A support trust is a trust under which the trustees are obliged to apply income (and sometimes capital) to provide for a beneficiary’s maintenance and support, rather than having an entirely unfettered discretion whether to benefit them. In practice, it sits between a fixed-interest trust and a fully discretionary trust.In England and Wales, Northern Ireland and Ireland, “support trust” is a descriptive term rather than a statutory label; its content depends on the trust instrument and case law on trustees’ duties of maintenance, education and benefit. The beneficiary may have an enforceable right to be supported to a level judged reasonable by the trustees, taking into account their needs, resources and lifestyle.In Scots law, similar concepts arise under trusts for aliment, maintenance or support, again determined by the trust deed and general trust principles.Support trusts are commonly used in family settlements and for vulnerable or financially immature beneficiaries, balancing protection of capital with a degree of security for the beneficiary. They raise practical issues on trustees’ discretions, standard of living, interaction with means‑tested benefits, and potential variation or restructuring for tax and estate planning purposes.