Professional services

What utilization should you hit, and why does revenue leak between work and invoice?

In a services firm, every point of utilization and every unbilled hour lands on the margin. Most of the leak is invisible until the project closes.

June 20264 min read

The benchmarks worth measuring against

Healthy firms run billable utilization above roughly 70%, project margin above 35%, and revenue leakage below 5%, on the SPI Research maturity benchmark.

Utilization is billable hours over available hours. The gap between target and actual is the first place margin hides.

Leakage accrues quietly, mid-project

Revenue leakage is earned work that never gets billed: unrecorded hours, scope absorbed without a change order, staffing below the contracted rate.

It builds while the project is live and only shows up as a write-off at close, when it is too late to recover.

Where the ERP closes the loop

The lever is integration: real-time project margin appears where delivery meets the ledger. On Hudace, time capture, resourcing, and finance share one platform, so an overrun shows while there is still time to act, and realised revenue is visible against the standard value of the work.

Xenon AI forecasts estimate-to-complete and flags the projects trending over budget. A manager decides the response.

The numbers to watch

Set a baseline against the benchmark, then track the leak directly.

Billable utilization

Billable hours / available hours. Below roughly 70% and margin is leaking before any project even slips.

Project margin

(Project revenue - delivery cost) / project revenue. Healthy firms hold this above 35%.

Revenue leakage %

Earned work never billed, as a share of revenue. Controllable: mature firms keep it under 5%.

Realization rate

Revenue actually billed / standard value of time worked. Where rate erosion shows up.

See project margin on Hudace

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