Official 2026 statutory schedule applied by the calculator above. Only income inside each band is taxed at that band’s rate.

India's 2026 default is the new regime — and most salaried workers should start there. Zero tax to ₹4 lakh (plus ₹75,000 standard deduction, so effectively ~₹12.75 lakh can face nil liability after the Section 87A rebate for eligible incomes), then 5–30% slabs to ₹24 lakh with 4% health & education cess on the tax. The old regime (₹2.5L exemption, 5/20/30% with HRA, 80C, 80D deductions) survives only for meticulous claimants; our simulator defaults to new-regime math and documents the crossover. EPF takes 12% of basic+DA (employer-matched, EEE treatment) — retirement saving, not tax, but it leaves take-home identically.

Rebate, surcharge and the ₹12.75 lakh question

Section 87A rebates zero out liability for new-regime incomes up to the notified limit — the single most misunderstood feature: cross the line by ₹10,000 and marginal relief, not the full rebate, applies. Surcharges (10–37% capped at 25% under the new regime) plus 4% cess lift the true top bite above 39% for crore-plus earners. Professional tax (state-wise, ~₹2,500 cap) and standard deduction complete the picture.

NDA (BJP) vs. I.N.D.I.A (Congress) vs. AAP

The NDA/BJP baseline is the new-regime architecture itself: lower slabs, bigger standard deduction, expanded rebate — favouring the ₹8–25 lakh salaried middle class with simplicity. Congress/I.N.D.I.A platforms emphasise raising the rebate/exemption envelope, restoring richer old-regime-style deductions (HRA, education, health) and targeted cash transfers for low-income households — better for sub-₹8 lakh earners and deduction-heavy families. AAP pitches electricity, water, health and education subsidies plus contractual-worker regularisation — smaller income-tax deltas but large effective-household-budget gains for urban low earners. A ₹15 lakh Bengalurean gains most from slab/rebate scenarios; a ₹6 lakh renter from transfer-heavy ones.

Fiscal drag, Indian style

Slabs move only in Budgets, so nominal salary growth steadily pushes workers from nil into 5%, 10%, 15% — Budget 2025's expanded rebate was explicitly a drag-reversal. DA-linked EPF growth compounds it. Always re-run the simulator after each February Budget.

Worked example and verification

₹12,00,000 CTC, new regime, standard deduction ₹75,000: taxable ≈ ₹11,25,000 → slab tax ≈ ₹80,000 + cess ≈ ₹3,200 → in-hand ≈ ₹11,16,800 pre-EPF (≈ ₹93,000/month); EPF ≈ ₹86,400 employee share. Verify with the Income-tax Department calculator; rounding match confirms the engine. Educational simulation only — file per assessment order.

Old vs. new regime: the exact crossover math for 2026

New regime wins by default for most: at ₹12 lakh CTC with standard deduction, liability ≈ ₹83,000. Old regime needs HRA (~₹2.5L exempt for metro renters) + 80C (₹1.5L) + 80D (~₹50k) + NPS to compete — total deductions above ~₹4.5L to break even, rare outside high-rent metros with full 80C/NPS use. At ₹25 lakh, new-regime tax ≈ ₹4.4L vs. old ≈ ₹4.9L even with ₹5L deductions — new still wins. Old regime survives mainly for HRA-heavy Mumbai/Delhi renters with home loans (interest ₹2L) plus NPS. The simulator defaults new-regime and shows the crossover: enter HRA, 80C, 80D, NPS honestly, and take whichever is lower — then vote for whoever keeps your winner winning (parties tinker with rebate limits and standard deduction, which move the crossover).

HRA, 80C, 80D, NPS and professional tax: the deduction stack

HRA exemption = min(rent − 10% salary, 50%/40% salary, actual HRA) — metro renters extract most; gamers of fake receipts face prosecution, not savings. 80C bundles EPF, PPF, ELSS, tuition (₹1.5L cap); 80D covers health premiums (₹25–50k, senior parents double); NPS adds ₹50k exclusive plus employer 10% EEE. Professional tax (₹2,500 cap, state-wise) and LTA/medical structures fine-tune. Bonuses face full slab + cess at accrual; overtime and arrears get Section 89 relief. Salaried filers: max the ₹75k standard deduction (automatic), then stack HRA + NPS — everything else is garnish.

Pre-vote protocol: Budget February decides your year

Re-run the simulator every February post-Budget: rebate limits (87A), slab edges and standard deduction move the crossover by lakhs. Compare party scenarios at your CTC, not averages — ₹6L, ₹15L and ₹50L earners face different winners. Weight EPF/NPS lock-in: pre-tax gains that vest at 60 differ from cash today. Vote the in-hand, verify with the department calculator, file per assessment.

Retirement tomorrow vs. in-hand today: EPF, NPS and the 60-year lock-in

EPF's 12% + 12% plus 8.33% EPS pension diversion compounds EEE (exempt-exempt-exempt) — ₹10,000 monthly from age 25 at 8% ≈ ₹3.5 crore at 58, untaxed. NPS adds ₹50,000 exclusive deduction plus employer 10% EEE: a 30%-slab worker saves ~₹62,000 tax yearly while building pension. Party scenarios touching EPF rates, EPS pension formula or NPS annuity rules (40% annuitisation, 60% lump sum) move lifetime wealth more than slab tweaks — today's in-hand and tomorrow's pension are one decision. APY for informal workers and PM-Vaya for seniors complete the floor.

Rule of thumb: EPF+NPS maximised from 30 ≈ 70%+ replacement of last salary; skipped until 45 ≈ under 30%. Check PF passbook and NPS PRAN before voting on deduction and rebate scenarios — it is the same election as take-home, only more honest.