Tetrabromoauric acid is an inorganic compound with the formula . It is the bromide analog of chloroauric acid. It is generated analogously, by reacting a mixture of hydrobromic and nitric acids with elemental gold. The oxidation state of gold in  and  anion is +3. The salts of  (tetrabromoauric(III) acid) are tetrabromoaurates(III), containing  anions (tetrabromoaurate(III) anions), which have square planar molecular geometry.