Plumbing invoice template

Last reviewed: October 2026

What goes on a plumbing invoice

Customers want three things from a plumbing invoice: why you came, what you fixed and what the parts cost. A property manager, an insurer or a home buyer may want a fourth: proof of what was installed and that it was permitted.

• Your business: name, address, phone, email and your plumbing or contractor licence number.
• Customer and job address, plus the tenant or site contact for rentals and commercial jobs.
• Invoice number, issue date and due date, and the date and time of the call.
• Problem reported and what you found: "no hot water; tank leaking at the base; heater 14 years old".
• Call-out or trip fee, and any emergency or after-hours premium, on its own line.
• Labour: hours at your rate, or the flat price per task.
• Parts and fixtures: each listed, with make and model for water heaters, softeners, pumps and fixtures.
• Disposal or haul-away of the old fixture, if you charge for it.
• Permit fee at cost with the permit number, and the inspection result.
• Sales tax where it applies, the total, payment methods, the warranty on workmanship and the manufacturer's warranty on the equipment.

How to fill in this plumbing invoice template

1. Add your business and licence numberEnter your business name, address and email; put your licence number (or your EIN, with the licence in the notes) in the tax ID field under your address.
2. Add the customer and the problemEnter the customer under Bill to. In Notes, record the job address if different, what was reported and what you found.
3. Add the lines in orderCall-out or trip fee, then labour (hours × rate, or 1 × the flat price), then each part and fixture, then disposal and the permit fee at cost with its number.
4. Set sales tax per lineLeave Tax % at 0 where your state does not tax the line; enter your combined state and local rate on lines it does tax, which may be materials only or the whole job.
5. Add warranty and termsPut your workmanship warranty, the manufacturer's equipment warranty and the due date in Terms.
6. Sign in to issueSign in to keep the invoice: it gets the next number in your series and the customer's balance is tracked. Issuing and sending need the Sales module.

Example: an emergency water heater replacement

Rivera Plumbing & Heating in Phoenix took a Saturday call from Sandra Okafor: no hot water, and the tank leaking at the base. The plumber replaced the 40-gallon gas water heater the same day under a city permit, took the old unit for recycling, and invoiced on completion.

1. Licence number: in Arizona prefixed "ROC" on bids, estimates and documents sent to customers.
2. Due on completion, as agreed when the customer booked the emergency visit.
3. Permit number, so the customer can show the replacement was permitted and inspected.
4. Call-out, labour, equipment and permit as separate lines; the emergency premium is in the call-out the customer agreed to.
5. Total with no sales tax line: in Arizona a repair or replacement contractor pays the tax when buying materials.
6. Problem found, disposal and the warranty split between your workmanship and the manufacturer's tank warranty.

Call-out fees, emergency rates and flat-rate pricing

A flat-rate drain job

Flat-rate pricing is common for drains and fixture repairs because the customer approves one price before work starts. For a kitchen drain cleared by cable and a bathroom faucet cartridge replaced on a weekday visit, the invoice shows the trip fee and two price-book tasks, with no hours at all.

Water heaters, permits and inspections

Water heater replacements, new supply or drain lines, gas piping, backflow devices and repiping usually need a permit from the city or county, and an inspection before the job is closed. The invoice is where the homeowner keeps the proof.

• Permit number and fee on their own line, at cost. If you charge for the time spent pulling the permit and meeting the inspector, show a separate permit-handling fee.
• Inspection result in the notes, or "final inspection scheduled for 9 October" if it is still pending, with what happens if it fails.
• Equipment record: make, model, serial number, capacity, fuel and install date of the water heater, softener, pump or tankless unit. Manufacturers ask for proof of purchase and installation date for warranty claims, and many require registration soon after installation.
• Code items added to bring the installation up to current code, such as an expansion tank, a new temperature and pressure relief discharge line or seismic straps, each on its own line with the reason.
• Disposal of the old unit: "old heater removed and taken for recycling", with a fee if you charge one.
• Warranty split: your workmanship guarantee (for example 12 months) and the manufacturer's tank and parts warranty, which you do not give.

Sales tax on plumbing labour and materials

Plumbing on a building is usually taxed as contracting on real property, not as a retail sale, so the answer to "do I charge sales tax?" depends on the state, whether the property is residential, and whether the job is a repair, a replacement or a new installation.

This is why the Phoenix invoice above has no tax line: replacing a water heater is a replacement under Arizona's MRRA rules, and Rivera paid tax on the heater when it bought it. The same replacement in Seattle would carry Washington retail sales tax on the whole $1,302.50, and in New York it would be tax-free only with a signed capital improvement certificate.

Licence numbers, deposits and lien rights

Texas is the clearest case that the invoice itself must carry the licence details; elsewhere, putting the number on the invoice is still the simplest way to prove who did the work.

Deposits on bigger jobs

Repipes, sewer line replacements and tankless conversions are usually billed with a deposit and a final invoice. In California the down payment on a home improvement contract may not exceed $1,000 or 10% of the contract price, whichever is less, and later payments may not run ahead of the work done (Bus. & Prof. Code §7159.5). Show the deposit on the final invoice as a payment received so the full job price stays visible.

Mechanic's liens and preliminary notices

• Arizona: everyone except wage labourers, including a plumber hired directly by the owner, serves a preliminary 20-day notice to preserve lien rights; the lien is recorded within 120 days after completion, or 60 days after a notice of completion is recorded (A.R.S. §§33-992.01, 33-993).
• California: a contractor hired by the owner gives a preliminary notice only to the construction lender, if any, and records the lien within 90 days after completion, or 60 days after a recorded notice of completion (Civil Code §§8200, 8204, 8412).

The deadlines run from when you start or finish work, not from when the invoice falls overdue, so diarise them at the start of any job big enough to matter.

Payment terms, late fees and 1099-NEC

• Homeowners usually pay on completion, by card, check or bank transfer; say so on the estimate and in the terms.
• Property managers, builders and businesses usually get Net 15 or Net 30 on an account. Ask for their PO or work order number and put it on the invoice.
• Late fees need to be agreed before the work, in the estimate or service agreement, and repeated in the invoice terms. State law limits interest and fees, particularly on consumer debts. Where a California contract sets no rate, a debt carries 10% a year after breach (Civil Code §3289).
• Insurance jobs: the policyholder, not the insurer, is usually your customer. Invoice them, with enough detail (cause, photos, parts) for their claim.

A business that pays you $2,000 or more in a year for services files Form 1099-NEC for tax years beginning after 2025 (the threshold was $600 and will be adjusted for inflation from 2027), so commercial clients and property managers will ask for your Form W-9. Homeowners paying for work on their own home do not file one, and card or app payments are reported on Form 1099-K by the processor instead.

United Kingdom and India

United Kingdom. Anyone working on gas appliances, gas water heaters and boilers included, must be on the Gas Safe Register; put the registration number on invoices for gas work. Plumbers register for VAT once taxable turnover passes £90,000 in 12 months and then charge 20%. Installing water and heating systems for a building contractor falls under the Construction Industry Scheme, and between VAT-registered businesses in a CIS chain the domestic reverse charge applies; private householders are outside both. Installing a heat pump in a home is zero-rated for VAT until 31 March 2027, then 5%.

India. Plumbing repair and installation services are taxed under GST, generally at 18%; a plumber must register once aggregate turnover exceeds ₹20 lakh (₹10 lakh in special category states). A GST invoice shows your GSTIN, the SAC, and CGST + SGST for work in your own state or IGST otherwise. Use the GST invoice generator for India.

Mistakes to avoid

• An emergency premium the customer was not told about. Quote it on the phone, note who agreed and when, and show it as its own line.
• "Parts, $940." List each part and fixture; a single parts total invites a dispute and helps nobody with a warranty claim.
• No make, model or serial for the water heater. The customer needs them for the manufacturer's warranty and you need them for recalls.
• Charging sales tax on labour where it is not due, or skipping it where it is. In some states you, not the customer, owe the tax on the materials you bought.
• Permit fees with a hidden markup. Bill at cost, or show a separate permit-handling fee.
• Changing the invoice after the customer pays. Issue a credit note for a reduction and a new invoice for extra work.
• Missing lien deadlines on larger jobs. Where your state requires a preliminary notice, the clock starts when you first deliver work or materials, not when the invoice goes unpaid.

Plumbing estimate vs work order vs invoice vs receipt

Price larger jobs with the estimate generator first; the accepted lines become the invoice, so what the customer approved and what they are billed match word for word.

Key terms

Call-out fee

A fixed charge for attending a job, separate from the labour to fix it.

Flat-rate pricing

A fixed price per task from a price book, approved by the customer before work starts.

MRRA

Arizona's category of maintenance, repair, replacement or alteration contracts, not taxed under prime contracting.

Capital improvement

In New York, a permanent addition or replacement that adds value, such as installing a water heater; exempt from sales tax with Form ST-124.

Preliminary 20-day notice

The notice Arizona and California use to preserve mechanic's lien rights, served within 20 days of first furnishing work.

Gas Safe Register

The UK register every engineer working on gas appliances must belong to.

Questions people ask