Service-business founders track revenue. Service-business operators track two different numbers:
Utilisation rate — what % of your billable team's hours are billable to a client this week? Healthy is 60-75%. Below 50% you're burning gross margin. Above 85% sustained means people are about to quit and quality is slipping. Track it weekly per person, not monthly aggregate; the aggregate hides the senior person stuck on internal work.
Cash days — how many days of operating expenses do you have in the bank, accounting for unpaid invoices? Service businesses get burned by Net-60 payment terms with no float. The rule: 60+ days of cash on hand, always. Below 30 days you're one slow-paying client from a payroll crisis.
The lever both of these expose: deposits. A 30-50% deposit on signature, paid before kick-off, transforms cash days without changing revenue. Most agencies don't ask for one because they don't want to lose the deal. They lose 10% of deals and gain 30+ days of float — almost always worth it.