Earnings Power
  
The general goal of for-profit companies is to make money (that's spelled out in the phrase "for-profit"). The extent to which the company can use its business to generate profits is known as its earnings power. The more money a company can potentially make, the higher its earnings power.
Earnings power gets contextualized as well. Like...the potential earnings of a company seeking to "own" the telecommunications industry is massive. The similarly dominant company seeking to "own" the toilet-flushing handle industry...delivers not so massive earnings power.
The phrase gets used with people as well. A neurosurgeon generally has higher earning power than a professional lacrosse player. In fact, we might start a dating service: earningspowerxoxo.com...boil the process down to a single statistic.