TDA

TDA may refer to:

Finance

 * Tax deferred annuity, a type of retirement plan under IRC Section 403(b)
 * Time deposit account
 * TreasuryDirect account, an account used to buy securities from the US Treasury
 * "Treasury Direct Account," a fraud scheme promoted in the redemption movement

Organizations

 * Tautinio Darbo Apsaugos Batalionas, auxiliary police unit In Lithuania in 1941
 * Team Disney Anaheim, the administrative headquarters of the Disneyland Resort in California
 * Télédiffusion d'Algérie, an Algerian public service broadcasting and internet service provider
 * Texas Department of Agriculture
 * Thomas Deacon Academy, a city academy in Peterborough
 * Toa Domestic Airlines, later known as Japan Air System
 * Tournament Directors Association, an organization that works to standardize poker tournament rules worldwide
 * United States Trade and Development Agency
 * Training and Development Agency for Schools in the UK

Television

 * The Disney Afternoon, a two-hour television programming block
 * Total Drama Action, the second season of Total Drama

Other

 * TDA, ISO 639-3 code for the Gadal language
 * Taking and driving away, a term for auto theft under Scottish law
 * Tamm–Dancoff approximation, a method used in many-body theory
 * Temporary duty assignment, a United States Government employee travel assignment
 * Toluenediamine
 * Topological data analysis
 * Tornado detection algorithm, the replacement of the tornado vortex signature (TVS)
 * Traditional double action, a style of semi-automatic pistol action, also known as DA/SA