Invoice-led
CIS Reverse Charge Invoice Checker
Check whether a builder invoice has the obvious CIS and domestic reverse charge details you should look at.
Result
Probably fine, unless your gut says otherwise.
This is a practical sense-check, not tax advice. HMRC and your accountant are the source of truth.
What it is for
Built for real merchant paperwork, not generic accounting.
A quick sense-check for invoices involving construction services, CIS and VAT domestic reverse charge wording.
Flags missing reverse charge wording, VAT treatment and CIS context.
Designed for UK building and construction work.
Use it before sending paperwork to your accountant.
Guidance note
CIS and domestic reverse charge invoice checks
Checked against GOV.UK guidance on 14 June 2026.
For UK building and construction services, HMRC says the VAT domestic reverse charge is used for most standard and reduced-rate services that are reported within CIS and supplied between UK VAT-registered businesses. A practical invoice check should confirm the work is CIS construction work, the customer and supplier context, the VAT treatment, reverse charge wording, and enough invoice detail for an accountant to decide what to do next.
The work is construction work under CIS, not materials-only supply or an excluded service.
The parties and project context make sense for a VAT domestic reverse charge review.
The invoice shows VAT treatment clearly instead of charging VAT as a normal line when reverse charge wording is expected.
Labour, materials, invoice date, VAT number and supplier/customer details are clear enough for accountant review.
What happens next
If it looks odd, send the invoice.
You get a practical checklist result and a prompt to forward anything unclear to your accountant.
This is not tax advice. Check HMRC guidance or your accountant before changing how you invoice.
Send the invoice