The Domestic Reverse Charge for construction services has been live since 1 March 2021. The implementation in the first year was chaotic. By 2026, the rules are well understood by larger contractors, but smaller subcontractors and one-time end users still trip over the same issues. Here is what we have learned.
How the reverse charge works
For supplies of construction services between VAT-registered businesses within the scope of CIS:
- The supplier issues an invoice showing the VAT rate and amount but without charging the customer the VAT.
- The invoice must state "Reverse charge: customer to pay the VAT to HMRC".
- The customer accounts for output VAT and reclaims input VAT on the same return, often producing a nil net effect.
The reverse charge applies to construction services, but it does not apply to:
- Supplies to consumers (B2C).
- Supplies to end users (with written notification).
- Supplies of goods only.
- Zero-rated construction services (e.g. new-build residential).
- Supplies between connected parties / group companies where the customer is the end user.
The end user notification
An end user is a business that does not make onward supplies of the construction services it receives. Property developers receiving construction services for properties they will sell or let are usually end users. A main contractor receiving services from a subcontractor and then onward-charging the client for the same services is not an end user.
End users must notify their supplier in writing of end-user status. Without this notification, the supplier must apply the reverse charge by default. The notification is typically a one-line clause in the contract or a standalone letter.
The intermediary supplier rule
A common confusion: a subcontractor invoices a main contractor, who invoices the developer. Both legs are construction services. The main contractor is not the end user (they make onward supplies), so the subcontractor applies the reverse charge. The main contractor invoicing the developer asks: is the developer the end user?
- If yes (developer holds for letting or sale): reverse charge does not apply on the main contractor's invoice.
- If no (developer onward-supplies the services, e.g. as part of a turnkey package): reverse charge applies.
What still goes wrong in 2026
1. Invoice wording errors
Invoices without the "reverse charge: customer to pay the VAT" wording can be challenged. HMRC has been pragmatic on this where the substance is correct, but we still recommend tight wording in accounting systems.
2. Mixed supplies
A single invoice covering construction services and a separately identified non-construction element (e.g. goods sold separately) requires correct apportionment. We see operators apply reverse charge to the whole invoice or none of it, both incorrect.
3. End-user status changes
A developer can be an end user for one project and not for another. The notification must be project-specific. Standing notifications can be challenged if circumstances change.
4. Repayment positions
Subcontractors regularly file in a repayment position because all their sales are reverse-charge (no output VAT) while their inputs (materials, fuel, equipment) carry input VAT. HMRC scrutinises persistent repayment claims, and we coordinate evidence to clear repayments quickly.
5. Self-billing and reverse charge interaction
Where self-billing is in place (the customer issues the invoice to themselves), the customer must still apply the reverse charge mechanics correctly. Some self-billing systems default to charging VAT, generating reconciliation errors.
VAT-registered status check
The supplier must verify that the customer is VAT-registered before applying the reverse charge. HMRC's online VAT number checker is the standard tool. If the customer is not VAT-registered, the supplier must charge VAT in the normal way.
Cash flow consequences
For main contractors, the reverse charge moved them from a cash-positive VAT position (collecting output VAT from clients and paying it quarterly) to a cash-neutral or repayment position. For subcontractors, it moved them into persistent repayment. Both sides took time to adjust to the new working capital reality. We have helped clients renegotiate payment terms with end users to compensate.
How we support construction clients
Our VAT team handles registration, returns, repayment audits, and end-user notification templates. Bookkeeping ensures invoices are coded correctly from day one. We coordinate VAT with CIS for clients where the two regimes interact heavily. Book a session or visit our construction sector page.