#The four things a dealership advertising bill contains
Media spend goes to the platform — Google, Meta, a broadcaster, a direct mail house. It is the only part that buys reach, and it is the part most stores think of as the budget.
Management fees go to whoever runs it. This is typically a percentage of spend or a flat monthly rate, and occasionally a hybrid. Creative production is sometimes bundled into the management fee and sometimes billed per asset; the difference matters more than it appears, because bundled creative tends to mean less of it.
Third-party listing sites are a fourth category that behaves nothing like the others. They bill per lead, per rooftop or on tiers, and what you are buying is placement on somebody else's audience rather than reach you direct. Rolling them into the advertising budget makes both harder to judge — keep them separate and evaluate them against different questions.
#Fee structure changes behaviour, predictably
A percentage-of-spend management fee means the agency earns more when you spend more. This is not an accusation of bad faith; it is the shape of the incentive, and it operates whether anybody intends it to. It shows up as a reluctance to recommend reducing spend on a channel that is plateauing, and as a preference for channels that absorb budget easily.
A flat monthly fee removes that pressure and introduces a different one: the agency earns the same regardless of results, so the incentive is toward efficiency of their own time rather than of your spend. Neither structure is wrong; both need to be understood.
The structure to be most careful with is a percentage fee on a budget that includes third-party listing costs, because those are not managed in any meaningful sense. Paying a management percentage on a listing site invoice is common and rarely noticed.
TABLE
Advertising fee structures and what each one pushes toward
None of these is wrong. The point is that each one produces a predictable pressure, and a store should know which pressure it has bought.
| Structure | What it pushes toward | Worth asking |
|---|---|---|
| Percentage of media spend | Higher spend, and reluctance to cut a plateauing channel | Does the percentage apply to third-party listing invoices too? It frequently does and rarely should. |
| Flat monthly retainer | Efficiency of the agency's time; stable spend regardless of results | What happens if we halve the media spend — does the fee change, and does the attention? |
| Per-lead or per-conversion | Volume of whatever counts as a lead, which is defined by the vendor | Who defines a lead, and can two vendors count the same enquiry? |
| Bundled creative inside the fee | Less creative, reused longer | How many new assets per month are included, in writing? |
| Creative billed per asset | More creative, and pressure to produce assets whether or not they are needed | Who decides an asset is needed, and against what? |
| Hybrid retainer plus percentage above a threshold | Stability at low spend, spend growth above the threshold | Where is the threshold and who set it? |
Structures compiled 2026-09-02 from arrangements commonly seen in dealership agency agreements. No fee percentages are stated because they are negotiated per engagement and no benchmark is publishable with confidence.
#The number that actually matters
Cost per lead is the number most dealership advertising reports lead with, and it is close to meaningless when four vendors define a lead differently and two of them count the same enquiry. Cost per booked appointment is the number that matters, and almost no store can produce it — not because it is hard to calculate, but because it requires one definition applied across every vendor.
Establishing that definition is a bigger improvement to your advertising than most changes to the campaigns. It usually reveals two things: that the true total is smaller than the sum of the reports, and that one channel is much better or much worse than everybody assumed.
It also changes what a budget conversation is about. Arguing over whether to spend more or less is unresolvable without it, and straightforward with it.
#Where the waste reliably sits
Bidding on your own dealership name. It converts beautifully, reports beautifully, and frequently buys clicks you would have received free. It is worth some defensive spend where competitors bid on your name, and it is not worth the share of budget most stores give it. The test is simple: reduce it and watch what happens to total enquiries rather than to paid enquiries.
Bidding on terms you already rank first for organically, which is the same problem one step out. Nobody catches this because the SEO vendor and the paid vendor report separately and neither can see the other's results.
Third-party listing spend that has never been modelled against leaving. Some stores lose real volume when they leave; others find they were paying to be shown their own shoppers, who searched the store's name and were routed through the listing site. Both outcomes are common and the exercise costs nothing.
And any campaign still running because it was set up by an agency you no longer use. This is more common than it sounds, particularly on platforms where billing is attached to the store's own account.
#Building the budget
Start from the constraint in your dealership marketing plan rather than from last year's total. If the constraint is that nobody can find the store, more bottom-funnel advertising will not address it and the budget should say so. If the constraint is conversion, the cheapest available spend is on the website rather than on reach.
Then fund in order: the things that compound, the things that convert, and the things that buy reach, rather than the reverse. Most dealership budgets are built in exactly the opposite order because reach is what gets sold.
Reserve a genuine test budget — a defined amount that is allowed to fail, with a decision date. Stores without one never try anything, and stores whose entire budget is a test never build anything. Both failure modes are common and the fix is the same line in a document.