The Ministry of Domestic Trade and Costs of Living (Malay: Kementerian Perdagangan Dalam Negeri dan Kos Sara Hidup), abbreviated KPDN, is a ministry of the Government of Malaysia that is responsible for domestic trade, living costs, co-operatives, consumerism, franchise and others.

The Ministry of Domestic Trade and Costs of Living is responsible for administration of several key Acts:[1] The Federal Constitution allows Parliament to make laws related to trade, commerce and industry that include: