Writing Exclusion Lists That Protect Margin

Exclusion lists make clients uncomfortable when they read like legal traps. Written plainly, they prevent the slow margin loss that kills fixed-price service businesses.

Start from past disputes

List the last five jobs where you worked extra hours without charging. What tasks crept in? Travel beyond a radius, disposal fees, after-hours access, revision rounds, specialist sub-contractors — these belong in exclusions until you deliberately bundle them.

Use plain language

“Removal and disposal of existing fixtures” is clearer than “ancillary works as defined in section 4.” Your client should understand the boundary without calling you.

Pair every inclusion with a limit

“Including up to two revision rounds” defines an inclusion. Without the limit, “revisions included” becomes unlimited. The exclusion is implicit in the cap, but state both for clarity.

Show the add-on path

When something is excluded, say how the client can purchase it: “Additional site visits billed at AUD 180 per visit, confirmed in writing before attendance.” This turns exclusions from rejection into choice.

Review quarterly

Job types shift. An exclusion list written for residential work may fail on commercial contracts. Schedule a brief review after busy seasons when memory of scope creep is fresh.

Exclusion lists are unglamorous work. They are also where many advisory engagements pay for themselves within a single prevented dispute.