The ‘On Steroids Playbook’ for Growing Your 20-Person Agency

Twenty people is where it gets interesting. And where it usually stops.

You've outgrown the founder-led grind. You can't hand-hold every account any more. But your overhead's roughly doubled while your margin's quietly done the opposite… because rent, salaries and software all scaled perfectly neatly, but your pricing didn't budge.

Most people think they need more people. Wrong. The model that got you to twenty doesn't actually work at twenty. You need to change it.

The 20-person tipping point

There's a moment in most agencies where growth stops being exciting and starts being expensive. Twenty people is usually that moment.

You've got real capability. You've got clients, case studies, a track record. But you've also got enough overhead that you can't afford to be sloppy any more. The founder can't be everywhere. The team can't keep winging it. And hiring another five people? That doesn't necessarily fix it. Sometimes it makes it worse.

The real answer is building an agency that produces consistent results without everything riding on the founder. That takes five important shifts.

1. Stop selling services. Start selling outcomes.

At ten people, you can limp along on referrals. At twenty? You need something that creates work whether or not someone's having a brilliant sales month.

The trap most agencies fall into is becoming generalist-plus. A bit of SEO, a bit of PPC, web development, strategy… basically everything for basically everyone. That makes you easy to compare and impossible to value.

The alternative is getting specific. Pick a sector where solving that problem actually moves the needle commercially. Then build the whole thing around the outcome, not the activity.

You're not selling SEO. You're selling the growth infrastructure. You're not selling hours. You're selling a result.

That shift changes the whole conversation. Instead of "how much does this cost?" it becomes "what's this worth to us?" And suddenly value-based pricing becomes possible instead of just a pipe dream.

2. Productise the delivery

At twenty people, bespoke delivery kills you. Every client with their own process, their own reporting, their own meetings and dashboards sounds premium. Multiply that across 20, 30 or 40 clients and you've created a business that needs constant herding to keep upright.

The answer is productisation. Build a repeatable delivery model. Get a consistent playbook. Standardise what should be standardised. Get comfortable saying no to things that don't fit.

This isn't about turning yourself into a factory. It's about clearing away the noise so your best people can actually spend time on what creates value.

Simple test: look at every task your team does and ask yourself — does this actually move the client's needle? If it doesn't, why are twenty people doing it?

3. Change the structure

You can't be the chief firefighter anymore. Not at twenty.

You need a proper second-in-command. Someone who owns the machine. Might be an Operations Director, might be a COO, the title barely matters. What matters is the role.

Someone needs to own operational performance, margin, and delivery systems. Full stop.

You also need someone focused on growth for your business, not client growth. Case studies, content, LinkedIn, video — whatever creates demand for you.

And your client leadership needs to shift too. There's a real difference between managing relationships and managing performance. Account managers usually stay focused on keeping people happy. Performance leads should be obsessed with whether the client's numbers are actually moving.

Change what you incentivise and you change what gets talked about.

4. Turn proof into your marketing engine

By twenty people, you've got something smaller agencies don't have: actual proof.

Use it. Don't just publish opinions into the void. Show people how you think. Publish the blueprint. Share your methodology. Explain what you've learned. Show the numbers.

One case study with real results beats a hundred testimonials saying you're "great to work with."

The problem? Creating this content is work. So it needs an owner. If content is everyone's job, it's nobody's job. One person should own your growth marketing. Not to turn yourself into a media company — to create a steady stream of evidence that you know what you're doing.

Because proof builds trust. And trust builds pricing power.

5. Price for the business you want to build

Twenty people cost way more than ten. Bigger salary bill. Bigger software bill. Bigger management overhead. Bigger margin exposure.

So you can't afford to stay "competitively priced" just because that's what everyone else is doing.

Think about the numbers: ten clients at £10k/month gives you the same revenue as forty clients at £2,500. Completely different business though. The forty-client version has four times the relationships, four times the meetings, four times the things that can go sideways, way more complexity.

The higher-value model also lets you hire better people. Which creates a loop: Higher fees attract better talent. Better talent delivers better results. Better results create better proof. Better proof justifies higher fees.

You need to get into that loop.

The shift

The difference between a struggling 20-person agency and one that's actually working isn't really the headcount. It's the model underneath.

That's where the real transition happens. You're not tweaking the existing thing. You're building a different company altogether.

What happens next?

Once delivery is genuinely standardised, something interesting shifts. The agency stops being so dependent on individual people. The founder doesn't need to be in every decision. Delivery becomes predictable. Margins become manageable. Revenue actually recurs. The business stops looking like a bunch of talented people and starts looking like a system.

That's valuable. It's also what makes agencies attractive to buyers.

But there's a bigger question sitting underneath all this: do you actually want to build that? Because getting from £2m to £4m to £8m to £10m isn't just a sales exercise. It's building a different company entirely. Different people. Different structure. Different proposition. Different operating model.

Before you rewrite the pricing page or hire another salesperson, stop and ask: what company am I actually trying to build?

Because getting from twenty to forty people isn't that hard. Building a business that actually works at forty is.

If that's where you are, the next step is honest: look at your proposition, your pricing, your structure and your delivery model, and work out which of these five shifts is currently your biggest brake.