If you put in the inductor series resistance, and the rest of the circuit components corresponds to the circuit to be built, then the simulation should give a reasonable estimate of the circuit efficiency.
Just measure the power (VA) into the circuit and subtract the power (VA) delivered to the load. The difference is from all the losses.
LTspice allows you to display the power dissipated in any part by ALT-Left Clicking the part. Don't know if Hspice has a similar ability.