US Professional Services Profit Margin Benchmarks 2026: Agencies, Consultancies and A&E Firms

Three 2026 benchmark reports answer the question "what margin should a firm like mine earn?" in different ways. Promethean Research puts the average digital agency at a 13% after-tax net margin. SPI Research puts the average professional services firm at 9.9% EBITDA. Deltek's architecture and engineering study puts the average A&E firm at a 16.7% operating margin. Each number is right for its own sample. None measures the same thing.

That's why a single "average profit margin" figure does more harm than good in a board pack. This guide lines up current benchmarks side by side, explains what each counts, and shows how to place your firm on a like-for-like basis. It uses mostly U.S. and North American data where available. Two sources are global or mixed, and we note that where it matters.

The 2026 benchmarks side by side

Why different studies report different profit margins

These figures differ for three reasons.

Definitions come first. EBITDA adds back interest, taxes, depreciation, and amortization, so for the same firm it should run higher than an after-tax net margin. Operating margin on net revenue sits somewhere between the two and uses a different denominator. Comparing a 13% net margin to a 9.9% EBITDA figure and concluding that agencies outperform consultancies gets the arithmetic backward.

Firm size comes second. SPI's 509 firms employ more than 245,000 people, an average of about 480 per firm. Promethean's average agency has 31. Promethean's own data shows margin falling as headcount rises, from 19% for studios to 8% for agencies with 50 or more staff. Put those two facts together and SPI's lower headline figure is what you'd expect from bigger firms, not proof that professional services is a weaker business than agency work.

Owner pay is the third. In a nine-person studio, the owner's salary and the owner's profit blur together. Promethean's published findings don't say whether owner compensation is normalized, so the 19% studio figure may include money that a larger firm would book as salary. Check that before you measure yourself against it.

The A&E numbers show the same problem inside one industry. Deltek's 46th study reported a 21.4% operating margin, which it called a ten-year high. The 47th edition reports 16.7%, down from that peak. PSMJ's report, published in August 2026, calls its 20.5% median the highest in its survey's history. Two respected studies disagree on both the level and the direction of travel. The 3.8-point gap between 16.7% and 20.5% reflects more about sampling than the industry.

Agency Margins by size and focus

Promethean's 2025 data breaks the 13% average apart in ways that matter more than the average itself. All figures are after-tax net margin.

Margin drops by 11 points between the smallest and largest bands. The likely cause is that overhead, management layers, and bench time grow faster than billable revenue as headcount rises, though Promethean's findings don't test that. If you run a 30-person agency and measure yourself against the 13% headline, you're comparing yourself to a blend of studios and large shops. The 9% medium-agency figure is the fairer target.

Focus matters even more. Promethean reports that agencies that reduced their services grew 13% on average and posted 30% net margins, against 7.5% growth for the overall sample. That's a self-reported result from a small survey, and Promethean doesn't publish how many agencies are in that group. We'd read it as a strong signal that specialization pays, not as a promise that cutting services will more than double your margin.

One more finding from the same research stands out: Only 59% of agencies track project margins, and the average project margin is 35%. That leaves 41% flying without the figure that explains the gap between a busy quarter and a profitable one. Our agency profitability playbook covers where that money is lost in day-to-day operations.

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Consultancies and professional services firms

SPI's benchmark covers 2025 and reads like a warning. Average EBITDA held at 9.9%, barely changed from 9.8% in 2024 but well below the five-year average of 13.8%. Billable utilization fell to 66.4%, the lowest point in SPI's survey history. Project margin across all firms was 37.7%.

The top fifth of firms look different. Rocketlane reports that high-performing organizations averaged 14.5% EBITDA, 75.0% utilization, and a 45.1% project margin on time-and-materials work. That's 4.6 points more EBITDA on 8.6 points more utilization. The two numbers move together, though the data can't tell which drives the other.

SPI also puts revenue leakage at 4.5% of revenue, a five-year low. For a $5 million firm, 4.5% is about $225,000 a year in work delivered but not billed, which is why we treat revenue leakage as a margin problem before a sales problem. If you run a consulting practice, Magnetic's consulting-firm workflow shows how utilization and project margin sit side by side.

A&E firms report the highest margins in this comparison, and the definition helps explain why. Both Deltek and PSMJ measure operating profit on net revenue, which is total revenue less pass-through costs such as subconsultants and reimbursable expenses, the usual A&E convention. A smaller denominator raises the percentage. An engineering firm with a 16.7% operating margin on net revenue would show a lower figure if divided by gross revenue.

Deltek's 47th study also forecasts 9.5% net revenue growth and puts employee turnover at 13.8%. Those figures have a bigger impact on margin than they might seem at first. Turnover means rehiring and ramp-up time that never reaches a timesheet. If you manage an architecture or engineering practice, compare yourself to a range of roughly 16% to 21% and note which study and year you picked.

Where the margin goes between the project and the bottom line

The key takeaway from these sources lies in the gap between project margin and net margin. Promethean's agencies average a 35% project margin and a 13% net margin, a 22-point gap. SPI's firms average a 37.7% project margin and 9.9% EBITDA, a gap of about 28 points. The definitions differ, so treat the exact figures loosely. The pattern is consistent. Roughly 20% to 28% of project revenue is absorbed by overhead and other costs before it translates into profit for the firm.

That gap is overhead, bench time, unbilled work, and unrecovered scope. A project can look healthy on its own P&L and still leave the firm thin because people sit idle between projects, attend internal meetings, and absorb revisions nobody invoices. A live profitability dashboard lets you see that leak while a project runs, not after it closes.

We use four rules of thumb to decide where to look first. They're anchored to the benchmark figures above and aren't thresholds from the studies themselves.

The first two rows are staffing problems, and the third is a pricing problem. Treating a pricing problem as a resourcing problem, or vice versa, is the most common way firms see about 25% of potential profit disappear. Our guides on utilization versus realization rate and mastering billable hours show how to separate the two.

How to benchmark your own firm on the same basis

Comparing yourself to the wrong row is worse than not comparing at all. Here is the method we'd follow.

1. Pick the benchmark that matches your size and business. A 25-person agency compares to Promethean's medium band, a consultancy to SPI, an engineering practice to Deltek or PSMJ.
2. Recalculate your own margin on the same definition. That means after-tax net for Promethean, EBITDA for SPI, and operating profit on net revenue for A&E.
3. Pay every owner a market salary in the calculation, so a founder taking low pay doesn't flatter the result.
4. Use the trailing twelve months, not the last strong quarter.
5. Calculate project margin on fully loaded rates and utilization alongside the headline figure, because those two explain the gap.

Here's a hypothetical example to illustrate how this works: A 20-person agency bills $3 million a year. Its projects average a 35% margin, which is $1.05 million after direct delivery costs. Overhead and unbilled time take another 22% of revenue, $660,000. That leaves $390,000, a 13% net margin, right on the Promethean average. The same agency at a 30% project margin would fall to 8%, in line with the large-agency band. Five points of project margin is the whole difference between average and thin.

Finance teams that want this monthly instead of annually can run it from live project data. Our profitability calculator quickly shows where a single project lands, and the Finance Managers view shows the same numbers across the firm.

US cost factors that change the comparison

Two US-specific costs distort margin comparisons and are easy to miss. Employer payroll tax is one. Social Security alone costs employers 6.2% of each employee's wages up to $184,500 in 2026, before Medicare, benefits, and unemployment insurance. The other is worker classification, because moving work from employees to contractors changes both cost and billing. A firm outside the US will see a different loaded cost for the same salary, another reason to check where a benchmark's sample sits.

How to use benchmarks without being misled

Every figure here comes from a self-reported survey. Promethean's 119 responses are a small base, and it doesn't publish subgroup sizes. Surveys tend to draw firms that already track their numbers, so real averages may run lower than the published ones. That last point is our reading, not something the studies state.

Use ranges instead of single figures. Track your own trend before you chase anyone else's average. And when a competitor or a board member quotes a benchmark, ask three questions before you react: which definition, which size band, and which year.

What to do this week

Work out three numbers for your firm on a trailing twelve-month basis: average project margin, billable utilization, and net margin with a market-rate owner salary. Then place yourself in the right row of the tables above and use the four rules of thumb to see where to look first. If you'd like to see those three numbers update as projects run, book a demo and we'll walk through it with your own data.