We lost our biggest client in March. It was 30% of revenue.
The email came on a Tuesday. Polite, short, "going in a different direction." I read it three times and then went for a walk, because I didn't trust myself to reply.
Here's what I'd tell any agency owner who's where I was a year ago:
One client at 30% isn't a client. It's a boss.
We'd bent our process around them. Their review cycle became our review cycle. Their tools became our tools. When they left, we had to relearn how to work with everyone else.
What we changed:
→ No client above 15% of revenue. If one grows past that, we go and find the next one.
→ One onboarding process for everyone, written down.
→ I spend Friday mornings on new business, even when we're busy. Especially when we're busy.
Seven months later we have more clients, smaller ones, and I sleep better.
The loss hurt. But the real problem started much earlier: the day I stopped looking for new work because one account felt safe.
If you run an agency: what's your biggest client as a percentage of revenue?