Taxation in India is governed by the Income Tax Act, 1961, which specifies the manner in which total income is computed, deductions are allowed, tax is levied, and reliefs are provided. While the basic tax liability is calculated using slab rates, the computation is not complete without considering additional components such as surcharge, marginal relief, deductions, rebates, and reliefs. These provisions ensure fairness in taxation and prevent undue hardship to taxpayers.
Basic Tax Liability:
Tax calculation begins with determining the Gross Total Income (GTI), which is the sum of income under five heads:
-
Income from Salaries
-
Income from House Property
-
Profits and Gains of Business or Profession
-
Capital Gains
-
Income from Other Sources
From this, eligible deductions under Chapter VI-A (Sections 80C to 80U) are subtracted to arrive at the Total Income. Tax is then computed on this total income as per the applicable slab rates.
Surcharge on Income Tax:
A surcharge is an additional tax levied on the income tax amount (not on income directly). It applies to individuals, HUFs, firms, and companies with higher incomes. The purpose is to impose a higher burden on taxpayers with greater ability to pay.
For Individuals (AY 2025–26), surcharge rates are:
-
10% of income tax if total income exceeds ₹50 lakh but does not exceed ₹1 crore.
-
15% of income tax if income exceeds ₹1 crore but does not exceed ₹2 crore.
-
25% of income tax if income exceeds ₹2 crore but does not exceed ₹5 crore.
-
37% of income tax if income exceeds ₹5 crore (not applicable to income under capital gains u/s 111A, 112, 112A, and dividend income, where max surcharge is capped at 15%).
Thus, surcharge ensures progressive taxation, but without checks it can lead to excessive burden, which brings us to marginal relief.
Marginal Relief:
Marginal Relief is a provision to ensure that when surcharge is levied, the additional tax payable does not exceed the amount of income that goes beyond the threshold. In simple terms, it prevents a situation where earning even ₹1 more pushes the taxpayer into paying significantly higher taxes.
For example:
-
Suppose a taxpayer has an income of ₹50,00,100 (just ₹100 above ₹50 lakh).
-
Without marginal relief, surcharge @10% would apply on the tax liability, resulting in a much higher tax compared to someone earning exactly ₹50 lakh.
-
With marginal relief, the extra tax payable is restricted to the actual income exceeding the threshold (₹100 in this case).
This ensures fairness and prevents inequitable jumps in tax burden.
Deductions (Chapter VI-A):
Deductions play a significant role in reducing taxable income. Some major deductions:
-
Section 80C: Deduction up to ₹1.5 lakh for investments in PPF, NSC, ELSS, LIC premiums, tuition fees, etc.
-
Section 80D: Deduction for health insurance premiums (up to ₹25,000 for self and family; ₹50,000 for senior citizens).
-
Section 80E: Deduction for interest on education loans (no monetary limit, max 8 years).
-
Section 80G: Deduction for donations to charitable institutions (50% or 100% depending on notified institutions).
-
Section 80TTA/80TTB: Deduction for interest on savings bank accounts (₹10,000 for individuals; ₹50,000 for senior citizens under 80TTB).
-
Section 80U: Deduction for disabled persons (₹75,000 for general disability, ₹1,25,000 for severe disability).
These deductions incentivize savings, social security, and welfare-related expenditures while lowering taxable income.
Rebate under Section 87A:
A rebate directly reduces tax liability, unlike deductions which reduce taxable income. Under Section 87A (AY 2025–26), the rebate is available to resident individuals with income up to specified limits:
-
Under the old tax regime, full rebate up to ₹12,500 is allowed if taxable income does not exceed ₹5 lakh. Effectively, no tax is payable if income ≤ ₹5 lakh.
-
Under the new tax regime, a higher rebate of up to ₹25,000 is available if taxable income does not exceed ₹7 lakh. Thus, taxpayers under the new regime pay no tax if income ≤ ₹7 lakh.
The rebate is applied before adding surcharge and cess, and it provides significant relief to low- and middle-income taxpayers.
Relief under Section 89 (Arrears of Salary):
At times, taxpayers receive arrears or advance salary that pushes them into a higher tax bracket in the year of receipt, increasing tax liability unfairly. To address this, relief under Section 89 is provided.
The computation involves:
-
Calculating tax payable on total income including arrears.
-
Calculating tax payable on total income excluding arrears.
-
Finding the difference between the two.
-
Separately, computing the tax for the year(s) to which arrears relate, both with and without arrears, and finding the difference.
-
Relief = Excess tax in year of receipt – Excess tax in year(s) to which arrears belong.
This ensures that arrears are taxed as if they had been received in the correct year, preventing extra burden.
Relief for Double Taxation (Section 90 & 91):
If income is taxed in India and abroad, relief from double taxation is available:
-
Section 90: Relief under Double Taxation Avoidance Agreements (DTAA) between India and another country.
-
Section 91: Unilateral relief if no DTAA exists.
Relief is generally given by allowing a credit of tax paid in the foreign country against Indian tax liability on the same income.
Health and Education Cess:
After adding tax, surcharge (if any), and applying rebate/relief, a Health and Education Cess @4% is levied on the total tax payable. This cess is earmarked for funding health and education initiatives.
Step-by-Step Illustration of Tax Calculation
Let’s take an example (old regime):
-
Total Income: ₹52,00,000
-
Tax on ₹52,00,000: As per slab rates = ₹13,62,500
-
Surcharge @10% (since income > ₹50 lakh but ≤ ₹1 crore) = ₹1,36,250
-
Total Tax before Cess = ₹14,98,750
-
Health & Education Cess (4%) = ₹59,950
-
Final Tax Liability = ₹15,58,700
If the tax at ₹52,00,000 is more than the tax at ₹50,00,000 plus the excess income (₹2,00,000), marginal relief will apply to restrict excess tax.
One thought on “Tax Calculation including Surcharge and Marginal relief, Deduction, Rebate, Relief”