If you work in construction and you’re VAT-registered, the domestic reverse charge for construction services changes how you account for VAT. Instead of charging VAT on your invoice and paying it to HMRC, your customer accounts for it instead. Get this wrong and you could end up with a VAT bill you weren’t expecting — or underpay and face a penalty.
This guide covers exactly how the reverse charge works, which services it applies to, and what you need to do in practice.
What Is the Construction VAT Reverse Charge?
The Construction Industry Scheme (CIS) domestic reverse charge came into effect on 1 March 2021. It applies to VAT-registered businesses supplying certain construction services to other VAT-registered businesses in the UK.
Under the normal VAT rules, if you supply a service you charge VAT, collect it from your customer, and pay it over to HMRC. Under the reverse charge, you don’t charge VAT at all. Instead, your customer accounts for the VAT themselves — they record both the input tax and the output tax on their own VAT return. The money never changes hands between you and your customer for the VAT element.
HMRC introduced this to tackle VAT fraud in the construction sector, where some subcontractors were collecting VAT from contractors but disappearing before paying it to HMRC.
Who Does It Apply To?
The reverse charge applies when all of the following conditions are met:
- Both the supplier and the customer are VAT-registered in the UK
- The supply falls within CIS — meaning the supplier is registered for CIS, or should be
- The customer is not an end user
- The services are standard or reduced-rated for VAT (zero-rated supplies are excluded)
The key term here is end user. An end user is someone who does not make onward supplies of the construction services — typically the final client or property owner. If your customer is a developer who is building properties to sell, they are not an end user. If your customer is a business that is simply having its office refurbished for its own use, it may be an end user and the reverse charge would not apply.
End users and intermediary suppliers (businesses connected to end users who are also VAT-registered) can opt to be treated as end users and tell you in writing. Once they do, normal VAT rules apply.
Which Services Are Covered?
The reverse charge covers services that fall within the CIS. That includes a wide range of construction and building work:
- Construction, alteration, repair, extension, and demolition of buildings and structures
- Installation of systems for heating, lighting, air conditioning, ventilation, power supply, drainage, sanitation, and water supply
- Internal cleaning of buildings during construction
- Painting and decorating
- Groundwork and civil engineering
- Carpentry, joinery, plastering, and flooring
Some services are specifically excluded from the reverse charge even if they fall under CIS for other purposes. These include:
- Professional services such as architecture, surveying, and design (where these are the primary supply)
- Supplies of staff or workers only (labour supply businesses not providing a construction service)
- Manufacture or delivery of materials where no construction service is provided
- Zero-rated services, such as construction of new residential dwellings
If you work in the construction industry and you’re unsure whether a particular service falls inside or outside the reverse charge, the safest approach is to check with an accountant before issuing your invoice.
How to Invoice Under the Reverse Charge
When the reverse charge applies, you must change how you raise your invoices. The rules are specific.
What to include on a reverse charge invoice
- Show the net amount of your supply as normal
- Do not add VAT to the invoice — show £0 VAT
- Include the VAT rate that would have applied (e.g. 20%)
- Add a clear statement that the domestic reverse charge applies and the customer must account for VAT
- State the amount of VAT the customer needs to account for (e.g. “Reverse charge: customer to account for £X VAT to HMRC”)
A typical note on the invoice might read: “Domestic reverse charge applies — customer to account for VAT of £[amount] under Section 55A VATA 1994.”
If you raise an invoice without applying the reverse charge when it should apply, your customer should tell you so you can correct it. If you do charge VAT incorrectly and your customer pays it, HMRC may require you to account for that VAT anyway — and your customer cannot reclaim it.
How It Affects Your VAT Return
As the supplier under the reverse charge, your VAT return changes in two ways:
- Box 1 (VAT due on sales): you do not include any output VAT for reverse charge supplies
- Box 6 (total value of sales): you still include the net value of reverse charge sales here
As the customer receiving reverse charge services, you must:
- Add the VAT to Box 1 as output tax
- Reclaim the same amount in Box 4 as input tax (assuming you can recover the VAT in full)
- Include the net value in Box 7
For most VAT-registered businesses in a VAT-taxable trade, the net effect is zero — the input and output tax cancel out. But you still have to record it correctly on your return.
If you’re using accounting software such as Xero, make sure you’re using the correct VAT codes. Xero has specific tax codes for domestic reverse charge supplies. If you need help setting this up correctly, Xero training can save you from making errors on your returns.
Cash Flow Impact for Subcontractors
The reverse charge can create a genuine cash flow problem for subcontractors. Under the old system, you collected VAT from your customer and held it until your VAT return was due. That gave you a short-term cash buffer. Under the reverse charge, you never collect that VAT — so that buffer disappears.
If you’re a subcontractor who previously relied on that VAT float, you need to plan for its absence. Some trades have moved to monthly VAT returns instead of quarterly to get a quicker refund if they are regularly in a VAT repayment position. It is worth discussing your VAT return frequency with your accountant to see what works best for you.
If you need help managing and filing your returns, our VAT returns service covers the whole process from preparation through to submission.
The Interaction with CIS
The reverse charge only applies to supplies that fall within CIS. That means if you are not registered for CIS and your work does not fall within the scheme, the reverse charge does not apply to you.
However, most subcontractors in construction are required to be registered for CIS if they are working for a contractor. If your customer is a contractor under CIS, the reverse charge is very likely to apply when you invoice them — assuming both parties are VAT-registered and the customer is not an end user.
CIS deductions and VAT reverse charge are separate things. CIS deductions are made by the contractor from your net payment, at either 20% or 30% depending on your verification status. The reverse charge is purely about who accounts for the VAT. They run alongside each other.
If you need help with your CIS returns, we handle monthly CIS submissions for both contractors and subcontractors.
Common Mistakes Traders Make
Charging VAT when the reverse charge should apply
This is the most common error. A subcontractor charges VAT as normal, the contractor pays it, and then both parties are in trouble — the subcontractor may still owe HMRC the VAT, and the contractor has paid VAT it should have accounted for itself.
Applying the reverse charge to end users
If your customer is an end user, the reverse charge does not apply. You should charge VAT in the usual way. Always confirm your customer’s status before issuing the invoice. Ask them in writing and keep the response on file.
Not including the required wording on invoices
An invoice that doesn’t carry the correct reverse charge wording is non-compliant. HMRC expects the invoice to make clear that the reverse charge applies and that the customer must account for the VAT.
Incorrect bookkeeping
If reverse charge transactions are coded incorrectly in your accounts, your VAT returns will be wrong. This can lead to underpayments, penalties, or repayment claims you’re not entitled to. Accurate bookkeeping is non-negotiable when dealing with reverse charge VAT.
Forgetting to include net values in Box 6
Some traders think that because no VAT is charged, they leave the supply off the VAT return entirely. You still need to include the net value of reverse charge sales in Box 6 of your return.
What Happens If You Get It Wrong?
HMRC has a specific compliance regime for the reverse charge. If you charge VAT when you should not have, HMRC can direct the contractor to withhold the VAT and pay it directly to HMRC — meaning you’ve invoiced for VAT but never receive it, yet HMRC still expects you to account for it.
If you fail to apply the reverse charge when you should, HMRC can assess the customer for the VAT they failed to account for. Penalties may also apply depending on whether HMRC considers the error careless or deliberate.
HMRC does acknowledge there will be genuine mistakes, particularly shortly after changes in a business’s supply chain. In some cases, they may take a light-touch approach where both parties have acted in good faith. But that is not something you should rely on.
Confirming Whether the Reverse Charge Applies
Before you raise an invoice, run through this checklist:
- Is the supply a construction service within CIS? If no, normal VAT rules apply.
- Is the supply standard or reduced-rated for VAT? If it’s zero-rated, normal VAT rules apply.
- Are you VAT-registered? If no, you cannot charge VAT anyway — the reverse charge is irrelevant.
- Is your customer VAT-registered? If no, normal VAT rules apply and you charge VAT as normal.
- Is your customer an end user or intermediary supplier who has confirmed end-user status? If yes, normal VAT rules apply.
- If all the above are answered correctly, the reverse charge applies.
Keep written confirmation of your customer’s VAT registration number and their status (contractor or end user) for every project. HMRC can ask for this during a compliance check.
Practical Steps to Get This Right
Set up your invoicing template to include the correct reverse charge wording. Do not rely on a single template for all customers — you may be supplying both contractors (reverse charge) and end users (standard VAT) at the same time.
Make sure your accounting software is configured with the correct VAT codes for domestic reverse charge supplies. Incorrect coding here will flow straight through to errors on your VAT return.
Review your VAT return frequency. If you are regularly not collecting VAT under the reverse charge, a monthly return may improve your cash position.
If you take on a new customer or start a new project, go through the checklist above before you invoice. Do not assume the rules are the same as a previous project — the customer’s status can change the answer entirely.
The VAT reverse charge for construction is not complicated once you understand the logic behind it. The problems arise when trades apply it inconsistently or don’t bother to check their customer’s status. A few minutes of due diligence at the start of a project will protect you from a VAT dispute months down the line.
If you work in construction and want to make sure your VAT, CIS, and bookkeeping are all set up correctly, get in touch with us. We work with contractors and subcontractors across the UK and can take the admin off your plate so you can focus on the work.
