Vat or VAT may refer to:

  • A type of container such as a barrel, storage tank, or tub, often constructed of welded sheet stainless (corrosion resistant) steel, and used for holding, storing, and processing liquids such as milk, wine, and beer
  • Value added tax, a consumption tax levied on value added
  • Vanajan Autotehdas, a defunct heavy vehicle producer
  • Vát, a village in Hungary
  • Vatican Library, the library of the Vatican
  • Vat dyes, a type of water-insoluble dyes
  • VAT identification number
  • Vodka tonic, a mixed drink
  • Virtual Allocation Table, a component of the Universal Disk Format
  • A form of Việt-Võ-Đạo, the philosophy behind many Vietnamese martial arts