Old vs New Tax Regime AY 2025-26: Which Saves More? (Worked Examples)

Since FY 2023-24, the new tax regime has been the default. Most employees who didn't actively opt out are filing under it. For a meaningful chunk — roughly 40% of salaried Indians by various estimates — the old regime would have saved them money. The math isn't hard; it's just that nobody runs it.

This guide walks through the actual numbers: when the old regime wins, when the new regime wins, where the breakeven sits, and four worked examples covering common income levels.

The two regimes side-by-side (FY 2024-25 / AY 2025-26)

The new regime has lower nominal rates and a higher rebate ceiling (₹7L vs ₹5L). The old regime has higher rates but lets you deduct a long list of items.

The simple rule of thumb

The breakeven hinges almost entirely on how much you can deduct under the old regime. Specifically:

• If your annual deductions (HRA exempt + 80C + 80D + 24(b) home loan interest + others) total ≥ ₹4.5 lakh: OLD regime usually wins.
• If your annual deductions total ≤ ₹3 lakh: NEW regime usually wins.
• Between ₹3-4.5 lakh: it depends on your income bracket. Run both via our Income Tax Calculator.

Worked example 1: Junior employee, ₹8 lakh salary

Sneha, 27, software engineer in Bangalore. CTC ₹8L. Lives with parents (no rent, no HRA claim). 80C: ₹50k EPF only. No home loan, no health insurance.

• New regime: Income ₹8L − ₹75k std deduction = ₹7.25L. Tax = ₹0 (87A rebate kicks in up to ₹7L; ₹7.25L is just over, so she pays tax on the entire amount above ₹3L = ~₹13,750 + cess = ~₹14,300).
• Old regime: Income ₹8L − ₹50k std − ₹50k 80C = ₹7L. Tax = ₹52,500 (5% of ₹2.5L + 20% of ₹2L) + cess = ~₹54,600.

Winner: New regime saves ₹40,300/year.

Worked example 2: Mid-career, ₹15 lakh salary, max deductions

Rahul, 35, marketing manager in Mumbai. CTC ₹15L. Pays rent ₹35k/mo (HRA exempt ~₹2L), 80C ₹1.5L (PPF + ELSS), 80D ₹50k (parents' health insurance), home loan interest ₹2L (Section 24).

• New regime: Income ₹15L − ₹75k = ₹14.25L. Tax = ~₹1.42L + cess.
• Old regime: Income ₹15L − ₹50k std − ₹2L HRA − ₹1.5L 80C − ₹50k 80D − ₹2L 24(b) = ₹8.5L. Tax = ~₹85,500 + cess.

Winner: Old regime saves ~₹56,000/year. The HRA + home loan combination is the killer move for old-regime advantage.

Worked example 3: ₹25 lakh salary, modest deductions

Priya, 42, HR director in Delhi. CTC ₹25L. Owns a flat (no rent, no HRA). 80C ₹1.5L. 80D ₹25k. No active home loan (paid off). No NPS.

• New regime: Income ₹25L − ₹75k = ₹24.25L. Tax = ~₹4.25L + cess.
• Old regime: Income ₹25L − ₹50k − ₹1.5L − ₹25k = ₹22.75L. Tax = ~₹4.92L + cess.

Winner: New regime saves ~₹67,000/year. Without HRA or home loan, ₹1.75L of deductions doesn't close the gap to old regime's higher rates at this income level.

Worked example 4: ₹50 lakh salary, surcharge zone

Anand, 48, senior consultant. CTC ₹50L. HRA exempt ₹4L, 80C ₹1.5L, 80D ₹50k, home loan ₹2L. Total deductions: ₹8L.

• New regime: Income ₹50L − ₹75k = ₹49.25L. Tax + 10% surcharge + 4% cess = ~₹13.7L.
• Old regime: Income ₹50L − ₹50k − ₹8L = ₹41.5L. Tax + 10% surcharge + cess = ~₹13.4L.

Winner: Old regime saves ~₹30,000/year — but it's close. At ₹50L, both regimes hit the 30% bracket and surcharges, narrowing the gap.

The breakeven calculator

Use our Income Tax Calculator to plug in your specific numbers. It runs both regimes side-by-side and tells you which saves you more, factoring in surcharge, 4% cess, and Section 87A rebate.

Things people get wrong

• Forgetting to add HRA exempt to deductions when comparing. HRA is the single largest old-regime deduction for renting employees — often ₹1-3 lakh. Use our HRA Calculator to compute the exact exempt portion first.
• Confusing the rebate with the deduction. 87A rebate at ₹7L (new) and ₹5L (old) is a tax cliff, not a deduction. Income one rupee over the threshold makes the full tax payable.
• Not considering NPS 80CCD(1B). ₹50k NPS contribution is deductible in old regime AND new regime (the rare exception that survives in new regime). Frequently missed.
• Annual switch isn't free for everyone. Salaried employees can switch yearly. Business / professional income? You can opt out of the new regime once but switching back has restrictions. Read CBDT's notification before flip-flopping.

Decision framework

Don't pick a regime; pick a profile:

• Renter + 80C maxed + 80D + home loan: Old regime. Almost certain.
• Living with family + only 80C/EPF: New regime. Almost certain.
• Self-employed / freelancer with low fixed deductions: New regime, plus 80CCD(1B) NPS for the rare exception.
• Senior citizen (60-80) with FD interest: Old regime usually wins because of higher exemption (₹3L) and 80TTB (interest deduction up to ₹50k).
• HNI (₹1cr+) with family office: Run both with full numbers; surcharge math gets complex.

Once a year — when you submit declarations to your employer in March-April — re-run the comparison. Lifestyle changes (rented to owned, kids born, EMI started, parent's health insurance) move the needle. Set a calendar reminder.

Frequently asked

Can I file ITR under one regime if my employer deducted TDS under another?Yes. You declare the regime in your ITR; whatever was deducted at source is credited (or refunded). This is why the year-end ITR can produce a refund even after the employer deducted “correctly”.

What if I want to switch regimes mid-year?You can't — declared regime applies for the whole financial year. But you can change your declaration to your employer for next year, OR you can choose differently when filing your ITR (the ITR choice trumps the employer's TDS choice).

Is the new regime really default?Yes, since FY 2023-24. If you don't actively choose old regime, your employer applies new regime for TDS. Submit Form 10-IEA with your employer to opt for old regime.