Why we cap our work at eight clients.

Most agencies talk about scale. We've come to think about it the other way around. Restraint, in this business, is a competitive advantage that's harder to copy than any pitch deck.

Common Field has a hard ceiling: we don't work with more than eight clients at a time. Two senior partners, four senior specialists, and a strict cap. It's a small number on purpose, and the most common question we get from peers is whether it's actually rational.

It is — but the reasoning isn't the one most people expect.

The math of attention

A senior specialist — the kind of person who's spent ten years doing one thing well — can hold maybe three or four projects in deep working memory. Not in their calendar; in their head. Three or four clients whose business they understand well enough to make good decisions without checking the brief.

Past that, the work gets shallower. Not worse, exactly. Just less theirs. The strategist starts deferring to the brief instead of arguing with it. The media buyer stops noticing the small things that don't add up. The designer hits "approve" on work they would have pushed back on a month earlier.

This is the quiet trade-off of growth in service businesses. It happens before anyone admits it's happening — usually right around the point where the agency's revenue is going up.

Eight clients across six senior people gives every project a primary owner with bandwidth, and a secondary owner who can step in without breaking flow. Twelve would not. We've done twelve before, in another life.

The work gets shallower. Not worse, exactly. Just less theirs.

What growth would have to give up

Could we hire? Of course. Could we add another partner, four more specialists, and double the cap to sixteen?

Yes. And here's what we'd have to give up to do it well.

The first thing: founder access. Right now both founders are on every project, in every weekly call, on every Slack channel. At sixteen clients, that math stops working — partners become managers of work they don't touch. Clients still believe they're working with senior people. The senior people are now in standups, not in the work.

The second thing: the bar for who we hire. Senior specialists at our level are rare. We could find more — but we couldn't find them quickly without lowering the bar. And once the bar drops, it tends to keep dropping.

The third thing: the kind of clients who want to work with a studio like ours. They aren't looking for the agency that grew. They're looking for the studio that didn't. Our roster self-selects for it — and we'd burn that trust the day we became a bigger thing.

The economic case

The financial argument is the easy one. Eight high-fit engagements, billed at senior rates, with three-to-five-year retention, produces a business that comfortably pays six people well, lets the founders take time off, and doesn't depend on the next sales quarter.

It produces a different kind of agency entirely. Most agencies are sales businesses with a delivery problem — they have to keep selling because clients churn. We're a delivery business with a small new-business question once or twice a year: who replaces the engagement that just wrapped, if anyone?

Sometimes the answer is no one. We've left seats empty for a quarter rather than fill them with the wrong client. We could afford to do that exactly because we're small.

Most agencies are sales businesses with a delivery problem. We're a delivery business with a small sales question, once or twice a year.

A question for anyone running a service business

If you're reading this and you run a service practice — agency, studio, firm, consultancy — here's the question worth sitting with. Not what's your growth plan, but: what's your restraint plan?

At what scale do you stop? On what metric? Who decides, and on what timeline?

Most service businesses have never written this down. The default is "we'll keep growing." But growth in a service business has a quiet cost that doesn't show up on a P&L until much later — and by then, the thing that made you good is harder to get back than to keep.

For us, the number is eight. For you it might be different. But the discipline of having a number — and naming the trade-offs you're choosing — is the work itself.