Plumber invoice template
Plumbing bills are rarely one number. There is the callout, the hour or two it actually took, the part you had on the van, and sometimes a rate that doubled because it was Sunday. This template itemises all of it, and covers the VAT rule that catches heating engineers out: installing energy-saving materials in a home is currently zero-rated.
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Invoice details
Your business
Adds your VAT number below, plus VAT columns and a VAT section.
Stored on your device only and embedded in the PDF. PNG or JPG, under 1MB.
Bill to (your client)
VAT
CIS (construction)
Domestic reverse charge
Appearance
Items
Discount, deposit & payment
Receiving a deposit can create a VAT tax point. Check HMRC guidance if unsure.
Your business name
Invoice
INV-0001
Bill to
Client name
- Invoice date
- 01/10/2026
| Description | Qty | Unit | VAT | Net |
|---|---|---|---|---|
| — | 1 | £0.00 | 20% | £0.00 |
- Net total
- £0.00
- VAT 20%
- £0.00
- Total VAT
- £0.00
- Total
- £0.00
Callouts, minimum charges and out-of-hours rates
The callout is a charge for turning up, and it should look like one on the invoice — its own line, at the rate you quoted on the phone. Most plumbers roll the first hour into it; if you do, say so in the description ("Emergency callout incl. first hour — £90") so the customer doesn't read the next labour line as being billed twice.
Premium rates need to be visible rather than implied. An out-of-hours or bank-holiday rate belongs on its own line with the multiplier stated, and any minimum charge should be named as a minimum charge. Disputes almost always come from a customer who agreed to "£60 an hour" on the phone and received an invoice where the arithmetic doesn't obviously start from £60. Agreeing a figure before you set off? Send a quote rather than an estimate if you can commit to it.
Parts, and what you charge for them
List parts separately from labour — valves, a pump, a cylinder, fittings — with enough description that a customer could look one up. Most plumbers charge parts at trade plus a margin, which is entirely normal and doesn't need justifying on the invoice; what causes friction is a single "materials" line for £340 with no breakdown.
If a part carries a manufacturer's warranty, note the term and the part number in the invoice notes. It's the document the customer will still have in two years when the pump fails, and it saves you reconstructing what you fitted. On a CIS job, this same split is what determines the deduction.
Heat pumps, solar and insulation are zero-rated until 2027
Worth knowing before you quote. Installing qualifying energy-saving materials in residential accommodation in Great Britain is zero-rated for VAT between 1 May 2023 and 31 March 2027, reverting to the reduced 5% rate on 1 April 2027. Air source and ground source heat pumps, solar panels, insulation, draught stripping and certain heating controls are on the qualifying list — see VAT Notice 708/6.
An ordinary combi swap is not on the list and stays standard-rated at 20%. So a heat pump install and a boiler replacement in the same street carry different VAT, which is exactly the sort of thing to get right at quote stage rather than discover at invoicing. If you're under the £90,000 threshold and not registered, none of it applies — you simply bill your price.
When a contractor is paying you
Installing heating, water supply, drainage or sanitation is a construction operation, so a plumber subcontracting to a developer, main contractor or housebuilder is inside CIS. The contractor deducts 20% (registered and verified), 30% (unverified) or 0% (gross payment status) from the labour only — the cylinder you supplied and the VAT are both outside the calculation. GOV.UK covers what you must do as a CIS subcontractor.
Where you're both VAT registered, the same invoice usually carries the domestic reverse charge as well: VAT shown, not added, customer accounts for it. None of this touches the emergency callout you did for a homeowner this morning — a private customer isn't a contractor, so that's an ordinary invoice.
A typical plumber invoice
Example line items you might add:
- Emergency callout incl. first hour — fixed £90
- Labour — additional 2 hours @ £55
- Parts — thermostatic mixing valve & fittings (12-mth warranty)
- Out-of-hours premium (Sunday, 1.5×) — £45
Frequently asked questions
How do plumbers invoice for a callout?
As its own line at the rate quoted on the phone, stating whether the first hour is included. Additional labour, parts and any out-of-hours premium then follow as separate lines so the total is traceable back to what was agreed.
Is VAT on a heat pump installation really 0%?
Yes — installing qualifying energy-saving materials in residential accommodation in Great Britain is zero-rated until 31 March 2027, then moves to the reduced 5% rate. Heat pumps, solar panels and insulation qualify; a standard boiler replacement does not and stays at 20%.
Can I charge a markup on parts?
Yes, and it is standard practice. What causes disputes is presentation, not margin — an itemised parts list with recognisable descriptions rarely gets queried, while a single unexplained materials figure usually does.
Does a plumber need to apply CIS?
Only when a contractor pays you for construction work such as a heating or drainage installation on a site. The deduction comes off labour only. A repair billed directly to a homeowner or private landlord has no CIS in it.
Should the invoice mention the warranty on a part?
It is worth adding to the notes with the part number and term. The invoice is the document the customer keeps, so it is where they will look when a component fails inside its warranty period.