Old vs New Tax Regime 2026: Which Saves You More Money? [Calculator Inside]

The most important financial decision you will make this April takes 30 seconds but most people get it wrong.

Every April, your employer asks: which tax regime do you want? Most people guess. A few ask their CA. Almost nobody actually runs the numbers for their specific income and deduction profile.

This article fixes that. You will leave here with an exact number — how much you save under each regime — not a vague "it depends" answer.

The one-minute answer

New regime wins for most salaried people in 2026. Here is the condition under which old regime wins:

Your total deductions — HRA + 80C + 80D + home loan interest + NPS — must exceed a specific threshold for your income level. At ₹15 lakh salary, that threshold is ₹5,43,750. Most people do not cross it without a home loan.

If you are renting and investing normally, the new regime almost certainly saves you more. Use the calculator below to confirm with your exact numbers.

What changed on April 1, 2026?

Two things happened simultaneously and people are confusing them.

Change 1 — The New Income Tax Act 2025 became law. India's 62-year-old Income Tax Act 1961 was replaced by a cleaner, simpler statute. This is largely a housekeeping exercise: section numbers changed (80C is now Section 123, 80D is now Section 124, and so on), forms were renamed, and language was simplified. The tax rates, slabs, deduction limits, and rebate amounts did NOT change. If you file ITR for FY 2025–26 this July, the old 1961 Act still applies to your return.

Change 2 — The new regime is the default more strictly than before. From FY 2023-24 onwards, new regime has been the default. But from April 2026, employers are applying this more strictly — your TDS is being deducted under the new regime from your very first April payslip unless you have submitted a written declaration to HR choosing the old regime. If you want the old regime, act now.

What did NOT change: tax slabs, standard deduction amounts, Section 87A rebate amounts, deduction limits under 80C/80D/24B. Budget 2026 made no changes to these.

Old vs New Tax Regime at a glance

For salaried individuals with no business income only.

Tax calculator: find your answer in 30 seconds

Adjust the sliders to match your income and deductions. The calculator applies official FY 2025–26 slabs, the Section 87A rebate, CBDT-defined marginal relief, and 4% cess.

Income tax slabs: old vs new regime FY 2025-26

New regime slabs (Budget 2025, effective FY 2025-26)

Standard deduction: ₹75,000 · Section 87A rebate: ₹60,000 if taxable ≤ ₹12L · 4% cess applies

Old regime slabs (unchanged)

Standard deduction: ₹50,000 · Section 87A rebate: ₹12,500 if taxable ≤ ₹5L · 4% cess applies

Senior citizens (60–80 years) get a higher basic exemption of ₹3 lakh under the old regime. Super senior citizens (80+) get ₹5 lakh. No such benefit exists under the new regime.

One number that explains why the new regime wins for most

The old regime jumps to a 20% rate the moment taxable income crosses ₹5 lakh. The new regime stays at 5–10% all the way up to ₹12 lakh. This wider, gentler slab structure is the new regime's core advantage — and it is significant.

What deductions does the new regime take away?

This is the trade-off. The new regime's lower rates come at a cost: almost every popular tax-saving deduction disappears.

Deductions only available under old regime

What you keep under the new regime

The employer NPS deduction (80CCD(2)) being higher at 14% under the new regime (vs 10% under old regime) is a meaningful benefit if your employer offers this. On a ₹10 lakh basic salary, that is ₹1.4 lakh in deductions — automatically, without you needing to invest anything extra.

Salary-wise worked examples

All calculations use official FY 2025-26 slabs with 4% cess. Old regime examples assume standard set of deductions. New regime uses only the ₹75,000 standard deduction.

₹8 lakh gross salary

New regime:

• Taxable income: ₹8,00,000 − ₹75,000 = ₹7,25,000
• Tax: (₹7,25,000 − ₹4,00,000) × 5% = ₹16,250
• Section 87A rebate: ₹16,250 (full rebate, taxable ≤ ₹12L)
• Final tax: ₹0

Old regime (with ₹50K std + ₹1.5L 80C + ₹25K 80D = ₹2.25L deductions):

• Taxable income: ₹8,00,000 − ₹2,25,000 = ₹5,75,000
• Tax: ₹12,500 + (₹75,000 × 20%) = ₹12,500 + ₹15,000 = ₹27,500
• Section 87A: taxable > ₹5L, no rebate
• Final tax with cess: ₹28,600

Verdict: New regime saves ₹28,600 at ₹8L salary even after 80C and health insurance.

₹12 lakh gross salary

New regime:

• Taxable income: ₹12,00,000 − ₹75,000 = ₹11,25,000
• Tax: ₹20,000 + ₹32,500 = ₹52,500
• Section 87A rebate: ₹52,500 (full rebate, taxable ≤ ₹12L)
• Final tax: ₹0

Old regime (with ₹50K std + ₹1.5L 80C + ₹25K 80D + ₹1.2L HRA = ₹3.45L deductions):

• Taxable income: ₹12,00,000 − ₹3,45,000 = ₹8,55,000
• Tax: ₹12,500 + (₹3,55,000 × 20%) = ₹12,500 + ₹71,000 = ₹83,500
• Section 87A: taxable > ₹5L, no rebate
• Final tax with cess: ₹86,840

Verdict: New regime saves ₹86,840 at ₹12L. Old regime has no path to zero at this income.

₹15 lakh gross salary

New regime:

• Taxable income: ₹15,00,000 − ₹75,000 = ₹14,25,000
• Tax: ₹20,000 + ₹40,000 + (₹2,25,000 × 15%) = ₹93,750
• No 87A rebate (taxable > ₹12L)
• Final tax with cess: ₹97,500

Old regime (with ₹50K std + ₹1.5L 80C + ₹25K 80D + ₹1.2L HRA = ₹3.45L deductions):

• Taxable income: ₹15,00,000 − ₹3,45,000 = ₹11,55,000
• Tax: ₹12,500 + ₹1,00,000 + (₹1,55,000 × 30%) = ₹1,59,000
• Final tax with cess: ₹1,65,360

Old regime — adding home loan interest ₹2L (₹5.45L total deductions):

• Taxable income: ₹9,55,000
• Tax: ₹12,500 + ₹90,000 + (₹0 × 30%) = ₹1,02,500... let me correct:
  • 0–₹2.5L: 0
  • ₹2.5L–₹5L: ₹12,500
  • ₹5L–₹9.55L: ₹91,000
  • Total: ₹1,03,500
• Final with cess: ₹1,07,640

Verdict at ₹15L: New regime (₹97,500) still wins even after home loan. You need ₹5,43,750 in deductions (excluding std deduction) to break even — typically needs both high rent AND active home loan.

₹20 lakh gross salary

New regime:

• Taxable income: ₹19,25,000
• Tax: ₹20,000 + ₹40,000 + ₹60,000 + (₹3,25,000 × 20%) = ₹1,85,000
• Final tax with cess: ₹1,92,400

Old regime (with ₹50K std + ₹1.5L 80C + ₹50K 80D + ₹1.5L HRA + ₹2L home loan + ₹50K NPS = ₹6L deductions):

• Taxable income: ₹14,00,000
• Tax: ₹12,500 + ₹1,00,000 + ₹1,20,000 = ₹2,32,500
• Final with cess: ₹2,41,800

Verdict at ₹20L: New regime saves ₹49,400 even with ₹6L in deductions. Breakeven needs ₹7,08,330 — extremely difficult to achieve without exceptional circumstances.

₹30 lakh gross salary

New regime:

• Taxable income: ₹29,25,000
• Tax: ₹20,000 + ₹40,000 + ₹60,000 + ₹80,000 + ₹1,00,000 + (₹5,25,000 × 30%) = ₹4,57,500
• Final tax with cess: ₹4,75,800

Old regime (maximum reasonable deductions: ₹50K std + ₹1.5L 80C + ₹75K 80D + ₹2L home loan + ₹1.5L HRA + ₹50K NPS = ₹6.75L):

• Taxable income: ₹23,25,000
• Tax: ₹12,500 + ₹1,00,000 + (₹13,25,000 × 30%) = ₹5,10,000
• Final with cess: ₹5,30,400

Verdict at ₹30L: New regime saves ₹54,600 even at maximum deductions. Old regime loses at high incomes because the 30% rate kicks in much earlier (above ₹10L) vs new regime (above ₹24L).

The breakeven rule: when exactly does old regime win?

The breakeven deduction table below shows the minimum total deductions (excluding standard deduction) you need under the old regime to pay the same tax as the new regime. If your deductions exceed this threshold, old regime saves more.

Source: ClearTax analysis of official FY 2025-26 slabs. Income here is gross salary.

The practical takeaway: Most salaried people can realistically claim 80C (₹1.5L) + 80D (₹25–50K) + HRA (₹1–2L depending on rent) = roughly ₹3–4L in deductions. To beat new regime at ₹15L, you need ₹5.44L. The gap is typically bridged only by a home loan with significant interest outgo (₹2L) on top of everything else.

Who should choose the new tax regime?

Go with new regime if:

• Your gross salary is ₹12.75 lakh or below — your tax is already ₹0, nothing to optimise
• You do not pay rent or own your home — HRA exemption is unavailable, removing one of the biggest old-regime advantages
• You do not have a home loan or have nearly paid it off — without ₹2L in interest, old regime's strongest deduction is gone
• You prefer simplicity — no need to track investments, submit rent receipts, or plan around lock-in periods for ELSS/PPF
• You want higher monthly in-hand salary — new regime means lower TDS, more cash every month
• Your total deductions are below the breakeven threshold for your income level

Who should choose the old tax regime?

Old regime makes mathematical sense when all of the following are true:

• You pay significant rent and can claim HRA (₹1.5L+ annually)
• You have an active home loan with ₹1.5–2L or more in annual interest payments
• You consistently max out 80C (₹1.5L in PPF, ELSS, LIC, or EPF)
• You pay health insurance for yourself and senior-citizen parents (₹50–75K in 80D)
• Your combined deductions exceed the breakeven threshold for your salary

Senior citizens in particular should carefully evaluate the old regime. It offers a higher basic exemption (₹3L vs ₹2.5L under old, same ₹4L under new), plus the 80TTB deduction (₹50K on interest income), which is not available in the new regime.

One important myth: ₹12L salary ≠ automatic zero tax

This misconception is spreading rapidly and costing people money.

The belief: "My salary is ₹15 lakh. Tax applies only on the ₹3 lakh above ₹12 lakh."

The reality: The Section 87A rebate is all-or-nothing. If your taxable income exceeds ₹12 lakh, the rebate vanishes entirely — and tax is calculated from scratch on your full taxable income using all applicable slabs, not just the excess.

Example: Taxable income of ₹12.5L (gross salary ₹13.25L):

• Tax without relief: ₹60,000 + (₹50,000 × 15%) = ₹67,500
• Section 87A: taxable > ₹12L, rebate = ₹0
• Without marginal relief, cess brings this to ₹70,200

However, CBDT has confirmed a marginal relief mechanism for incomes just above ₹12L: the tax payable cannot exceed the income earned above the ₹12L threshold. So at ₹12.5L taxable income, tax is capped at ₹50,000 (the excess over ₹12L), making the final tax ₹52,000 with cess. This relief only applies until approximately ₹12.71L taxable income, after which regular computation takes over.

The bottom line: your ₹15L salary does not get any marginal relief. Full tax applies.

How to declare your tax regime for FY 2025-26

Step 1 — Decide early. Run the calculator above. If old regime wins, act immediately — TDS deduction under new regime starts from your April payslip.

Step 2 — Submit to your employer. To choose old regime, submit a written declaration to your HR or payroll team. No standard form is required — a simple email stating your preference for the old tax regime for FY 2025-26 is sufficient. Do this before April payroll processing.

Step 3 — Verify in payslip. Your payslip should reflect the correct TDS amount. Cross-check against a quick manual calculation using the slabs above.

Step 4 — Reconsider at ITR filing. Even if your employer deducted TDS under one regime, you can choose differently at ITR filing time. If you chose old regime with your employer but new regime turns out better at filing, you pay/receive the difference. The deadline for ITR-1 and ITR-2 (most salaried employees) is July 31, 2026.

Can you switch every year? Yes, salaried employees with no business income can switch regimes every single year. If you pay off your home loan this year, switch to new regime next year. If your rent doubles, recalculate.

The one exception: if you have income from business or profession, you can opt out of new regime once, but switching back is a one-way door.

What the New Income Tax Act 2025 actually changes

The New Income Tax Act 2025 took effect April 1, 2026. Most of what you read is alarming but accurate to note: very little changes for the average salaried taxpayer in practical terms.

What changed:

• Section numbers: 80C → Section 123, 80D → Section 124, 10(13A) for HRA → retained under new Act numbering. The benefits remain identical.
• Forms renamed: Form 16 becomes Form 130, Form 26AS becomes Form 168. Content is the same.
• "Tax Year" replaces FY/AY: "Tax Year 2026-27" is the new way of referring to what was "FY 2026-27 / AY 2027-28." Less confusing in theory, requires adjustment in practice.
• Revised return deadline extended: You can now revise your ITR up to March 31 of the following year (previously December 31).
• ITR-3 and ITR-4 due date: Extended to August 31 for non-audit cases.
• HRA city expansion: From April 2026, the 50% HRA exemption city list now includes Bengaluru, Pune, Hyderabad, and Ahmedabad alongside the existing Delhi, Mumbai, Kolkata, and Chennai.

What did NOT change: slabs, rates, deduction amounts, 87A rebate amounts, or the choice between regimes. This is a simplification exercise, not a tax hike or cut.

For FY 2025-26 returns filed in 2026: still governed by the old Income Tax Act 1961. The new Act applies to Tax Year 2026-27 onwards.

The bottom line

The new tax regime is the right choice for most salaried Indians in 2026. The math is clear: wider slabs, a ₹75K standard deduction, and the ₹60K Section 87A rebate combine to outperform old-regime deductions for the majority of earners.

Old regime still makes sense for a specific group: people with active home loans generating ₹2L+ in annual interest, paying significant rent and claiming HRA, and maxing out 80C and 80D consistently. For everyone else — especially anyone below ₹12.75L gross — the new regime is the straightforward winner.

Use the calculator at the top of this article every April when your employer asks for your declaration. Numbers change when loans get paid off, when you move cities, or when ELSS lock-ins expire. The right answer is not permanent — it is situational.

All tax calculations are based on official income tax slabs and provisions for FY 2025-26 (AY 2026-27) as notified by the Ministry of Finance and CBDT. Section 87A rebate amounts and marginal relief are as clarified by CBDT. This article is for educational purposes only and does not constitute tax advice. Please consult a qualified Chartered Accountant for advice specific to your financial situation. Tax laws are subject to change.