HEMS—an acronym for Health, Education, Maintenance, and Support—is a widely used distribution standard in trusts that guides when and how a trustee may provide assets to a beneficiary. Recognized under federal tax law as an ascertainable standard, HEMS limits distributions to clearly defined categories, preventing estate-tax inclusion when a beneficiary also serves as trustee. This standard ensures beneficiaries receive what is necessary for their well-being—such as medical expenses, tuition, housing, and reasonable living costs—while still imposing meaningful boundaries on spending. Importantly, a HEMS standard also provides creditor protection: because the beneficiary cannot compel distributions beyond these defined purposes, creditors generally cannot force access to trust assets.