Think about the client planning meetings most agencies hold every fall. Every client on the roster has a plan for the next year, with goals, channels, a budget, and a way to measure what’s working and what isn’t. The team built those plans with great care based on research, insight, and creativity because that is what clients pay for.

Now think about your agency’s own plan for next year. Unfortunately, what often happens is that growth is relegated to a revenue number that is heavy on net-new logos, a short list of prospects, and the hope that inbound opportunities and referrals materialize. If you run an agency, you have probably been in that meeting. It is a classic case of the cobbler’s children having no shoes.

Earlier this month I wrote about who so many agencies stop growing and the five places where growth tends to break. This series goes one level deeper, and over the next eight weeks I will take one problem at a time, starting with the most basic one: most agencies never built a deliberate way to grow the agency itself.

I was fortunate at Zocalo Group, because we had a proactive business development function that fueled our growth. But it did not protect us from everything (more on that down the road).

When the largest client leaves

I recently had a conversation with the CEO of an agency that lost its largest client and was not prepared for it. I will not name them, but the story is common enough that a lot of agency leaders and owners will recognize it.

Leadership had been laissez-faire about growth, and there was no go-to-market system in place because growth had never seemed to need one. New business came when it came, and the largest account was a long-time relationship that paid a great deal of the bills.

Then the client left, and the agency scrambled to stay afloat. There was no pipeline of the right kind of clients to replace the revenue. And when the team went looking for new business, it struggled to explain what made the agency different. The value proposition was unclear, and the services were not packaged or priced in a way a new buyer could easily say yes to.

The reality is that losing the client was not the core problem, since clients leave and every agency owner knows it. It’s part of the agency reality. The problem was that nothing in the business had been built to see it coming or to replace it.

A deliberate go-to-market would have changed three things. It would have flagged the risk before the loss, because large accounts rarely leave without warning signs for someone who is looking. It would have built a pipeline of the specific clients the agency should be serving. And it would have given the agency a differentiated offer to sell at the moment it needed one most.

Agencies are B2B companies, too

An agency is a B2B company, with a market, buyers, a sales process, delivery, renewals and expansion, the same as any software or services firm that sells to other businesses. The difference is that most agencies have never built a go-to-market system for themselves. They look for new opportunities as they come up, but there is no systematic process behind it.

Many agencies at $3M to $15M have no dedicated sales, marketing or business development function at all. Where those roles do exist, they tend to work in isolation from account management and delivery, each focused on its own piece with no real handoff between them. Nobody owns the agency’s growth as a whole.

The upshot is that revenue growth is not intentional. It happens when it happens. And when a large client leaves, the loss can be catastrophic, because nothing was in place to replace it.

This is not a talent problem, because the people who run these agencies are very good at what they do, and many of them have built impressive businesses from nothing. Rarely is it a lack of effort, and more likely it is that the parts of the business that keep revenue growing were never designed with the same care as the client work.

The numbers tell the same story

In the AgencyAnalytics 2026 Marketing Agency Benchmarks Report, a survey of 494 agency professionals, acquiring new clients was the top operational challenge for the fourth year in a row. In the same survey, 88% said they were confident about the next 12 months. Clearly, there is a gap between reality and confidence.

I understand that confidence, because agency people are optimists by trade. But confidence is not a plan. And when the same problem is at the top of the list four years running, it suggests most agencies are solving it the same way every year: work harder and hope.

Promethean Research’s 2026 study of 119 digital agency leaders found average revenue growth of 7.5% in 2025, with sales, profit margins and lead generation as the top concerns heading into 2026. The same study found something more encouraging: agencies that narrowed their services grew 13% on average and posted 30% net margins. As they say, “the riches are in the niches.” Focus pays, and it is a drumbeat I will continue throughout this series.

A ten-minute test

As a certified GTM Operating System partner, I use a diagnostic from GTM Partners called the 15 GTM Problems. It was built for B2B companies, and it fits agencies better than most owners expect. Here are five that frequently show up in agencies and what each one tends to look like inside an agency:

• “Business is relying on heroic sales players and not plays.” In most agencies, the heroic player is the founder.

• “Sales, Marketing, and Customer Success are out of sync.” Or, in a lot of agencies, they barely exist as separate functions. In this case, Customer Success means account management.

• “You can’t predict and forecast revenue for the next two quarters.” If you do not know what revenue will look like in April, this one is yours.

• “Your team is reactive, not proactive.” New business gets attention when the work dries up, and it stops again when the work picks up. At the same time, lacking visibility into the stability of a client relationship means you cannot flag at-risk revenue.

• “You can’t prioritize or say no to new initiatives.” Saying yes to every client request leads to scope creep, and we’ve all experienced how that kills profitability.

Here is the exercise. Give the full list to each member of your leadership team and ask them to mark their top three on their own, without discussing it first. Then compare. If everyone marks the same three, you know where to start. If the answers are all over the map, that tells you something too.

Where to start

It is tempting to respond to a slow year by buying a new tool, hiring a new business lead or rebuilding the website. Each of those can help, but on its own each one treats a symptom, and growth tends to look about the same a year later.

So, before you spend money on any of them, figure out where growth is getting stuck. Then decide on the fix (which may or may not involve AI).

Over the next seven weeks, I will take each of these in turn: the clients you should not have signed, why so many agencies sound the same, why referrals are not a pipeline, what happens in the first 90 days of a client relationship, growth from the clients you already have, what AI is doing to the billable hour and how to win, and what it takes to build an agency someone would want to buy.