A statement of work is where a Magento project is won or lost, long before any code is written. Most disputes between merchants and agencies trace back to language that was vague on purpose or by accident: a deliverable that was never quite defined, a timeline with no dependencies, a price that did not say what it included. Reading an SOW well is a skill, and it is cheaper to develop than the cost of a project that goes sideways because nobody pinned down what “done” meant.
The platform makes this more important, not less. Adobe Commerce powers about 20 percent of the top 1,000 US retailers, according to Magento market data from MGT Commerce, which means these are high-stakes, complex builds where ambiguity is expensive. A good proposal reduces uncertainty. A bad one hides it, and you only discover the gaps when they become change orders or missed launches.
What are the biggest SOW red flags?
The biggest red flags are vague deliverables, no acceptance criteria, undefined assumptions, and a timeline with no dependencies, because each one is a place for scope to slip later. If the SOW says the agency will “improve performance” without naming target metrics, you have no way to know when the work is complete or whether it succeeded. “Build a custom checkout” with no detail invites a fight over what custom included. Specificity is the whole point of the document, and its absence is rarely accidental.
Watch for three more patterns. An SOW with no stated assumptions, about your environment, your data, your access, is one where the agency can later claim anything unexpected is out of scope. A timeline with dates but no dependencies hides the fact that the schedule depends on you delivering content, approvals, or access on time, which means the first slip is blamed on you. And a price with no breakdown of what is and is not included, hosting, third-party licenses, post-launch support, is a price designed to grow. Demand the detail before you sign, because adding it after is a negotiation from a weak position.
What should a strong proposal always include?
A strong proposal always includes specific deliverables, explicit acceptance criteria, named assumptions and dependencies, a phased timeline, and a clear scope boundary. Each deliverable should be concrete enough that both sides agree when it is done, ideally tied to measurable criteria: these pages, this performance target, this integration passing these tests. Acceptance criteria turn “done” from an argument into a checklist.
The proposal should also name what it assumes and what it depends on from you, so responsibilities are clear from day one. It should phase the work, discovery, build, test, launch, with checkpoints, rather than promising a single monolithic delivery. And it should draw an explicit line around scope, what is included and what is explicitly not, so the change-order conversation is honest rather than a surprise. A proposal written this way reflects an agency that has done complex Magento and Adobe Commerce work before and knows where projects go wrong. A thin one reflects an agency hoping you will not ask.
How should you pressure-test a proposal before signing?
Pressure-test it by asking the agency to walk you through the riskiest deliverable in detail and to show the assumptions behind the estimate. If they can explain how they will approach the hardest part, name the unknowns, and tell you what would make the estimate wrong, you are dealing with a team that has thought it through. If the answers are confident but generic, the proposal is marketing, not a plan.
Tie this back to how you evaluated the agency in the first place. The same rigor that goes into vetting a Magento agency, certifications, case studies, a paid trial, should carry into reading their SOW, because the proposal is where their real understanding of your project shows. A vague SOW from an otherwise impressive agency is a warning that the sales team and the delivery team are not the same people. Get the specifics on paper, and the rest of the engagement gets easier.
