Why a Busy Professional Services Firm May Have Weak Margins

By Two Pillars & Co Advisory Group · Sources checked October 2026

What does it mean to be busy but not profitable?

In a professional services firm the product is time and expertise, so a busy calendar feels like proof of health. It is not. Profit is what remains after paying people and overhead, and it depends on four things that can each move independently of how busy the firm looks: how many of the available hours are actually billable, how much of the billable work is invoiced at the intended rate, how much of the invoiced amount is collected, and how the firm’s costs compare with the fees those hours earn. A firm can raise its hours worked by 10 percent and see no improvement in profit if the extra hours are written down, discounted, done under a fixed fee that was priced too low, or delivered late.

Benchmarking firms report that this is a common pattern. SPI Research’s 2025 Professional Services Maturity Benchmark described billable utilization falling to 68.9 percent, below the 75 percent level SPI treats as optimal, while EBITDA margins dropped to 9.8 percent, the lowest in over a decade.^[1] SPI’s revenue data point the same way: in its 2025 report, benchmarked firms’ revenue growth slowed to 4.6 percent year over year, from 7.8 percent in 2023.^[3] Busy firms are not automatically healthy firms; the gap between activity and profit is where this guide focuses.

Where does margin leak in a professional services firm?

Think of every hour as passing through six checkpoints, and measure what is lost at each one. The table lists the checkpoints, the question to ask at each and a benchmark where a credible source publishes one. The benchmarks come from SPI Research’s surveys of professional services organizations and from Clio’s law firm data; they are reference points rather than targets, and your own mix of services will differ.

Leakage and lockup deserve special attention because they hide inside accounts that look fine on the income statement. Deltek, summarizing the SPI report, defines revenue leakage as the gap between earned and realized revenue, often caused by missed billing, scope creep, write-offs or poor contract controls.^[2]

What do benchmarks say about firms like yours?

Benchmarks help you ask better questions, but they must be read carefully. SPI’s data come from the professional services organizations it benchmarks, so an accounting, law or engineering firm may see different norms. Clio’s figures describe law firms using its software and measure utilization against an eight-hour day, which is a different denominator from SPI’s share of available consultant time.^[6][2] The two are not interchangeable, and comparing a 42 percent law firm figure with a 66 percent consulting figure would mislead.

Three comparisons are still useful. First, compare your own trend to the benchmark trend: if your utilization has been flat while the benchmark slid, the problem may be market-wide demand rather than your execution. Second, compare your margin to your own recent history. Third, use the best-run firms as a direction, not a promise: Level 5 firms in the SPI maturity model held project overruns to single digits and reported project margins well above 50 percent, against an average of 37.7 percent.^[2]

How do you find where your firm’s margin goes?

Start with a twelve-month hours-to-cash walk. For each person, service line and client, build a table with seven numbers: hours available (after leave and holidays), hours worked, hours billable, hours invoiced, dollars invoiced, dollars written down, and dollars collected. Then compute utilization, realization and collection for each cut. Most firms discover that the average hides sharp differences: a few clients or service lines absorb far more effort than they pay for, and a few people carry most of the billable load.

Next, add costs. Take fully loaded labor cost for the hours worked on each client and compare it with the fees collected. This is the step that turns an hours report into a profitability analysis, and it often surprises leaders: the largest clients are not always the most profitable. A related guide in this series explains how to investigate unprofitable client relationships, and another covers realization and utilization in more detail.

Finally, look at the exceptions. List the ten largest write-downs, the ten projects with the biggest overruns against budget, and the invoices that took longest to collect. A small number of cases usually explains most of the leakage, and each has a concrete cause, such as a vague scope, a missing change order or a client who pays late, that can be fixed in a repeatable way.

Which fixes matter first?

Fix leakage and scope before chasing utilization. Recovering work that is already being done costs little, while pushing utilization higher raises burnout and quality risks. SPI cautions that utilization should be a foundation rather than a ceiling, and that leading firms are refining it to align with profitability and sustainability, for example by setting role-specific targets because senior staff spend time on leadership and business development.^[1] Where hours are billable, tighten the process from timekeeping to invoice; where work is fixed fee, tighten the estimate and the scope; where relationships are unprofitable, reprice, restructure or release them.

Pricing deserves its own review. If your fees have not kept pace with your costs, even a perfect operation earns less each year. A small, well-supported price increase can do more for margin than a large effort to find extra hours, which is why value pricing and fee-setting are covered in separate guides in this series.^[4]

What should leadership do in the next 30 days?

Choose one service line or one office and run the hours-to-cash walk on it first; a narrow, accurate analysis beats a broad, doubtful one. Agree on definitions for utilization, realization and leakage before collecting data, because different definitions are the most common reason internal numbers do not match benchmarks. Then set three measures to watch monthly, usually utilization, realization and lockup, and review them with the people who control them.

Frequently asked questions

What to do next

1. Pick one service line and run a twelve-month hours-to-cash walk.
2. Agree written definitions for utilization, realization and leakage.
3. List the ten largest write-downs and ten biggest project overruns and find their causes.
4. Review your prices against your cost increases over the last two years.