VAT Reverse Charge for Construction: The Rule That Confuses Everyone

‍‌‌‌​‌‌​​​‌‌​‌‌‌​‌​‌‌​‌​‌​‌‌​‌​‌‌‍SiteKiln gives you plain-English information, not legal advice. If you need advice specific to your situation, talk to a qualified accountant or VAT adviser.

The short version

The VAT domestic reverse charge for construction means that, on certain jobs between VAT-registered builders, the customer works out and reports the VAT instead of the subcontractor. The sub invoices no VAT, writes that the reverse charge applies, and the main contractor both charges and reclaims the VAT on their own VAT return, so the cash effect is usually neutral for them.

Why it matters

If you get this wrong, you can easily underpay or overpay VAT, and HMRC can charge penalties for incorrect returns or mis-issued invoices. For many small contractors, the reverse charge also kills the old habit of living off the VAT money in the bank for three months, because you're no longer collecting that VAT on qualifying jobs in the first place.

The construction reverse charge is an anti-fraud rule that shifts the VAT accounting from the supplier (subbie) to the customer (main contractor) on certain UK building and construction services. It applies to standard-rate (20%) and reduced-rate (5%) construction work within the scope of CIS, where both parties are VAT-registered and the customer is not an end user. The legal hook is in section 55A of the VAT Act 1994 and secondary regulations, and HMRC explain the detail in their published reverse charge guidance and manual.

5.5.1 When the reverse charge applies (in normal builder English)

You generally use the reverse charge when all of these are true:

• The work is standard or reduced-rate building and construction work covered by CIS (things like building, repairs, alterations, installing heating or electrics).
• The supplier and the customer are both VAT-registered in the UK.
• The payment is within the scope of CIS (even if no CIS is actually deducted, for example gross status).
• The customer is not the "end user" -- they're using your work as part of an onward supply of construction services down the chain.

You do not use the reverse charge if:

• The customer is not VAT-registered.
• The work is zero-rated (like many new-build houses).
• You're working for an end user (like a homeowner, landlord, or a business that's keeping the building for its own use) and they've told you that in writing.
• You're just supplying staff through an employment business, not full construction services.

If in doubt, HMRC say it's better to treat the customer as reverse charge and get written confirmation if they are actually an end user.

5.5.2 What changes for subcontractors

As a VAT-registered subbie dealing with a VAT-registered contractor under the reverse charge:

• You do not add VAT to your invoice on qualifying jobs.
• Your invoice clearly states that the domestic reverse charge applies and shows the VAT rate or VAT amount the customer must account for.
• You record the sale in your VAT records as a reverse charge supply, but there's no output VAT for you to pay to HMRC on that invoice.
• You still reclaim input VAT on your own costs in the normal way, subject to the usual rules.

The big change is cashflow: you're no longer collecting VAT from the contractor and holding it until the next VAT return.

Simple example (ignoring CIS here):

• Old way: £1,000 + 20% VAT = £1,200 invoice; you collect £200 VAT and pay HMRC later.
• Reverse charge: £1,000 invoice, no VAT charged, and you note "reverse charge -- customer to account for VAT".

5.5.3 What changes for main contractors

If you're the VAT-registered customer receiving a reverse-charge invoice:

• You get an invoice from the sub with no VAT charged, but it says the reverse charge applies and shows the VAT rate.
• On your VAT return you:
  • Put the VAT amount that would have been charged as output tax (Box 1).
  • Claim the same amount as input tax (Box 4), if you're entitled to full recovery.

For most main contractors who can reclaim all their VAT, this is VAT-neutral -- it cancels out. But you no longer hand VAT over to the sub; you pay it direct to HMRC on your return instead.

A £1,000 job -- old rules vs reverse charge

Assume:

• Subcontractor and main contractor are both VAT-registered.
• Work is standard-rate construction within CIS, and the main contractor is not the end user (they're passing the work on). So reverse charge does apply now.

Before reverse charge (old way)

Subcontractor's invoice:

• Labour and materials: £1,000
• VAT at 20%: £200
• Total invoice: £1,200

Sub's position:

• They collect £1,200 from the contractor.
• On their VAT return, they pay £200 output VAT to HMRC (minus any input VAT on their own costs).
• There is a cashflow boost: they hold that £200 until the VAT quarter end.

Contractor's position:

• They pay £1,200 to the sub.
• On their VAT return, they reclaim £200 input VAT, assuming full recovery.
• Net VAT to HMRC on this bit of the chain is nil -- it goes out as output VAT from the sub and back in as input VAT for the contractor.

After reverse charge (current rules)

Same job, but reverse charge now applies.

Subcontractor's invoice:

• Labour and materials: £1,000
• VAT line: "VAT domestic reverse charge applies -- customer to account for VAT at 20%" (you can show the VAT amount £200, but you don't add it to the total).
• Total invoice: £1,000

Sub's position:

• They collect £1,000 from the contractor, not £1,200.
• They do not account for output VAT on this invoice on their VAT return -- it is a reverse charge supply.
• They still claim input VAT on their own costs as normal (subject to the rules), but they no longer get that £200 cash sitting in the bank between VAT returns.

Contractor's position:

• They pay £1,000 to the sub.
• On their VAT return they:
  • Declare £200 as output VAT (as if they'd charged it themselves).
  • Reclaim £200 as input VAT (if they have full recovery).
• Again, net VAT to HMRC is nil on this link, but the VAT is now book-kept by the contractor, not the sub.

This is the key message:

• Subs: no VAT added, no VAT passed to HMRC on qualifying reverse-charge invoices, but you lose the old VAT cash buffer.
• Contractors: you do the VAT maths yourself on those invoices and post it both ways on your return, even though no VAT cash changes hands on that specific payment.

5.5.4 Legal and HMRC guidance in the background

You don't need to quote chapter and verse on site, but for your notes:

• Section 55A of the VAT Act 1994 and associated orders create the domestic reverse charge mechanism for certain services.
• HMRC's "Check when you must use the VAT domestic reverse charge for building and construction services" and the technical guide are the main public guidance.
• HMRC also have a dedicated VAT Reverse Charge for Building and Construction Services Manual that goes into scope, invoicing and examples for advisers.

The aim across all of this is to stop "missing trader" fraud where someone charges VAT and disappears without paying it over.

Checklist -- if you're in the reverse charge world

From the subcontractor side:

• Confirm if your customer is VAT-registered and if the work is CIS-type construction.
• Ask if they are an end user; if they say yes, ask for that in writing.
• Where reverse charge applies, issue invoices without VAT, clearly marked that the reverse charge applies and showing the rate/amount.
• Make sure your accounting system can flag reverse-charge sales correctly.

From the contractor side:

• Check suppliers' invoices -- are they correctly marked as reverse charge when they should be?
• On reverse-charge invoices, work out the VAT yourself and post it as both output and input tax on your VAT return.
• Keep records showing why you treated a job as reverse charge vs normal VAT, especially end-user confirmations.
• Train whoever raises invoices and books them to recognise reverse-charge jobs.

What to do next

• Check whether each of your current jobs meets all three reverse charge tests (CIS work, standard/reduced rate, both VAT-registered and customer not end user).
• Update your invoice templates to include the correct reverse charge wording where it applies.
• If a customer says they are the end user, get that in writing and keep it on file.
• Make sure your accounting software can flag reverse charge sales separately on your VAT return.

Sources and legislation

• Value Added Tax Act 1994 -- section 55A, domestic reverse charge mechanism. legislation.gov.uk/ukpga/1994/23
• The Value Added Tax (Section 55A) (Specified Services and Excepted Supplies) Order 2019 -- statutory instrument implementing the construction reverse charge. legislation.gov.uk/uksi/2019/892
• Finance Act 2004 -- CIS scope and definitions relevant to reverse charge. legislation.gov.uk/ukpga/2004/12

Related guides on this site

• 5.4 VAT registration
• 5.13 Flat rate VAT scheme
• 5.16 VAT for builders
• 1.7 Reverse charge VAT
• 5.2 CIS registration and verification
• 14.10 Cashflow and pricing

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