MAT vs Regular Corporate Tax in India

By Dev Rao | Updated March 2026

Every foreign-invested company in India faces a fundamental tax question: will you pay tax on your regular taxable income, or will Minimum Alternate Tax (MAT) under Section 115JB force you to pay more? MAT exists because some profitable companies — the so-called "zero-tax companies" — used legitimate deductions and exemptions to reduce their taxable income to zero or near-zero, while reporting healthy book profits to shareholders. The government's solution: a 15% floor tax on book profits.

The bottom line: if your Indian subsidiary is newly incorporated with no legacy deductions, opt for Section 115BAA (22% flat rate, no MAT). If you have significant SEZ exemptions or R&D deductions that bring your effective rate below 22%, stay on the regular regime and manage MAT strategically.

This choice is especially consequential for wholly-owned subsidiaries of foreign companies, where the decision to opt into Section 115BAA is irrevocable. Get it wrong, and you are locked into the higher-tax regime permanently.

Quick Comparison Table

How MAT Works — Section 115JB Calculation

MAT is not a separate tax. It is a minimum floor. Every company computes tax liability two ways:

1. Regular method: Apply corporate tax rates (25% or 30%) to taxable income after all deductions
2. MAT method: Apply 15% to book profit (net profit per P&L, adjusted per Section 115JB)

You pay whichever is higher. If MAT exceeds regular tax, the difference becomes MAT credit under Section 115JAA, which you can carry forward for 15 assessment years and use when regular tax exceeds MAT in future years.

Book Profit Adjustments

Book profit is not simply the net profit from your financial statements. Section 115JB requires specific adjustments:

Effective Rate Comparison by Company Profile

Section 115BAA — The Game Changer for Foreign Subsidiaries

Introduced in September 2019, Section 115BAA allows any domestic company to opt for a flat 22% tax rate (effective 25.17% including 10% surcharge and 4% cess). The trade-off: you surrender most deductions and exemptions, and MAT no longer applies.

What You Give Up Under 115BAA

• SEZ profit exemption under Section 10AA (100% for first 5 years, 50% for next 5)
• Additional depreciation under Section 32(1)(iia) on new plant and machinery
• R&D weighted deduction under Section 35(1)(ii) and 35(2AB)
• Investment-linked deductions under Chapter VI-A (Sections 80-IA, 80-IAB, 80-IAC, 80-IB, etc.)
• All existing MAT credit — it lapses immediately on opting in

What You Keep Under 115BAA

• Section 80JJAA deduction for new employee hiring (30% of additional employee cost for 3 years)
• Section 80M deduction for inter-corporate dividends
• Normal depreciation under Section 32 (not additional depreciation)
• Standard business deductions (rent, salaries, operational expenses)

Irrevocability Warning

Once you file Form 10-IC before the due date of your income tax return for the first year of opting in, you cannot switch back to the regular regime. Ever. This is not a year-by-year choice — it is permanent.

MAT Credit — The 15-Year Carry Forward

Under Section 115JAA, the excess of MAT over regular tax creates a credit that can be carried forward for 15 assessment years. This credit is utilized in years when your regular tax liability exceeds MAT.

Practical Calculation Example

Year 1 (FY 2024-25): Meridian Tech Pvt Ltd (a Singapore-owned Indian subsidiary) has taxable income of INR 40 lakh and book profits of INR 75 lakh.

• Regular tax (25% + 4% cess): INR 40 lakh x 26% = INR 10.40 lakh
• MAT (15% + 4% cess): INR 75 lakh x 15.6% = INR 11.70 lakh
• Tax payable: INR 11.70 lakh (MAT is higher)
• MAT credit generated: INR 11.70 - 10.40 = INR 1.30 lakh

Year 2 (FY 2025-26): Business grows. Taxable income rises to INR 80 lakh, book profits to INR 90 lakh.

• Regular tax: INR 80 lakh x 26% = INR 20.80 lakh
• MAT: INR 90 lakh x 15.6% = INR 14.04 lakh
• Regular tax exceeds MAT — company uses INR 1.30 lakh MAT credit from Year 1
• Net tax payable: INR 20.80 - 1.30 = INR 19.50 lakh

The credit vanishes if the company opts for Section 115BAA. With INR 1.30 lakh of accumulated MAT credit, that might be acceptable. But a company with INR 5 crore of accumulated MAT credit from years of SEZ operations should think twice before switching.

Which Regime Is Better for Foreign Subsidiaries?

Choose Section 115BAA (22% / 25.17% Effective) if:

• Your company is newly incorporated — you have no accumulated MAT credit or legacy deductions to lose
• You have no SEZ operations claiming Section 10AA exemptions
• Your R&D expenditure does not qualify for weighted deduction under Section 35
• You want predictable tax costs — no MAT calculations, no book profit adjustments, no credit tracking
• Your parent company wants simplified transfer pricing compliance — fewer deductions means simpler documentation
• You are a services company with limited capital investment (no benefit from additional depreciation)

Choose Regular Regime (with MAT Floor) if:

• You operate in a Special Economic Zone and claim Section 10AA profit exemption — this alone can save INR 2.5 crore+ on INR 10 crore of export profits
• You have significant R&D expenditure qualifying for weighted deduction under Section 35(2AB)
• You have accumulated MAT credit of INR 50 lakh or more that you plan to utilize within 15 years
• Your company claims additional depreciation on new plant and machinery (manufacturing companies investing heavily in capex)
• Your effective tax rate after all deductions falls below 22% — the regular regime with deductions beats 115BAA

Common Mistakes

• Opting for 115BAA without calculating the value of existing MAT credit. A company with INR 3 crore of accumulated MAT credit loses it permanently on switching. Run the 15-year utilization model first. If you can use the credit within 5-7 years, staying on the regular regime may save more than 115BAA's lower rate.
• Confusing MAT rate with effective tax rate. MAT is 15% on book profits, but with surcharge (7-12%) and 4% cess, the effective MAT rate ranges from 15.6% to 17.5%. Similarly, the 22% rate under 115BAA is actually 25.17% after surcharge and cess. Always compare effective rates, not headline rates.
• Assuming MAT applies to all companies. Companies that have opted for Section 115BAA or Section 115BAB (15% for new manufacturing companies incorporated on or after 1 October 2019 that commenced production by 31 March 2024 — the scheme is now closed to later entrants) are exempt from MAT entirely. Also, foreign companies (non-domestic) paying tax on a presumptive basis are exempt per Budget 2026 updates.
• Filing Form 10-IC after the ITR due date. The option to switch to Section 115BAA must be exercised by filing Form 10-IC before the due date of the income tax return (typically 31 October for companies requiring tax audit). Filing it late means you are stuck on the regular regime for that year — and the missed year's MAT calculation applies.
• Not modelling the break-even point. For a company with deductions worth INR 2 crore annually, the regular regime (25% on reduced income) may produce a lower effective rate than 115BAA (25.17% on full income). The crossover point depends on your specific deduction mix — run both calculations for 5 years forward before deciding.

Practical Example

StellarBridge GmbH, a German industrial automation company, incorporates a Private Limited subsidiary in India. The subsidiary will manufacture sensors at a factory in Pune (not an SEZ) with initial revenue of INR 50 crore and pre-tax profit of INR 8 crore.

Option A — Regular Regime with MAT:

• Taxable income after deductions (Section 32 depreciation of INR 2 crore, Section 35 R&D of INR 1 crore): INR 5 crore
• Regular tax: INR 5 crore x 26% = INR 1.30 crore
• Book profit (per P&L): INR 8 crore
• MAT: INR 8 crore x 15.6% = INR 1.25 crore
• Tax payable: INR 1.30 crore (regular tax is higher — no MAT credit generated)
• Effective rate on book profit: 16.25%

Option B — Section 115BAA:

• No additional depreciation, no weighted R&D deduction. Taxable income: INR 8 crore (approximately, after standard depreciation only)
• Tax: INR 8 crore x 25.17% = INR 2.01 crore
• Effective rate on book profit: 25.17%

Result: For StellarBridge, the regular regime saves INR 71 lakh annually because the R&D and depreciation deductions reduce taxable income significantly. But if the company had no R&D (say it was a pure trading company importing and distributing sensors), taxable income would roughly equal book profit, and 115BAA's 25.17% would beat the regular regime's 26-34.9% rate.

The rule of thumb: If your annual deductions and exemptions reduce taxable income by more than 15-20% relative to book profits, the regular regime (even with MAT as a floor) likely produces lower total tax over 5 years. If your deductions are minimal, Section 115BAA wins immediately.

Key Takeaways

• MAT at 15% (effective 15.6-17.5%) on book profits acts as a floor — you pay it whenever your regular tax falls below this amount.
• Section 115BAA offers 22% (effective 25.17%) with no MAT, no exemptions, and no going back once you opt in via Form 10-IC.
• New foreign subsidiaries without SEZ, R&D, or legacy deductions should almost always choose 115BAA — it is simpler and produces a predictable 25.17% rate.
• Existing companies with accumulated MAT credit should model the credit utilization timeline before switching — forfeiting INR 3-5 crore of credit is expensive.
• Section 115BAB (15% rate, effective 17.16%) applied to new manufacturing companies incorporated on or after 1 October 2019 — but the scheme has closed: production had to commence by 31 March 2024, so later entrants default to Section 115BAA's 22% rate.
• Always compare effective rates (after surcharge and cess), not headline rates. The difference between 22% and 25.17% catches many first-time filers off guard.

Choosing the right tax regime is one of the first decisions your Indian subsidiary makes — and one of the few that cannot be reversed. Beacon Filing's corporate tax filing team models both scenarios with your actual financials before you file Form 10-IC.