Gross Total Income

Gross Total Income (GTI) is the total of all incomes earned by a taxpayer under the five heads specified in the Income Tax Act, before any deductions under Chapter VI‑A are allowed. The five heads are Salary, House Property, Business/Profession, Capital Gains and Other Sources.

The GTI is the starting point for computing the Taxable Income. Once GTI is determined, the taxpayer can claim deductions such as Section 80C, 80D, etc., which reduce the amount on which tax is levied.

In the NISM exam, candidates are frequently asked to add up incomes from multiple sources, or to select the correct head for a given receipt. Mis‑identifying a head or forgetting to include a component leads to an incorrect GTI and a wrong answer.

• Remember: GTI = Sum of incomes under all five heads.
• Do not mix GTI with Net Taxable Income; the latter is GTI minus eligible deductions.

The Income Tax Act classifies income into five distinct heads. Each head has its own set of rules for valuation, exemptions, and set‑off against losses.

Salary includes basic wages, allowances, perquisites, and bonuses. House Property covers rental income from a property owned by the taxpayer, after allowing for standard deduction and interest on home loan. Business/Profession captures profit from trade, commerce, manufacturing or professional services after deducting allowable expenses.

Capital Gains arise from the transfer of capital assets such as shares, mutual funds, real estate, and are classified as short‑term or long‑term based on holding period. Other Sources is a residual head that captures income not covered elsewhere, e.g., interest on savings accounts, dividends, lottery winnings, and gifts.

For the exam, memorising typical items under each head helps you quickly allocate a given receipt to the correct category.

To compute GTI, list the income amounts under each head separately. Ensure that you have applied the correct valuation rules for each head before adding them together. For instance, rental income should already be reduced by the standard 30% deduction and interest on home loan, if claimed.

After the individual heads are correctly calculated, simply sum them using the formula above. No further adjustments are required at this stage; deductions such as Section 80C are applied only after GTI is finalized.

Exam questions often provide a mix of figures – some already net of exemptions, others gross. Read the stem carefully to know whether the amount needs further adjustment before inclusion in GTI.

Once GTI is determined, the taxpayer may claim deductions under Chapter VI‑A (e.g., Section 80C up to ₹1,50,000, Section 80D for health insurance, etc.). These deductions are subtracted from GTI to obtain the Taxable Income.

The formula for Taxable Income is: Taxable Income = GTI – Total Deductions. The amount of tax payable is then calculated on this reduced base using the applicable slab rates.

In the exam, a common mistake is to apply deductions before aggregating the heads, which leads to an understated GTI. Always follow the sequence: compute each head → sum to GTI → subtract deductions.

1. Omitting a head: Forgetting to include income from Other Sources such as interest or dividend leads to an incomplete GTI.

2. Double counting: Adding the same receipt under two heads (e.g., treating rental income as both Salary and House Property) inflates GTI.

3. Applying deductions early: As highlighted, deductions must be applied after GTI is computed.

4. Incorrect valuation: Using gross rental income without the 30% standard deduction or ignoring interest on home loan can misstate the House Property head.