Company dollar is money a brokerage makes after collecting fees and paying commissions.
Company dollar is calculated in two steps. Agent commissions are subtracted from total gross commission income. Then agent fees collected are added to that figure.
Company dollar is a good metric for assessing how much money a brokerage makes. Because gross commission income is paid to a brokerage, it counted as revenue. But if an agent split is incredibly high, the brokerage may not actually keep much of that revenue, if any. In fact, a brokerage may not make any money from commissions. Some simply charge monthly fees to agents. Company dollar accounts for this possibility.
From a planning standpoint, company dollar helps brokerages budget. A brokerage will try to make sure operating expenses are below the total company dollar. If operating expenses exceed the company dollar, then the brokerage will lose money.