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Key takeaways
- A statement of work describes what a supplier will do for one project, what it will deliver, by when, at what price and how acceptance works.
- It usually sits under a master agreement. The master sets the legal terms and the SOW sets the scope for one piece of work.
- Write deliverables as things you can inspect and acceptance as a test, not an opinion.
- A missing acceptance clause is the most common cause of disputed invoices.
Free PDF and Excel: Statement of work template and acceptance checklist. Get it below
What a statement of work is
A statement of work is a document that sets out the specific work a supplier will perform for a customer, including deliverables, timeline, acceptance criteria and price.
It answers questions the master agreement leaves open. What exactly is being built? Who provides what? When is it done? How does the customer decide it is done? The MSA versus SOW page shows how the two documents divide the work, and the master service agreement guide covers the legal frame.
A retailer hires a consultancy to migrate its supplier master data to a new system. The SOW lists the 14,000 supplier records in scope, the fields to be cleaned, a pilot of 500 records, a final load date and a rule that acceptance means 98 percent of records pass a defined validation script.
When the consultancy loads the data, the retailer runs the script. 97.4 percent pass, so acceptance waits for a fix. There is no argument because the test was written before the work.
Sections to include
| Field | What goes in it | Why it matters |
|---|---|---|
| Purpose and background | Why the work is happening and what the end state is. | Keeps the team aligned when details shift. |
| Scope and exclusions | What is in and what is out. | Exclusions prevent most scope creep. |
| Deliverables | Named outputs with a description of each. | Each one is something you can check. |
| Timeline and milestones | Dates or durations for each stage. | Ties to payment. |
| Roles and responsibilities | Who does what on each side, including customer inputs. | Delays are often on the customer side. |
| Acceptance criteria | The test that decides a deliverable is done. | Avoids opinion fights. |
| Price and payment | Fixed price, time and materials, or milestones, with invoice triggers. | Matches invoices to progress. |
| Assumptions | Conditions that the price and timeline depend on. | If one fails, the SOW changes. |
| Change control | How scope changes are requested and priced. | Links to the change order process. |
Free PDF and Excel
Statement of work template and acceptance checklist
A SOW outline with scope, deliverables, acceptance and change control, plus a review checklist.
- SOW outline
- Field guide
- Review checklist
- Excel deliverables and milestone tracker
Ways it goes wrong
- Deliverables described as best efforts instead of outputs.
- No acceptance criteria, so the customer never signs off.
- Assumptions that sit in an email and not in the document.
- A timeline that depends on customer inputs with no deadline for them.
- Pricing by hours with no cap.
- A SOW that contradicts the master agreement and no rule on which wins.
- Scope and exclusions are written.
- Each deliverable can be inspected.
- Acceptance is a test, not a feeling.
- Milestones and payment match.
- Customer responsibilities have dates.
- Assumptions are listed.
- Change control is defined.
- Precedence between the SOW and master agreement is stated.
Last checked: 19 October 2026. General contracting practice. This is not legal advice. Have counsel review any contract before signing.
Frequently asked questions
What is the difference between a SOW and a contract?
A contract sets legal terms. A SOW sets the scope of one piece of work and usually sits under a master contract.
Who writes the statement of work?
Often the supplier drafts it and the customer reviews. Large buyers draft their own so scope and acceptance are on their terms.
How long should a SOW be?
As long as needed to remove doubt, and no longer. Simple projects need two or three pages, and complex ones need many.
Is a SOW legally binding?
Once signed and incorporated into a contract, yes. The wording and the governing law decide the details.
What is the difference between a SOW and a scope of work?
They are often used interchangeably. A SOW normally includes more, such as pricing and acceptance.