These two titles get used interchangeably more often than they should. While the line blurs at smaller agencies, the distinction matters once you're trying to figure out who's actually responsible for what — especially if you're hiring, or trying to understand why a campaign isn't performing the way you expected.
Media Planner: The Strategist
A media planner sets the overall strategy: which channels to use, how to split the budget across them, and what the campaign needs to achieve. Think of this as the blueprint — it answers questions like "should we be on TikTok or Connected TV" before a single dollar gets spent. Planners typically work from research: who the target audience is, where they spend attention, what competitors are doing, and what's realistic given the available budget.
A strong media plan accounts for how channels work together, not just in isolation. Someone might first see a brand on social media, then later search for it directly on Google — a planner's job includes anticipating that journey and making sure budget is allocated in a way that supports the whole path, not just the most visible single touchpoint.
Media Buyer: The Executor
A media buyer takes that plan and makes it real — negotiating placements, setting up campaigns, managing bids, and adjusting performance day to day. If the planner draws the map, the buyer is the one actually driving the route and rerouting around traffic in real time. This is where the plan meets reality, and reality rarely matches the plan perfectly — a good buyer adjusts without losing sight of what the plan was actually trying to achieve.
Where the Roles Overlap
At smaller agencies and in many in-house teams, one person handles both planning and buying. This isn't necessarily a downgrade — a media buyer who also does the planning often has tighter feedback loops, since they're not waiting on someone else's strategy to make an in-flight adjustment. They can see a problem in execution and immediately reconsider the strategic assumption that caused it, rather than passing that observation up a chain and waiting for a revised plan.
- Planning-heavy: large enterprise teams, complex multi-channel launches
- Combined role: small agencies, lean in-house teams, most small-to-mid-sized business engagements
- Buying-heavy: highly technical platform execution (e.g. programmatic trading desks)
Which One Do You Actually Need?
If you're a smaller business without an existing media strategy, you likely need both functions — which is exactly why most small-business engagements bundle planning and buying together rather than hiring each separately. Trying to hire a planner and a buyer as two distinct people, before you even have a working strategy, often adds coordination overhead without adding proportional value.
This combined approach — strategy and execution from the same team — is exactly how we work at Project Five Digital. If you'd rather not coordinate between separate planning and buying vendors, get in touch and we'll walk you through how we handle both.