CIS, VAT and MTD, 29 October 2026
Reverse charge invoice wording, with a template
A reverse charge invoice must carry the words "reverse charge", show all the usual VAT invoice details, and state the VAT the customer must account for, or the rate, without adding it to the total. HMRC accepts wording such as "Reverse charge: VAT Act 1994 Section 55A applies" or "Reverse charge: Customer to pay the VAT to HMRC".
When must the invoice use the reverse charge?
When four things are true. You're VAT-registered in the UK, your customer is VAT-registered in the UK, the payment is reported through the Construction Industry Scheme, and the service is a standard-rated or reduced-rated building service. The rule has applied to invoices with a tax point on or after 1 March 2021.
Most building work counts: construction, repairs, extensions, demolition, installing heating, lighting, air conditioning, drainage, power and fire protection systems, painting and decorating, scaffolding and site clearance. Some services stay outside when supplied on their own, including architects' and surveyors' work, signwriting, installing burglar alarms and CCTV, and installing seating, blinds and shutters.
Put the reverse charge wording on the invoice, show the VAT the customer accounts for, and leave it out of the total.
Keep their letter on file and issue a normal VAT invoice.
Zero-rated work, such as new-build housing or energy-saving materials in a home until 31 March 2027, is invoiced at 0% without it.
Domestic customers, non-registered customers and non-CIS payments get a normal VAT invoice.
If you aren't VAT-registered you don't charge VAT at all, so there's nothing to reverse.
What exactly must the invoice say?
HMRC's technical guide sets three requirements. Show all the information a normal VAT invoice needs. Make clear that the domestic reverse charge applies, and the VAT regulations say the invoice must include the reference "reverse charge". State the VAT due under the reverse charge, or the rate if you can't show the amount, without adding it to what you charge.
HMRC gives these as acceptable wording:
- VAT Act 1994 Section 55A applies
- S55A VATA 94 applies
- Customer to pay the VAT to HMRC
If your accounting software can't show the reverse charge VAT, HMRC says to add wording such as "customer to account to HMRC" for the reverse charge.
Your business name Your address VAT registration number: your VAT number INVOICE invoice number Invoice date and tax point: date To: customer business name customer address Customer VAT number: customer VAT number Job: site address and short description Labour: description £labour, net Materials: description £materials, net Total (excluding VAT) £net total VAT at 20%: £VAT amount Reverse charge: Customer to pay the VAT to HMRC. VAT Act 1994 Section 55A applies. Amount due (before any CIS deduction): £net total CIS: labour £labour, materials £materials Payment terms: terms Bank: account name, sort code, account number
How do the figures work on a real invoice?
Take an electrical subcontractor fitting out a café for a VAT-registered main contractor, under CIS, at 20%.
Reverse charge invoice for a £4,800 first and second fix
Electrical subbie, registered for CIS at the standard 20% rate, invoices a VAT-registered contractor.
| Labourfirst and second fix | £3,600 |
| Materialscable, boards, accessories | £1,200 |
| Net invoice total£3,600 + £1,200 | £4,800 |
| VAT the contractor accounts for£4,800 × 20%, shown but not charged | £960 |
| CIS deduction£3,600 labour × 20% | £720 |
| Contractor pays the subbie£4,800 − £720 | £4,080 |
On a normal invoice the same job would have totalled £5,760 with VAT. Under the reverse charge the subbie never handles the £960, and that changes cash flow. If you used to keep VAT receipts in the bank until the quarter end, that cushion goes. HMRC's guidance for suppliers asks you to decide whether to move to monthly VAT returns, because you'll be reclaiming VAT on materials without collecting any on your sales.
What if your customer is an end user?
Charge VAT normally. An end user is a VAT- and CIS-registered business that doesn't sell the construction work on, such as a property company having its own offices refitted. An intermediary supplier is one connected to an end user, for example in the same corporate group. Either can tell you in writing, and then the reverse charge doesn't apply.
HMRC suggests wording for that notice. If you work for developers or landlords who use their own building, it's worth asking them to send it.
We are an end user for the purposes of section 55A VAT Act 1994 reverse charge for building and construction services. Please issue us with a normal VAT invoice, with VAT charged at the appropriate rate. We will not account for the reverse charge. Customer business name Signed, name and date
What about invoices with mixed work?
If any service on the invoice falls under the reverse charge, the whole invoice normally does, including goods supplied with the service. The exception is the 5% disregard: if the reverse charge part is 5% or less of the whole supply, you can ignore it. HMRC says to agree that with the customer at the start of the contract, based on overall contract values, not invoice by invoice.
Zero-rated work stays outside. Standard-rated items included in a zero-rated supply don't trigger the reverse charge, so a new-build housing contract or a heat pump install in a home goes out at 0% without it. See VAT on heat pumps, solar and EV chargers for when that changes on 1 April 2027.
How do you correct a mistake?
HMRC says errors should be corrected as soon as possible. Where you issue a credit note, include the reduction in value on the VAT return for the period the credit note is issued in, then reissue the invoice with the right treatment. A metal fabrication firm we spoke to asked whether its software applied the reverse charge automatically. Check this before you rely on it: set a reverse charge tax rate in your accounting software and test one invoice.
Where Nexley fits
Nexley is the AI back office for UK trade firms: five AI assistants run your tenders, quotes, buying, scheduling and invoicing. It connects to the tools you already work in, you run it all from WhatsApp, and you approve everything. £799 a month.
For reverse charge work, Nexley checks the customer's status you've recorded, adds the reverse charge wording and the CIS split to the invoice it drafts, and keeps any end user letters with the customer record. You send the job details over WhatsApp and approve the invoice before it goes.
Common questions
Do I still put VAT on a reverse charge invoice?
You show it but don't charge it. The invoice states the VAT the customer must account for, or the rate, and the total you ask to be paid excludes it.
Does the reverse charge apply to labour-only subbies?
Yes, if the subbie is VAT-registered and the work is reported under CIS. HMRC says a supply of labour-only construction services is subject to the reverse charge, while a supply of staff by an employment business isn't.
Does it apply to work for homeowners?
No. A homeowner isn't VAT-registered and doesn't pay under CIS, so you charge VAT normally if you're registered.
What if I'm not VAT-registered?
Then you don't charge VAT and the reverse charge doesn't apply to your invoices. Your CIS deduction still applies to the labour.
Sources
- GOV.UK: VAT domestic reverse charge technical guide
- GOV.UK: VAT domestic reverse charge for building and construction services
- GOV.UK: How to use the VAT reverse charge if you supply building and construction services
- GOV.UK: How to use the VAT reverse charge if you buy building and construction services
- GOV.UK: Construction Industry Scheme guide (CIS 340)
Every rule, rate and date above was checked against these sources on the date shown at the top.
Topic: CIS, VAT and MTD
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