Who this is for
General contractors, electricians, plumbers, HVAC technicians, builders, painters, decorators, handymen. Anyone billing for on-site work where materials and labor need to be itemised separately and the client needs proof of where the work was done.
What goes on a contractor invoice
Three things separate a professional contractor invoice from a back-of-the-envelope one.
1. Separate labor and materials lines. Always. Clients (and their insurers, if a claim is involved) need the split. Material lines should reference any receipts you can attach. Labor lines should describe the task in plain English: "Install 40-gallon water heater, including disconnect and disposal of old unit" rather than just "labor".
2. Job-site address. The Bill To address is the client's mailing address, often their home or office. The Ship To field doubles as the job-site address. This is critical for clients with multiple properties and essential on any insurance claim. Always include it.
3. Warranty terms in writing. Most contractor disputes are about what was promised. Putting the warranty on the invoice itself closes that loop. A common phrasing: "6-month workmanship warranty from final inspection. Materials warranty per manufacturer terms".
Mechanic's liens and pre-lien notices (US)
A handful of US states require contractors to serve a pre-lien notice early in the project (sometimes within 20 days of starting work) in order to preserve mechanic's lien rights later. California, Texas, Florida, Arizona, Nevada and Washington are the strictest; the deadlines and exact wording differ in each. Check your state contractor board before invoicing and reference the notice on the invoice if it has been served.
For commercial work, the rules tighten further. Many states require notice on every property where you have done work, not just the first one in a contract.
Common pitfalls
- No change-order documentation. If the client asked for an extra task mid-job, the invoice line should reference the change-order date and the email or signature that approved it. Verbal additions cause non-payment.
- Vague task descriptions. "Misc. plumbing" invites pushback every time. Spell out each task and the location in the building.
- No before-and-after photos referenced. Take completion photos on your phone and mention "Completion photos available on request" in the notes. Speeds disputes and pre-emptively answers warranty-claim questions.
- Sales tax mistakes on materials. In most US states, the contractor is the "consumer" of materials and tax is paid at purchase, not collected from the client. In a few states (Arizona, Hawaii, New Mexico) the contractor charges sales tax on the whole job. Know your state.
Payment terms for contractors
Most one-off residential jobs are Net 14 or due on receipt after the final walk-through. For commercial contracts, Net 30 is standard. Larger projects are commonly invoiced in stages: deposit on signing (25 to 30 percent), progress payments at agreed milestones, and final payment on completion.
For long jobs, never finish all the work before issuing the final invoice. Hold back 10 to 15 percent of the final payment until the punch list is signed off, and structure the invoice to reflect that retention.
How to use this template
- Open the contractor template.
- Fill the job-site address into the Ship To field.
- Replace placeholder line items with actual labor hours and materials.
- Adjust the warranty language in the Terms field to match what was agreed.
- Download the PDF and attach it to your email or invoicing software.