The VAT domestic reverse charge for construction has been with us for a few years now, and yet it still trips up trades every week. It does not change how much VAT is due overall — it changes who hands it to HMRC. Instead of the sub-contractor charging VAT and passing it on, the customer accounts for it. Get the mechanics wrong and you can either invoice incorrectly for months or quietly damage your own cash flow.
If you are a builder, plasterer, electrician, scaffolder or any kind of construction sub-contractor, this is worth twenty minutes of your attention. Below is a plain-English walk-through of who it applies to, how your invoices change, what it does to your bank balance, and the slip-ups to avoid.
This is general information for UK businesses, not tax advice. VAT and CIS rules change and the details depend on your circumstances — confirm the current position on GOV.UK or with a qualified accountant before acting.
What the reverse charge actually is
Normally a VAT-registered supplier adds VAT to its invoice, collects it from the customer, and pays it over to HMRC. Under the reverse charge, for qualifying construction work the sub-contractor does not add VAT to the invoice. Instead, the customer (the contractor receiving the work) accounts for both the output VAT and the corresponding input VAT on their own return. The two usually cancel out, so no cash actually moves for the VAT — it is an accounting entry.
The whole point is to stop "missing trader" fraud, where a supplier charged VAT, pocketed it and vanished before paying HMRC. By moving the VAT accounting to the customer, that gap closes.
Who it applies to
The reverse charge applies when all of these are true:
- The supply is of construction services (and any materials supplied with them) that fall within the Construction Industry Scheme.
- Both parties are VAT registered.
- Both parties are registered for CIS.
- The customer is not the end user — they are buying the work to supply on, typically another contractor in the chain.
- The supply is standard-rated or reduced-rated (zero-rated work is excluded).
The "end user" point is the one people miss. If your customer is the final consumer of the building — a homeowner, or a business having work done on its own premises that it will not on-supply — normal VAT rules apply and you charge VAT as usual. The reverse charge only bites within the construction supply chain. Because it is so closely tied to CIS, it helps to be comfortable with that scheme too; our guide to the Construction Industry Scheme sets out the basics.
How your invoices change
When the reverse charge applies, your invoice must:
- Show all the usual details, but with no VAT charged in the total.
- State clearly that the reverse charge applies — wording such as "Reverse charge: customer to account for VAT to HMRC".
- Show the VAT rate that would have applied (for example 20%) or the amount of VAT, so the customer knows how much to account for, even though you are not collecting it.
Your accounting software almost certainly has a reverse-charge VAT code built in — use it rather than zero-rating by hand, because it puts the figures in the right boxes on the return automatically.
The reverse charge does not cost you a penny in extra tax. But for a sub-contractor used to holding the VAT for a few weeks before paying it over, losing that buffer can feel like a pay cut.
The cash-flow impact (and why it stings)
Here is the part that catches sub-contractors out. Under the old rules you invoiced, say, £10,000 plus £2,000 VAT, received £12,000, and only later paid that £2,000 to HMRC. In the meantime the money sat in your account. It was never yours — but it cushioned your cash flow.
Under the reverse charge you only ever receive the £10,000. The £2,000 buffer is gone. For a business running tight margins on staged payments, that can be the difference between comfortable and squeezed. The fix is to plan for it: tighten your invoicing, chase payment promptly, and keep a working-capital cushion. Our piece on managing business cash flow has practical tactics, and many sub-contractors find that moving onto monthly VAT returns helps because reverse-charge work often leaves them in a repayment position.
How it interacts with VAT schemes and thresholds
Two interactions matter. First, reverse-charge supplies do not count towards the VAT registration threshold in the usual way for the customer, but as a supplier you still need to watch your own turnover — if you are near the line, read up on the VAT registration threshold before assuming you are below it. Second, the Flat Rate Scheme and the reverse charge do not play nicely together: reverse-charge sales are generally excluded from flat-rate turnover, which often makes the scheme far less attractive for affected trades. If you are on it, our flat rate scheme guide is worth a re-read, and it may be time to come off it.
Common mistakes to avoid
- Charging VAT when you should not. The single most common error. If all the conditions are met, do not add VAT — even if it feels wrong.
- Applying the charge to an end user. Always confirm in writing whether your customer is an end user. Keep their statement on file.
- Forgetting the invoice wording. A reverse-charge invoice with no statement is non-compliant, even if the numbers are right.
- Ignoring the cash-flow hit. Plan for the lost VAT buffer rather than discovering it the hard way mid-project.
- Mixed supplies done sloppily. If a single job genuinely mixes reverse-charge and normal work, there are rules on how to treat it — get advice rather than guessing.
What to do now
Check every regular customer: are they VAT registered, CIS registered, and an end user or not? Update your invoice templates and accounting codes. Talk to your bookkeeper about whether monthly returns or coming off the Flat Rate Scheme would help. And review your cash position now that the VAT buffer has gone — because that is where the real-world pain shows up.
Frequently asked questions
Does the reverse charge mean I pay more VAT?
No. The total VAT due across the chain is identical. It simply moves the responsibility for accounting for it from you to your customer. The only practical difference for you is that you no longer hold that VAT cash before passing it on.
How do I know if my customer is an end user?
Ask them, in writing, and keep the confirmation. End users are those who use the building themselves rather than selling the construction work on. If a customer tells you they are an end user, you charge VAT normally and rely on their statement.
Should I come off the Flat Rate Scheme?
Quite possibly. Because reverse-charge sales are excluded from flat-rate turnover, many affected sub-contractors find the scheme no longer saves them money and can even cost them. Run the numbers for your own situation, or ask your accountant, before the next return.
The reverse charge is more of an admin and cash-flow change than a tax change, but it rewards getting the details right. If construction is your line of work, it also pays to keep an eye on public-sector building opportunities — you can browse live construction contracts by CPV category to see what is out there and plan your pipeline around it.
