What is revenue per billable hour?

Revenue per billable hour calculates the average revenue generated for each hour of billable work, determined by dividing total revenue by total billable hours. This metric combines billing rate effectiveness with realization rate, showing actual revenue yield per hour invested in client work. For professional service firms, revenue per billable hour is a key indicator of pricing power and operational efficiency, typically ranging from $125 to $300+ per billable hour, depending on service type.

Key characteristics

• Calculated as: Total Revenue ÷ Total Billable Hours

• Combines billing rate and realization into a single metric

• Benchmark range: $125-$300+ depending on service type

• Higher values indicate better pricing or efficiency

• Should be tracked by service line, client type, and over time

• Improvement comes from better rates, realization, or mix shift

Why it matters for professional service firms

Revenue per billable hour cuts through complexity to show what each hour of work actually earns. A firm might have impressive billing rates but low revenue per hour due to excessive discounts, write-offs, or fixed-fee overruns. Conversely, a firm with moderate billing rates but excellent realization may achieve strong revenue per hour. This metric enables apples-to-apples comparison across projects, clients, and time periods, revealing where the firm extracts value efficiently and where improvements are needed.

Real-world example

Andrew's consulting firm tracked billing rates (averaging $185/hour) and utilization (74%), but not revenue per billable hour. Analysis revealed revenue per billable hour was only $148—significantly below the $185 nominal rate. The $37 gap came from: fixed-fee project overruns ($14/hour impact), routine discounting ($11/hour), and time write-offs ($12/hour). Andrew focused improvement efforts on these specific areas rather than raising billing rates. After 12 months: fixed-fee estimation improved, discount approval process implemented, write-off policy tightened. Revenue per billable hour enhanced to $171, adding $368K in annual revenue on similar billable hours.