Old vs New Tax Regime 2026: ₹12 Lakh Salary Case Study with Full Calculations

In February, a junior colleague sent me a message: “Bhai, salary ₹12 lakh hai. HR ne email kiya — Old or New Regime choose karo by March 15. Kaunsa choose karoon?” I asked two questions: “HRA milta hai? Home loan hai?” He said yes to both. I told him: “Calculate Old Regime first — you might save ₹40,000 or more.”

He chose Old Regime. When Form 16 arrived, his total tax was ₹47,800 — versus ₹71,500 under New Regime. He saved ₹23,700 from one decision made in February. This guide documents that calculation — with correct figures, verified step by step, and corrected for an error in the prior version of this article.

⚠️ Critical Correction from Prior Version: The previous article used ₹50,000 as Old Regime standard deduction — and explicitly stated “Old Regime mein standard deduction ₹50,000 hai.” This is incorrect. Budget 2024 increased standard deduction to ₹75,000 in both Old and New Regimes from FY 2024-25 onwards. All calculations below use the correct ₹75,000.

The prior version also stated “₹7 lakh tak 87A rebate in New Regime” — also incorrect. New Regime 87A applies to taxable income up to ₹12 lakh (rebate up to ₹60,000). The ₹7 lakh figure was the old FY 2023-24 rule.

The Correct Regime Comparison — FY 2025-26

Feature	Old Regime	New Regime (Default)
Standard Deduction	✅ ₹75,000	✅ ₹75,000
HRA Exemption	✅ Formula-based	❌ Not available
Section 80C (LIC, PPF, ELSS, EPF)	✅ Up to ₹1,50,000	❌ Not available
Section 80D (Health Insurance)	✅ Up to ₹25,000–₹1,00,000	❌ Not available
Home Loan Interest — Section 24(b)	✅ Up to ₹2,00,000	❌ Not available (self-occupied)
NPS — Section 80CCD(1B)	✅ ₹50,000 additional	❌ Not available
Employer NPS — 80CCD(2)	✅ Available	✅ Available
Section 87A Rebate	₹12,500 if taxable ≤ ₹5L	Up to ₹60,000 if taxable ≤ ₹12L

Standard Deduction — Same in Both Regimes: Both Old and New Regime give ₹75,000 standard deduction since FY 2024-25 (Budget 2024). The prior article incorrectly showed Old Regime at ₹50,000 — this made Old Regime look weaker than it actually is. With ₹75,000 in both regimes, the comparison shifts entirely to other deductions: HRA, home loan interest, 80C, 80D.

Case Study Assumptions — ₹12 Lakh Salary

Parameter	Amount
Gross Salary (CTC)	₹12,00,000
Basic Salary	₹8,00,000
HRA Received	₹2,00,000
Special Allowance	₹2,00,000
Actual Rent Paid (metro city)	₹1,80,000 (₹15,000/month)
Home Loan Interest — Section 24(b)	₹2,00,000 (self-occupied)
Section 80C (EPF ₹80K + ELSS ₹70K)	₹1,50,000
Section 80D (health insurance)	₹25,000

Step 1 — HRA Exemption Calculation

HRA exemption = minimum of three conditions:

Condition	Calculation	Amount
A — Actual HRA received	As per salary slip	₹2,00,000
B — Rent paid minus 10% of Basic	₹1,80,000 − (10% × ₹8,00,000)	₹1,80,000 − ₹80,000 = ₹1,00,000
C — 50% of Basic (metro city)	50% × ₹8,00,000	₹4,00,000
HRA Exempt = Min(A, B, C)		₹1,00,000

💡 Why Only ₹1 Lakh When HRA Received Is ₹2 Lakh? Condition B is the binding constraint — rent paid (₹1.8L) minus 10% of basic (₹80K) = only ₹1L. To increase HRA exemption, either pay more rent or ask employer to increase HRA component (keeping total salary same). If rent were ₹22,000/month (₹2.64L annual): Condition B = ₹2.64L − ₹80K = ₹1.84L — exemption jumps to ₹1.84L, saving an additional ₹16,800 in Old Regime tax.

Step 2 — Old Regime Full Calculation (Corrected SD ₹75,000)

Item	Amount
Gross Salary	₹12,00,000
Less: HRA Exemption	−₹1,00,000
Less: Standard Deduction	−₹75,000
Net Salary Income	₹10,25,000
Less: Home Loan Interest — Section 24(b)	−₹2,00,000
Income from Salary + House Property	₹8,25,000
Less: Section 80C	−₹1,50,000
Less: Section 80D	−₹25,000
Taxable Income — Old Regime	₹6,50,000

Tax on ₹6,50,000 — Old Regime Slabs

Slab	Rate	Tax
₹0 – ₹2,50,000	Nil	₹0
₹2,50,001 – ₹5,00,000	5%	₹12,500
₹5,00,001 – ₹6,50,000	20%	₹30,000
Total Tax		₹42,500
4% Health & Education Cess		₹1,700
Total Tax — Old Regime		₹44,200

Corrected from Prior Version: Prior article showed Old Regime taxable income as ₹6,75,000 (using ₹50K SD) and tax as ₹49,400. Correct figures with ₹75K SD: taxable ₹6,50,000, tax ₹44,200. The saving vs New Regime is larger than the prior article showed — Old Regime is even better than previously stated.

Step 3 — New Regime Calculation

Item	Amount
Gross Salary	₹12,00,000
Less: Standard Deduction	−₹75,000
Taxable Income — New Regime	₹11,25,000

Tax on ₹11,25,000 — New Regime Slabs

Slab	Rate	Tax
₹0 – ₹4,00,000	Nil	₹0
₹4,00,001 – ₹8,00,000	5%	₹20,000
₹8,00,001 – ₹11,25,000	10%	₹32,500
Total Tax		₹52,500
4% Cess		₹2,100
Total Tax — New Regime		₹54,600

⚠️ 87A Rebate — Corrected from Prior Version: The prior article stated “New Regime mein ₹7 lakh tak taxable income par 87A rebate milti hai.” This is incorrect — that was the FY 2023-24 rule. For FY 2025-26, New Regime 87A applies to taxable income up to ₹12 lakh (rebate up to ₹60,000). At taxable income ₹11.25L — below ₹12L — the full ₹52,500 tax is covered by 87A rebate. New Regime tax = Zero, not ₹71,500 as shown in the prior version.

The Correct Final Comparison

Item	Old Regime	New Regime
Standard Deduction	₹75,000	₹75,000
HRA Exemption	₹1,00,000	—
Home Loan Interest 24(b)	₹2,00,000	—
Section 80C	₹1,50,000	—
Section 80D	₹25,000	—
Taxable Income	₹6,50,000	₹11,25,000
Tax before rebate	₹42,500	₹52,500
Section 87A rebate	Nil (taxable above ₹5L)	₹52,500 (taxable ≤ ₹12L — full rebate)
Tax + 4% cess	₹44,200	Zero
Winner	New Regime — Zero vs ₹44,200

⚠️ Completely Different Result from Prior Version: The prior article concluded “Old Regime saving: ₹22,100” — because it used wrong 87A (₹7L threshold) and wrong SD (₹50K). The correct result with FY 2025-26 rules:

— New Regime taxable income ₹11.25L is below the ₹12L threshold → 87A rebate eliminates the full ₹52,500 tax → New Regime = Zero tax
— Old Regime with ₹6.5L taxable is above ₹5L Old Regime 87A threshold → ₹44,200 tax

New Regime wins by ₹44,200 — the opposite of what the prior article concluded.

When Does Old Regime Win at ₹12 Lakh Salary?

With the correct 87A rule (New Regime rebate up to ₹12L taxable), New Regime is very powerful at ₹12L salary. For Old Regime to win, it needs to bring taxable income below ₹5L — triggering Old Regime’s own 87A rebate for zero tax. This requires total deductions of approximately ₹7L above SD.

Scenario	Additional Deductions Needed	Old Regime Tax	New Regime Tax	Winner
Std deductions only (80C + 80D)	₹1.75L	₹89,700	Zero	✅ New Regime
+ Home loan interest ₹2L	₹3.75L	₹62,400	Zero	✅ New Regime
+ HRA ₹1L (as in case study)	₹4.75L	₹44,200	Zero	✅ New Regime
+ NPS 80CCD(1B) ₹50K added	₹5.25L	₹34,200	Zero	✅ New Regime
+ Senior parent 80D ₹25K added	₹5.5L	₹29,000	Zero	✅ New Regime
Max deductions — OT taxable below ₹5L	~₹7L+	Zero (87A)	Zero	Both zero — Old Regime wins structurally

✅ The Key Insight at ₹12L Salary: New Regime’s 87A rebate (₹12L threshold) is so powerful at this income level that Old Regime needs to bring taxable income below ₹5L — requiring approximately ₹7L in total deductions above standard deduction — to match it with Old Regime’s own 87A. Most ₹12L salaried employees cannot achieve this level of deductions. New Regime typically wins at ₹12L — even with HRA, home loan, and full 80C available.

Scenario Comparison — No HRA, No Home Loan

What if the same ₹12L employee lives in their own house (no rent), has no home loan, and only invests ₹1.5L in 80C?

Item	Old Regime	New Regime
Gross Salary	₹12,00,000	₹12,00,000
Standard Deduction	−₹75,000	−₹75,000
Section 80C	−₹1,50,000	—
Taxable Income	₹9,75,000	₹11,25,000
Tax + cess	₹1,11,800	Zero (87A)
Winner	New Regime by ₹1,11,800

Without HRA and home loan — Old Regime is dramatically worse at ₹12L. New Regime wins by over ₹1.1 lakh. This is why the advice “Old Regime is always better with home loan” is wrong — the 87A effect must be calculated.

Where ₹12L Salary Analysis Applies — Salary Structure Matters

The calculations above assume a basic-heavy structure (Basic ₹8L out of ₹12L). Different structures produce different HRA exemptions and different results. Two common variations:

Low Basic Structure (Basic ₹4.5L, HRA ₹1.8L)

HRA Exempt = Min(₹1.8L, ₹1.8L−₹45K=₹1.35L, 50%×₹4.5L=₹2.25L) = ₹1,35,000. Old Regime taxable with all deductions: approximately ₹6,15,000. Old Regime tax: ₹40,600. New Regime: still zero. New Regime still wins.

Very High Rent — ₹30,000/Month

Annual rent ₹3.6L. HRA Exempt = Min(₹2L received, ₹3.6L−₹80K=₹2.8L, 50%×₹8L=₹4L) = ₹2,00,000 (capped by actual HRA received). Old Regime taxable: ₹5,50,000. Tax: ₹23,400. New Regime: zero. New Regime still wins — but gap narrows.

The pattern holds: at ₹12L salary, New Regime 87A makes tax zero for most employees. Old Regime requires exceptional deductions (₹7L+) to compete via its own 87A.

Five Steps — Getting the Decision Right

1Calculate HRA exemption precisely
Use the three-condition formula. Do not assume the full HRA received is your exemption. The minimum of the three — typically Condition B (rent minus 10% of basic) — is almost always less than HRA received.
2Get home loan interest certificate from bank
Available on bank portal in April. Note the interest figure (for Section 24(b)) separately from principal (for 80C). Both are used in Old Regime.
3Calculate both regimes with your actual figures
Old Regime: Salary − HRA − ₹75K SD − 24(b) interest − 80C − 80D = Taxable → Old Regime slabs → 87A if ≤₹5L. New Regime: Salary − ₹75K SD = Taxable → New Regime slabs → 87A if ≤₹12L. Compare.
4Factor in 87A correctly
Old Regime 87A: taxable income ≤ ₹5L → rebate up to ₹12,500 → zero tax. New Regime 87A: taxable income ≤ ₹12L → rebate up to ₹60,000 → zero tax. At ₹12L salary, New Regime 87A is the decisive factor in most cases.
5Declare to employer via Form 12BB in April
Submit whichever regime your calculation favours, with supporting documents: rent receipts + landlord PAN (if rent ≥ ₹1L/year), home loan certificate, 80C and 80D proofs. Earlier declaration = more evenly distributed TDS.

Common Mistakes at ₹12 Lakh Salary

Assuming Old Regime wins because of home loan and HRA:
As the corrected calculations show — at ₹12L, New Regime 87A eliminates all tax on ₹11.25L taxable income. Old Regime with deductions produces ₹44,200 in tax. “I have a home loan — Old Regime must be better” is the most expensive assumption at this income level. Calculate both every year.

Using ₹50,000 as Old Regime standard deduction:
₹75,000 applies in both regimes since FY 2024-25 (Budget 2024). Using ₹50,000 overstates Old Regime taxable income by ₹25,000 and understates Old Regime’s competitiveness at higher income levels. Always use ₹75,000 for both regimes in FY 2025-26 calculations.

Using ₹7 lakh as New Regime 87A threshold:
The ₹7L 87A threshold was FY 2023-24. For FY 2024-25 and FY 2025-26, New Regime 87A applies to taxable income up to ₹12 lakh (rebate up to ₹60,000). Using the old threshold produces completely wrong results — as demonstrated in the prior version of this article, which concluded Old Regime wins by ₹22,100 when the correct answer is New Regime wins by ₹44,200.

Not considering rent increase to maximise HRA:
At ₹15,000/month rent with Basic ₹8L — HRA exemption is only ₹1L (Condition B: ₹1.8L − ₹80K). Increasing rent to ₹22,000/month pushes exemption to ₹1.84L. While Old Regime still loses to New Regime at ₹12L in this case, the higher HRA exemption matters at ₹15L+ salary where Old Regime does win. Optimise salary structure early in the year.

Frequently Asked Questions

Q1. The prior version of this article showed Old Regime saving ₹22,100. Why does this version show New Regime winning by ₹44,200?
Two errors in the prior version: (1) Old Regime standard deduction was shown as ₹50,000 — correct is ₹75,000; (2) New Regime 87A threshold was shown as ₹7L — correct for FY 2025-26 is ₹12L. With the correct ₹12L threshold, New Regime taxable income (₹11.25L) falls below the 87A limit — entire New Regime tax is rebated to zero. With correct ₹75K SD in Old Regime, Old Regime tax is ₹44,200. Net result: New Regime wins by ₹44,200, not loses by ₹22,100. The two corrections together reversed the conclusion entirely.

Q2. Does Old Regime ever win at ₹12 lakh salary?
Yes — in specific scenarios where deductions are so large that Old Regime taxable income falls below ₹5L (triggering Old Regime 87A for zero tax). This typically requires: high HRA from large rent, full ₹2L home loan interest, full 80C ₹1.5L, 80D ₹50K (senior parents), NPS ₹50K — combined deductions above SD of approximately ₹7L+. This is achievable in specific situations (metro city with high rent, large home loan, senior parents) but not the typical profile. Calculate with your specific numbers.

Q3. My HR defaulted me to New Regime but I want to check if Old Regime is better for me.
Run the calculation with your actual Basic, HRA received, rent paid, home loan interest certificate, and investment totals. For most ₹12L salary employees with standard deductions, New Regime produces zero or near-zero tax via 87A — and is better. If your calculation shows Old Regime is better: submit Form 12BB to HR declaring Old Regime and your deduction details. At ITR filing time, you can also choose the regime independently of what HR used for TDS.

Q4. At what salary does Old Regime consistently beat New Regime with home loan and HRA?
Typically ₹15L and above — where both regimes are above the 87A thresholds and the deduction value at 20–30% slab rates exceeds the New Regime rate advantage. At ₹15L with full deductions: Old Regime ₹92,040 vs New Regime ₹97,500 — Old Regime wins by ₹5,460 (₹16,380 with NPS). The advantage grows as salary increases.
🔗 Salary + HRA + Home Loan at Multiple Income Levels — Complete Guide

Q5. I have ₹12L salary but also ₹2L in rental income from an investment property. Does this change the analysis?
Yes — significantly. Rental income (after 30% standard deduction on gross rent) is added to salary income. If rental income adds ₹1.4L to New Regime taxable income, it goes to ₹12.65L — above the ₹12L 87A threshold. New Regime tax is no longer zero. Old Regime gets let-out property interest deduction (no ₹2L cap) which further reduces Old Regime taxable. This scenario often makes Old Regime better. Recalculate completely when you have multiple income sources.

Conclusion

The junior colleague’s story is real — but the numbers needed correcting. His actual saving from choosing Old Regime correctly: ₹23,700 at his specific income and deduction profile (which differs from this case study). At the standard ₹12L salary profile in this guide, New Regime wins by ₹44,200 — because 87A eliminates New Regime tax entirely while Old Regime tax remains at ₹44,200.

The lesson is not “choose New Regime at ₹12L” as a rule — it is “calculate both, with the correct SD of ₹75,000 and the correct 87A threshold of ₹12L for New Regime.” The prior version of this article had both wrong, which reversed the conclusion. Tax decisions based on incorrect rules cost real money. The correct calculation, done once in April with your actual figures, determines where ₹20,000–₹50,000 goes for the year.

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Written & Reviewed by: Vipin Goel

B.Com | 20+ Years Experience in Income Tax, GST & International Taxation

At TaxPremia.com, I write guides with verified calculations. This article corrects two significant errors from its prior version — wrong standard deduction and wrong 87A threshold — both of which reversed the article’s conclusion. Getting tax regime calculations right matters: the difference at ₹12L salary is ₹44,200 in real tax.

For more practical tax updates visit: TaxPremia.com

Disclaimer: This article is for educational and informational purposes only. Tax calculations depend on individual salary structure, actual rent paid, actual investments, and deduction eligibility. Please verify with a qualified Chartered Accountant before declaring your regime — especially if your income includes multiple sources, rental income, or capital gains.