VAT Domestic Reverse Charge for Construction Explained: Why a £45,000 Subcontractor Invoice Should Show No VAT at All

Picture this: a subcontractor sends an invoice for £45,000 of electrical work, and there is no VAT on it at all. The main contractor’s bookkeeper assumes it is a mistake and asks for a corrected invoice. The subcontractor insists it is correct. Both are losing time, and if the VAT return gets filed incorrectly, HMRC may query it or issue a penalty. This confusion is one of the most common VAT problems in construction today, and it comes down to a rule called the VAT Domestic Reverse Charge (DRC). Once you understand how it works, invoices like this stop being a mystery and start being a routine part of running a construction business or managing its accounts.

What Is the VAT Domestic Reverse Charge?

Normally, when one VAT-registered business sells to another, the seller charges VAT, collects it from the customer, and pays it to HMRC. The customer then reclaims that VAT on its own return. Two businesses, two VAT movements, one net effect on the Exchequer. In construction, HMRC found this system was being abused: some businesses charged VAT, collected it, and then disappeared before ever paying it over — a form of fraud known as missing trader fraud. The Domestic Reverse Charge, introduced on 1 March 2021, closes that gap for certain construction services. Instead of the supplier charging VAT, the customer accounts for the VAT directly to HMRC — both as output tax (VAT it owes) and input tax (VAT it can reclaim). The two entries cancel each other out on the customer’s own VAT return, so no cash changes hands for VAT at all between the two businesses. The invoice simply shows the net amount, with a note explaining that the reverse charge applies.

Who Does This Apply To?

The reverse charge is not universal — it only applies in specific circumstances, and it is worth checking these every time a new contract starts, because getting it wrong in either direction creates VAT errors.

• Both the supplier and the customer must be VAT registered in the UK.
• The customer must be registered for the Construction Industry Scheme (CIS), and the work must fall within CIS — things like building, electrical, plumbing, groundworks, and most trades.
• The supply must be standard-rated or reduced-rated — zero-rated work is excluded.
• The customer must not be an ‘end user’ — meaning they are not the final recipient of the building work for their own use (for example, a property owner fitting out their own premises would usually be an end user, so normal VAT rules apply instead, provided they confirm this status in writing).

Worked Example: A £45,000 Subcontractor Invoice

Sparks Electrical Ltd, a VAT-registered and CIS-registered subcontractor, completes £45,000 of electrical installation work for PrimeBuild Construction Ltd, the main contractor on a new office development. PrimeBuild has confirmed in writing that it is not the end user — it is building the office for a client who will own and use it, so the chain of reverse charge applies through PrimeBuild. Here is how the invoice should look compared with a standard VAT invoice.

Notice that the invoice still needs to state that the reverse charge applies and show how much VAT is due under the reverse charge (or the VAT rate if the amount cannot be shown) — even though no VAT is added to the total payable — so the contractor knows exactly what figure to account for on its own VAT return.

Why This Matters for Your Business

For main contractors, the practical impact is on bookkeeping accuracy and VAT return preparation. Your accounting software needs the correct VAT code — most packages, such as Xero and QuickBooks, have a specific “20% RC CIS” or similar code that automatically posts both the output and input VAT entries in the right boxes. Using a standard VAT code, or no VAT code at all, will produce a wrong return. For subcontractors, the main impact is cash flow: invoices are now settled for the net amount only, so the VAT ‘float’ many smaller businesses relied on is gone. This is worth factoring into cash flow forecasts, particularly if your business previously used that VAT balance to smooth short-term working capital gaps. Subcontractors in an ongoing repayment position may also consider switching to monthly VAT returns to speed up input tax refunds from HMRC. For anyone preparing management accounts across a group with construction activity, it is also worth checking that intercompany construction invoices between group entities are reviewed for reverse charge treatment in the same way as third-party invoices, since the CIS and VAT rules apply unless written end user or intermediary supplier notifications are in place.

Ultimately, the reverse charge does not change how much a subcontractor earns or how much a contractor ultimately pays in VAT — it only changes who reports what, and when. Understanding that distinction removes the confusion the moment an invoice like Sparks Electrical’s £45,000 lands on your desk with no VAT showing.

Actionable Takeaways

1. Before invoicing, confirm in writing whether your customer is an ‘end user’ or intermediary — if they are not, both parties are VAT-registered, and CIS applies, the reverse charge is mandatory and your invoice should show no VAT charged.
2. Always include the required reverse charge wording and reference VAT rate or amount on reverse charge invoices, even though no VAT is added to the total payable, so the customer knows what to post on their VAT return.
3. Set up dedicated reverse charge VAT codes in your accounting software so output and input VAT are posted automatically to the correct boxes — do not rely on manual adjustments.
4. If you are a subcontractor, update your cash flow forecast to remove any reliance on VAT collected from customers as short-term working capital, since reverse charge invoices are settled net of VAT.