A media planning agency decides where your advertising money goes before anybody spends it: which audiences, which channels, in what proportions, at what times of year, against what the campaign is supposed to achieve. It is a research and modelling job, and it is genuinely separate from media buying, which is the execution of the plan in the auctions and the sales houses. Plenty of shops sell both, which is convenient and also the source of most of the conflicts of interest in the industry. This page explains what the deliverables should look like, how planners charge, and the contract language that decides whether you can see what your money actually bought.
Planning and buying are different jobs
Planning answers who, where and why. It starts with the business problem, defines the audience with actual data rather than a persona sketch, sizes the addressable reach in each channel, allocates budget across them, sets the flighting across the calendar and states in advance what success will be measured on. Buying answers how much and from whom: negotiating the inventory, running the auctions, trafficking the creative, checking delivery against what was promised. The distinction matters commercially because a shop that plans and buys has a reason to recommend the channels it is best at buying, or the inventory it holds a preferential deal on. That is not automatically a problem, but it is a question you should ask out loud, and the answer belongs in the contract rather than in a reassuring phone call.
How planners charge, and what each model does to their advice
Three fee models dominate. A commission on media spend is the oldest and the most familiar, and its incentive is obvious: the agency earns more when you spend more, and earns nothing for telling you to spend less. A flat retainer or a scoped project fee separates income from spend, which is cleaner, though it can make the agency reluctant to do work outside the original scope. A resourced fee, priced from the named people and their time, is the most transparent of the three and the one large advertisers increasingly ask for, because you can see what you are paying for and what happens if the senior planner leaves. Ask which model is on offer, ask what the agency earns if your budget halves, and read the answer as information about the advice you are going to receive.
Transparency terms worth settling before you sign
Ask three questions in writing. First, does the agency buy any inventory as principal, meaning it purchases media on its own account and resells it to you at a margin, rather than acting as your agent? That model is legal and widespread and it changes what your reported cost per thousand means. Second, does it receive rebates, volume bonuses or any other value from the platforms and sales houses tied to your spend, and does that get passed back? Third, will you get access to the underlying platform accounts and log-level delivery data, or only the agency's reports? Advertisers who negotiate audit rights at the start almost never need them; the ones who ask afterwards usually discover the contract never gave them any.
How the work is normally bought
For a mid-sized advertiser, the planning engagement is often a scoped project (an audience and channel plan, a budget allocation, a measurement framework) followed by an execution retainer. Smaller advertisers frequently skip the standalone planner and buy planning as part of a social or search programme, since the practical decision is which few channels to run and how to split a modest budget between them, and that is a conversation with whoever will be running the accounts. Either shape works. What does not work is buying execution with no plan, because the campaign then gets measured on whatever the platform reports best, and the answer arrives too late to change anything.
Questions people ask about media planning agency
Do I need a media planning agency or just a buying agency?
If your channel mix is settled and the question is efficiency, a buyer is enough. If you are entering new markets, launching a product, or cannot explain why your budget is split the way it is, the planning work is the part you are missing and the part a buyer has no commercial reason to do carefully.
What should a media plan actually contain?
An audience definition with the data behind it, reach and frequency estimates per channel, a budget allocation with the reasoning stated, a flighting calendar, the creative requirements each channel imposes, and a measurement plan agreed before launch. If it is a slide of logos and a pie chart, you have received a proposal, not a plan.
Are influencer and native placements handled differently?
They carry disclosure obligations. The FTC's guidance for advertisers is that material connections between a brand and an endorser must be disclosed clearly, and that advertising which looks like editorial content should be identifiable as advertising. Ask who is responsible for enforcing that across your placements and get the answer in the contract.
How do I compare two planning proposals fairly?
Normalise the fee model first: convert commission to an implied annual figure at your actual spend so you are comparing like with like. Then compare the named people, their hours, the transparency terms and the measurement framework. Comparing headline percentages across different models tells you almost nothing.