Demerger vs Slump Sale: the Difference, Explained (2026)

Demerger vs slump sale: what is the difference? The short answer, for Indian corporate and tax purposes: a demerger is a court or tribunal approved separation of an undertaking into a different company, where the shareholders of the original company receive shares in the resulting company, and it is tax neutral if it meets strict conditions. A slump sale is the sale of an undertaking as a going concern for a single lump-sum price, without assigning values to individual assets and liabilities, and it is taxable as capital gains. Both move a business unit out of a company, but one is a reorganisation paid for in shares and the other is a sale paid for in money or other consideration. Getting the characterisation right decides the tax bill, so the two are often argued over. This article is general guidance, not legal advice, and it focuses on Indian law. Confirm the current statutory wording and any recent amendments with a qualified tax adviser before structuring a transaction. Last verified October 2026. ## Demerger, defined A demerger is defined in section 2(19AA) of the Income-tax Act, 1961. In outline, it is the transfer of one or more undertakings of a demerged company to a resulting company under a scheme of arrangement, where several conditions are met, including: - all the property and liabilities of the undertaking pass to the resulting company;

• they are transferred at their existing book values, ignoring revaluation;
• the resulting company issues its shares to the shareholders of the demerged company in consideration of the demerger; and
• shareholders holding not less than three-quarters in value of the shares in the demerged company become shareholders of the resulting company. Where these conditions are met, section 47(vib) and related provisions make the transfer tax neutral, so no capital gains tax arises on the transfer itself. Miss a condition and the tax neutrality can be lost, which is why demergers are drafted carefully. ## Slump sale, defined A slump sale is defined in section 2(42C) of the Income-tax Act, 1961 as the transfer of one or more undertakings as a result of a sale for a lump-sum consideration without values being assigned to the individual assets and liabilities. The tax is computed under section 50B. The gain is broadly the lump-sum consideration less the "net worth" of the undertaking, where net worth is the aggregate value of total assets less liabilities, calculated under the prescribed rules. A key point: a negative net worth increases the taxable gain, because you add it back rather than deduct it. ## Side-by-side comparison | Point | Demerger | Slump sale | |---|---|---| | Nature | Reorganisation under a scheme | Sale of a business undertaking | | Consideration | Shares of the resulting company to the demerged company's shareholders | Lump-sum price, usually cash, to the selling company | | Who receives value | The shareholders | The company selling the undertaking | | Values on individual assets | Transferred at book value | Not assigned to individual assets | | Approval | Court or tribunal approved scheme | Can be by agreement, no scheme needed | | Tax on transfer | Tax neutral if section 2(19AA) conditions are met | Capital gains under section 50B | | Governing definitions | Section 2(19AA), section 47(vib) | Section 2(42C), section 50B | ## Why the line is litigated Because a qualifying demerger is tax neutral and a slump sale is taxed, the characterisation can swing a large liability. A transaction that fails even one demerger condition, for example because shares are not issued to shareholders, can be recharacterised as a slump sale and taxed accordingly. Disputes have turned on exactly this, including cases where an undertaking had liabilities exceeding assets, so its net worth was negative, and the authorities argued the transfer was a taxable slump sale with the negative net worth added back. The lesson is practical: if you want the demerger treatment, meet every statutory condition and document it; do not assume the commercial intent will carry the day. ## Which route for which goal - Choose a demerger when the aim is to split a business and keep the same shareholders invested across the separated entities, for example to unlock value, separate different businesses, or prepare for a future listing, and when you can satisfy the section 2(19AA) conditions.
• Choose a slump sale when the aim is to actually sell a business unit to a buyer for a price, as a going concern, without valuing each asset separately. The two are not interchangeable: one keeps ownership within the existing shareholder base through shares, the other transfers the business out for consideration. ## Common mistakes to avoid - Assuming a transfer is a demerger when the share-issue or three-quarters shareholder condition is not met.
• Overlooking that a negative net worth increases, not reduces, the gain on a slump sale.
• Assigning values to individual assets in a deal meant to be a slump sale, which can break the definition.
• Ignoring stamp duty, GST and other taxes that can apply alongside the income-tax treatment.
• Treating foreign concepts of "demerger" or "spin-off" as identical to the Indian statutory definition. The rules vary by jurisdiction. ## Keeping a reorganisation's documents consistent A demerger or a slump sale throws off a scheme or business transfer agreement, valuation reports, and board and shareholder approvals that must all line up with the statutory definition you are relying on, and one clause describing the consideration the wrong way can put the intended tax treatment at risk. Modelling the reorganisation as linked clauses, so a change to the consideration or transfer mechanics surfaces wherever else it must match, is the kind of drafting, review and tracking that can live in one AI contract workspace tuned to your company. Adira is one workspace of that kind for reorganisation documents. This guide alone is enough to understand the difference and brief your advisers.