senior Citizens, Super-Senior Citizens and HUFs

7.1 Senior and super-senior citizens

The new regime does not provide a higher basic exemption for senior citizens (60 to 80 years) or super-senior citizens (above 80 years). All individuals face the same Nil-up-to-₹4,00,000 entry slab. Under the old regime, senior citizens have a basic exemption of ₹3,00,000 and super-senior citizens have ₹5,00,000. Additionally, under the old regime, senior citizens can claim the Section 80TTB equivalent deduction of ₹50,000 on interest from banks and post offices (vs. the ₹10,000 Section 80TTA equivalent for non-seniors) and higher Section 80D health insurance limits. A retired senior with pension, interest income and meaningful medical insurance spend is often better off in the old regime. A senior with income below ₹12,00,000 and no large deductions can stay in the new regime and benefit from the ₹60,000 rebate.

7.2 HUFs

A Hindu Undivided Family is eligible for both regimes. The slabs, rates and rebate mechanism are applied to the HUF in the same way as an individual, with one important exception: the Section 87A-equivalent rebate (₹60,000 new regime, ₹12,500 old regime) is available only to resident individuals, not to HUFs. An HUF cannot rely on the ₹60,000 rebate to bring tax to zero up to ₹12,00,000. For an HUF with meaningful deductions under the old regime, the opt-out is often worthwhile at mid-income levels.

8. Home Loan, NPS, Insurance and ELSS Impact

8.1 Home loan

A home loan is the single biggest swing factor in the regime decision. Interest on a self-occupied home loan is deductible up to ₹2,00,000 per year under the Section 24(b) equivalent, and the principal repayment qualifies within the ₹1,50,000 Section 80C cap — but only under the old regime. For a taxpayer in the 20-30 percent bracket, these two deductions alone generate tax savings of ₹70,000 to ₹1,05,000 per year. A salaried taxpayer with a home loan should always run the break-even maths carefully before defaulting to the new regime.

8.2 NPS

NPS has two distinct tax components. The self-contribution under Sections 80CCD(1) and 80CCD(1B) is only available under the old regime (up to ₹1,50,000 within the 80C cap plus an additional ₹50,000 under 80CCD(1B)). The employer contribution under Section 80CCD(2) equivalent — up to 14 percent of salary for both Government and private sector employees — is available under both regimes. This asymmetry means that a salaried employee whose employer offers corporate NPS with a full 14 percent contribution benefit captures a substantial NPS advantage without needing to opt out of the new regime. Only taxpayers who rely heavily on the additional ₹50,000 self-contribution have an NPS-specific reason to prefer the old regime.

8.3 Insurance and ELSS

Life insurance premiums, ELSS mutual fund investments, PPF, EPF, NSC, Sukanya Samriddhi and similar instruments qualify for the Section 80C equivalent deduction of ₹1,50,000 only under the old regime. Health insurance premiums qualify for the Section 80D equivalent deduction (₹25,000 for self/family under 60, ₹50,000 where any member is a senior citizen, additional ₹25,000 or ₹50,000 for parents) only under the old regime. A taxpayer already committed to annual insurance, ELSS, home loan and NPS spend should sum the effective deductions and run the break-even calculation. If the package exceeds the break-even for their income level, the old regime saves tax.

9. Practical Decision Framework

1. Step 1 — Compute new regime tax: Take gross income, subtract the ₹75,000 standard deduction (if salaried/pension), apply new regime slabs, apply the ₹60,000 rebate if total income ≤ ₹12,00,000, add 4 percent cess and any surcharge.
2. Step 2 — List old regime deductions: Identify every Chapter VI-A-equivalent deduction (80C, 80D, 80CCD(1B), 80E, 80G, 80TTA/TTB), HRA exemption, home loan interest, and the ₹50,000 standard deduction. Sum them.
3. Step 3 — Compute old regime tax: Take gross income, subtract all deductions from Step 2, apply old regime slabs, apply the ₹12,500 rebate if total income ≤ ₹5,00,000, add cess and surcharge.
4. Step 4 — Choose the lower. If the difference is marginal (below ₹10,000) and you are a business/profession taxpayer with a one-time re-switch restriction, stay in the default new regime.
5. Step 5 — Execute: If you have business/profession income and want the old regime, file the Form 10-IEA equivalent before the due date of the return. If you are a salaried individual, simply indicate the chosen regime in the return.
6. Step 6 — Re-run every year: Income, deductions, home loan balances, HRA, family situation and surcharge thresholds all change. The regime that was optimal last year may not be optimal this year.

Related reading within our Income-tax Act, 2025 series

• Income-tax Act, 2025 — Complete Overview and Transition Guide
• Tax Year Concept Under the Income-tax Act, 2025
• New Regime Slabs for Tax Year 2026-27
• Section 87A Rebate Under the 2025 Act
• Chapter VIII Deductions Under the Income-tax Act, 2025
• Capital Gains Under the 2025 Act for Tax Year 2026-27
• Transfer Pricing Under the Income-tax Act, 2025

Expert Insight

Key Takeaways

• The Income-tax Act, 2025 (30 of 2025) received assent on 21 August 2025 and commenced on 1 April 2026. The first tax year is tax year 2026-27.
• The new regime is the default for tax year 2026-27. The old regime is available only on opt-out.
• New regime slabs: Nil/5/10/15/20/25/30 percent across the ₹4L/₹8L/₹12L/₹16L/₹20L/₹24L breakpoints.
• ₹60,000 Section 87A equivalent rebate zero-rates tax up to ₹12,00,000 of total income (resident individuals only).
• Salaried effective nil-tax threshold: ₹12,75,000 after the ₹75,000 standard deduction.
• Old regime unlocks 80C, 80D, 80CCD(1B), 80E, HRA, LTA and ₹2,00,000 home loan interest — none of these are available under the new regime.
• Break-even deductions: ~₹4,25,000 at ₹15L, ~₹5,00,000 at ₹20L, ~₹5,50,000 at ₹30L, ~₹5,75,000 at ₹50L, ~₹6,00,000 at ₹1Cr.
• Form 10-IEA is required for business/profession income to opt out; salaried can switch each year in the return.
• Business/profession taxpayers have a one-time re-entry restriction — choose carefully.
• Senior citizens without rebate coverage and HUFs (no Sec 87A rebate) often still benefit from the old regime.
• Re-run the comparison every tax year — optimal regime changes with income and deduction mix.

Frequently Asked Questions