Construction Invoice Template - UK

Most construction labor and materials are charged at standard rate VAT (currently 20%), but some energy-related materials used in construction qualify for reduced rates (5%). You must list VAT separately on your invoice, clearly showing the VAT amount alongside the pre-VAT subtotal. If you're VAT-exempt, state this explicitly. Materials like energy-efficient boilers installed in new builds may qualify for reduced VAT, so check the specific category of your supply. Always verify current VAT rates with HMRC if you're unsure, as rates can change and some supplies have complex classifications within construction work.

Yes, phased invoicing is standard in UK construction. You can invoice for foundation completion, structural work, trades, and finishing separately as each phase completes, which improves cash flow and tracks progress clearly. Each phase invoice should reference the main contract or purchase order and specify which phase is being billed. Ensure your payment terms remain consistent and that retention amounts (if applicable) are applied to each phase invoice. Include clear descriptions of work completed to help the client match invoices against the agreed project timeline. This method is particularly common for larger projects and maintains clarity for both parties.

Retention is a percentage of invoice value (typically 5-10%) that clients hold back until project completion and defects are resolved, protecting the client against incomplete or faulty work. Show the full invoice value, then separately state the retention amount deducted, so the net payment due is clear. Retention usually becomes payable after a defects liability period expires, typically 6-12 months after practical completion. Document your retention terms in your contract before work begins, and include retention details in your invoice notes to avoid disputes. When the retention period ends, issue a retention release invoice for the held amount—this is standard practice in UK construction.

Issue a separate variation invoice detailing the change, the reason it occurred, and the additional cost or credit involved. Reference the original contract or purchase order number so the client can trace the variation against the original agreement. Include the same detail as main invoices: description of work, quantities, rates, and VAT calculation. Agree on the variation amount with the client before invoicing when possible, as disputes over change order costs are common in construction. Some clients require variation approval before invoicing, so check your contract terms. Variations should be invoiced separately to maintain a clear audit trail for project accounting and prevent scope disputes.

If you're a CIS-registered subcontractor, include your CIS registration number on your invoice. Clients in the construction industry who are CIS-registered will deduct tax at source (typically 20%) from your invoice payments unless you hold a CIS exemption certificate. State clearly on your invoice if you're CIS-registered and whether deductions should apply. The client deducts the tax and pays it to HMRC on your behalf; you claim the deduction back against your tax liability. Non-registered contractors invoice normally, so CIS implications depend on your specific status. Verify your CIS registration status with HMRC before issuing invoices if you work as a subcontractor to avoid payment delays.

Issue your invoice when work is practically complete, but your final payment (particularly retention) doesn't release until after the defects liability period expires, usually 6-12 months later. During this period, the client can report defects or incomplete work that you must remedy at no additional cost. Don't issue a final invoice until defects are resolved and the liability period ends; this protects both parties while giving the client recourse for poor workmanship. Specify the defects liability period length clearly in your contract. After this period expires and all remedial work is complete, issue your final invoice for any retained amounts. This staged payment approach is standard in UK construction.

Yes. Under the Late Payment of Commercial Debts (Interest) Act 1998, you have the right to charge statutory interest if payment is late beyond your agreed terms. The statutory interest rate is 8% plus the Bank of England base rate, though you can specify a different rate in your contract if commercially advantageous. Include your payment terms clearly on the invoice—for example, 'Payment due within 30 days'—so the client knows when payment is expected. If payment is late, send a formal notice before charging interest. Retention holdback is excluded from late payment interest calculations. Document all late payments carefully for dispute resolution and compliance.

You don't need to include insurance details on the invoice itself, but having professional indemnity insurance is essential for UK construction professionals, especially on larger or commercial projects. It protects you against liability claims if your work causes damage or fails. Some larger clients (particularly corporate developers) will require proof of insurance before work begins, not on the invoice. Hold current Public Liability and Employers' Liability insurance at minimum, and keep your insurance policy details accessible for client requests. Insurance certificates should be provided separately during the tender or pre-work stage. This demonstrates professionalism and builds trust, even though it doesn't appear on the actual invoice.