What breaks first when an agency hits 15 people

At eight people, IT is a set of favors. Somebody configures the new MacBook over an afternoon, somebody else remembers where the client folders live, and a founder resets the odd password between meetings. At fifteen, the same work is being done by the same people, but it now happens often enough to have a shape.

It breaks in a consistent order, and the order is useful because it tells you what to fix next.

Onboarding breaks first

An afternoon spent configuring a Mac by hand is fine when it happens twice a year. At fifteen people, with normal agency turnover, it happens close to monthly, and it is never the same afternoon twice. Automated enrollment through Apple Business Manager and an MDM turns that afternoon into a box the new hire opens at their own desk. Until that exists, every hire costs a senior person half a day and produces a Mac configured slightly differently from the last one.

The file structure stops holding

Ad-hoc project folders work while one person is doing the filing. Once three or four people are creating folders, the structure becomes an archaeology of everyone’s separate habits. The failure is undramatic: things stay findable, just slower each quarter, until somebody rebuilds work that already existed somewhere.

Access control becomes a client problem

The everyone-can-see-everything model is a reasonable default at eight people, not a security decision. It becomes a contract problem the first time an enterprise client sends a security questionnaire asking who can open their files and how that access is removed when someone leaves. Answering honestly is easy. Answering well requires the access model to have existed before the question arrived.

Nobody can say what the agency owns

Ask how many Macs the agency owns, and whether each one is encrypted with FileVault, running a supported macOS version, and still covered by warranty. At fifteen people that answer is usually a spreadsheet somebody stopped updating, plus two machines that were bought personally and expensed. The gap costs money at renewal and at insurance time, and it costs a great deal more on the day a laptop goes missing and nobody can confirm whether it was encrypted.

The person doing IT in the margins runs out of margins

There is always one: a founder, an ops lead, or the senior designer who is good with computers. At eight people the role costs them a few hours a month. At fifteen it is closer to a day a week of interruptions that arrive at the worst possible moment, and it comes out of billable or leadership time. The honest calculation at that point is what that day is worth, not whether IT support is worth paying for.

If you only do one thing

Fix onboarding. Automated enrollment stops the next hire from adding to the pile, and setting it up forces the decisions about device standards and file access that the other four problems are made of.