CIS Invoice Template for Plumbers UK
A free, HMRC-compliant CIS invoice template for UK plumbers. Generate and send professional CIS invoices with automatic deduction calculations — no spreadsheets, no manual maths.
📄 Example CIS Invoice — Plumber
| Item | Amount |
|---|---|
| Labour — Plumbing and heating works | £800 |
| Materials — Copper pipe, fittings, valves | Variable |
| CIS Deduction (20% on labour) | −£XX.XX |
| Amount Due | £XXX.XX |
FlashBill creates this invoice automatically.
Enter your labour and materials, select your CIS rate — FlashBill calculates the deduction and generates a professional PDF. Free to start.
What Should a CIS Invoice for a Plumber Include?
A CIS invoice for plumbers must meet HMRC's requirements. Here's what every CIS invoice must show:
- Your name and address (or business name)
- Your UTR number (10-digit Unique Taxpayer Reference)
- Invoice number (sequential, for your records)
- Invoice date and payment due date
- Description of work — e.g., "First Fix Plumbing — New Build Plot 12"
- Labour amount separately from materials
- CIS deduction rate and amount (20%, 30%, or 0%)
- Net payable amount (what the contractor actually pays you)
- VAT number and VAT amount (if VAT registered)
CIS and Plumber Work: What You Need to Know
Plumbing is a core CIS trade. Most plumbers working on construction sites or new builds will be subcontractors under CIS. All labour payments must show the correct CIS deduction.
Plumbers typically carry out hot and cold water systems, central heating installation, boiler fitting, pipe installation, bathroom fitting, and drainage works. Common contractors who engage plumbers as subcontractors include house builders, property developers, housing associations, commercial fit-out contractors, and maintenance companies.
CIS Deduction Rates for Plumbers
The deduction rate applied to your labour payments depends on your CIS registration status:
- 0% — Gross payment status (you've applied and been approved by HMRC)
- 20% — Registered CIS subcontractor (standard rate)
- 30% — Unregistered subcontractor (higher rate — register to reduce this)
Frequently Asked Questions
Do plumbers need to register for CIS?
Yes, if you carry out plumbing work as a subcontractor for a contractor in the construction industry. You should register with HMRC as a CIS subcontractor. Without registration, contractors will deduct 30% instead of 20%.
Do CIS deductions apply to materials on a plumbing invoice?
No. CIS deductions only apply to the labour element of your invoice. If you supply materials as well as labour, split them on the invoice — the contractor will only deduct CIS from the labour amount.
Can plumbers get gross payment status?
Yes. If you have a good compliance record and meet HMRC's turnover threshold (£30,000/year for sole traders), you can apply for gross payment status and receive payments without CIS deductions.
Stop Using Spreadsheets — Use FlashBill Instead
Creating CIS invoices manually is time-consuming and easy to get wrong. FlashBill is designed specifically for UK plumbers — enter your job details, select your CIS rate, and the invoice is calculated and formatted correctly in seconds. Send it by email or share a payment link directly.