Most firm growth goals are a revenue number, and a revenue number is the wrong primary goal — because revenue can grow while the firm gets worse.
A practice can add fifteen percent to the top line by accepting work it should have declined, at prices set years ago, staffed by people who then leave. That firm grew and is in a worse position than it started: more hours, thinner margin, weaker client base, and a hiring problem.
So the useful planning question is ...