The St. Kitts & Nevis Cabinet is comprised of the Prime Minister, other ministers and the Attorney-General. Cabinet ministers are appointed by the Governor-General on the advice of the Prime Minister, from among members of the National Assembly. They control the departments of government and implement, administer and enforce the laws made by Parliament. Cabinet members must stand together on government policy -- a minister who is not willing to do so must resign. Nevis has its own legislature, however the central government is responsible for overall policy formation.

Every department of the government of St Kitts and Nevis is under the supervision of a permanent secretary whose office is a public office. There also exists a secretary to the Cabinet whose office is a public office and whose roles include arranging the business for, and keeping the minutes of, the Cabinet and conveying the decisions of the Cabinet to appropriate persons and authorities.