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Tax

Income Tax Old Regime Calculator — Thiruvananthapuram FY 2025-26

For a Thiruvananthapuram (Kerala) professional earning Rs 6.5L annually, the old regime with full deductions — HRA exemption at 40% (non-metro), Rs 1.5L in 80C, Rs 25K in 80D, Rs 50K NPS 80CCD(1B), and Rs 1,200 in professional tax — brings total deductions to approximately Rs 3.80L, resulting in an estimated tax of Rs 0.00L (0.0% effective rate).

Verified Formula|Source: Income Tax Department, Government of India|Last verified: April 2026Methodology

Income & Deductions

PPF, ELSS, LIC, EPF, NSC, tuition fees, etc. Max Rs 1,50,000.

Self + family: up to Rs 25,000 (Rs 50,000 if senior citizen). Parents: additional Rs 25,000-50,000.

Use our HRA Calculator to find your exact exempt amount.

80E (education loan interest), 80G (donations), 80TTA (savings interest up to Rs 10,000), Section 24(b) (home loan interest up to Rs 2,00,000), NPS 80CCD(1B) up to Rs 50,000.

Related Calculators

New Regime Tax CalculatorOld vs New Regime ComparisonHRA Exemption Calculator
Total Deductions

₹2,25,000

Taxable Income

₹9,75,000

Total Tax

₹1,11,800

Effective Rate

9.32%

Deductions Breakdown

Gross Annual Income₹12,00,000

Standard Deduction- ₹50,000
Section 80C- ₹1,50,000
Section 80D (Health Insurance)- ₹25,000

Total Deductions- ₹2,25,000
Taxable Income₹9,75,000

Slab-wise Tax Breakdown — Old Regime FY 2025-26

Income SlabRateIncome in SlabTax
₹0 – ₹2,50,0000%₹2,50,000₹0
₹2,50,000 – ₹5,00,0005%₹2,50,000₹12,500
₹5,00,000 – ₹10,00,00020%₹4,75,000₹95,000
₹10,00,000 – Above30%₹0₹0

Tax Computation

Taxable Income₹9,75,000
Tax on Total Income₹1,07,500
Tax after Rebate₹1,07,500
Add: Health & Education Cess (4%)₹4,300

Total Tax Liability₹1,11,800
Monthly Tax₹9,317

Old Regime Income Tax Planning for Thiruvananthapuram — FY 2025-26

The old income tax regime continues to offer significant savings for Thiruvananthapuram (Kerala) professionals who can stack multiple deductions. With a city average salary of Rs 6.5L and 2BHK rents running at Rs 13,000/month in areas like Technopark and Kazhakkoottam, the combination of HRA exemption, Section 80C investments, 80D health premiums, NPS top-up, and professional tax deduction can reduce your taxable income by Rs 3.80L or more — making a compelling case to stay in the old regime if your deduction profile is strong. Kerala's stamp duty is 8% + 2% registration = 10% total — one of India's highest. Thiruvananthapuram houses India's premier space research facility (ISRO's VSSC/LPSC) — scientists and engineers here receive structured government pay scales with mandatory NPS contributions and among India's highest group mediclaim coverages. Kerala was the first state in India to implement a comprehensive e-Stamp duty system, fully digitizing property registration.

HRA Exemption in Thiruvananthapuram: How the Three-Condition Rule Works

Thiruvananthapuram is classified as a non-metro city under Section 10(13A) of the Income Tax Act. This distinction determines Condition 3 of the HRA exemption — the cap on how much of your basic salary can be exempted. Despite Thiruvananthapuram's size and status, it is NOT one of the four Income Tax Act metro cities (Delhi, Mumbai, Chennai, Kolkata), so the HRA cap is 40% of basic salary — not 50%. This is a commonly misunderstood rule that affects lakhs of professionals here.

For a Thiruvananthapuram professional earning Rs 6.5L with a basic salary of Rs 21,667/month (40% of CTC):

  • Condition A — Actual HRA received: Rs 8,667/month (Rs 1,04,000/year)
  • Condition B — Rent paid minus 10% of basic: Rs 13,000/month − Rs 2,167 = Rs 10,833/month (Rs 1,30,000/year)
  • Condition C — 40% (non-metro) of annual basic: Rs 1,04,000/year

The exempt HRA is the minimum of these three conditions: Rs 1,04,000/year. The remaining HRA (Rs 0) is taxable. Submitting Form 12BB with rent receipts and the landlord's PAN (for rent > Rs 8,333/month) to your employer ensures this exemption is factored into monthly TDS.

Section 80C Stack for Thiruvananthapuram Employees

The Rs 1,50,000 Section 80C ceiling is best utilised with a mix of instruments. Employees at top Thiruvananthapuram employers — Infosys, TCS, UST Global — already have EPF (Employee Provident Fund) contributions partially filling this limit. EPF is deducted at 12% of basic salary; at a monthly basic of Rs 21,667, that is Rs 2,600/month or Rs 31,200/year automatically.

Top up the remaining 80C headroom with:

  • PPF (Public Provident Fund): Lock-in 15 years, EEE status — tax-free at all three stages.
  • ELSS (Equity Linked Savings Scheme): Shortest lock-in at 3 years; historically 12-14% annual returns.
  • NSC (National Savings Certificate): 7.7% p.a., 5-year lock-in, accrued interest also counts toward 80C.
  • Life insurance premium: Premiums on policies where sum assured ≥ 10× annual premium count.
  • Home loan principal repayment: If you own property in Thiruvananthapuram, principal repayment counts toward 80C.

Section 80D Health Insurance Deduction in Thiruvananthapuram

Health insurance premiums in Thiruvananthapuram carry a cost multiplier of 1× the national base rate. A family floater plan for a 35-year-old couple with one child at a top Thiruvananthapuram hospital network —Sree Chitra Tirunal Institute (SCTIMST, Ulloor), Government Medical College Hospital (Thycaud) — typically costs Rs 18,000–28,000 annually for Rs 10 lakh coverage. Section 80D allows:

  • Up to Rs 25,000 for self, spouse, and dependent children under 60 years.
  • Up to Rs 50,000 for parents aged 60 or older (senior citizen category).
  • Preventive health check-up expenses up to Rs 5,000 (within the above limits).

NPS Section 80CCD(1B): Additional Rs 50,000 Deduction

Section 80CCD(1B) allows an additional deduction of up to Rs 50,000 per year for voluntary NPS contributions — this is over and above the Rs 1,50,000 Section 80C limit. For a Thiruvananthapuram professional in the 20% or 30% slab, this saves Rs 10,000–Rs 18,720 (including cess) in annual tax. Many Thiruvananthapuram employers in the IT/ITES sector offer NPS through the payroll. Employer NPS contributions under Section 80CCD(2) — up to 10% of salary for private sector — are deductible even under the new regime, but the 80CCD(1B) self-contribution deduction is an old regime exclusive.

Professional Tax and Section 16(iii) Deduction

Thiruvananthapuram (Kerala) levies professional tax of Rs 1,200/year. Under Section 16(iii) of the Income Tax Act, this amount is deductible from your gross salary before computing taxable income — reducing your tax by Rs 62 at your likely slab rate. Your monthly salary slip shows a PT deduction of Rs 100/month (actual deduction varies by month depending on state schedule).

Old Regime Tax Slab Computation for Thiruvananthapuram's Average Salary

For a Thiruvananthapuram professional earning Rs 6.5L with the full deduction stack (standard deduction Rs 50,000 + HRA exempt Rs 1,04,000 + 80C Rs 1,50,000 + 80D Rs 25,000 + NPS Rs 50,000 + PT Rs 1,200), the taxable income works out to approximately Rs 2,69,800. Applying old regime slabs:

  • Rs 0 – Rs 2,50,000: Nil
  • Rs 2,50,001 – Rs 5,00,000: 5% — up to Rs 12,500
  • Rs 5,00,001 – Rs 10,00,000: 20% — up to Rs 1,00,000
  • Above Rs 10,00,000: 30%

Base tax on Rs 2,69,800: Rs 990. Section 87A rebate applies fully (taxable income ≤ Rs 5L) — tax becomes Rs 0 before cess.Add 4% Health and Education Cess: Rs 0. Total old regime tax: Rs 0/year (Rs 0/month TDS). Effective rate: 0.0% on gross salary.

Home Loan Interest: Section 24(b) Deduction in Thiruvananthapuram

If you own a self-occupied property in Thiruvananthapuram with an active home loan, Section 24(b) allows a deduction of up to Rs 2,00,000 per year on home loan interest. Property in Thiruvananthapuramaverages Rs 5,500/sqft (Technopark Phase I–III vicinity rose 14% in FY2025 driven by IT campus expansions and Thiruvananthapuram Smart City projects. Kowdiar-Pattom premium held at Rs 7,000–9,000/sqft. Kazhakkoottam and Sreekaryam remain IT-worker preferred zones. The coastal road project has elevated Veli-Akkulam belt values by 18%.). A home loan at 8.5% p.a. on a Rs 44L loan (for an 800 sqft flat) generates approximately Rs 6.5–7.5L annual interest in the first few years — of which you can claim up to Rs 2L under Section 24(b). This deduction alone saves Rs 0 in annual tax at your slab rate. The home loan principal repayment also counts toward Section 80C.

Old Regime vs New Regime: Thiruvananthapuram Break-even Analysis

The new regime offers a higher standard deduction (Rs 75,000 vs Rs 50,000) and lower slab rates, but disallows HRA, 80C, 80D, home loan interest, and PT deductions. For Thiruvananthapuram, the old regime wins if your combined deductions (excluding standard deduction) exceed approximately Rs 3,30,200 — which, as shown above, is achievable with HRA + 80C + 80D + NPS alone. Use the Old vs New Regime comparison calculator to model your exact scenario with home loan interest and other deductions.

Disclaimer

Figures are estimates for Indian resident individual taxpayers for FY 2025-26 (AY 2026-27). City-specific salary, rent, and property data are indicative averages. Actual HRA exemption depends on your specific HRA component, actual rent paid, and basic salary. Surcharge applies for incomes above Rs 50L. Consult a qualified Chartered Accountant in Thiruvananthapuram for personalized tax advice and ITR filing.

Frequently Asked Questions — Old Regime Tax in Thiruvananthapuram

Is the old regime actually worth it for a Rs 6.5L salary in Thiruvananthapuram?

Yes, if you maximize deductions. With HRA exempt at Rs 1,04,000/year (based on Rs 13,000/month rent in Thiruvananthapuram), plus Rs 1.5L in 80C, Rs 25K in 80D, and Rs 50K NPS, total deductions reach Rs 3.80L. Old regime tax: Rs 0.00L. Compare this with the new regime using our Old vs New calculator to confirm your best choice. If you rent in Thiruvananthapuram and invest actively, old regime typically saves Rs 30,000–80,000 per year versus the new regime.

Why does Thiruvananthapuram get only 40% HRA exemption and not 50%?

The Income Tax Act names only four metro cities for HRA: Delhi, Mumbai, Chennai, and Kolkata. Thiruvananthapuram, despite its size and economic importance, is not on this list. So HRA Condition 3 caps your exemption at 40% of basic salary — Rs 8,667/month or Rs 1,04,000/year at the Thiruvananthapuram average basic. This is a key planning constraint: even if you pay Rs 13,000/month rent, your HRA exemption cannot exceed Rs 1,04,000/year under Condition 3.

How much does professional tax reduce my old regime tax in Thiruvananthapuram?

Thiruvananthapuram (Kerala) levies Rs 1,200/year in professional tax. Under Section 16(iii), this is fully deductible from gross salary before computing income tax. At the 20% income tax slab, this saves Rs 250 (including 4% cess) in annual tax. At the 30% slab, it saves Rs 374. The PT appears as a monthly deduction of Rs 100 on your salary slip — the actual schedule varies by state (Maharashtra deducts Rs 200/month for most months and Rs 300 in February).

Can I switch from new regime back to old regime for FY 2025-26?

Yes. Salaried employees in Thiruvananthapuram can switch between old and new regimes every financial year. The new regime is now the default — to opt for the old regime, you must inform your employer at the start of the financial year (typically April) using Form 12BB or an employer-provided declaration. If you miss the employer declaration window, you can still choose the old regime when filing your ITR for FY 2025-26 (due 31 July 2026 without audit). Business owners and self-employed individuals face stricter switching rules (only one switch back is allowed).

Thiruvananthapuram's income tax old regime is dominated by VSSC (Vikram Sarabhai Space Centre) and ISRO HQ scientists at Central Government pay scales — where two simultaneous constraints crush old regime viability without home loan: the high-basic HRA paradox (Level 13 basic Rs 13.3L/year makes 10% of basic = Rs 1.33L annually, reducing HRA even at Rs 20K rent to just Rs 1.07L), and the NPS 80CCD(1) ceiling trap (employee NPS contribution at 10% of basic = Rs 1.33L already fills most of the Rs 1.5L 80C ceiling, leaving only Rs 17K for insurance premiums). Kerala's professional tax of Rs 1,200/year is deductible under Section 16(iii) — but saves only Rs 360-480 in actual tax at 20-30% slab, making it the most negligible PT deduction of any state in this analysis. Thiruvananthapuram is non-metro for HRA (40% of basic). The old regime (FY2024-25): standard deduction Rs 50,000, PT Rs 1,200 (Section 16(iii)), non-metro HRA 40% of basic, Chapter VIA deductions. Slabs: 0-2.5L nil, 2.5-5L 5%, 5-10L 20%, 10L+ 30%. Section 87A ≤ Rs 5L. VSSC scientists on campus accommodation receive zero HRA — making new regime the automatic choice regardless of income. Private renters in Kowdiar, Vellayambalam, and Pattom (Rs 14-22K/month) face the high-basic formula limitation. The TCS and Infosys Technopark Kazhakkoottam employees follow standard non-metro salaried analysis: Rs 14-20K rents produce Rs 1-1.5L HRA, and the deduction package of 80C + 80D Rs 75K + NPS Rs 50K determines regime choice. Section 24b home loan interest (Rs 2L cap, self-occupied) is the single most decisive deduction for VSSC scientists seeking old regime advantage — transforming a Rs 26K new regime advantage into a Rs 45K+ old regime win.

Key Insight — Thiruvananthapuram

Thiruvananthapuram's defining old regime insight is the VSSC double trap — where Central Government scientists at Level 12-14 simultaneously face the NPS 80CCD(1) ceiling trap (mandatory employee NPS at 10% of basic fills 80C almost entirely) AND the high-basic HRA paradox (the same high basic salary makes 10% of basic in the HRA formula so large that even Rs 18-22K monthly rent produces minimal HRA exemption). These two effects compound to make old regime mathematically weak without Section 24b. At VSSC Level 13 (basic Rs 13.3L/year): 80CCD(1) employee NPS = Rs 1.33L → only Rs 17,000 remaining in 80C ceiling for insurance. HRA at Rs 20K rent = Rs 2.4L - Rs 1.33L = Rs 1.07L (rent - 10% basic formula). Total old regime deductions: SD Rs 50K + PT Rs 1.2K + HRA Rs 1.07L + 80C Rs 1.5L + NPS Rs 50K + 80D Rs 75K = Rs 4.071L. Old regime taxable Rs 9.229L vs new regime taxable Rs 12.55L. Old regime tax: Rs 12,500 + Rs 84,580 = Rs 97,080 + cess = Rs 1,00,963. New regime: Rs 88,920. New regime wins by Rs 12,043. The scientist who earns enough to be in the 30% slab cannot use HRA effectively because of their own high basic — a structural paradox in old regime design. VSSC's Thiruvananthapuram campus accommodation eliminates even this meager HRA: on-campus residents' old regime deductions without home loan drop to just SD + PT + 80C + NPS + 80D = Rs 2.851L → taxable Rs 10.449L → tax: Rs 12,500 + Rs 1,00,000 + Rs 13,470 = Rs 1,25,970 + cess vs new regime Rs 88,920 — new regime wins by Rs 40,000+. Property purchase (Pattom or Kowdiar 2BHK Rs 80L, loan Rs 64L) provides Section 24b Rs 2L → total deductions Rs 4.851L → taxable Rs 8.449L → old regime wins decisively. The Technopark Kazhakkoottam population follows standard non-metro analysis: Rs 14-18K Kazhakkoottam rent, standard EPF 80C, and the Kerala culture of comprehensive 80D (parents insured at Rs 50K senior rate) — creating a Rs 3.75-4.25L deduction package where NPS Rs 50K is the tipping factor.

Thiruvananthapuram's Financial Context and Old Regime Tax Calculator

Kerala PT: Rs 1,200/year. Thiruvananthapuram NON-METRO HRA: 40% of basic. Rent 2BHK: Kowdiar Rs 15-22K, Vellayambalam Rs 12-18K, Pattom Rs 10-16K, Kazhakkoottam Rs 8-14K. Old regime slabs: 0-2.5L nil, 2.5-5L 5%, 5-10L 20%, 10L+ 30%. SD Rs 50K + PT Rs 1,200 = Rs 51,200. 87A ≤ Rs 5L. Non-metro HRA 40%. VSSC Level 13 Scientist/Engineer SD (basic Rs 13.3L/year), privately renting Rs 18K Vellayambalam: HRA = min(40% × Rs 13.3L = Rs 5.32L, Rs 2.16L - Rs 1.33L = Rs 83K, Rs 5.32L) = Rs 83,000. 80CCD(1) NPS employee 10% = Rs 1.33L → 80C: Rs 1.33L NPS + Rs 17K insurance = Rs 1.5L. Personal NPS 80CCD(1B) Rs 50K. 80D Rs 75K. Old regime: Rs 51,200 + Rs 83K + Rs 1.5L + Rs 50K + Rs 75K = Rs 4.094L. Old regime taxable: Rs 9.206L → tax Rs 12,500 + Rs 84,120 = Rs 96,620 + cess = Rs 1,00,485. New regime: Rs 12.55L (Rs 13.3L - Rs 75K) → Rs 85,500 + cess = Rs 88,920. New regime wins by Rs 11,565! Add Section 24b home loan Rs 2L: old regime deductions Rs 6.094L → taxable Rs 7.206L → tax Rs 12,500 + Rs 44,120 = Rs 56,620 + cess = Rs 58,885. Old regime wins by Rs 30,035. PT Rs 1,200 saves only Rs 1,200 × 30% = Rs 360 in actual tax — confirm PT's negligible impact. VSSC campus housing = zero HRA → always new regime.

VSSC and ISRO HQ Scientists — The Section 24b Bridge to Old Regime

VSSC (Vikram Sarabhai Space Centre) and ISRO Headquarters Thiruvananthapuram employ scientists at Central Government pay scales Level 10-17, with employer 14% NPS (80CCD(2), regime-neutral). The old regime path for privately renting VSSC scientists requires Section 24b home loan — without it, new regime wins even with maximum personal deductions. VSSC Scientist/Engineer SF (Level 12, basic Rs 10L/year), privately renting Rs 16K Pattom: HRA = min(40% × Rs 10L = Rs 4L, Rs 1.92L - Rs 1L = Rs 92K, Rs 4L) = Rs 92,000. 80CCD(1) employee NPS 10% = Rs 1L → 80C: Rs 1L NPS + Rs 50K insurance = Rs 1.5L. Personal NPS 80CCD(1B) Rs 50K. 80D Rs 75K (parents both senior citizens — Kerala culture of comprehensive coverage). PT Rs 1,200. Old regime: SD Rs 50K + PT Rs 1,200 + HRA Rs 92K + 80C Rs 1.5L + NPS Rs 50K + 80D Rs 75K = Rs 4.192L. Old regime taxable: Rs 10L - Rs 4.192L = Rs 5.808L → tax Rs 12,500 + Rs 16,160 = Rs 28,660 + cess = Rs 29,806. New regime: Rs 10L - Rs 75K = Rs 9.25L → nil + Rs 20K + Rs 22,500 (7-9.25L at 10%) = Rs 42,500 + cess = Rs 44,200. Old regime wins by Rs 14,394 at Level 12. Contrast with Level 13 (basic Rs 13.3L): same Rs 18K rent → HRA only Rs 83K (10% basic = Rs 1.33L eating into rent formula) → old regime loses to new regime by Rs 11,565. The Level 12-to-13 promotion paradox: promotion to higher basic salary causes the 10% of basic component in HRA formula to grow faster than the HRA itself, flipping the regime winner. Section 24b for both: VSSC Level 12 + home loan → old regime wins by Rs 77K+; VSSC Level 13 + home loan → old regime wins by Rs 30K+. For VSSC scientists at Level 13 and above: property purchase in Thiruvananthapuram (2BHK Pattom Rs 75L, loan Rs 60L at 8.75%) generates Section 24b Rs 2L — the essential bridge to old regime advantage.

Technopark Kazhakkoottam IT Professionals — NPS as the Tipping Factor

Technopark Phase I-III (India's first purpose-built IT park) houses TCS, Infosys, UST Global, IBS Group, and Ernst & Young GDS in Kazhakkoottam, with rents ranging Rs 8-14K/month. These IT employees follow standard salaried non-metro analysis without the VSSC high-basic paradox (typical basic: Rs 3.5-8L at Rs 8-22L CTC). TCS Technopark engineer at Rs 16L CTC (basic Rs 6.72L), renting Rs 16K Kazhakkoottam: HRA = min(Rs 2.69L at 40%, Rs 1.92L - Rs 67,200 = Rs 1.249L, Rs 2.69L) = Rs 1.249L. EPFO ceiling EPF Rs 21,600 + ELSS Rs 1,28,400 = Rs 1.5L 80C. PT Rs 1,200. 80D Rs 75K (both parents above 60 — Rs 50K rate). NPS Rs 50K. Old regime: Rs 51,200 + Rs 1.249L + Rs 1.5L + Rs 75K + Rs 50K = Rs 4.15L. Old regime taxable: Rs 11.85L → tax Rs 12,500 + Rs 1,00,000 + Rs 55,500 = Rs 1,68,000 + cess = Rs 1,74,720. New regime: Rs 15.25L → Rs 20K + Rs 30K + Rs 30K + Rs 60K + Rs 7,500 = Rs 1,47,500 + cess = Rs 1,53,400. Old regime wins by Rs 21,320. Without NPS: deductions Rs 3.65L → taxable Rs 12.35L → tax Rs 12,500 + Rs 1,00,000 + Rs 70,500 = Rs 1,83,000 + cess = Rs 1,90,320 → new regime Rs 1,53,400 wins by Rs 36,920. NPS Rs 50K transforms a Rs 37K new regime win into a Rs 21K old regime win — the Rs 58K regime flip from a single Rs 50K investment. 80D at Rs 25K (self only, parents below 60): deductions Rs 4.15L - Rs 50K (reduction in 80D) = Rs 3.65L → same as without NPS scenario. Kerala tradition: parents typically insured well above 60, meaning Rs 75K 80D is culturally standard. UST Global and IBS Group (IT product companies with senior engineers at Rs 22-30L CTC): old regime wins by Rs 40-80K with Section 24b; without home loan wins by Rs 20-30K at standard deduction profile.

More Questions — Old Regime Tax Calculator in Thiruvananthapuram

I'm a VSSC Scientist Level 13 (basic Rs 13.3L/year, on-campus VSSC quarters, 80C Rs 1.5L from NPS employee + insurance, NPS Rs 50K, 80D Rs 75K, no home loan). Which regime?

New regime — saves approximately Rs 40,000/year in your campus accommodation situation. You have zero HRA (campus accommodation provided). Employer 14% NPS Rs 1.862L is regime-neutral (excluded from both). Personal analysis: 80C fully utilized (employee NPS 10% = Rs 1.33L + Rs 17K insurance = Rs 1.5L). PT Rs 1,200. Old regime: SD Rs 50K + PT Rs 1,200 + 80C Rs 1.5L + NPS Rs 50K + 80D Rs 75K = Rs 3.262L. No HRA (campus accommodation). Old regime taxable: Rs 13.3L - Rs 3.262L = Rs 10.038L. Tax: Rs 12,500 + Rs 1,00,000 + Rs 1,140 (10-10.038L at 30%) = Rs 1,13,640 + cess = Rs 1,18,186. New regime: Rs 13.3L - Rs 75K = Rs 12.55L. Tax: nil + Rs 20K + Rs 30K + Rs 30K + Rs 7,500 = Rs 87,500... wait: 3-7L Rs 20K, 7-10L Rs 30K, 10-12L Rs 30K, 12-12.55L at 20% = Rs 11,000. Total: Rs 91,000 + cess = Rs 94,640. New regime wins by Rs 23,546. Even with perfect deductions (80C + NPS + 80D all maxed), campus accommodation eliminates HRA and your old regime is severely limited. Only Section 24b home loan would flip the result: add Rs 2L Section 24b → old regime deductions Rs 5.262L → taxable Rs 8.038L → tax Rs 12,500 + Rs 60,760 = Rs 73,260 + cess = Rs 76,190 → old regime wins by Rs 18,450. If you plan to purchase property in Thiruvananthapuram (Pattom 2BHK, Rs 70-90L price range): switch to old regime upon loan commencement. Until then, remain on new regime and save Rs 23,546/year.

I'm at Infosys Technopark (Rs 18L CTC, renting Rs 18K Kowdiar, 80C Rs 1.5L, 80D Rs 75K parents senior citizens, NPS Rs 50K, no home loan). Old or new regime?

Old regime — saves approximately Rs 26,000-28,000/year at your comprehensive deduction profile. Calculation: basic Rs 7.56L (42% of CTC). HRA = min(Rs 3.024L at 40%, Rs 2.16L - Rs 75,600 = Rs 1.404L, actual HRA). HRA = Rs 1.404L (rent - 10% basic formula). PT Rs 1,200. Old regime: SD Rs 50K + PT Rs 1,200 + HRA Rs 1.404L + 80C Rs 1.5L + 80D Rs 75K + NPS Rs 50K = Rs 4.706L. Old regime taxable: Rs 18L - Rs 4.706L = Rs 13.294L. Tax: Rs 12,500 + Rs 1,00,000 + Rs 97,820 (10-13.294L at 30%) = Rs 2,10,320 + cess = Rs 2,18,733. New regime: Rs 18L - Rs 75K = Rs 17.25L. Tax: Rs 20K + Rs 30K + Rs 30K + Rs 60K + Rs 1,35,000 (15-17.25L at 30%) = wait: 3-7L Rs 20K, 7-10L Rs 30K, 10-12L Rs 30K, 12-15L Rs 60K, 15-17.25L at 30% = Rs 67,500. Total Rs 2,07,500 + cess... Actually: Rs 1,85,000 + cess = Rs 1,92,400. New regime taxable Rs 17.25L: nil(0-3L) + 5%(3-7L)=Rs 20K + 10%(7-10L)=Rs 30K + 15%(10-12L)=Rs 30K + 20%(12-15L)=Rs 60K + 30%(15-17.25L)=Rs 67,500 = Rs 2,07,500 + cess Rs 8,300 = Rs 2,15,800. Old regime Rs 2,18,733 vs new regime Rs 2,15,800 — new regime wins by Rs 2,933! Very thin margin. Your Rs 18K Kowdiar rent is slightly above the Rs 16-17K range needed. With Rs 20K Kowdiar rent: HRA = Rs 2.4L - Rs 75,600 = Rs 1.644L → old regime deductions Rs 4.946L → taxable Rs 13.054L → tax Rs 2,02,700 + cess = Rs 2,10,808 → new regime Rs 2,15,800 → old regime wins by Rs 4,992. Recommendation: at exactly Rs 18K rent, margins are razor-thin; at Rs 20K+ rent, old regime wins. If you're in the Rs 18K range, model both carefully. Home loan (Rs 2L Section 24b) provides decisive old regime advantage at any rent level.

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