Old vs New Tax Regime — Complete Guide with Calculator

Old vs New Tax Regime: Which One Should You Choose?

Every salaried Indian faces this choice during tax season: should you go with the old tax regime with its familiar deductions, or opt for the new tax regime with lower slab rates but fewer exemptions?

The answer is not the same for everyone. It depends on your salary structure, how much you claim in deductions, whether you live in rented accommodation, and how much you invest in tax-saving instruments.

This comprehensive guide covers everything you need to know about both regimes for FY 2025-26 (AY 2026-27) — the tax slabs, available deductions, real salary examples, and a clear framework for making the right choice.

Tax Slabs: Old Regime vs New Regime (FY 2025-26)

New Tax Regime Slabs (Default from FY 2023-24)

The new regime is now the default regime. You need to specifically opt out if you want the old regime.

Income Slab	Tax Rate
Up to ₹4,00,000	Nil
₹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%

Key benefit: Standard deduction of ₹75,000 is available under the new regime from FY 2024-25 onwards.

Rebate under Section 87A: If total income does not exceed ₹12,00,000, you get a full tax rebate — effectively making income up to ₹12,75,000 (including standard deduction) tax-free.

Old Tax Regime Slabs

Income Slab	Tax Rate
Up to ₹2,50,000	Nil
₹2,50,001 to ₹5,00,000	5%
₹5,00,001 to ₹10,00,000	20%
Above ₹10,00,000	30%

Key benefit: All deductions and exemptions (80C, 80D, HRA, etc.) are available.

Rebate under Section 87A: If total income does not exceed ₹5,00,000, you get a full tax rebate.

Note: 4% health and education cess applies to the tax amount in both regimes.

Deductions Available Under the Old Regime

The old regime’s biggest advantage is the range of deductions you can claim. Here is the complete list:

Section 80C — Up to ₹1,50,000

The most popular deduction. Eligible instruments include:

• PPF (Public Provident Fund) — up to ₹1.5 lakh/year
• ELSS (Equity Linked Savings Scheme) — mutual funds with 3-year lock-in
• EPF (Employee Provident Fund) — your contribution (deducted from salary)
• Life insurance premiums
• NSC (National Savings Certificate)
• 5-year tax-saver FD
• Tuition fees for up to 2 children
• Home loan principal repayment
• Sukanya Samriddhi Yojana

Most salaried employees easily exhaust the ₹1.5 lakh limit through EPF + one or two other instruments.

Use our PPF Calculator to see how PPF investments grow tax-free over time.

Section 80CCD(1B) — Additional ₹50,000 for NPS

Over and above the ₹1.5 lakh 80C limit, you can claim an extra ₹50,000 deduction for contributions to the National Pension System (NPS).

This is one of the most underused deductions. At the 30% tax bracket, it saves you ₹15,600 in tax.

Use our NPS Calculator to plan your retirement corpus.

Section 80CCD(2) — Employer NPS Contribution

Employer’s contribution to NPS (up to 14% of basic + DA for government employees, 10% for others) is deductible. This deduction is available in both old and new regimes.

Section 80D — Health Insurance Premiums

Premium paid for	Deduction limit
Self, spouse, children	Up to ₹25,000
Parents (below 60)	Additional ₹25,000
Parents (above 60)	Additional ₹50,000
Self (above 60) + Parents (above 60)	Up to ₹1,00,000

HRA Exemption

If you live in rented accommodation and receive House Rent Allowance, the exempt amount is the minimum of:

1. Actual HRA received
2. Rent paid minus 10% of basic salary
3. 50% of basic salary (metro cities) or 40% (non-metro)

For someone earning ₹60,000 basic salary and paying ₹20,000 rent in Bangalore, the monthly HRA exemption would be approximately ₹14,000, saving significant tax.

Use our HRA Calculator to compute your exact exemption.

Section 80E — Education Loan Interest

Interest paid on education loans is fully deductible (no upper limit) for up to 8 years from when you start repaying.

Section 80G — Donations

Donations to approved charitable institutions qualify for 50% or 100% deduction, depending on the organisation.

Section 24(b) — Home Loan Interest

Interest on home loan for a self-occupied property is deductible up to ₹2,00,000 per year.

Standard Deduction

A flat ₹50,000 deduction from salary income (₹75,000 in the new regime from FY 2024-25).

What Is Available Under the New Regime?

The new regime strips away most deductions but offers lower tax rates. Here is what you can claim:

Deduction/Exemption	Available in New Regime?
Standard deduction (₹75,000)	Yes
Employer NPS contribution — 80CCD(2)	Yes
Agniveer contribution — 80CCH	Yes
Section 80C (PPF, ELSS, EPF, etc.)	No
Section 80CCD(1B) — NPS extra ₹50K	No
Section 80D — Health insurance	No
HRA exemption	No
Home loan interest — Section 24(b)	No
LTA (Leave Travel Allowance)	No
Section 80E — Education loan interest	No
Section 80G — Donations	No

The new regime is designed for simplicity. If you do not have significant deductions, the lower slab rates themselves save you tax.

Real Salary Examples: Old vs New Regime

Let us work through three real-world scenarios to see which regime works out better.

Example 1: CTC ₹8,00,000 (Fresher with no investments)

Component	Amount
Basic salary	₹4,00,000
HRA	₹2,00,000
Special allowance	₹2,00,000
Rent paid	Nil (lives with parents)
80C investments	₹48,000 (EPF only)
Health insurance (80D)	Nil

Old regime tax: Gross income ₹8,00,000 minus standard deduction ₹50,000 minus 80C ₹48,000 = ₹7,02,000 taxable. Tax = ₹54,600 + cess = ₹56,784.

New regime tax: Gross income ₹8,00,000 minus standard deduction ₹75,000 = ₹7,25,000 taxable. Tax = ₹20,000 + ₹32,500 = ₹32,500 + cess = ₹33,800.

Winner: New regime saves ₹22,984.

Example 2: CTC ₹15,00,000 (Mid-career, rented flat, some investments)

Component	Amount
Basic salary	₹6,00,000
HRA	₹3,00,000
Special allowance	₹6,00,000
Rent paid	₹18,000/month in Bangalore
80C investments	₹1,50,000 (EPF + ELSS + PPF)
NPS 80CCD(1B)	₹50,000
Health insurance (80D)	₹25,000 (self) + ₹25,000 (parents)
Home loan interest	Nil

HRA exemption calculation:

• Actual HRA: ₹3,00,000
• Rent minus 10% of basic: ₹2,16,000 minus ₹60,000 = ₹1,56,000
• 50% of basic (metro): ₹3,00,000

Minimum = ₹1,56,000

Old regime: ₹15,00,000 minus ₹50,000 (SD) minus ₹1,56,000 (HRA) minus ₹1,50,000 (80C) minus ₹50,000 (NPS) minus ₹50,000 (80D) = ₹10,44,000 taxable. Tax = ₹1,44,300 + cess = ₹1,50,072.

New regime: ₹15,00,000 minus ₹75,000 (SD) = ₹14,25,000 taxable. Tax = ₹20,000 + ₹40,000 + ₹33,750 = ₹1,53,750 + cess = ₹1,59,900.

Winner: Old regime saves ₹9,828.

Example 3: CTC ₹25,00,000 (Senior professional, home loan, max deductions)

Component	Amount
Basic salary	₹10,00,000
HRA	₹5,00,000
Special allowance	₹10,00,000
Rent paid	₹35,000/month in Mumbai
80C investments	₹1,50,000 (maxed out)
NPS 80CCD(1B)	₹50,000
Health insurance (80D)	₹25,000 (self) + ₹50,000 (senior parents)
Home loan interest 24(b)	₹2,00,000

HRA exemption:

• Actual HRA: ₹5,00,000
• Rent minus 10% of basic: ₹4,20,000 minus ₹1,00,000 = ₹3,20,000
• 50% of basic (metro): ₹5,00,000

Minimum = ₹3,20,000

Old regime: ₹25,00,000 minus ₹50,000 minus ₹3,20,000 minus ₹1,50,000 minus ₹50,000 minus ₹75,000 minus ₹2,00,000 = ₹16,55,000 taxable. Tax = ₹3,46,500 + cess = ₹3,60,360.

New regime: ₹25,00,000 minus ₹75,000 = ₹24,25,000 taxable. Tax = ₹20,000 + ₹40,000 + ₹60,000 + ₹80,000 + ₹1,00,000 + ₹6,250 = ₹3,06,250 + cess = ₹3,18,500.

Winner: New regime saves ₹41,860.

Wait — even with maximum deductions, the new regime wins at ₹25 lakh CTC? Yes, because the new regime’s graduated slab structure (with rates stepping up slowly from 5% to 30%) is very effective at higher income levels.

The Breakeven Point

The critical question is: how much in deductions do you need to make the old regime worthwhile?

Here is a rough guide:

Gross Income	Deductions needed for old regime to win
Up to ₹7.5 lakhs	Not worth it — new regime is almost always better
₹7.5L to ₹10L	₹2.5 lakhs+ in deductions
₹10L to ₹15L	₹3.5 lakhs+ in deductions
₹15L to ₹20L	₹4.5 lakhs+ in deductions
Above ₹20L	₹5 lakhs+ in deductions (hard to achieve without home loan)

The higher your income, the harder it becomes for the old regime to win — because the new regime’s lower slab rates compound in your favour.

When the Old Regime Is Better

The old regime wins when you have a combination of these deductions:

1. Large HRA exemption (₹2L+ per year, common in metros)
2. Full 80C utilisation (₹1.5L — most people have this through EPF alone)
3. NPS contribution (₹50,000 under 80CCD(1B))
4. Home loan interest (₹2L under Section 24(b))
5. Health insurance for parents (₹50,000 under 80D for senior citizen parents)

If you stack all of these, total deductions can reach ₹6-7 lakhs, making the old regime favourable for incomes between ₹10-20 lakhs.

When the New Regime Is Better

The new regime wins when:

• You live with parents (no rent, no HRA claim)
• You have no home loan
• Your only deduction is EPF contribution
• You are early in your career with a lower salary
• You do not want the hassle of collecting rent receipts and investment proofs
• Your income is above ₹20 lakhs (the slab advantage is hard to beat)

How to Switch Between Regimes

For salaried employees

• You can switch between regimes every financial year when filing your ITR.
• Inform your employer at the start of the year which regime you are choosing (for TDS purposes).
• The final choice is made when you file your return — you are not locked in by what you told your employer.

For business/profession income

• If you have business income, you can switch to the new regime and back to the old regime only once in your lifetime. After that, you are locked in.
• Salaried individuals do NOT have this restriction.

Practical Decision Framework

Follow this step-by-step process:

1. List all your deductions. Include 80C (EPF + PPF + ELSS + insurance), 80D, HRA, home loan interest, NPS, and any others.

2. Calculate tax under both regimes. Use our Income Tax Calculator — it computes tax under both regimes side by side.

3. Compare the final tax liability. Choose the regime with lower tax.

4. Consider future changes. If you are about to take a home loan or start paying rent, the old regime may become better next year even if the new regime wins this year.

5. Remember: you can switch every year. There is no penalty for changing your choice annually (for salaried employees).

Frequently Asked Questions

Can I claim 80C deductions under the new regime?

No. Section 80C deductions (PPF, ELSS, EPF employee contribution, life insurance, etc.) are not available under the new regime. Only employer’s NPS contribution under 80CCD(2) and the standard deduction are allowed.

Is the new regime mandatory?

The new regime is the default regime from FY 2023-24. But it is not mandatory — you can opt out and choose the old regime when filing your return.

What about EPF contribution — is it wasted under the new regime?

No. Even under the new regime, your EPF continues to grow tax-free. You just cannot claim the employee contribution as a deduction under 80C. The investment benefit remains — only the tax deduction is lost.

If I choose the new regime, should I stop investing in PPF and ELSS?

Not necessarily. PPF and ELSS are good investment products regardless of tax benefits. PPF offers guaranteed 7.1% tax-free returns. ELSS provides equity market exposure. Invest in them for the returns, not just the tax break.

What about capital gains — do they differ between regimes?

No. Capital gains taxation (STCG, LTCG on equity, debt funds, property) is the same under both regimes. The regime choice only affects income from salary, house property, business, and other sources.

Conclusion

The old vs new tax regime decision is personal and changes year to year. There is no universally correct answer.

Use the old regime if you have deductions exceeding ₹3.5-5 lakhs (through a combination of 80C, HRA, home loan interest, NPS, and health insurance).

Use the new regime if your deductions are minimal, you are early in your career, or your income is above ₹20 lakhs where the lower slab rates deliver significant savings.

The best approach: calculate your tax under both regimes every year using our Income Tax Calculator, and pick whichever saves more. You have the freedom to switch annually — use it.