A brand sets aside money to help its dealers advertise locally. The dealer runs the campaign, proves they ran it, and gets paid back for part of the cost. That is co-op advertising in one sentence. Everything hard about it lives in the space between "runs the campaign" and "gets paid back."
If you manage these funds at a brand, or handle marketing at a dealer, you already know that space is where the arguments happen. What follows is a walk through how the whole thing is supposed to work, and where it tends to break.
Where the money comes from
Co-op funds, sometimes called cooperative advertising funds, are money a manufacturer or brand commits to shared local marketing. The brand wants its name shown correctly in every market. The dealer wants help paying for ads. Co-op is the arrangement that connects the two.
The fund is usually built as an accrual: a percentage of each unit, or a fixed amount, adding up over time into a pool the dealer can spend against. How much a dealer can claim, and on what, is set by the program rules. Those rules are the whole game.
The four stages, and what goes wrong in each
The plan
Before spending, a dealer proposes what they intend to run. Channels, budget, the split between brand advertising and direct response, expected results. A good plan is specific enough that the brand can say yes or no with confidence. A vague plan is where disputes start, because nobody agreed on what "approved" actually covered.
The approval
The brand reviews the plan against the rules and either greenlights it or sends it back. This step exists to catch problems before money is spent, not after. When approval is a slow email chain, dealers either wait and lose the timing on a campaign, or go ahead without sign-off and gamble on getting paid back. Neither is a good spot to be in.
The proof
The dealer runs the campaign and collects evidence. Invoices, screenshots of the ads, photos from the event, links to the posts. This is the part everyone underestimates. Months later, a reimbursement claim lives or dies on whether the proof was captured at the time, in a form the brand accepts. A shoebox of receipts found in December will not survive review.
The payout
The brand checks the proof against the approved plan and the program limits, then pays. If the earlier stages were clean, this is quick. If they were not, this is where the plan and the evidence get laid side by side and the gaps show up. Every gap is a phone call, a delay, or a claim that gets denied.
Brand advertising versus direct response
Most programs treat two kinds of spend differently. Brand advertising, which is the awareness work, and direct response, which is the lead-generation work. You will also see these called above-the-line and below-the-line. Programs often cap or match them at different rates, so a dealer who does not track the split can spend in good faith and still get only part of it back. Getting the split right while planning is quieter and cheaper than arguing about it at payout.
Why it gets messy
Nothing about the idea is complicated. One side pays part of the other side's advertising, as long as the rules are followed and the proof holds up. It gets messy because the four stages usually live in four different places. The plan is in an email, the approval is in someone's inbox, the proof is in a folder or on a phone, and the reimbursement math is in a spreadsheet. When a claim is questioned, someone has to reassemble all of it by hand.
Pulling the stages into one flow, where the approved plan, the evidence, and the limits sit together, is the reason a tool like Sizle exists. The concept holds no matter what you run it on, though. Approve before the spend, capture proof as it happens, and keep the plan and the evidence in the same place so the payout is a check rather than an investigation.
If you are setting up a program, or trying to repair one that generates too many disputes, start there. Most co-op friction is not a money problem. It is a paperwork problem that got expensive because the paper was scattered.