Camilla and Wren are co-employees comparing their FICA taxes. Camilla makes $128,400 a year while Wren earns exactly twice as much at $256,800 a year. What are their effective FICA tax rates? Camilla 15.3\%; Wren 15.3\%. Camilla 7.65\%: Wren 4.55\%. Camilla 7.65\%; Wren 7.65%. Camilla 15.3\%: Wren 9.10\%