Old vs New Tax Regime: FY 2024-25

TL;DR

From FY 2024-25 onwards, the new tax regime is the default.

The choice between the old and new tax regime is the most consequential personal-finance decision for a salaried employee or small-business owner in India today. From FY 2024-25 (AY 2025-26) onwards, the new regime is the default — the Income Tax Department assumes you are on the new regime unless you actively opt out and file using the old regime. The choice is not locked; you can switch every year when you file your ITR. This post is the practical primer — the mechanics, the break-even calculation, the procedural steps, and the year-on-year switching decision. The companion deep-dive, Old vs new tax regime: FY 2024-25 math, covers nine worked profiles and the procedural traps.

The Two Regimes at a Glance

New Tax Regime (Default from FY 2024-25)

Tax Slabs:

Income Range	Tax Rate
Up to ₹3 lakh	Nil
₹3 – ₹7 lakh	5%
₹7 – ₹10 lakh	10%
₹10 – ₹12 lakh	15%
₹12 – ₹15 lakh	20%
Above ₹15 lakh	30%

Key Features:

• Rebate under Section 87A: tax up to ₹7 lakh is fully refunded — effectively nil tax for total income up to ₹7 lakh (after standard deduction).
• Standard deduction of ₹75,000 for salaried / pensioners — a deduction from salary / pension, applied before the slabs.
• Most exemptions and deductions are not available: HRA, 80C, 80D, 80E, 80G, 80CCD(1B), 80TTA, home loan interest under 24(b), LTA, etc.
• Only specific exemptions remain: Section 17(2)(vi) (Sodexo meal vouchers, telephone reimbursement), 80CCD(2) (employer NPS contribution up to 14% of salary), and a few notified items.
• Family pension deduction under Section 57(iia) of ₹15,000 (or 1/3 of pension, whichever is lower); for senior citizens, the higher of the two thresholds may apply.

Old Tax Regime (Opt-In)

Tax Slabs:

Income Range	Tax Rate
Up to ₹2.5 lakh	Nil
₹2.5 – ₹5 lakh	5%
₹5 – ₹10 lakh	20%
Above ₹10 lakh	30%

Key Features:

• Rebate under Section 87A: tax up to ₹5 lakh is fully refunded (under old slabs).
• Standard deduction of ₹50,000 (separately, not built into the slabs).
• All major deductions available: 80C (₹1.5 lakh), 80D (₹25,000–₹1 lakh depending on age and coverage), 80CCD(1B) NPS (₹50,000 over and above 80C), 80E (education loan), 80G (donations), 80TTA / 80TTB (interest), HRA, home loan interest under 24(b) (up to ₹2 lakh), LTA, and others.

The Break-Even — When Each Regime Wins

The break-even depends on how many deductions you actually use in the old regime. Four deductions typically decide it:

Deduction	Old Regime Limit	Approximate Tax Value (30% bracket)
Home loan interest (Section 24(b))	Up to ₹2 lakh	Up to ₹60,000
HRA exemption	Varies (metro 50% / non-metro 40% of basic)	Varies
80C investments	Up to ₹1.5 lakh	Up to ₹45,000
80D health insurance	Up to ₹1 lakh (parents senior)	Up to ₹30,000
80CCD(1B) NPS	₹50,000 additional	₹15,000

If your combined deduction stack exceeds ₹2 lakh in the old regime, the old regime almost always wins. If your deduction stack is below ₹1 lakh, the new regime usually wins.

The Decision Matrix

Situation	Better Regime
Income ₹3–7 lakh, minimal deductions	New (rebate covers all tax)
Income ₹7–12 lakh, standard salaried, no home loan	New (lower slabs win)
Income ₹12–20 lakh, has 80C + 80D + HRA + home loan	Old (deductions outweigh slab benefit)
Income ₹20 lakh+, has home loan + 80C + 80D	Old (deductions very valuable)
Senior citizens with pension/investment income, no rent paid	New (lower slabs, no HRA benefit in old regime)
Freelancers with no home loan, no HRA	New (lower slabs win)
Freelancers with home loan	Old (Section 24(b) deduction is large)
Salaried with high HRA (paying ₹30,000+ rent in metro)	Old (HRA exemption alone can be ₹2+ lakh)

The Switch Mechanics

At the start of the FY (employer-level)

If you are a salaried employee, declare the regime choice to your employer through the HR / payroll portal. Most employers open the declaration window in April. The employer computes the TDS for the year based on the declared regime.

If you declare the old regime, the employer applies all your declared deductions (HRA, 80C, 80D, etc.) and computes the lower TDS. If you declare the new regime, the employer applies only the standard deduction (₹75,000) and computes the TDS on the resulting taxable income.

Mid-year switch

You can change the declaration mid-year. The employer re-computes the TDS for the remaining months. The mid-year change is for TDS purposes only — the final ITR is filed on the regime that minimises your overall tax.

At the time of filing ITR (final regime choice)

The ITR is filed on the regime that produces the lower tax. The employer may have deducted TDS on the new regime, but if the old regime produces a lower tax in your ITR, you can claim a refund.

The ITR form has a section to declare the regime choice. The default is the new regime (the form auto-selects if you don’t override). To opt for the old regime, select the relevant checkbox in Part A (general information) and complete Part B (computation) with the deductions claimed.

What you cannot do

You cannot claim the new regime’s lower slabs AND the old regime’s deductions. The choice is binary.

If you have business income (ITR-3) and choose the new regime, depreciation under Section 32 and certain brought-forward losses have specific limits under Section 115BAC. Unabsorbed depreciation can be carried forward and set off against future business income under the new regime. Brought-forward business losses (other than loss from house property) are allowed to be carried forward and set off in subsequent years under the new regime, subject to the normal Section 72 limits and the requirement to maintain books of accounts and (where applicable) get them audited under Section 44AB. The decision affects the entire computation.

The Procedural Gotchas

Gotcha 1 — TDS under Rule 21AGA

From April 2024 onwards, employers are required to deduct TDS under the new regime by default under Rule 21AGA. If you want the old regime, you must declare it explicitly. The employer’s HR portal must have the declaration in time for the April payroll.

If you do not declare the old regime and your employer deducts under the new regime, you can file the ITR under the old regime and claim a refund. The cash-flow impact during the year is, however, adverse — you over-pay TDS each month.

Gotcha 2 — Mid-year switch and Form 12B / 12BBA

If you switch employers mid-year, the new employer’s TDS is on the new regime by default. To align the new employer’s TDS with the old regime, file Form 12B (for relief under Section 89(1) on salary from the previous employer) and Form 12BBA (declaration of income / claim of deductions with the new employer) before March. The new employer adjusts the TDS for the remaining months.

Gotcha 3 — Business income and Section 80 deductions

Under the new regime, business income is taxed at slab rates. The Section 80 deductions (80C, 80D, etc.) are not available for business income. If you have business income plus salary, the regime choice affects the entire computation.

Gotcha 4 — Capital gains treatment

Capital gains are taxed at special rates regardless of the regime. As amended from 23 July 2024: STCG under Section 111A on listed equity / equity-oriented units is 20%; LTCG under Section 112A on listed equity / equity-oriented units is 12.5% on gains above ₹1.25 lakh per year (without indexation). The regime choice does not affect the capital gains tax. The rebate under Section 87A does not apply to capital gains.

Gotcha 5 — The 4% cess

Both regimes have the 4% Health and Education Cess on the tax + surcharge. The cess is not optional.

Worked Examples

Example 1 — Salaried employee, ₹15 lakh, home loan

Profile: ₹15 lakh salary (₹9 lakh basic + ₹6 lakh allowances), ₹3 lakh HRA component, paying ₹30,000 rent in Mumbai, ₹2 lakh home loan interest, ₹1.5 lakh 80C, ₹50,000 80D.

Old regime:

Item	Amount (₹)
Salary	15,00,000
Less: Standard deduction	(50,000)
Less: HRA exemption (least of: actual HRA 3L, 50% basic 4.5L, rent - 10% basic = 3.6L - 0.9L = 2.7L → least 2.7L)	(2,70,000)
Less: 24(b) home loan interest	(2,00,000)
Less: 80C	(1,50,000)
Less: 80D	(50,000)
Taxable income	8,30,000

Tax on ₹8.3L under old slabs: ₹12,500 (5% on ₹2.5–5L) + ₹66,000 (20% on ₹5–8.3L) = ₹78,500 + 4% cess = ₹81,640.

New regime:

Item	Amount (₹)
Salary	15,00,000
Less: Standard deduction (₹75,000)	(75,000)
Taxable income	14,25,000

Tax on ₹14.25L under new slabs: ₹20,000 (5% on ₹3–7L) + ₹30,000 (10% on ₹7–10L) + ₹30,000 (15% on ₹10–12L) + ₹45,000 (20% on ₹12–14.25L) = ₹1,25,000 + 4% cess = ₹1,30,000.

Old regime wins by ~₹48,000.

Example 2 — Freelancer, ₹25 lakh, no home loan

Profile: ₹25 lakh professional receipts (no business income, presumptive not opted), ₹3 lakh sub-contractor fees, ₹6 lakh in tools and software, no home loan, no rent paid (works from home), ₹50,000 80CCD(1B), ₹25,000 80D.

Old regime:

Item	Amount (₹)
Professional receipts	25,00,000
Less: Standard deduction	(50,000)
Less: 80CCD(1B)	(50,000)
Less: 80D	(25,000)
Taxable income	23,75,000

Tax on ₹23.75L under old slabs: ₹12,500 + ₹1,00,000 + ₹4,12,500 = ₹5,25,000 + 4% cess = ₹5,46,000.

New regime:

Item	Amount (₹)
Professional receipts	25,00,000
Less: Standard deduction	(75,000)
Taxable income	24,25,000

Tax on ₹24.25L under new slabs: ₹20,000 + ₹30,000 + ₹30,000 + ₹60,000 + ₹2,77,500 = ₹4,17,500 + 4% cess = ₹4,34,200.

New regime wins by ~₹1.12 lakh.

Example 3 — Senior citizen, ₹10 lakh interest income

Profile: ₹10 lakh interest from FDs and savings, ₹50,000 80TTB, ₹50,000 80D, no other income.

Old regime:

Item	Amount (₹)
Interest income	10,00,000
Less: Standard deduction	(50,000)
Less: 80TTB	(50,000)
Less: 80D	(50,000)
Taxable income	8,50,000

Tax on ₹8.5L under old slabs: ₹12,500 + ₹70,000 = ₹82,500 + 4% cess = ₹85,800.

New regime:

Item	Amount (₹)
Interest income	10,00,000
Less: Standard deduction	(75,000)
Taxable income	9,25,000

Tax on ₹9.25L under new slabs: ₹20,000 (5% on ₹3–7L) + ₹22,500 (10% on ₹7–9.25L) = ₹42,500 + 4% cess = ₹44,200.

New regime wins by ~₹41,600.

The break-even in the senior profile is narrow — the deduction stack is meaningful (₹1.5L), but the slab differential tips the scale.

Year-on-Year Switching

You can switch every year. The choice in FY 2024-25 does not lock you into the new regime for FY 2025-26. Each year, when filing the ITR, you choose the regime that produces the lower tax for that year.

The switching cost is zero. The procedural steps are the same. The employer declaration is for TDS purposes only and is reset every year.

The pattern most taxpayers follow:

• Year 1 — declare the new regime (default), file under the old regime, claim refund.
• Year 2 — declare the old regime to the employer, file under the old regime, no refund needed.

This pattern maximises the cash-flow benefit (lower TDS during the year) but requires the employer to support the mid-year switch.

When to Get Help

The regime choice is consequential but not complicated. The decision matrix above is a reasonable starting point. If your profile is unusual (foreign income, capital gains, business income, rental income), the choice requires a calculation.

We routinely review both regimes for our clients and file the ITR on the lower-tax option. Our ITR filing service covers the regime choice, the computation, the ITR preparation, and the e-verification. Share your income summary on WhatsApp for a no-charge regime assessment.

For the deep-dive with nine worked profiles and the procedural traps, see our Old vs new tax regime: FY 2024-25 math guide. For the ITR form selection, see our which ITR form guide.

Sources

• Income Tax Act — Section 115BAC, Section 87A, Section 16, Section 80C, Section 80D, Section 24(b)
• CBDT — Notifications under new tax regime
• Income Tax Department — Tax calculator