CIS Invoice Template - UK

Construction Industry Scheme deductions are typically 20% for contractors if the subcontractor is verified as compliant, or 30% if unverified. The contractor is responsible for applying the correct deduction to your invoice amount before payment. You should confirm the applicable rate with the main contractor when negotiating the contract, as some schemes use different percentages. Always retain proof of the rate agreed, and ensure your CIS invoice clearly shows the deduction amount calculated so both parties have clarity on the final payment due.

Subcontractor verification with HMRC determines your CIS deduction rate. Unverified subcontractors face the standard 30% deduction, while verified subcontractors typically qualify for 20%. To apply for verification, you'll register for CIS, prove your identity and business legitimacy, and demonstrate compliance with tax and employment obligations. HMRC processes verification applications within a few weeks. Verification status appears in your CIS registration details and contractors can check it before deducting. Most established subcontractors pursue verification to reduce the deduction impact on their cash flow and improve competitiveness on bids.

Under the Construction Industry Scheme, VAT treatment depends on your CIS status. If you're a verified subcontractor or contractor, you can charge VAT on your invoices separately from the CIS deduction. The contractor deducts CIS from your net invoice amount before VAT is added. If unverified, the situation may differ, so clarify this beforehand. Always register for VAT once your business reaches the threshold, and show VAT separately on your CIS invoice. Contractors need both figures to calculate correct payments and process their own CIS reporting to HMRC accurately.

CIS applies to most construction and construction-related services, including demolition, site preparation, foundation work, structural installation, roofing, plumbing, and electrical work. However, design services, professional advisory work, and supply-only transactions (without installation labour) typically fall outside CIS. Materials and labour must be inseparable for CIS to apply. If you're uncertain whether specific work qualifies, confirm with the main contractor before invoicing, as misclassification can cause payment delays and compliance issues. Your CIS invoice should clearly itemize labour-intensive services to demonstrate what CIS rules apply to.

CIS registration is separate from standard business registration and is not automatic. If you operate as a subcontractor in construction and exceed £3,000 in contract value within a tax year, you must register for CIS with HMRC. Registration is mandatory; operating without it while performing CIS-eligible work can result in penalties. You register through HMRC's online CIS service or by post. Once registered, you receive a CIS reference number required on all invoices. Registration directly affects how you report income and pay taxes, so timing your registration correctly matters for your tax position.

Contractors report CIS deductions to HMRC monthly and must pay you within a reasonable timeframe as per your agreed contract terms—typically between 14 and 30 days. However, the contractor's monthly CIS return deadline to HMRC (usually the 19th of the following month) can influence payment timing in practice. CIS deductions impact your cash flow significantly, as you only receive the net amount. Plan your working capital accordingly, especially for large projects with longer cycles. Clarify payment terms in your contract before work begins and track CIS payments separately to manage cash flow effectively.

Contractors are responsible for deducting CIS from subcontractor payments and reporting these deductions to HMRC monthly. They must verify subcontractor status before determining the correct deduction rate. Subcontractors (like tradespeople and labour-only providers) receive deductions applied to their invoices and must comply with CIS registration and reporting requirements. Subcontractors report their CIS-deducted income to HMRC annually through their tax return. Understanding your role determines how you complete your CIS invoice correctly. If you're uncertain which category applies to your business, clarify this with HMRC before invoicing to avoid compliance issues.

Common mistakes include incorrect CIS deduction calculations (wrong percentage or amounts), missing required information like contractor CIS reference or subcontractor UTR, and VAT calculations mismatched to CIS deduction amounts. Invoices without clear labour versus materials breakdown confuse deduction eligibility. Failing to notify the contractor of status changes causes deduction rate errors. Dating invoices incorrectly relative to the tax month complicates monthly reporting. Review your CIS invoice before sending to catch calculation errors, verify all required fields are complete, and retain detailed records of every deduction applied to protect yourself during audits.