The decision to bring marketing in-house is usually made for good reasons: cost, speed, control, and the sense that nobody outside the company will ever care as much. The decision is rarely the problem. The transition is.
Most in-house moves lose somewhere between six and twelve months of momentum. Not because the new team is weak, but because a great deal of what the agency was doing was never written down anywhere — and nobody realised until it stopped happening.
What actually has to transfer
Companies plan the transfer of people and tools. Those are the easy parts. Three other things matter more and are almost always missed:
The decisions, not just the assets. You will receive the files. You will not automatically receive the reasoning — why that headline over the other one, why that channel was dropped, which audience was tried and failed. Without it, your new team will spend the first year rediscovering things that were already known.
The calendar. Agencies carry an enormous amount of timing knowledge informally: when to brief for a seasonal push, how long approvals really take, which deadline is soft and which is not. Get this written down before the relationship ends, not after.
The judgment calls. The most valuable thing a good agency provides is knowing which corners are safe to cut under pressure. That is the hardest thing to document and the first thing you will miss.
You are not buying back a service. You are absorbing a set of habits that were never written down.
A sequence that works
Run parallel before you switch. Overlap for one full cycle — a season, a quarter, whatever your natural rhythm is. The in-house team does the work; the outgoing party reviews it. Expensive for a few months, far cheaper than a lost year.
Hire the editor before the specialists. The first hire should be the person who decides what good looks like. Specialists without that person produce a lot of competent work pointing in different directions.
Write the playbook while someone still remembers. Not a brand-guidelines PDF — a working document covering how a brief starts, who approves what, what gets tested, and what the escalation path is when something goes wrong at 6pm.
Keep one outside opinion. The main risk of in-house is not capability. It is that everyone in the room shares the same assumptions and nobody is left to say the obvious thing. A standing external review, even a few days a quarter, is cheap insurance.
What we do
Our consultancy work is built around this transition. Media planning review, campaign strategy, training your team, and the playbook itself — structured deliberately so the capability stays with your people when we step back. The engagement is designed to end.
If the arrangement is working, you should need us less each year. That is the point of it.