Co-op is the set of costs Amazon shares with you rather than absorbing. Three pieces make up most of it: marketing development funds, a damage allowance covering damaged and defective returns, and a freight allowance covering the cost of moving your product into Amazon’s warehouses.
Each is meant to run off a negotiated agreement. What actually happens on a lot of accounts is different, and the gap between the two is a recoverable balance almost nobody claims.
The provisional rate
Amazon does not wait for your agreement to be signed before it starts charging co-op. Where no agreement is on file, it applies a provisional rate and deducts against it every period, so that products can be listed and sold without the commercial paperwork blocking anything.
Provisional rates are set by Amazon, not negotiated with you, and they are typically higher than the rate you would have agreed. Every period they run, the gap accrues.
What is supposed to happen next
When the real agreement is signed, Amazon is supposed to stop charging the provisional rate and apply your negotiated rate retroactively across the period the provisional rate was in force. The difference comes back to you as a credit.
The retroactive credit is the part that goes missing. The forward rate usually corrects itself, because it is visible on the next invoice. The back-credit for the provisional months is a separate calculation nobody on your side is watching for, and it does not announce itself when it fails to arrive.
Nothing about this is adversarial. It is a reconciliation that requires someone to hold the effective date of the signed agreement in one hand and the co-op invoices from the provisional window in the other. Finance teams close the month against what was billed, not against what should have been re-billed retroactively for a quarter that already closed.
Two years, and then it is gone
Co-op carries its own deadline, separate from anything on the shortage side: Amazon applies a two-year limit on disputing a co-op invoice, measured from that invoice’s date.
That is a shorter clock than most vendors assume, and it is measured per invoice rather than per agreement. A provisional period that ran three years ago is closed. One that ran eighteen months ago is not, but it will be soon.
Where else co-op goes wrong
Beyond the provisional true-up, the same three components misfire in predictable ways:
- Damage allowance charged against the wrong return volume — the allowance is a percentage, so an inflated return base inflates the deduction.
- Freight allowance applied to shipments you paid to move — collect and prepaid arrangements get crossed, and the allowance is taken anyway.
- MDF deducted for programmes that did not run, or that ran at a smaller scale than the accrual assumed.
- An agreement applied to the wrong brands in a multi-brand vendor group, where one label’s terms get run across another’s volume.
What the dispute needs
Co-op disputes are documentation exercises rather than investigations. What resolves them:
- The signed co-op agreement with its effective date, in the version that was in force.
- The rate schedule for each component — MDF, damage, freight.
- The co-op invoices issued during the provisional window, so the gap can be calculated per period.
- For a multi-brand group, the mapping of agreements to brands, so the right terms are applied to the right volume.
Of the six deduction categories on a vendor account, co-op is often the cleanest to win. The arithmetic is not in dispute once both documents are on the table. It goes unclaimed because those two documents are almost never on the table at the same time.
More on how co-op is audited, or start with the free audit and see what the provisional periods on your account are holding.