Mutuality principle excludes member-derived receipts from tax; only external investment income remains taxable in a genuine mutual fund.

Receipts of a genuine mutual undertaking from its own members are not taxable income because contributors to the common fund and participators in the surplus are substantially identical. Applying the principle that taxable income must arise from outside and not from dealings with oneself, receipts from members' subscriptions, loans and overdue payments were treated as internal accretions of the mutual body. Only income from external investments was recognised as taxable; the receipts in dispute, being derived from within the mutual fund, were not liable to income-tax and the reference was answered in favour of the assessee.

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Issues: Whether the receipts earned by a mutual fund from its own members and share-holders were assessable to income-tax as income.

Analysis: The Fund was treated as a mutual undertaking in which the contributors to the common fund and the participators in the surplus were substantially identical. Applying the principle that taxable income must come in from outside and not arise from transactions with oneself, the receipts generated from the members' subscriptions, loans and overdue payments were held to be internal accretions of the mutual body. Only income earned from outside investments was conceded to be taxable, but the controversy related to receipts from members.

Conclusion: The receipts arising from within the mutual fund were not liable to income-tax and the reference was answered in favour of the assessee.

Ratio Decidendi: In a genuine mutual undertaking, surplus arising from dealings with its own members is not taxable income because a body cannot make profit out of itself; only receipts from external sources constitute taxable income.

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