How do you actually track job profitability (not just revenue)?

Tackling it on my own for now — trying to figure out how much of this is a real unmet gap vs. something people have already solved well enough with Job Costing + QBO. Really appreciate the point about QBO being the better source for payroll burden and workers' comp — that's exactly the kind of thing that's easy to miss if you're just doing hourly rate x hours.