Explain the difference between: (i) a private limited company and partnership; (ii) co-ownership and partnership; (iii) joint Hindu family business and partnership.

All three comparisons trace back to the same conceptual root: Section 4 of the Indian Partnership Act, 1932 requires an agreement between persons to carry on business and share its profits through mutual agency, and wherever any of these three elements is absent — separate legal personality in the case of companies, a "business" in the case of co-ownership, or a genuine contract in the case of the joint Hindu family — the relationship falls outside partnership altogether.

(i) Private Limited Company and Partnership

The company differs from the firm principally because it possesses a separate legal personality distinct from its members, whereas a firm is, in the words of the commentary, "merely a collective name for the individuals who have entered into partnership," possessing no independent legal existence of its own.

The Supreme Court's reasoning in Rashiklal & Co. v. CIT — that "a firm" as such cannot enter into partnership because Section 4 contemplates only individual persons — illustrates why partnerships lack the corporate capacity that companies enjoy as a matter of course. A useful illustration from the commentary shows this concretely: if A, B and C are partners in X & Co. and D, E and F are partners in Y & Co., and the two firms combine into Z & Co., the law treats the partners of Z & Co. as being A, B, C, D, E and F individually, not the two firms as such; consequently, absent contrary agreement, the death of any one of these six persons dissolves the combined firm — a consequence no company would ever suffer on a shareholder's death, precisely because its personality survives independently of its members.

(ii) Co-ownership and Partnership

Co-ownership and partnership are frequently confused because both may involve joint holding of property and shared benefit from it, but Section 6, Explanation 1 of the Act makes clear that the sharing of profits or gross returns arising from property jointly held does not, by itself, create a partnership.

The commentary explains the conceptual difference sharply: co-ownership is merely the joint holding of property, whereas partnership requires the carrying on of a business. Two illustrations, drawn from Illustrations (a) and (b) to Section 239 of the old Indian Contract Act (analogous to the present Section 4), demonstrate the line precisely. Where A and B jointly purchase 100 bales of cotton and agree to sell them for their joint account, they are partners in respect of that cotton, because a business — buying to resell for shared profit — is genuinely being carried on. But where A and B jointly purchase the same 100 bales of cotton merely agreeing to divide the cotton between themselves, they are not partners at all, since no business is being carried on; they are simply co-owners dividing property.

The English Partnership Act, 1890, Section 21, similarly enacts that joint tenancy, tenancy in common, joint property, common property, or part ownership does not of itself create a partnership as to anything so held or owned, and the commentary treats this as consistent with Indian law. A concrete Indian illustration reinforces the point: where a group of co-owners simply collected rents from properties gifted to them jointly, it was held in Ibrahim Shah Mohd v. Noor Ahmed that collecting rent of this passive kind was not a business, and the co-owners were accordingly not partners. However, the same commentary notes that if co-owners of a house go further and actually carry on a business with respect to that property — for instance, running it as a hotel for profit — they become partners with respect to that particular business, even though they remain mere co-owners of the underlying property itself.

(iii) Joint Hindu Family Business and Partnership

Section 5 states directly that the relation of partnership arises from contract and not from status, and expressly excludes members of a Hindu undivided family carrying on family business as such from being treated as partners in that business.

The Privy Council's ruling in Pichappa Chettiar v. Chockalingam Chettiar, later followed by the Madras High Court in Gangayya v. Venkatramiah, is illustrative: where the karta of a joint family entered into a partnership contract with an outside party, the other family members were held not to have become partners in that firm, because they had never personally agreed to anything — their rights in the family business continued to rest on birth-status alone, wholly untouched by the karta's separate contractual dealings. This illustration, together with the Bombay High Court's rulings in Sakrabhai v. Maganlal and Samalbhai v. Someshwar on liability and accounting respectively, captures the essential truth running through all three comparisons: wherever genuine contract, business, and mutual agency are all present, partnership arises; wherever any one is missing — corporate personality substitutes contract in the company, passive property-holding substitutes business in co-ownership, or birth-status substitutes agreement in the joint family — the relationship, however similar it may appear on the surface, is legally something quite different.