Advanced Direct Tax Laws and Practice · Computation of Total Income, Tax Liability and Filing of Return of Companies

Computation of Total Income of a Company Under the Income-tax Act, 2025

Updated 11 October 2026 · Fact-checked

Computation of total income of a company means working out income under each head, adding clubbed income, setting off current-year and brought-forward losses within the allowed rules, and then subtracting the permitted deductions. The result is total income, on which tax is charged. In exams, follow this order and show the provision for every adjustment.

Understand Computation of Total Income of Companies

A company is taxed on its total income. You reach it in a fixed sequence. First, compute income under each head: salary (rare for a company), house property, business or profession, capital gains and other sources. Add the heads to get income before set-off.

Next, apply set-off of losses of the current year, then carry forward and set-off of earlier losses, as the Act permits. Add any income of others that is clubbed in the company's hands. The result is gross total income. From it you subtract the deductions that apply to a company. What remains is total income, rounded as the Act requires.

Loss rules need special care. A loss from a speculation business can be set off only against profit of another speculation business. Unabsorbed loss is carried forward to the following tax year and set off against speculation profit, for not more than four tax years after the year in which it was first computed (section 113).

A company that buys and sells shares of other companies is deemed to carry on speculation business to the extent of that activity (section 113(5)). The deeming does not apply if its gross total income consists mainly of house property, capital gains or other sources income, or if its principal business is trading in shares, banking or granting loans and advances (section 113(6)).

Special reorganisation rules can let a successor take over a predecessor's losses and unabsorbed depreciation, with conditions. Read the facts carefully for these cases, because the exam tests whether the conditions are met.

Key rules to remember

Computation sequence: Income under each head → set-off and carry forward of losses → add clubbed income → Gross Total Income → less deductions → Total Income; Use this as the skeleton of every answer. Show each head separately.
Speculation loss set-off: Speculation loss can be set off only against profits of another speculation business; It cannot be set off against any other income (section 113(1)).
Speculation loss carry forward: Carry forward to the following tax year; maximum four tax years immediately succeeding the year the loss was first computed; Set off only against speculation profit of those years (section 113(2) and (3)).
Deemed speculation for share dealing: Company dealing in shares of other companies is deemed to carry on speculation business to the extent of such purchase and sale; Exceptions: income mainly from house property, capital gains or other sources; or principal business is share trading, banking or granting loans and advances (section 113(5) and (6)).
Amalgamation of banks under section 117 (certain cases): Accumulated loss and unabsorbed depreciation of the amalgamating entity are deemed to be those of the amalgamated entity for the year the scheme came into force; If the scheme is in force on or after 1 April 2025, the loss can be carried forward for not more than eight tax years after the year it was first computed for the original predecessor. Accumulated loss excludes speculation loss.
Co-operative bank reorganisation under section 118: Demerger: loss directly relatable to the undertaking goes to the resulting bank; otherwise apportioned in the ratio of assets of the undertaking distributed; Conditions include three years of banking by the predecessor and holding at least three-fourths of book value of fixed assets for the stated periods (section 118(3)).

How to solve Computation of Total Income of Companies questions

Use the same order for every company computation question. It protects your marks even if one figure goes wrong.

1Read the facts and list each item of income, expense, loss and brought-forward balance. Note the tax year.
2Start from the profit as per the statement of profit and loss. Classify items under the correct head.
3Compute business income: add back disallowed items, deduct allowed items, and separate any speculation business.
4Compute house property, capital gains and other sources income separately.
5Apply set-off of current-year losses, then brought-forward losses, respecting the speculation loss restriction and the carry forward time limit.
6Add any clubbed income to reach gross total income.
7Deduct the deductions allowed to a company and arrive at total income.
8State the carry-forward balances at the end, with the year until which each can be carried.

Quickest way: Head-wise columns with a loss tracker

When to use it: Use it for long problems with many adjustments and several loss balances.

Draw a column per head and one small table for losses: loss type, amount, year first computed, last year available.
Mark any speculation item at once, because it never mixes with normal income.
Check the four-year limit for speculation loss by counting from the year after it arose.
Total each head, apply set-off, then deductions. Write the carry-forward balances last.

Common mistakes in Computation of Total Income of Companies

Setting off a speculation loss against business income or capital gains.
Students treat all business losses alike.
Fix: Remember section 113(1): speculation loss goes only against speculation profit.
Carrying forward speculation loss for more than four tax years.
Students confuse it with other loss periods.
Fix: Count four tax years immediately after the year the loss was first computed (section 113(3)).
Applying the deemed speculation rule to every company dealing in shares.
Students ignore the exceptions.
Fix: Check section 113(6): income mainly from house property, capital gains or other sources, or principal business of share trading, banking or lending, takes the company out of the deeming.
Including speculation loss in the accumulated loss taken over in a bank amalgamation under section 117.
Students assume all losses transfer.
Fix: Accumulated loss there covers business losses excluding speculation loss.
Skipping the conditions in reorganisation loss transfers.
Students memorise the benefit but not the conditions.
Fix: List each condition, such as the asset holding period and continuing the business, and test each against the facts. Failure makes the set-off deemed income (section 118(5) for co-operative banks).
Presenting only the final figure without head-wise workings.
Students rush.
Fix: Show workings per head and give the provision for each adjustment, since marks are given for method.

Worked examples

Example 1

X Ltd, a manufacturing company, has business profit (non-speculative) of ₹12,00,000 in the current tax year. It also has a speculation loss of ₹3,00,000 in the current year and speculation profit of ₹1,00,000 from a different speculation business in the same year. It has a brought-forward speculation loss of ₹1,50,000 from three tax years ago. Compute the effect on income and the carry forward.

Show the solution

Set off the current-year speculation loss of ₹3,00,000 against the speculation profit of ₹1,00,000 from another speculation business (section 113(1)). Remaining loss is ₹2,00,000.
The ₹2,00,000 cannot be set off against the ₹12,00,000 business profit. It is carried forward to the following tax year (section 113(2)).
The brought-forward loss of ₹1,50,000 arose three tax years ago, so it is within four succeeding tax years. It can only be set off against speculation profit, and the current speculation profit has been fully absorbed. It is carried forward if the four-year period has not ended.
Business income stays at ₹12,00,000 before other adjustments.

Answer: Normal business income is ₹12,00,000. Speculation income is nil. Speculation loss of ₹2,00,000 from the current year and ₹1,50,000 brought-forward (total ₹3,50,000) is carried forward, each within its four-year limit.

Example 2

Y Ltd, an Indian manufacturing company, sells shares of other companies during the year with a loss of ₹4,00,000. Its income is mainly from manufacturing. Its manufacturing business profit is ₹20,00,000. Is the share loss a speculation loss, and how is it treated?

Show the solution

Section 113(5): where part of a company's business consists of purchase and sale of shares of other companies, it is deemed to carry on speculation business to that extent.
Check section 113(6): gross total income is not mainly from house property, capital gains or other sources, and the principal business is not share trading, banking or lending. So the exception does not apply.
The ₹4,00,000 loss is therefore a speculation loss. It cannot be set off against the ₹20,00,000 manufacturing profit (section 113(1)).
It is carried forward to the following tax year, for set-off against speculation profit, up to four tax years after the year it arose (section 113(2) and (3)).

Answer: The ₹4,00,000 loss is a speculation loss. Business income remains ₹20,00,000. The loss is carried forward for up to four succeeding tax years against speculation profit only.

Exam tips

Always state the provision and apply its conditions to the facts before concluding.
Keep speculation items in a separate column from the start.
Write the last year until which each loss can be carried forward.
For reorganisation cases, tabulate each condition and mark met or not met, then state the consequence.
Use the official section numbers of the Income-tax Act, 2025 only where you are sure, otherwise describe the rule in words.

Practice questions from Computation of Total Income, Tax Liability and Filing of Return of Companies

Computation of Total Income of Companies in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Computation of Total Income of Companies: frequently asked questions

Can a company set off speculation loss against other business income?

No. A speculation loss can be set off only against profits of another speculation business (section 113(1)). The unabsorbed loss is carried forward for set-off against speculation profit only.

For how long can speculation loss be carried forward?

It can be carried forward to the following tax years, but not for more than four tax years immediately succeeding the year in which it was first computed (section 113(3)).

When is a company deemed to carry on speculation business by dealing in shares?

When part of its business is purchase and sale of shares of other companies, it is deemed to carry on speculation business to that extent. The deeming does not apply if its income is mainly from house property, capital gains or other sources, or its principal business is share trading, banking or lending (section 113(5) and (6)).

Are losses of an amalgamating bank carried forward in the amalgamated entity?

In the cases listed in section 117, accumulated loss and unabsorbed depreciation are deemed to be those of the amalgamated entity for the year the scheme came into force. Speculation loss is excluded from accumulated loss, and for schemes in force on or after 1 April 2025 the loss carry forward is limited to eight tax years from the year it was first computed for the original predecessor.