Civil and structural engineers working as self-employed subcontractors in construction operate in one of the most technically demanding corners of the CIS scheme. Heavy civil works, infrastructure contracts, plant hire and materials supply all create a complex deduction picture. Getting it right matters more as earnings grow.
Civil engineering work often involves significant plant hire costs (excavators, dumpers, piling rigs) and materials (aggregates, concrete, steel, geotextiles). Both are excluded from the CIS deduction base when passed on to the main contractor. Verifying the deduction base is correct requires careful review of each deduction statement.
Much civil engineering work is on public sector infrastructure projects: roads, drainage, utilities, flood defences. These are typically subject to CIS in the usual way. Main contractors on public sector projects are often large organisations with complex verification and payment processes. Staying registered, verified and compliant with your CIS return obligations is especially important at this scale.
ICE, CIOB or other professional body membership fees, CPD training costs and professional indemnity insurance are all allowable expenses. Civil engineers with professional qualifications often have significant annual professional costs that are underchimed.
We review your deduction statements, verify the deduction base including plant hire and materials, claim all professional and expense allowances, and submit your Self Assessment return.
Civil engineering contractors with net CIS turnover over £30,000 can apply for GPS. We manage the application and the three compliance tests: business, turnover and compliance.
For civil engineers earning at higher income levels, a CIS-registered limited company allows real-time reclaim of deductions via EPS submissions. We model the comparison for your specific situation.
“I had been filing my own returns for years. Nobody had told me I could exclude plant hire from the deduction base or that my professional fees were allowable. The catch-up refund was significant.”
Composite snapshot based on client patterns. Name and figures anonymised. The tax mechanics are real.
Book a free call. We will talk through your CIS position, your deduction history and whether there is anything worth changing. No hard sell, no obligation.
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