VAT Domestic Reverse Charge for Construction: CIS, Invoices, End Users and VAT Returns

Britvex Insights · Construction Tax & Compliance · UK guidance

By Britvex Advisory Editorial Team · Reviewed 21 October 2026 · Permanent article

What is the domestic reverse charge for construction VAT?

The domestic reverse charge is a VAT accounting mechanism for specified UK building and construction services. Where the conditions are met, the subcontractor or supplier does not collect VAT from the customer in the normal way. Instead, the VAT-registered customer accounts for the output VAT on its VAT return and, subject to ordinary VAT recovery rules, may reclaim the corresponding input VAT.

It is designed for particular business-to-business construction supplies, not every invoice issued by a builder. It often applies in CIS supply chains, but CIS and VAT remain separate tax systems with different purposes. A business could be required to report a payment under CIS without automatically making every element of the wider project subject to the reverse charge. Conversely, determining that the reverse charge applies requires checking VAT status, the exact supply and whether any exclusion has been properly notified.

This guide is deliberately more specific than the existing Britvex Contractors & CIS sector page: it focuses on who charges VAT, who accounts for it and what must appear on the invoice and VAT return.

When does the reverse charge apply? The five practical checks

HMRC’s supplier guidance identifies a series of cumulative conditions. In straightforward cases the supplier is UK VAT registered, the customer is UK VAT registered, the service falls within relevant construction work reportable under CIS, the service is standard or reduced-rated for VAT, and the customer has not given written notification that it is an end user or qualifying intermediary supplier. The supplier must also ensure that the supply is not an excluded supply of staff by an employment business.

1. Check that supplier and customer VAT status is appropriate.
2. Identify whether the payment for the construction service is reported under CIS.
3. Check that the supply is standard-rated or reduced-rated rather than zero-rated.
4. Determine whether an employment-business, goods-only or other exclusion applies.
5. Ask whether the recipient has supplied valid written end-user or intermediary-supplier notification.

Do not decide treatment solely from a job title such as “electrician” or “plasterer”. The nature of the contractual supply, who bears responsibility for the work, which business is the customer, and whether services are onward-supplied all matter.

Construction services normally within and outside scope

HMRC describes a broad range of relevant construction operations, including construction, repair, alteration, extensions, demolition and some installation work. Related materials supplied as part of a construction service can form part of the reverse-charge supply. Examples that need different treatment include stand-alone goods supply, certain professional services, and staffing supplies from an employment business, as well as work that is genuinely zero-rated.

These are examples, not classifications for every contract. A complex mixed supply can be treated as a single supply under VAT law. The existence of a materials line on an invoice does not automatically remove it from reverse charge treatment.

End users and intermediary suppliers: the most misunderstood exception

An end user, for this purpose, is a business that buys specified construction services for itself instead of making onward supplies of those services, while meeting the applicable VAT and CIS conditions. A property owner commissioning qualifying works can be an end user, but the correct classification depends on its precise role. The reverse charge may be disapplied for supplies to a qualifying end user where it notifies the supplier of that status in writing.

Intermediary suppliers are a special category for connected or linked VAT/CIS-registered businesses that re-supply construction services to a qualifying end user without material alteration. A business cannot simply call itself an intermediary because it sits in the middle of a subcontractor chain. The group or property-link requirements have to be met. HMRC provides detailed guidance and examples.

A private homeowner is normally outside this business-to-business reverse-charge system because the household customer is not VAT registered. That does not mean a building contractor supplying that homeowner is necessarily an end user in the separate relationship with its subcontractor.

How to check VAT and CIS registration before issuing an invoice

The supplier should take reasonable steps to check the customer’s VAT registration and CIS status and retain evidence of what was checked. VAT validation may be available through official services. Where the customer does not appear in a standard CIS check, HMRC suggests obtaining confirmation that the relevant payment is reportable under CIS. Record the customer’s identity, reference details and written status notification, not just a verbal assurance.

Your invoice approval workflow should therefore have a decision field for normal VAT, reverse charge, zero rate, or another justified treatment. The reason, source of evidence and reviewer should be documented. This is more reliable than hard-coding every construction customer to a single VAT rate in software.

Reverse charge invoice example: £10,000 of work

Suppose a VAT-registered subcontractor invoices a VAT-registered contractor for a qualifying standard-rated installation, with payment reportable under CIS and no valid end-user exclusion. The value of the supply is £10,000 before VAT. Under ordinary 20% VAT invoicing, a VAT amount of £2,000 might have been charged. Under the reverse charge, the subcontractor invoices the £10,000 net value and clearly states that the customer must account for the VAT of £2,000.

The invoice should contain the required VAT invoice details and wording that makes the reverse charge and customer responsibility unmistakable. It may show the VAT rate or notional amount, but the supplier should not add it to the amount payable. If CIS deductions apply as well, calculate those separately from the VAT process.

What goes in VAT return boxes 1, 4, 6 and 7?

For a normal reverse-charge construction purchase, the customer accounts for output VAT in box 1, and may reclaim eligible input VAT in box 4, subject to normal VAT recovery rules. The net purchase value is included in box 7. The supplier reports the net value of its reverse-charge sales in box 6 but does not report that reverse-charge VAT as its own output VAT in box 1.

On the simple £10,000 example at 20%, the customer’s box 1 includes £2,000 and box 4 may include £2,000 if fully recoverable. They can offset, but you must not promise that every customer gets a nil VAT cost: partial exemption and other restrictions can limit recovery. VAT software must map all entries correctly and ensure there are no duplicate postings.

CIS deductions and VAT reverse charge are not the same thing

CIS requires contractors to verify subcontractors where applicable, calculate deductions from the appropriate labour element and report payments to HMRC. The VAT reverse charge determines who accounts for VAT on a supply. Both may apply to the same invoice, but they must not be conflated. The fact that a subcontractor has a 20% CIS deduction is not a 20% VAT charge.

Contracts and accounting systems should separately track the gross supply, labour/material analysis, CIS withholding, amount payable and VAT reverse-charge accounting. If these are combined in a single “tax deducted” number, VAT reconciliations and subcontractor CIS statements are likely to be wrong. See Britvex Contractors & CIS and VAT services.

How the reverse charge affects subcontractor cash flow

Under normal VAT accounting, a subcontractor may collect VAT from customers and later pay net VAT to HMRC. Under the reverse charge, the subcontractor receives no VAT on the qualifying sale but may still pay VAT on purchases of materials and overheads. This can change working-capital needs, especially where monthly project expenditure is high relative to receipts.

HMRC suggests affected businesses review their VAT return position and consider whether monthly VAT returns could be appropriate where they regularly recover more input VAT than the output VAT they owe. That does not automatically make monthly returns preferable for every contractor: consider the frequency of refunds, administrative work and accuracy of the books.

Forecast cash receipts based on net customer payments after any CIS withholding—not sales plus VAT. Otherwise a subcontractor may think it has cash it will never receive. The bookkeeping process should identify reverse-charge sales before management accounts and VAT returns are prepared.

Common special cases: labour-only, mixed supplies and zero-rated work

A labour-only construction subcontractor can be making a supply of services within the reverse charge, even if there are no materials. By contrast, an employment business supplying staff to a client is generally outside the construction reverse charge. HMRC looks at the substance: who is responsible for delivering and correcting the work versus merely providing personnel.

For mixed supplies containing both construction services and related goods, it is not safe to assume that materials can simply be separated and charged standard VAT. Single-supply principles may bring the full transaction into the reverse charge. HMRC describes limited disregards and exceptions, including certain minor-element scenarios. Treat those as technical rules requiring assessment, not universal exemptions.

Zero-rated qualifying work is not reverse charged simply because it is construction. The underlying construction VAT liability, for example certain new-build works, must be evaluated first. Similarly, supplies involving residential conversions, operated plant, scaffolding or other technical categories can need closer reading of HMRC’s technical guide.

What records should a construction business keep?

1. Customer and supplier identities and VAT status checks.
2. CIS status verification evidence where relevant.
3. Contracts, variations, certified valuations and payment applications.
4. Written end-user or intermediary-supplier declarations.
5. Invoices with clearly stated reverse-charge wording and rate.
6. Labour and materials analysis supporting CIS deductions.
7. VAT ledger mapping for boxes 1, 4, 6 and 7.
8. CIS statements, payment records and reconciliation schedules.
9. Credit notes and evidence for VAT treatment changes.
10. Software audit trails and document retention under applicable rules.

These records support explanations during an HMRC query, protect against applying the wrong VAT rate and help the team reconcile the same supply across billing, procurement and subcontractor payment processes. Digital records should be controlled and retrievable.

A practical construction VAT reverse-charge decision workflow

First, identify what the supplier is actually providing. Second, establish the VAT liability of that supply. Third, determine CIS coverage and the customer’s role. Fourth, check both parties’ VAT status. Fifth, request and retain written exclusions where appropriate. Sixth, generate the correct invoice and VAT software code. Seventh, reconcile the contractor’s VAT return and any CIS deductions against original invoices and payment certificates.

The review should occur when a contract or subcontractor is first added, not only after a quarterly VAT return has been submitted. Repeat checks if contracts change, customers become or cease to be VAT registered, project ownership changes, or a construction business switches from direct building work to providing workers through an employment business.

Operationally, separate responsibilities: project management confirms the work and customer role; accounts payable checks supplier documents; VAT reviewer confirms tax treatment; and finance signs off monthly reconciliations. This reduces the chance that a technically correct decision disappears when staff change or project volumes increase.

How Britvex supports construction VAT and CIS

Britvex provides Construction and Trades accounting, Contractor & CIS support, VAT registration and returns and Bookkeeping for UK businesses. A coordinated review can help ensure that invoice coding, CIS withholding, ledger postings and VAT returns describe the same underlying transactions.

If you are uncertain whether a customer is an end user, whether an invoice is within the reverse charge or how to correct historic entries, obtain an engagement-specific review rather than relying on a generic rule. Existing clients can submit supporting documents securely through the Britvex Client Portal.

BRITVEX ADVISORY LTD · Company No. 16133503 · Britvex.com · Britvex.co.uk · Client Portal. Last reviewed 21 October 2026. General information, not individual advice.