Revenue Share or Retainer: How a Marketplace Growth Partnership Is Paid

There are three common ways to pay an outside team that runs a marketplace business, and most deals are a blend of them. A retainer is a fixed monthly fee for a defined scope. A percentage of advertising spend ties the fee to the budget it manages. A revenue share pays the partner a part of the sales, usually the sales above an agreed baseline, so the partner earns when the business grows and not otherwise.

None is better in general. Each rewards something different, and each fits a different kind of brand. The one rule that holds across all three is that the structure should reward what the brand actually wants, and in a revenue share that comes down to a single number agreed before work starts: the baseline.

A retainer rewards doing the agreed work. It is predictable for both sides, it suits a scope that can be written down, and it leaves the brand in control of decisions and the partner paid whatever the results. Its weakness is that nothing in it rises or falls with the outcome, so the brand has to measure results itself and decide whether the work is worth renewing.

A percentage of advertising spend rewards spend. That is not always a problem, since a well run account often should spend more, but it puts the partner's income on the side of a bigger budget, which a brand should notice when the advice is to raise one. What a management fee should cover is set out in what Amazon PPC management actually involves.

A revenue share rewards growth. The partner earns a part of the sales it helps add, so its income moves with the brand's, and it has a reason to work on everything that grows sales, listings, stock, pricing, advertising and new channels, rather than only the part of the account it was hired for. The cost is that it needs far more agreement up front, and far more trust in the numbers, than either of the others.

Most real agreements mix the structures, because each one alone leaves one side carrying a risk it cannot control. The common blends each fix a specific weakness.

A base fee plus a share of growth. The base covers the fixed cost of the team and the work that has to happen whatever the month brings; the share pays for results above the baseline. It suits a brand that wants the partner invested in growth without the partner going unpaid in a slow season.

Tiers above the baseline. A smaller share of the first band of growth and a larger one beyond it, or the reverse, depending on which growth is hardest to earn. Tiers make the incentive match the difficulty, and they need the bands written down as numbers, not described.

Caps and floors. A floor protects the partner in a month the brand caused to go badly, such as a stockout; a cap protects the brand from paying a windfall share on growth that came from somewhere else, such as a competitor leaving the market. Both are honest admissions that a baseline cannot predict everything.

A minimum term. Growth work takes months to show, and a share agreement that either side can end in the first month rewards nobody. A minimum term, with a review point, gives the work time to land and both sides a clean moment to decide.

Whatever the blend, write it as a formula with an example month worked through it. An agreement that cannot be calculated from the reports both sides already have will be argued about.

A revenue share on growth only works if both sides agree what the business would have sold without the partner. That baseline is usually built from the trailing months, adjusted for the season, because a brand that sells half its year in the fourth quarter cannot be measured against a quiet spring. Set too low, the partner is paid for growth that would have happened anyway; set too high, the partner can do good work and earn nothing, and will eventually stop doing it.

The definitions matter as much as the number. Which channels count, only one marketplace or every one the partner touches. Whether revenue means gross sales or sales net of returns, refunds and promotions. What happens to the baseline when a product is discontinued, a new one launches, or a price changes. Each of those, left vague, becomes the argument in month seven.

Write the calculation down with a worked example from the brand's own figures, and agree where the numbers come from, which reports, read on which day. A share deal whose numbers both sides read the same way is a partnership; one whose numbers each side reads differently is a dispute waiting for a date.

A share of growth is calculated from sales, and several things move sales that neither side's work caused. The agreement should say how each is treated before the first one happens.

Stockouts. If the brand runs out of stock, sales fall for a reason the partner could not prevent, and the months after it rebuild rank rather than grow. Most agreements either pause the comparison for products out of stock or adjust the baseline for the days they were unavailable.

Price changes. A price rise lifts revenue without any extra units sold; a price cut does the opposite. Decide whether growth is measured in revenue, units or contribution, and if in revenue, how a price change agreed by both sides is treated.

Returns and refunds. Count sales net of returns, read after the returns window has passed for the month, or the share is paid on sales that come back. A month is usually settled one month late for exactly this reason.

Marketplace fee changes. When a marketplace raises a fee, the brand's margin falls without any change in sales. An agreement based on contribution should say whether fee changes move the baseline, because neither side caused them.

New products. A product launched during the agreement has no baseline. Decide whether its sales count in full, count after a launch period, or sit outside the share.

A partner paid on growth needs the levers that create it. That means access to the selling account and the advertising, a say in the listings and the pricing, and enough stock to sell what the work creates. A brand that keeps pricing to itself and runs out of stock every second month has handed the partner the risk without the controls, and the deal will not last.

It also needs time. Growth from catalogue work, new listings and advertising builds over months, so a revenue share with a three month term rarely pays either side. Twelve months is a more honest horizon for most marketplace businesses, with review points along the way. Giving an outside team access properly, the way Amazon expects, is covered in giving an outsourced team access to Seller Central.

Whatever the structure, agree the report before the work starts: one page a month, built from named sources, the marketplace's own business and advertising reports, read on a fixed day, showing sales, the baseline, returns, advertising cost and the margin left after fees. The partner prepares it; the brand can reproduce it.

Under a revenue share the report is the invoice, so it has to be checkable by somebody who was not in the room when the deal was made: the brand's finance person, a new manager, an auditor. If they cannot get from the source reports to the fee in an hour, the method is too clever and will be argued about.

Under a retainer or a percentage of spend, the same page is how the brand decides whether to renew. It costs little to produce, and it removes most disagreements before they start, because both sides are looking at the same numbers on the same day.

Retainers drift. The scope written in month one is not the work being done in month ten, and nobody updates the agreement until one side feels short-changed. A short quarterly review of the scope against what is actually being done keeps them honest.

Percentage of spend can reward the wrong advice, as above, and is best paired with a target the brand sets itself, such as a profit or a total advertising cost of sale, so the partner is measured on more than the budget.

All three need exit terms written at the start: what happens to the listings, the content, the campaigns and the access when the deal ends. The brand should own all of it and get a clean handover, with every login transferred and nothing left in the partner's name; agreeing that on day one costs nothing, and on the last day it can cost the business.

Revenue shares fail on attribution and on margin. A partner paid on sales can chase top line at the expense of profit, so the agreement should name the margin floor or the advertising cost ceiling it works within. And a brand that runs its own promotions, launches or price changes during the term should agree in advance how those enter the calculation.

The payment structure is the part of an agreement people argue about at the start. The terms below are the ones they argue about at the end, and they cost nothing to settle early.

Who owns what. The selling account, the advertising account, the brand registration, the listings, the images and the data all belong to the brand. The partner works through user permissions the brand grants and can remove. Any creative made during the agreement should transfer with the work, stated plainly.

Who pays which costs. Advertising spend, marketplace fees, stock, freight, photography and any software a partner proposes. Ad spend is usually paid by the brand directly to the marketplace, so the partner's fee and the media budget never mix.

Notice and handover. How much notice either side gives, and what the partner hands back at the end: access removed, campaigns documented, files returned, and a final month's report. A clean exit clause is a sign of a partner confident it will not be needed.

Payment timing. When each month is calculated, from which reports, and when the invoice is due. A share settled a month in arrears, after returns, avoids most later corrections.

Confidentiality. Both sides see each other's numbers and methods. A short mutual confidentiality clause protects the brand's sales data and the partner's way of working alike.

A retainer fits a brand that wants control, has a defined piece of work, or is early enough that there is no reliable baseline. A share of growth fits an established brand with clean numbers, a partner trusted with real decisions, and a horizon long enough for the work to pay. Many deals start on a retainer and move to a share once a year of shared numbers exists to build the baseline from. What to ask any partner before choosing is in how to choose an Amazon agency, and which jobs are worth handing over first is in what to outsource first.

Partnerships built on growth rather than tasks, from a retail growth partnership to Amazon Renewed and Vendor Central, are what our strategic partnerships are for.