Plumbing business forms checklist: estimates, agreements, invoices
Short answer: A plumbing company needs six forms: a customer intake, an estimate, a service agreement, an invoice, a job completion report and a warranty statement. Use the same job reference across all of them. The estimate sets the price, the agreement sets the terms, the report records the work and the invoice collects payment.
The estimate and the service agreement
The estimate gives the customer a priced scope: labor, materials, permits and any disposal or after-hours fees. State what is not included, such as repairs to hidden damage found after opening a wall. Add an expiry date so material price swings do not erase your margin.
The service agreement covers the terms that apply to the job or to a recurring relationship: payment, change orders, access, responsibilities and limits of liability. A signed agreement turns an informal handshake into something you can rely on.
Change orders and warranty
Plumbing jobs change once walls are open. A short change order form records the extra work, the extra cost and the customer's approval before you proceed. It is the cheapest dispute prevention you will use.
State your warranty on labor and on parts in plain language, including what voids it. Put it on the invoice or a warranty statement so the customer has it in writing.
Completion report and invoice
The completion report records the problem found, what was repaired or replaced, test results and recommendations. If you recommended a repair the customer declined, note it and have them acknowledge it.
The invoice should match the estimate and any change orders. Show the job address, the dates, line items, total, payment methods and due date, and send it the day the job finishes.
Price before you standardise
Forms cannot rescue a price that is too low. Work out your loaded labor rate, overhead per billable hour and target margin; the free job price calculator on this site applies that method.
Then use the same forms on every call. Consistent paperwork makes quoting faster and training easier, and it is what a customer, insurer or inspector expects to see.
Frequently asked questions
Do I need a written agreement for small repairs?
A signed estimate stating scope, price and payment terms is usually enough for a small job. Use a fuller agreement for larger or recurring work.
What is a change order?
A short signed note recording work added after the original estimate, its price and the customer's approval.
Are these templates editable?
Yes. They are Word and PDF files with a header for your company name, logo and license number.
