VAT Compliance · 2026/27
CIS and VAT: The Domestic Reverse Charge Explained — When to Charge, When Not To, and How to Get It Right
Since March 2021, most VAT-registered CIS subcontractors should not be charging VAT to other VAT-registered contractors. Many still are. Some who should be applying Reverse Charge are not. Both errors attract HMRC penalties — here is the plain-English guide.
The Domestic Reverse Charge for construction services is not new — it came into force in March 2021 after two years of delays. Yet it remains one of the most consistently misunderstood VAT rules in the industry. Subcontractors charge VAT when they should not. Others apply standard VAT to invoices that should carry no VAT at all. The consequences of both errors are avoidable — but only if you understand which situation you are in before you raise the invoice.
What the Domestic Reverse Charge Actually Does
Under DRC, Your Client Pays the VAT — Not You
In a normal VAT transaction, you add 20% VAT to your invoice, collect it from your client, and pay it to HMRC on your next return. Under the Domestic Reverse Charge, that flow is reversed. You invoice the net amount only. Your client — not you — accounts for the VAT and pays it directly to HMRC. You receive less cash. Your client handles the VAT administration. The purpose of the rule is to prevent VAT fraud in construction supply chains, where subcontractors were collecting VAT from contractors and disappearing before paying HMRC.
Under the old system, you collected £4,000 in VAT and held it for up to three months before paying HMRC. Under DRC, that float disappears. Planning for this cash flow change is not optional.
CIS Tax Insights, 2026The Three Conditions That Trigger DRC
DRC applies only when all three of the following conditions are met simultaneously. If any one of them is absent, the standard VAT rules apply and you charge VAT normally.
An End User is someone who will use the construction work themselves — a homeowner, a business fitting out its own premises, a school building its own extension, a landlord maintaining their own property. If your client is an End User, you charge VAT normally. If they are a contractor who will supply the work onwards to someone else — which covers most main contractors, developers, and housing associations — DRC applies.
What the Invoice Looks Like — Wrong vs Right
This is the same £20,000 plumbing package, two different invoices. One creates a VAT problem for both parties. One is compliant.
The Cash Flow Impact Nobody Warns You About
The rule change is not just administrative — it has a direct and immediate effect on your cash flow. Understanding it before it happens is the difference between planning and crisis.
| Under old rules: invoice total including VAT | £24,000 |
| Under old rules: VAT held in your account (up to 3 months) | £4,000 float |
| Under DRC: invoice total you actually receive | £20,000 |
| Under DRC: VAT float available to you | £0 |
| Cash flow gap if you were relying on VAT float for working capital | −£4,000 |
| What you must plan for on every DRC job | 20% less cash |
The VAT float — the £4,000 you used to hold between invoicing and paying HMRC — was often used informally as working capital. Suppliers got paid, wages went out, materials were bought. Under DRC, that money never arrives. If you have not adjusted your cash flow planning to account for this, the squeeze will arrive faster than you expect.
The Quick Decision: Do I Apply DRC or Charge Normal VAT?
Run through these questions before you raise any invoice to a VAT-registered client on a CIS job.
The Exact Invoice Wording You Must Use
When DRC applies, your invoice must contain a specific statement that makes clear the reverse charge applies and that the customer is responsible for accounting for the VAT. Without this wording, the invoice is technically non-compliant even if the amounts are correct.
Customer to account for the output tax of £[amount] to HMRC.
VAT registration number of customer: [their VAT number]."
Practical Checklist: Getting DRC Right on Every Job
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Confirm Client VAT Registration Before You Start Ask for their VAT registration number before you raise the invoice — not after. You can verify any UK VAT number instantly on HMRC's website. Keep a record of the number and the date you verified it. If a client later turns out not to be VAT registered and you applied DRC when you should not have, you may face a VAT shortfall.
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Ask in Writing Whether the Client Is an End User Do not assume. Ask your client directly — in writing — whether they are an End User for this particular project. Keep their reply. If they tell you they are not an End User (i.e. DRC applies) and it later turns out they were, the responsibility for any VAT shortfall shifts to them, not you — provided you asked and have the evidence.
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Update Your Invoice Template With DRC Wording Build the reverse charge statement into your standard invoice template so it appears automatically on DRC jobs. Many invoicing errors happen simply because the subcontractor used an old template that pre-dates the DRC rules. The wording must appear on the face of the invoice — it cannot be added in a covering email or verbally communicated.
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Plan Your Cash Flow Around Receiving 20% Less On every DRC job, your actual receipt will be the net amount only. If you have materials to buy, subcontractors to pay, or running costs that relied on the VAT float, you need to plan for this gap before the job starts — not when the invoice is paid. Model your cash position on every large job before signing the contract.
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Review Your Recent Invoices for Errors Go back through the last 12 months of invoices to VAT-registered contractors. For each one, ask: should DRC have applied? If you charged standard VAT when you should have applied DRC — or vice versa — you may have VAT errors on your return that need correcting. A voluntary correction made proactively attracts much lower penalties than one discovered by HMRC.
When in Doubt — Apply DRC
The rule of thumb in the industry is simple: if you are a VAT-registered subcontractor doing CIS work for a VAT-registered contractor, apply the Domestic Reverse Charge unless you have clear written evidence that the client is an End User.
Getting DRC wrong in either direction creates problems — but charging standard VAT when DRC should apply is the more common error, and the harder one to defend. If your client queries your invoice because you applied DRC when they expected standard VAT, that is a conversation. If HMRC queries your return because you have been charging VAT that you should not have collected, that is a compliance check.
Review your invoice template today. Add the correct DRC wording. Build the End User question into your client onboarding process. These are ten-minute changes that prevent months of problems.
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This article is for informational purposes only and does not constitute professional VAT or tax advice. VAT rules are complex and fact-specific — always confirm the correct treatment for your specific circumstances with a qualified accountant or VAT adviser. Based on HMRC guidance current as of 2026.