Marketing agency profit margins: the real 2025 numbers, and why margin falls as you hire

The average digital agency kept 13% of its revenue as after-tax profit in 2025. Small agencies kept more. Studios with fewer than 10 full-time employees averaged 19%, and agencies with 50 or more full-time employees averaged 8%.

Those numbers come from Promethean Research, which has tracked the digital agency industry since 2015. This guide walks through the 2025 figures, why margin drops as an agency hires, where the money goes, and what AI is doing to prices and to the work. It ends with steps an owner can take this quarter.

The 2025 numbers

Promethean’s 2026 survey had 119 completed responses from digital agency owners and managers, mostly in North America. The average agency in the sample had 31 employees and $4.43 million in revenue. The figures are averages of what owners reported.

Here is the 2025 average after-tax net margin by agency size.

Agency size	Full-time staff	Average after-tax net margin, 2025
Studio	0 to 9	19%
Small	10 to 24	12%
Medium	25 to 49	9%
Large	50 or more	8%
All agencies		13%

The overall average slipped from 14% in 2024. Promethean puts the long-run average at about 15% since 2015.

Margin also varies by the kind of work. In 2025, design agencies averaged 18%. Marketing agencies and blended agencies both averaged 13%. Development agencies averaged 11%.

Two cautions apply to the table. First, these are digital agencies, which include web, design and development shops as well as marketing shops. We did not find a public survey of the same quality that covers only small marketing agencies. Second, owners often take part of their pay as profit instead of salary. In Promethean’s 2022 salary survey, owners took an average of $242,000, and about half of it came as dividends, withdrawals, bonuses and other cash. How an owner books that pay can move a small agency’s reported margin.

Why margin falls as an agency hires

Many agencies grow the same way. They win a client, and then they hire people to serve it. Promethean explains the pattern this way. Growth adds revenue, and it also adds management layers, support roles, coordination, reporting, recruiting and internal systems. Unless revenue per employee and pricing rise at the same pace, margin goes down.

A studio has fewer managers and support roles, and the owner often sells and delivers the work. That keeps costs low. The same owner is also the constraint. Promethean notes that many studios depend heavily on one or two owners to sell, manage clients, make the calls and protect quality.

Turnover makes the hiring cost worse. Average blended staff turnover at digital agencies was 19% in 2025, down from 23% in 2024. That means about one in five people left in a year. Gallup estimates that replacing an employee costs from one-half to two times that person’s annual salary. That article is about U.S. businesses in general. When a person leaves, the training you gave them leaves too.

Agencies are already hiring less. Average employee growth was negative for the second year in a row, at minus 2%. Studios cut headcount by an average of 7%.

Where the money goes

People are the largest cost by far. In its 2023 industry report, Promethean described the current standard split for a digital shop like this:

• About 55% of revenue goes to cost of goods sold, which is almost all salaries and benefits.
• About 25% to 30% goes to operating expenses.
• About 17% is left as pre-tax net income.

Promethean presents this as a standard split. It is a benchmark and it is not a survey average. The older guideline for digital agencies was 25% to 35% pre-tax profit. Promethean says salary pressure had a slightly greater impact than pricing pressure, and that growing competition also played a role. Between 2019 and 2022, salaries for most positions rose 25% to 35%.

Tools are small by comparison. In Promethean’s 2023 tools survey, the average agency spent 3.7% of revenue on apps and tools, not counting pass-through costs.

Unbilled time is the quiet cost. Promethean found that the average agency employee is expected to bill 25 hours a week and spend another 13 hours on work that is not billed. Billable time is about two-thirds of that 38-hour week.

Scope creep adds to it. In a 2025 survey of 273 U.S. agency managers and executives by Ignition, a billing software company, 57% of agencies said they lose $1,000 to $5,000 a month to unbilled work. Another 30% said scope creep costs them more than $5,000 a month. And 78% said they rarely or only sometimes charge for out-of-scope work. Ignition sells to agencies, so treat these figures as a rough guide.

What AI is doing to prices

Some clients want a lower price because of AI.

The Society of Digital Agencies (SoDA) surveyed 251 agency leaders in the fourth quarter of 2025. In that survey:

• 39% said clients already expect lower prices because of AI.
• 55% said pricing pressure from clients is a growing challenge.
• 43% said their profit margins are shrinking.
• 84% said demands for faster turnaround are a growing challenge, and 45% said AI has intensified that demand.

In a 2025 survey of more than 180 agencies by Productive, an agency software company, about a third said a client had already asked for an “AI discount.” Nearly half expected the question to come.

Fewer marketers expect to increase agency budgets. In Forrester’s 2026 survey of B2B brand and communications marketers, the share expecting to raise overall agency budgets fell 13 percentage points from 2025. For digital marketing, the share expecting to spend more with agencies fell from 51% to 31%.

Hourly billing makes this worse. Promethean puts the risk plainly: “Clients will ask why the work still costs the same if it takes less time.”

Here is a hypothetical example to show the math. Say a monthly report took 12 hours at $150 an hour, so the fee was $1,800. With AI, it now takes 4 hours. If you still bill by the hour, the fee drops to $600. You lost two-thirds of the revenue on that task, and the client got all of the saving. If you price the report as a deliverable, the fee can stay near $1,800, and the saved hours become margin or capacity.

What AI is doing to the work

AI helps most on some tasks and hurts on others. The strongest evidence comes from controlled trials.

In a preregistered experiment with 758 Boston Consulting Group consultants, people using GPT-4 on tasks inside the tool’s abilities completed 12.2% more tasks and finished 25.1% faster, with better quality. On a task chosen to fall outside those abilities, the people using AI were about 19 percentage points less likely to get it right. The paper was published in Organization Science in 2026.

A second trial is closer to how a small agency works. Researchers ran a randomized study with 776 professionals at Procter & Gamble. People working alone with AI matched the performance of two-person teams working without it.

The lesson for an owner is simple. AI can let one skilled person do more. It still needs a skilled person to check the work, because the mistakes are hard to spot.

Most agencies are already using it. In the SoDA survey, 81% of agencies used AI for creative ideation, and 76% used it to automate or speed up routine tasks. In Promethean’s survey, 34% of agencies had put AI in place across the business, and another 28% were doing so.

What an owner can do about it

Owners control many of the things that drive margin. These seven steps come straight from the numbers above.

1. Know your margin by client. Track revenue and delivery cost for each account. In Promethean’s 2026 survey, only 59% of agencies tracked margins on individual projects. Among those that did, the average project margin was 35%.
2. Charge for scope. Write down what is in scope and bill for what is not. The Ignition figures suggest many agencies give away thousands of dollars a month.
3. Price the result instead of the hours. Sell a deliverable, a retainer with a defined output, or an outcome. When AI saves time, you keep the saving.
4. Narrow what you sell. Promethean found that agencies that reduced their services grew 13% on average and posted 30% net margins in 2025. Fewer services make the work more repeatable.
5. Move repeatable work to AI agents trained on your craft. Start with drafts, research, reports and routine updates. Train the agents on your briefs, your past work and your edits.
6. Keep a review step. You or your best person approves anything that goes to a client. The research shows why. AI is strong inside its reach and weaker outside it.
7. Hire for talent instead of hours. Add a person when that person adds judgment, a client relationship or a skill the agents cannot supply.

How to run a one-person agency with AI agents walks through steps 5 to 7 in detail.

A quick margin check

Use this list once a month.

• I know last month’s net margin for the whole agency.
• I know which three clients earn the most margin and which three earn the least.
• I know how many hours went to unbilled work.
• Every fee I quote is tied to a result or a deliverable.
• Every piece of work an AI agent drafts gets a named reviewer.
• My last hire, or my next one, adds something the agents cannot.

If you want help working through these numbers on your own agency, Marketer of One offers Consult at $400 an hour with a 5-hour minimum, and Build from $15,000 a month with a dedicated team on call 24/7.