TCA may refer to:

In economics:

  • True cost accounting, a method of accounting which seeks to calculate the social, environmental, and economic costs and benefits of a product over its lifespan instead of focusing solely on the cost of its initial purchase.

In computing:

  • Trichromatic Colour Analyser, a software system that turns scanners into colorimeters

In chemistry:

  • Trichloroethane, one of two organochloride solvents
  • Trichloroacetic acid, chemical used to precipitate protein in serum
  • Taurocholic acid, a bile acid involved in the emulsification of fats
  • TCA, an abbreviation for tricyclic antidepressant, a class of anti-depressant drugs
  • 2,4,6-Trichloroanisole, a chemical compound which is the cause of cork taint in wine
  • TCA cycle, tricarboxylic acid cycle or citric acid cycle, a pathway in cellular metabolism
  • Theoretical Chemistry Accounts

In associations:

  • Television Critics Association
  • Thyroid Cancer Alliance
  • Total Community Action
  • Trans-Canada Air Lines
  • Taiwanese Cultural Association
  • Train Collectors Association
  • Transportes Carga AĆ©rea, a defunct Brazilian airline
  • Trinity Christian Academy (disambiguation)
  • Tobin Carlson and Associates

In other uses:

  • Advanced Telecommunications Computing Architecture, a specification set for carrier grade communications equipment
  • Terminal Control Area, a volume of controlled airspace
  • Teen Choice Awards
  • The Competition Authority (Ireland)
  • Total cost of acquisition
  • The Canadian Amateur, a magazine for amateur radio enthusiasts
  • Transport Construction Authority, a former agency of the Government of New South Wales with responsibility for new railway projects in the city of Sydney, Australia.