For a parent of a son or daughter with a significant disability, the will is the hardest document of their life: provision must continue after the parent cannot, and the obvious instrument, a direct gift, can be exactly wrong, overwhelming the beneficiary's capacity to manage it and interacting badly with the supports their life is built on. The standard answer of Irish practice is the discretionary will trust, and it deserves to be understood properly rather than adopted as a formula.
Why discretion protects
Under a discretionary trust the vulnerable beneficiary owns nothing outright: trustees hold the fund with power to apply income and capital for their benefit as needs arise, alongside, typically, other family beneficiaries to give the discretion reality. The structure means there is no asset in the beneficiary's hands to be mismanaged or exploited, and it is the flexibility, trustees responding to needs across decades, that does the providing. How trust distributions interact with a beneficiary's entitlements and supports, and the particular tax treatment of trusts of this kind, are matters on which specialist tax advice should be obtained at the drafting stage, because the details matter and change.
Building the trust that works
The drafting choices are practical before they are legal: trustees chosen for judgement and longevity, siblings plus a professional is a common architecture, with succession of trustees provided for; a letter of wishes, updated through life, telling the trustees what providing well looks like for this person, routines, carers, the house, the things that constitute their security; powers wide enough to buy or adapt housing and fund care; and a remainder destination for what is unspent. The letter of wishes is not legally binding and is, in practice, the most consulted document in the file.
The decades of trusteeship
These trusts run for lifetimes, and the administration is where they succeed or fail: decisions documented, accounts kept, reviews held as needs and supports change, advice taken at the points that matter. Trustees who inherit the role, the siblings now holding for a brother or sister, are carrying their parents' promise, and structured professional support, periodic review rather than crisis consultation, is what keeps the carrying sustainable. This is trust and estate practice in its most exact sense, and it is work this practice, TEP-led, regards as central rather than peripheral.
This article is general information, not legal advice. For the full practice area, see Trusts in Wills and Estates, or contact the practice to discuss a matter in confidence.