Tax‑exempt income describes receipts that are not subject to income tax or, in some contexts, corporation tax, either because they fall outside the charge to tax or are expressly relieved from it. Legal practitioners use the term to distinguish such income from taxable income when advising on personal tax, corporate structuring, charities, investment products and cross‑border planning. In the UK (England & Wales, Scotland and Northern Ireland), the concept is reflected in various provisions of the Income Tax Acts and Corporation Tax Acts (for example, exemptions for certain savings income, ISA returns, some foreign income, and charitable exemptions), rather than in a single statutory definition. In Ireland, comparable exemptions are contained in the Taxes Consolidation Act 1997 and related legislation, including exemptions for specified investment income, certain social welfare payments and income of approved charities and pension schemes. Across all these jurisdictions, classification as tax‑exempt income depends on detailed statutory conditions and, in some areas, case law interpretation. Correctly identifying exempt income affects tax liability, reporting obligations, loss relief, means‑tested benefits and the design of tax‑efficient structures and transactions.