Ecommerce Agency Pricing Explained: Retainer vs Project vs Revenue Share
By Shaheer Khan, founder of Markify Ecommerce
When you ask three ecommerce agencies for a quote, you may get three completely different structures: a flat monthly fee, a one-off project price and a percentage of sales. They are hard to compare until you understand how each model works and what it rewards. This guide explains the main models, their pros and cons, and how to compare quotes fairly.
1. Monthly retainer
How it works: you pay a fixed monthly fee for an agreed scope of ongoing work, for example Amazon advertising management, listing updates, account health monitoring and a monthly report.
Good for: ongoing management of an account that needs regular work every week.
Pros
- Predictable cost for both sides.
- The agency is not tempted to push ad spend or sales volume just to raise its own fee.
- Clear scope makes it easy to see what you are paying for.
Cons
- You pay the same in quiet months as in busy ones.
- If the scope is vague, it is hard to hold the agency to account.
What to check: the written list of what is included each month, how many hours or tasks it covers, what costs extra, the minimum term and the notice period.
2. Project fee
How it works: a fixed price for a defined deliverable with a clear end: a Shopify store build, a set of A+ Content, a product launch, a US LLC formation or a suspension appeal.
Good for: setup work, one-off fixes and businesses that will run things themselves afterwards.
Pros
- You know the total cost in advance.
- No ongoing commitment.
Cons
- Ongoing work (ads, account health) does not fit well into a project.
- Changes outside the original scope cost extra, so define the scope carefully.
What to check: exactly what is delivered, how many revision rounds are included, the timeline, and what support is included after delivery.
3. Revenue share or profit share
How it works: the agency takes a percentage of sales or profit, sometimes only above a starting baseline.
Good for: situations where both sides trust the numbers and want the agency's pay tied closely to results.
Pros
- The agency earns more when you earn more.
- Lower fixed cost when sales are small.
Cons
- A share of sales can reward revenue that is not profitable, for example by raising ad spend.
- A share of profit needs agreement on how profit is calculated, which can cause disputes.
- When sales grow a lot, a percentage can become far more expensive than a retainer for the same work.
- The agency needs access to your full financial data.
What to check: whether it is sales or profit, the exact definition (before or after ad spend, fees, returns), any baseline, any cap, and what happens if you end the agreement.
4. Hybrid
How it works: a smaller base retainer plus a performance bonus or percentage above an agreed target.
Good for: growing brands that want predictable core costs and some reward for growth.
This is often the fairest structure for both sides, as long as the targets and calculations are written clearly.
How to compare quotes fairly
- Write your own brief first: channels, number of products, ad budget, what you need done and what you will handle yourself.
- Ask every agency to quote on the same brief.
- Convert everything to a yearly cost at your current sales and at your target sales. A revenue share that looks cheap today may be expensive in a year.
- Compare scope line by line, not just price.
- Ask who does the work and how many accounts each person manages.
- Check the exit terms: notice period, handover of campaigns and assets, and ownership of everything created.
Red flags in any pricing model
- Guaranteed results ("we guarantee $50,000 a month in sales").
- No written scope.
- Very long lock-in contracts for a new relationship.
- Fees tied to ad spend that the agency controls without limits.
- The agency wanting to own your seller account, ad account or brand.
- Pricing that is far below the market for the work promised. Someone has to do the work.
How Markify prices
We publish starting prices for every service on our services page: for example, Amazon account management from $299 a month, eBay from $249 a month and Shopify store builds from $499. Ongoing management is a monthly retainer with a written scope, starting with an initial three-month term and then 30 days' notice. Setup work such as store builds, company formation and appeals is priced as a project. Your exact quote follows a free account audit and is confirmed in writing.
Frequently asked questions
Which pricing model is best?
For ongoing account management, a clear retainer or a retainer-plus-bonus hybrid is usually the easiest to manage. Projects suit setup work. Pure revenue share can work but needs very clear definitions.
Why do agency prices vary so much?
Scope, experience, team location, and how many accounts each manager handles. Compare what is actually included, not just the headline price.
Is it cheaper to hire in-house?
Sometimes. See our agency vs in-house cost comparison and 10 questions to ask an agency.
Work with Markify Ecommerce
Markify Ecommerce (listed on Google Maps as Markify Ecommerce - Unicored Technologies) is an ecommerce marketplace management agency in Bahria Orchard, Lahore. We manage Amazon, eBay, Walmart, Shopify, Etsy and TikTok Shop accounts, and we set up US LLCs and UK Ltd companies for Pakistani sellers.
- Office: Central Block, Bahria Orchard, Raiwind Road, Lahore 55150, Punjab, Pakistan
- Phone & WhatsApp: +92 321 3131641
- Free account audit: Send us your store or account details and we will reply with the first fixes we would make.