Plumber invoice wording and payment terms

Copy-and-paste blocks

• Emergency call-out line

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  Emergency call-out and first hour on site — attendance, fault diagnosis and initial labour. Additional labour charged per hour thereafter.

• Labour line

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  Plumbing labour (per hour) — time on site after the call-out period, rounded to the nearest 30 minutes.

• Parts line

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  Parts and materials supplied — itemised above at the price charged to you plus a 15% handling allowance. Receipts available on request.

• Payment terms

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  Payment is due within 14 days of the invoice date by bank transfer to the account shown below. Please use the invoice number as your payment reference.

• Guarantee wording

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  All workmanship is guaranteed for 12 months from the date of completion. Parts carry the manufacturer's warranty. Gas work carried out under Gas Safe registration.

Getting the terms to stick

Domestic plumbing invoices are usually settled within a fortnight. If nothing lands by day 14, a short text with the invoice number and total works better than another email.

If you don't state a payment period, the statutory default of 30 days applies — and you can charge statutory interest plus a fixed recovery cost on a commercial debt once it is late. Putting your terms on every invoice is what makes them enforceable without argument.

Common questions

Should a plumber charge a call-out fee on the invoice?

Yes — show it as its own line and state what it covers. A call-out that quietly includes the first hour of labour is the single most common cause of a queried plumbing invoice.

Do I have to itemise parts on a plumbing invoice?

There is no legal requirement to break parts down individually, but it is far easier to defend a bill that lists a pump, a valve and pipe than one that says "materials".

What should a plumber's payment terms be?

14 days is the norm for domestic work and 30 days for letting agents or commercial customers. Whatever you pick, put it in writing on the invoice — otherwise the statutory default of 30 days applies.