Category: Contract types
Statement of Work (SOW)
A project-specific contract that defines scope, deliverables, timeline, and price for one engagement — usually signed under a pre-existing MSA.
A Statement of Work, or SOW, is the project-specific contract that defines what's actually being delivered: the scope, deliverables, timeline, acceptance criteria, and price for one engagement. It sits under a Master Services Agreement (MSA) that handles the shared legal terms, so the SOW can stay focused on the project itself.
A good SOW answers five questions:
1. **What exactly is being built or delivered?** Specific enough that both sides can point at the finished work and agree "yes, this is what we signed up for."
2. **By when?** Dates, milestones, or phases.
3. **For how much?** Fixed price, time-and-materials, or a hybrid with a cap.
4. **Who's responsible for what?** Including what the client has to provide (access, content, sign-offs) for the vendor to do their part.
5. **What counts as "done"?** Acceptance criteria — the thing that should really be in every SOW and usually isn't.
When SOWs go wrong, it's almost always because of scope.
The classic scope-creep pattern: the client asks for "just one small change" that seems reasonable in isolation. The vendor agrees because it's genuinely small. This happens 15 times over the course of a project. By month three, the project is double its original size and neither side remembers how it got there.
The defense is writing SOWs that explicitly name what's *not* in scope, not just what is. "Design includes up to 3 rounds of revisions on 5 landing pages. Additional revisions and additional pages are handled via change orders at $X/hour." Change orders are boring and nobody likes signing them. That's why they work.
Standalone SOWs (no MSA above them) exist too — usually for smaller or one-off engagements. They have to carry all the legal weight the MSA would normally hold, which makes them longer and more tedious to negotiate. If a relationship is going to last more than one project, the MSA is worth the upfront investment.