Trades and CIS: VAT
The VAT reverse charge for construction, without the jargon
A construction invoice with no VAT on it is not usually a mistake. Here is exactly when the reverse charge applies, how to invoice under it, what goes in which box of the VAT return, and the cash-flow hit most subcontractors do not see coming until their first repayment quarter.
Since 1 March 2021, most VAT-registered subcontractors doing CIS work for other VAT-registered, CIS-registered contractors have been required to leave VAT off the invoice entirely and let the contractor account for it instead. The rule exists to close a specific fraud pattern, where a subcontractor collected VAT and disappeared before paying it to HMRC. It was never designed to catch out subcontractors doing everything right, but five years on it catches plenty of them.
HMRC’s patience with genuine errors ran out long ago. Reverse charge treatment is now a routine checkpoint in construction VAT inspections, and getting it wrong in either direction, charging VAT that should not be there or leaving it off a contract that does not qualify, creates real problems on both sides of the invoice.
The short version
The construction reverse charge at a glance
| Question | Short answer |
|---|---|
| What is the domestic reverse charge? | The rule that moves responsibility for VAT on most CIS construction work from the supplier to the customer |
| When did it start? | 1 March 2021. It is still in force and is now a standard inspection point |
| Who does it apply to? | VAT-registered subcontractors invoicing VAT-registered, CIS-registered contractors for standard or reduced-rated construction work |
| Does it apply to new-build homes? | No. Most new-build residential work is zero-rated and falls outside the reverse charge |
| What is the biggest cash-flow risk? | Subcontractors lose the VAT they used to hold between invoicing and paying HMRC, and often move into a repayment position |
The mechanism
What is the domestic reverse charge?
It moves who pays, not how much is owed
Under the old rules a subcontractor charged VAT on a job, collected it from the contractor and paid it over to HMRC on their next return, holding the cash in the meantime. Under the reverse charge that middle step disappears. The subcontractor’s invoice shows no VAT collected. Instead the contractor declares the VAT themselves: as output tax in box 1 of their own return and, if they are entitled to reclaim it, as input tax in box 4 of the same return. For a fully taxable contractor the two entries cancel out, so no cash changes hands over the VAT element. It never leaves the contractor’s business in the first place.
Scope
When does it apply, and when does it not?
Three things must all be true for the reverse charge to apply. Two further situations take a supply back out of it even when those three are met. If in doubt, work through them in order.
| Test | Effect |
|---|---|
| 1. The customer is VAT-registered and registered for CIS as a contractor | Must be true. If the customer is not VAT-registered, charge VAT as normal |
| 2. The work is a construction operation under CIS | Must be true. Professional services such as architecture or surveying on their own are outside CIS |
| 3. The supply is standard-rated or reduced-rated | Must be true. Zero-rated work, including most new-build housing, is excluded |
| The customer has confirmed in writing that they are an end user or intermediary supplier | Takes the supply outside the reverse charge. Charge VAT as normal |
| You are an employment business supplying staff rather than construction services | Takes the supply outside the reverse charge. Charge VAT as normal |
| The reverse charge element is 5% or less of the invoice value | Optional disregard. The whole supply can be treated under normal VAT rules if you choose |
The end user exception
An “end user” is a business that receives construction work but does not sell that work on: a retailer having its own shop refitted, for example, rather than a main contractor building it for someone else. End users can ask to be invoiced VAT in the normal way. The exception only applies if they confirm their status in writing, at or before the time of supply.
Silence is not confirmation. If a customer has not put their end user or intermediary supplier status in writing, HMRC’s default position is that the reverse charge applies regardless of what either side assumed. Treating a “probably an end user” customer as one without that written confirmation is one of the most common and most costly mistakes on either side of a construction invoice.
Paperwork
How to invoice under the reverse charge
The VAT still needs to appear, just not as a charge
A compliant reverse charge invoice is not a normal invoice with the VAT line deleted. It needs to show the net amount excluding VAT, the rate or amount of VAT that would have applied (so the contractor knows exactly what to self-account for), and a clear statement that the reverse charge applies. HMRC accepts wording such as “Reverse charge: customer to account for VAT to HMRC” or “Reverse charge: we will account for and pay the output tax due to HMRC”. What it must not do is add that VAT to the total the customer pays.
The return
What goes in which box
This is where most bookkeeping errors happen, on both sides. Modern software handles it if the invoice is coded to the correct reverse charge VAT rate, but it is worth knowing what the software should be doing.
| Who | VAT return treatment |
|---|---|
| Subcontractor (supplier) | Net sale in box 6. Nothing in box 1. Input VAT on your own costs still goes in box 4 and net purchases in box 7 as usual |
| Contractor (customer) | VAT on the purchase in box 1 as output tax and in box 4 as input tax (subject to normal recovery rules). Net purchase in box 7. Nothing in box 6 |
Worked example
One invoice, two outcomes
Take a subcontractor billing £8,000 net for standard-rated groundworks. Whether VAT appears on that invoice depends entirely on who is being billed.
The invoice total drops from £9,600 to £8,000. The price has not changed. The £1,600 of VAT simply never passes through the subcontractor’s bank account.
Working capital
The cash-flow impact
Before the reverse charge, subcontractors held the VAT they had collected from contractors for anything up to several months between invoicing and their next return: a genuine, if temporary, source of working capital. That float has gone, because no VAT is collected on qualifying sales in the first place.
Meanwhile subcontractors still pay VAT on materials, fuel, tools and overheads, and still reclaim it as input tax. For a business doing mostly CIS work the result is often a shift from a net-payment position to a net-repayment position: HMRC now owes the subcontractor money each quarter rather than the other way round.
Where it goes wrong
Common errors and penalties
| Error | Why it happens |
|---|---|
| Charging VAT on a supply that should be reverse-charged | The customer’s status was assumed rather than confirmed in writing |
| Applying the reverse charge to zero-rated new-build work | The reverse charge only covers standard and reduced-rated construction operations |
| Splitting labour and materials onto separate invoices to avoid it | If any part of a single supply qualifies, HMRC treats the whole supply as reverse-charged |
| Treating a likely end user as one without written confirmation | Silence is not confirmation. The default is to apply the reverse charge |
| Contractor leaving the entries out of box 1 and box 4 | The customer still has to self-account for both output and input tax on their own return |
| Staying on the Flat Rate Scheme with mostly reverse-charged sales | Reverse charge sales sit outside flat rate turnover, so the scheme quietly stops working in your favour |
HMRC allowed a light-touch approach to genuine errors for the first six months after the rules began in 2021. That period ended long ago. Reverse charge mistakes are now treated like any other VAT inaccuracy, with the usual risk of assessments, interest, and penalties of up to 30% of the error for a careless mistake and considerably more for a deliberate one. Reverse charge compliance is a standard focus of HMRC’s VAT inspections in the construction sector.
Getting CIS deductions and reverse charge treatment right on every invoice is exactly the kind of detail our construction and CIS accounting service is built around, alongside the VAT returns and bookkeeping service that keeps quarterly returns accurate whichever side of the reverse charge your business sits on.
Quick answers
Frequently asked questions
Does the reverse charge apply to all construction work?
No. It applies only to standard or reduced-rated work that counts as a construction operation under CIS, supplied by a VAT-registered business to another VAT-registered, CIS-registered contractor who has not confirmed end user or intermediary supplier status in writing.
What if I am not sure whether my customer counts as an end user?
Ask for written confirmation before you invoice. Without it, apply the reverse charge by default. Assuming end user status without proof is one of the most common and costly mistakes made on either side of a construction invoice.
Do I still put VAT on a reverse charge invoice?
You show the rate and amount of VAT that would apply, plus a clear statement that the customer must account for it themselves, but you do not add it to the total or collect it.
Why has my VAT position flipped from paying to reclaiming?
Because you are no longer collecting output VAT on your CIS sales while still paying VAT on materials and overheads. Many subcontractors move from a net-payment to a net-repayment position, and switching to monthly VAT returns gets that money back faster.
Can I stay on the Flat Rate Scheme if my sales are reverse-charged?
You can, but it rarely pays. Reverse charge sales are excluded from flat rate turnover and you cannot reclaim input VAT on the related costs, so a subcontractor doing mostly CIS work usually does better on standard VAT accounting.
What happens if I get the reverse charge wrong?
HMRC’s original light-touch period for genuine errors ended in 2021. Today it is treated as a normal VAT inaccuracy, with the usual risk of assessments, interest and penalties of up to 30% for careless errors.
Does the reverse charge apply to new-build housing?
No. Most new-build residential construction is zero-rated, and the reverse charge only applies to standard or reduced-rated work.
Get every invoice right first time
If you are not sure whether a job should carry VAT, whether your customer’s end user paperwork is in order, or why your VAT position has flipped from paying to reclaiming, it is worth a proper look before your next return. We work with contractors and subcontractors across the trades to keep CIS and VAT treatment correct on every invoice, on one fixed monthly fee agreed in writing.
No obligation, same-day response. Or call us on 01224 042961.
Best fit: VAT-registered contractors and subcontractors who want CIS, VAT and bookkeeping run for them. If you only need a one-off return checked, a local bookkeeper will likely be better value.
