Computation of Income
Computation of income refers to the process of calculating a taxpayer’s total taxable income as per the provisions of the Income Tax Act.
It’s not just adding up what you earn. It’s about classifying income correctly, adjusting it as per tax rules, and arriving at the figure on which tax is actually payable.
How Income is Computed
Income is calculated under five specific heads:
1. Income from Salary
Covers wages, bonuses, allowances, and perquisites received from employment.
2. Income from House Property
Rental income from property, after standard deductions and interest on home loan.
3. Profits and Gains from Business or Profession
Income earned from business activities or professional services, after allowable expenses.
4. Capital Gains
Profit from sale of assets like property, shares, or mutual funds.
5. Income from Other Sources
Residual category—interest income, dividends, gifts, etc.
The Step-by-Step Flow
Here’s what actually happens in computation:
- Identify and classify income under the correct heads
- Compute income under each head as per specific provisions
- Adjust losses (intra-head and inter-head set-off)
- Add all heads to arrive at Gross Total Income (GTI)
- Claim deductions (like Section 80C, 80D, etc.)
- Arrive at Total Income, which is taxable
What This Really Means
Two people earning the same amount can end up paying very different taxes.
Why? Because computation depends on:
- Nature of income
- Available deductions
- Loss adjustments
- Compliance with tax provisions
Common Mistakes in Computation
- Treating all income as one lump sum
- Missing out on eligible deductions
- Incorrect classification (e.g., capital vs business income)
- Ignoring set-off of losses
- Not considering exemptions properly
Key Point to Remember
Computation of income is not accounting—it’s a tax-specific calculation.
It follows legal provisions, not just financial statements.
