We study differential capital taxation-distinct rates on interest income and risky profits-in a continuous-time representative-agent general equilibrium model with complete markets, deriving closed-form expressions for the equilibrium risk-free rate and the market price of risk. A sharp separation result emerges: interest-income taxation scales the gross risk-free rate required to deliver a given after-tax return but leaves risk premia entirely unchanged, whereas profit taxation affects both equilibrium prices. Within the HARA family, the CRRA case delivers full neutrality of profit taxation with respect to both prices.