Old vs New Tax Regime Calculator (FY 2025-26)

What Is the Old vs New Tax Regime Calculator?

The Old vs New Tax Regime Calculator is a free comparison tool that calculates your income tax under both Indian tax regimes for FY 2025-26 (AY 2026-27) and tells you which one saves more money. You enter your annual salary and deductions once, and the calculator instantly shows taxable income, tax payable, effective tax rate and annual savings under each regime.

Since the new regime is now the default under Section 115BAC of the Income Tax Act, every salaried employee must actively decide whether to stay in it or opt for the old regime at the start of the financial year. Picking the wrong regime can cost you anywhere from a few thousand to over a lakh in extra tax. This calculator removes the guesswork with exact numbers.

All calculations run privately in your browser. Nothing you enter is stored or sent to any server.

Income Tax Slabs for FY 2025-26: Old vs New Regime

The calculator uses the official slab rates announced in Budget 2025 and applicable for FY 2025-26 (AY 2026-27).

New Tax Regime Slabs (Default)

Under the new regime, the Section 87A rebate makes taxable income up to ₹12 lakh completely tax free. With the ₹75,000 standard deduction, a salaried employee pays zero tax up to a gross salary of ₹12.75 lakh.

Old Tax Regime Slabs (Below 60 Years)

Under the old regime, the Section 87A rebate applies only when taxable income is ₹5 lakh or less. A 4% health and education cess is added to the tax amount in both regimes.

Key Differences Between Old and New Tax Regime

How the Calculator Works: Formula and Logic

The calculator applies the same method the Income Tax Department uses, so you can verify every number.

Old regime: Taxable income = Gross income minus ₹50,000 standard deduction minus all your deductions (80C, 80D, NPS, HRA exemption, home loan interest, other Chapter VI-A). Tax is then computed on the old slabs, the 87A rebate is applied if taxable income is ₹5 lakh or below, and 4% cess is added.

New regime: Taxable income = Gross income minus ₹75,000 standard deduction only. Tax is computed on the new slabs, the 87A rebate zeroes out tax up to ₹12 lakh taxable income, marginal relief is applied just above ₹12 lakh, and 4% cess is added.

The calculator also enforces legal caps automatically: ₹1.5 lakh on 80C, ₹50,000 on NPS 80CCD(1B) and ₹2 lakh on home loan interest for a self-occupied house.

What Is Marginal Relief?

Marginal relief protects taxpayers whose income just crosses ₹12 lakh in the new regime. Without it, earning ₹12.10 lakh would trigger over ₹60,000 in tax while ₹12 lakh pays zero. With marginal relief, your tax can never exceed the income you earned above ₹12 lakh. On a taxable income of ₹12.25 lakh, tax is capped at ₹25,000 plus cess instead of the slab-based ₹63,750. This calculator applies marginal relief automatically. For a deeper breakdown, use our Marginal Relief Tax Calculator.

The Breakeven Rule: When Does the Old Regime Win?

The breakeven point is the total deduction amount at which both regimes produce identical tax. If your deductions exceed the breakeven for your income, the old regime saves you money. Below it, the new regime wins.

There is no single breakeven number. It changes with income. Here is the FY 2025-26 breakeven table for salaried employees (standard deduction difference already accounted for):

Two insights most taxpayers miss:

First, below ₹12.75 lakh salary the new regime is always equal or better, no matter how much you invest. Do not lock money in tax-saving products just to compete with a zero.

Second, the breakeven briefly spikes near ₹13 lakh because marginal relief keeps new regime tax tiny there. It dips around ₹14 lakh, then climbs steadily. At ₹25 lakh and above you need a full ₹8 lakh in deductions, which usually requires maximum 80C, 80D, NPS, ₹2 lakh home loan interest and a large HRA exemption combined.

How to Use the Old vs New Tax Regime Calculator

Step 1: Enter Your Income

Enter your annual gross salary (total CTC salary income before tax). Add other income such as savings interest, FD interest or rental income in the second field. Not sure of your in-hand figure? Cross-check with our Take Home Salary Calculator.

Step 2: Enter Old Regime Deductions

Fill in only what you actually claim:

• Section 80C: PPF, ELSS, EPF, LIC premiums, home loan principal. Capped at ₹1.5 lakh. Plan this limit with our Tax Saver Calculator.
• Section 80D: Health insurance premiums for self, family and parents.
• NPS 80CCD(1B): Extra ₹50,000 over the 80C limit. Estimate your corpus with the NPS Calculator.
• HRA exemption: Use the HRA Exemption Calculator first, then paste the result here.
• Home loan interest: Section 24b interest, capped at ₹2 lakh for self-occupied property.
• Other Chapter VI-A: 80E education loan interest, 80G donations, 80TTA and similar.

Step 3: Read the Recommendation

The calculator instantly shows taxable income and tax under both regimes, highlights the winner, and states your exact annual saving and effective tax rate. The donut chart shows how much of your income you keep versus pay as tax.

Worked Examples for FY 2025-26

Example 1: ₹12.75 Lakh Salary, No Deductions

Priya earns ₹12.75 lakh with no major investments. New regime: taxable income ₹12 lakh, tax zero due to the 87A rebate. Old regime: taxable income ₹12.25 lakh, tax ₹1,87,200 including cess. The new regime saves her ₹1,87,200. No realistic amount of investing changes this outcome.

Example 2: ₹18 Lakh Salary, Strong Deductions, New Regime Still Wins

Rahul earns ₹18 lakh and claims ₹5.75 lakh in deductions: full ₹1.5 lakh 80C, ₹25,000 80D, ₹50,000 NPS, ₹1.5 lakh HRA exemption and ₹2 lakh home loan interest. Old regime tax: ₹1,71,600. New regime tax: ₹1,50,800. Despite heavy deductions, the new regime still saves ₹20,800 because his breakeven at ₹18 lakh is ₹6.42 lakh.

Example 3: ₹18 Lakh Salary, High Metro Rent, Old Regime Wins

Same salary, but Anita pays high metro rent and her HRA exemption is ₹2.5 lakh, taking total deductions to ₹6.75 lakh. Old regime tax: ₹1,40,400. New regime tax: ₹1,50,800. The old regime now saves ₹10,400 a year. This is why HRA is usually the deciding factor at higher incomes.

Features of This Calculator

• Side-by-side comparison: Old and new regime taxable income, tax and effective rate in one view, with the better regime highlighted.
• All major deductions supported: 80C, 80D, NPS 80CCD(1B), other Chapter VI-A, HRA exemption and Section 24b home loan interest, with legal caps applied automatically.
• Quick income scenarios: One-tap presets for entry level, zero-tax ₹12.75 lakh, senior professional and home loan profiles.
• Tax by income level table: Ready comparison of both regimes at taxable incomes from ₹3 lakh to ₹25 lakh.
• Marginal relief and 87A rebate built in: Applied automatically in both regimes as per FY 2025-26 rules.
• Share and export: Share a personalized link, download a result image or export the full comparison as CSV.
• Privacy-first: 100% free, no sign-up, and every calculation runs in your browser.

Who Should Choose Which Regime?

New Regime Usually Wins If You

Earn up to ₹12.75 lakh, live in your own or family home with no HRA claim, have no home loan, or prefer liquidity over locking ₹1.5 lakh in tax-saving products every year. Freelancers and consultants with few deductions also typically pay less here.

Old Regime Usually Wins If You

Pay high metro rent with a large HRA exemption, service a home loan with ₹2 lakh annual interest, and already max out 80C, 80D and NPS. In practice the old regime mostly wins for incomes above ₹14 lakh with combined deductions past the breakeven shown in the table above. Considering prepaying that home loan instead? Compare outcomes with our Loan Prepayment vs Investing Calculator.

Important Assumptions and Limitations

• Rates apply to resident individuals below 60 under FY 2025-26 (AY 2026-27) rules, including 4% health and education cess.
• Surcharge on taxable income above ₹50 lakh is not included. High earners should treat results as indicative.
• Old regime senior citizen slabs (₹3 lakh and ₹5 lakh basic exemption) are not modeled separately.
• HRA exemption must be computed separately and entered as a value. The calculator does not derive it from rent.
• Employer NPS under 80CCD(2), available in both regimes, is not modeled and would reduce tax equally in each.
• TDS already deducted by your employer is not netted off. Estimate that with our TDS Calculator.

Common Mistakes to Avoid

1. Comparing regimes without HRA. HRA is often the single largest old regime deduction. Skipping it makes the new regime look falsely better.
2. Investing ₹1.5 lakh in 80C at incomes below ₹12.75 lakh purely to save tax. Your new regime tax is already zero. Invest for returns, not for a deduction you cannot use. Compare options with the ELSS Calculator and PPF Calculator.
3. Entering CTC instead of taxable salary components. Employer PF contribution and gratuity provisions inside CTC are not taxed as salary.
4. Assuming the regime choice is permanent. Salaried taxpayers can switch every year at ITR filing.
5. Ignoring the regime declared to your employer. If your employer deducts TDS under the wrong regime, you must claim the refund at filing. Plan quarterly liability with the Advance Tax Calculator.

Expert Tips for FY 2025-26

• Re-run the comparison every April and again before proof submission. A salary hike, new home loan or rent change can flip the answer. Model your raise first with the Salary Hike Calculator.
• If you are within ₹50,000 to ₹1 lakh above the ₹12 lakh taxable threshold, check the marginal relief numbers. Salary restructuring or employer NPS can pull you into the zero-tax zone.
• If the two regimes are within ₹5,000 of each other, prefer the new regime for simplicity and liquidity.
• Old regime filers with home loans should file with the full Income Tax Calculator to include every deduction before ITR submission.

Key Takeaways

• The new regime is the default for FY 2025-26 and gives salaried employees zero tax up to ₹12.75 lakh gross salary.
• Standard deduction is ₹75,000 in the new regime versus ₹50,000 in the old regime.
• The old regime only wins when total deductions cross the breakeven for your income, roughly ₹5.2 lakh to ₹8 lakh.
• HRA plus ₹2 lakh home loan interest is the most common combination that pushes taxpayers past breakeven.
• Salaried individuals can switch regimes every year, so re-check annually with this calculator.

Frequently Asked Questions