Free Plumbing Invoice Template (2026) — Service Calls, Repairs & New Installs

Plumbing invoices are not one-size-fits-all. A $150 service call to clear a slow drain has almost nothing in common with a $9,000 water heater and repipe job that requires a permit, a fixture schedule, and documented serial numbers. Using a generic invoice template for either one leaves money on the table — and in a dispute, it leaves you with no documentation to stand on.

This guide covers what plumbing invoices need to include, walks through a complete ready-to-use template, and explains how to handle the situations that trip up most plumbing contractors: permit documentation, fixture warranties, and emergency rate surcharges.

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Why Plumbing Invoices Are Different

Plumbing work spans a wider range of job types than almost any other trade. A plumber might run three service calls before noon — a toilet replacement, a gas line leak, and a clogged main — and then spend the afternoon rough-in on a bathroom addition. Each of those jobs has different documentation requirements, different material specs, and in many cases different legal requirements for what has to appear on the invoice.

General contractor invoice templates do not account for any of this. They give you line items for labor and materials, a total, and a payment terms field. That is fine for drywall. It is not fine for a water heater replacement where the manufacturer warranty requires a documented serial number, or a fixture install where the homeowner will call you in 18 months claiming the faucet you installed was a different brand than what they chose.

The material specificity is the main difference. Plumbing materials carry manufacturer warranties, have model-specific installation requirements, and in the case of anything connected to potable water, are subject to code compliance inspections. What you installed needs to be on the invoice in enough detail that anyone reading it later — a homeowner, a warranty administrator, a building inspector, or a judge — can verify exactly what was done.

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What a Plumbing Invoice Must Include

Beyond standard invoice fields, plumbing invoices need several items that other trades can skip.

Contractor License Number and Bond Number

Every state that requires plumbing contractor licensing — which is most of them — requires that license number to appear on your invoices and contracts. Bond number is also required in most states for licensed plumbers. If you are working without these on your paperwork and a client files a complaint, missing credentials documentation is the first thing a licensing board or arbitrator will notice. It weakens every other position you hold in the dispute.

Fixture Make, Model, and Color

Any fixture you supply and install — faucets, toilets, shower valves, garbage disposals, water heaters — needs to be documented by make, model number, and color or finish. This protects you in two directions.

First, manufacturer warranties are voided if you cannot prove the correct product was installed. If a Kohler faucet fails at 18 months and the homeowner files a warranty claim, Kohler is going to want the model number. "Delta faucet, chrome" is not enough — they need the model number to confirm the product is covered and that it was properly installed per that model's spec sheet.

Second, homeowners sometimes claim after the fact that you installed a different fixture than what they selected. If your invoice shows the exact model number they approved in writing, that dispute resolves itself.

Pipe Material Specifications

For any repipe, new rough-in, or repair involving pipe, document the material and size. "Replaced section of pipe" is not a line item — "Replaced 6 LF 3/4-inch Type L copper supply line" is. This matters for:

• Inspection documentation when a permit is involved
• Warranty claims if a fitting fails
• Future plumbers who need to understand what is in the wall
• Insurance claims involving water damage where the pipe material is relevant

  Common pipe materials to specify: Type L copper, Type M copper, CPVC, PEX-A, PEX-B, PVC (schedule and pressure rating), cast iron (for drain lines), galvanized steel (replacement work). Always include diameter.

  Water Heater Serial Number

  If you replace or install a water heater, the serial number must be on the invoice. Every major manufacturer — Rheem, A.O. Smith, Bradford White, State, Navien — embeds the manufacture date in the serial number, and warranty registration requires it. Without the serial number documented on your invoice:

  • The homeowner cannot register the warranty
  • You cannot prove what unit you installed if there is a callback
  • The permit record may be incomplete depending on your jurisdiction

    The serial number is on the rating plate, usually on the upper portion of the tank or on the front of a tankless unit. Takes ten seconds to document. Do it before you leave the job.

    Permit Number (When Required)

    Permit documentation is covered in detail below, but the permit number belongs on the invoice as a line item when a permit was pulled.

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    Plumbing Invoice Template

    ```

    PLUMBING INVOICE

    [Company Name] | License #: _____ | Bond #: _____

    [Address] | [Phone] | [Email]

    Invoice #: _____ | Date: __________ | Due: __________

    Customer: _______________ | Property Address: _______________

    Permit #: _____ (if applicable)

    SERVICES PERFORMED:

    [ ] Service call / diagnostic $______

    [ ] ___________________________ $______

    [ ] ___________________________ $______

    MATERIALS & PARTS:

    Item: __________________ | Model #: __________ | Qty: ___ | Price: $______

    Item: __________________ | Model #: __________ | Qty: ___ | Price: $______

    Materials Subtotal: $______

    LABOR:

    Plumber: _______ | Hours: ___ | Rate: $___/hr $______

    Helper: _______ | Hours: ___ | Rate: $___/hr $______

    Labor Subtotal: $______

    ADDITIONAL CHARGES:

    Emergency/after-hours surcharge: $______

    Disposal/haul-away: $______

    Subtotal: $______

    Tax (___%) : $______

    TOTAL DUE: $______

    Payment due: Upon completion / Net 30

    Payment methods: Check | Credit Card | Zelle | Bank Transfer

    WARRANTY: Parts: __ yr manufacturer | Labor: 1 year from service date

    ```

    Notes on Completing This Template Services performed checkboxes. Use specific language for each line item. "Replaced wax ring and reset toilet — Kohler Cimarron, White, Model K-3609" is better than "toilet repair." The more specific the service description, the harder it is for a client to dispute what was done or claim you did not complete the scope. Materials and model numbers. Write the full model number as it appears on the product label or packaging, not a shortened version. "Moen Arbor 7594ESRS" is better than "Moen pull-down faucet." If you are using job-site supply house materials that do not have consumer-facing model numbers, document the supply house part number. Labor breakdown. List the lead plumber and any helpers separately with their rates. This is not just for client transparency — it is the documentation you need if a client disputes labor hours. If you used time-and-materials billing, the individual rates and hours need to be visible. Tax. In most states, labor for plumbing repairs is not taxable but materials are. Know your state's rules and apply tax correctly — applying it to the full invoice total in a state that only taxes materials creates overcharges that clients will dispute. Warranty language. The template includes a standard one-year labor warranty. Keep it consistent across every invoice. If you deviate from your standard warranty terms on a specific job (shorter for an unusual repair, longer for a premium install), note it explicitly. "Labor warranty: 90 days — repair to existing cast iron drain, older than 40 years" is acceptable if both parties understand it going in.

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    When to Include a Permit Number

    The permit question comes up constantly in plumbing because some contractors skip permits to save time and money. That is a mistake that costs far more than the permit when something goes wrong. Here is the clear breakdown of when permits are required: Always requires a permit:

    • Water heater replacement (in virtually all jurisdictions)
    • New fixture installation (adding a bathroom, moving a toilet, adding a sink)
    • Sewer line replacement or significant repair
    • Gas line work (new lines, rerouting existing)
    • Repipe of supply lines (partial or whole house)
    • Any rough-in for new construction or addition Usually does not require a permit:
      • Like-for-like faucet or valve replacement without moving supply lines
      • Clearing a drain clog
      • Replacing a garbage disposal with a unit of the same electrical configuration
      • Minor leak repair on an accessible pipe section

        When in doubt, pull the permit. The permit fee for a water heater is typically $50–$150. The cost of a failed inspection, a homeowner insurance claim denied because unpermitted work was discovered, or a licensing board complaint is orders of magnitude higher.

        When a permit is pulled, the permit number belongs on the invoice and in your job file. The inspector's sign-off date should also be recorded — either on the invoice or in a separate job note that you keep with the invoice record.

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        How to Handle Emergency and After-Hours Plumbing Pricing

        Emergency plumbing — a burst pipe at 11 PM, a sewer backup on a Sunday morning, a gas leak on a holiday — is priced differently from standard service calls, and that pricing needs to be on the invoice in a way that stands up to a client who experiences sticker shock after the fact.

        Set Your Emergency Rate Before the Job, Not After

        If you receive an emergency call, state the emergency rate before you dispatch. "Our after-hours rate is $175/hr with a 2-hour minimum plus a $150 emergency dispatch fee" needs to be communicated verbally before the client says yes, and then confirmed in writing — even a text message confirmation works. A client who agrees to emergency pricing in the moment and then refuses to pay it when the invoice arrives is a problem, but it is a manageable problem if you have documentation of the agreement.

        Structure the Emergency Surcharge as a Separate Line Item

        Do not hide the emergency premium inside a higher labor rate without disclosing it. If your standard rate is $125/hr and your after-hours rate is $175/hr, list it as:

        ```

        Standard labor rate: $125/hr × 2 hrs = $250

        After-hours surcharge: $50/hr × 2 hrs = $100

        Emergency dispatch fee: $150

        ```

        This structure is more transparent than just showing "$175/hr" without explanation, and it protects you if a client claims the rate was not disclosed. The breakdown makes clear what they are paying for.

        Common Emergency Surcharge Structures

        There is no industry standard, but these structures are common among established plumbing contractors:

        • Flat dispatch fee ($100–$250) plus standard or slightly elevated hourly rate
        • Multiplier on standard rate (1.5× for after-hours on weeknights, 2× for weekend nights and holidays)
        • Minimum charge (2-hour minimum for any emergency call regardless of actual time on site)

          Whatever structure you use, it should be consistent, disclosed upfront, and itemized on the invoice. Inconsistent emergency pricing is a common trigger for chargebacks and complaints.

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          Go Digital: Stop Chasing Checks After Every Service Call

          Paper invoices and emailed PDFs have the same problem: the payment step is completely disconnected from the invoice. You finish a water heater replacement at 4:30 PM, hand the homeowner a paper invoice, and then spend the next ten days calling about a check. Meanwhile your cash flow is sitting in someone's kitchen drawer. Ontrakt is invoice software built specifically for plumbing and other trade contractors. Every invoice includes a payment link — clients pay by card or ACH directly from the invoice, no check required. The invoice is generated from your estimate automatically, so line items, model numbers, and labor rates carry over without retyping. You can track which invoices are paid, overdue, or opened, and send automatic reminders without lifting a finger.

          Plumbing contractors who switch from paper or PDF invoicing to digital invoicing with payment links typically cut their average payment time from 18–25 days down to under 5. On a business doing $500,000 a year in plumbing work, that cash flow improvement is worth more than any single efficiency you can add to operations.

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          Three Invoice Mistakes That Cause Plumbing Payment Disputes 1. No permit documentation on permitted work. A homeowner who later tries to sell their home and discovers unpermitted plumbing work will come back to you. If your invoice shows a permit number and inspector sign-off, you are covered. If it does not, you may be on the hook for rework or remediation. Pull the permit and put the number on the invoice. 2. No serial number on replaced equipment. The most common callback after a water heater replacement is a warranty issue. If you do not have the serial number documented, you cannot process the claim, you cannot prove what you installed, and the homeowner has no way to register their warranty. The serial number takes ten seconds. There is no excuse to leave without it. 3. Vague materials listed without model numbers. "Installed new faucet — $285" is a payment dispute waiting to happen. The client who spent 45 minutes on the Moen website selecting a specific finish will claim you installed the wrong one if you cannot prove otherwise. The model number on the invoice is your proof.

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          What to Do Before You Send

          Run through this checklist before sending any plumbing invoice:

          • License number on the invoice header
          • Bond number on the invoice header
          • Property address listed separately from billing address
          • Each material line item includes make, model number, quantity, and unit price
          • Water heater serial number documented (if applicable)
          • Permit number included (if a permit was pulled)
          • Pipe material and size specified for any pipe work
          • Emergency surcharge itemized separately (if applicable)
          • Warranty terms stated clearly
          • Payment methods and due date listed

            A plumbing invoice that includes all of this is not just better documentation — it signals to your clients that you are a professional operation, not a one-truck operator who might disappear after the job. That perception is part of why established plumbing contractors can charge more and still win the job.