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The title compound, C9H9BrN2O2, crystallizes with two independent but essentially identical molecules in the asymmetric unit. Each molecule adopts a trans configuration with respect to the C=N bond. In one of the molecules, the dihedral angle between the benzene ring and the hydrazinecarboxylic acid plane is 24.9 (2)°, and that in the other molecule is 16.1 (2)°. The molecules are linked into a three-dimensional network via intermolecular N—H...O, C—H...O, C—H...N and C—H...Br hydrogen bonds. An intramolecular N—H...O hydrogen bond is also present.