Use the five-part test
Ask: what was supplied, for which project, during what period, in what quantity, and under which agreed rate or milestone? Add a reference to an approved change or supporting document when needed.
Rewrite vague lines
“Plumbing” is vague. “Replace kitchen sink trap — labor and one PVC trap, completed 12 August” gives the customer something to check. “Consulting — $1,200” is weaker than “Website accessibility review, 6 hours, report delivered 12 August — $1,200.” These are illustrative examples.
Keep types distinguishable
Separate labor, materials, equipment, travel, and approved changes when the agreement expects it. Use quantities and units consistently, and do not invent detail that your records cannot support.
A line-item review checklist
Read each line as if you were the customer. Could you identify the work, the project, the period, the quantity, and the amount without opening another document? If not, add the missing fact or attach the supporting record.