What is project margin?

Project margin measures how profitable a specific project is by comparing the revenue earned to the direct costs of delivery. It is calculated by subtracting direct project costs from project revenue, then dividing by project revenue and expressing the result as a percentage. A project that earns $20,000 in revenue with $12,000 in direct costs has a 40% project margin. Direct costs include the fully loaded cost of team members' time (salaries, benefits, and taxes prorated by hours worked), any freelancer or contractor fees, software or tools purchased specifically for the project, stock assets, printing costs, and any other expenses directly tied to delivery. Overhead costs like rent, admin staff, and general software subscriptions are typically excluded from project margin calculations and instead covered by the aggregate margin across all projects. Promethean Research reports an average project margin of 35% among digital agencies that track it (2025 data), and only 59% of agencies track project margins at all. Margins vary by service type and billing model, so compare each project with your own average for that service. The key is understanding your target margin by service type and tracking actual performance against it. Project margin analysis becomes powerful when you compare across dimensions. Which service types deliver the highest margins? Which clients consistently produce above-average margins? Which team members are most efficient? Are margins improving or declining over time? These patterns inform pricing adjustments, service portfolio decisions, resource allocation, and client selection strategy. Agencies that track project margins rigorously are far better equipped to make profitable business decisions than those that only look at top-line revenue.