Most SaaS companies eventually end up with some combination of a Master Services or Subscription Agreement (“MSA”) and a Statement of Work (“SOW”), often without ever deciding on purpose which document is supposed to do what. That usually happens by accident: an early customer needed a signed contract fast, so a single document covered everything, and each deal since has been a variation on that first one. It works until it doesn’t, usually right when a dispute or a new professional-services engagement exposes the gaps. Some companies call the SOW an Order Form or Commercial Agreement. Still others designate an SOW for professional services only and use a separate Order Form or Commercial Agreement for product purchases or subscriptions. For simplicity, this post uses “SOW” to refer to all of these documents, regardless of what your company calls them.

What an MSA Actually Does

The MSA is the overall governing document for the relationship. It sets the terms that should stay constant across every engagement with a given customer: limitation of liability, indemnification, intellectual property ownership and license grants, confidentiality, term and termination, and terms dictating how disputes get resolved. It also incorporates or references other supporting documents that carry the operational detail, typically a Data Processing Agreement (“DPA”) for personal data handling and a Service Level Agreement (“SLA”) for uptime and support commitments. Once an MSA is signed, it should not need to be renegotiated every time the relationship changes (i.e. additional services/products are added, or a subscription is renewed, etc.).

What an SOW Actually Does

The SOW carries the deal-specific detail: scope of work, deliverables, timeline, fees, and any engagement-specific assumptions or acceptance criteria. A well-drafted SOW does not restate liability caps, indemnification, or IP ownership; it incorporates the MSA by reference and leaves those terms where they belong. That separation is what lets a SaaS company add a new project, a new module, or a new phase of implementation without reopening the entire contract.

When You Need Both

If the product involves a recurring subscription plus periodic professional services, onboarding, custom integration work, implementation, or training, you need both documents. The MSA governs the relationship and the risk allocation; each SOW governs a discrete piece of work under that umbrella. This structure lets you sign a new SOW in days instead of weeks, because the terms that actually take time to negotiate are already settled.

When a Single Order Form Is Enough

Not every deal needs a freestanding SOW. A self-serve subscription with no custom implementation or professional services can often be handled with an MSA plus a short order form specifying the plan, term, and price. Reserve the full SOW structure for engagements that involve actual scoped work, deliverables, or a project timeline.

Where SaaS Companies Typically Get Tripped Up

Three recurring problems show up again and again:

1. An SOW that includes its own liability or indemnification language that conflicts with the MSA, creating ambiguity about which terms actually control.
2. An SOW signed for an early pilot or proof of concept with no MSA in place at all, so there is no governing framework once the relationship expands.
3. No order-of-precedence clause specifying which document controls if the MSA and an SOW conflict, which turns a drafting oversight into a battle of contracts with no clearly stated winner. Most well-drafted MSAs default to the MSA controlling unless the SOW expressly says otherwise, so state that default in your own template rather than leaving it for a judge to decide.

A Note on Execution

All 50 states are covered by the federal ESIGN Act, and each state also has its own laws recognizing electronic signatures and records as legally effective, so executing MSAs and SOWs through AdobeSign, DocuSign or a similar platform is enforceable. However, that is not a substitute for good contract structure. A clean order-of-precedence clause and clear incorporation-by-reference language matter regardless of how the documents get signed.

A Practical Starting Point

Review your current templates for three things: a clear order-of-precedence clause, proper incorporation of the DPA and SLA by reference rather than restating their terms, and a standard SOW template that pulls its liability and IP terms from the MSA rather than reinventing them each time. Getting this structure right once saves renegotiation on every deal after.

This post is provided for general informational purposes only and does not constitute legal advice. Reading this post does not create an attorney-client relationship. Contact ME to discuss your company’s specific contract structure.