NAECI Payroll and Compliance Support for UK Engineering Construction Projects
Large engineering construction projects in the UK often operate under the National Agreement for the Engineering Construction Industry (NAECI).
If your project falls within the scope of this agreement, payroll and employment arrangements must follow specific industry rules that differ significantly from standard UK payroll practices.
For international contractors unfamiliar with the UK engineering construction sector, NAECI can be complex.
We support overseas contractors working on NAECI sites by ensuring that payroll and tax compliance requirements are implemented correctly.
What Is NAECI?
NAECI is the National Agreement for the Engineering Construction Industry, a collective agreement negotiated between employer associations and trade unions.
It governs employment terms for workers on large engineering construction projects in sectors such as:
- power generation
- energy infrastructure
- petrochemical facilities
- major industrial installations
- large-scale manufacturing plant construction.
The agreement sets out standardised rules for pay, allowances, working conditions and contractual benefits.
Many major UK engineering construction sites operate under NAECI.
When Does NAECI Apply?
NAECI typically applies to engineering construction activities carried out on registered sites or projects.
Projects may be registered with the National Joint Council for the Engineering Construction Industry (NJCECI) under different categories, including:
- Category 1 projects – large major projects
- Category 2 sites – established engineering construction sites
- Category 3 events – defined project phases or shutdowns.
Where a project falls within the scope of the agreement, employers working on that site must comply with the NAECI terms.
Why NAECI Payroll Is Different
Payroll for workers operating under NAECI involves additional rules and calculations that do not apply to standard UK payroll. These include:
Negotiated Pay Rates
NAECI sets out industry-negotiated hourly rates for different grades of engineering construction workers.
Travel and Radius Allowances
Workers may be entitled to radius allowances, travel allowances or accommodation payments, depending on their distance from the project site. These allowances must be calculated correctly and treated appropriately for tax purposes.
HMRC Tax Dispensations
Certain travel and subsistence payments may operate under specific HMRC dispensations, meaning they can be paid without tax deductions if the conditions are met.
Contractual Severance Pay
NAECI provides for contractual severance payments when employment ends at the completion of a project or when redundancy arises. Payroll systems must calculate these payments correctly.
Welfare and Pension Contributions
Engineering construction projects often require specific welfare and pension contributions that must be calculated alongside payroll.
The Importance of NAECI-Compliant Payroll
Engineering construction projects are frequently subject to detailed payroll audits.
Incorrect payroll calculations can lead to:
- disputes with workers or trade unions
- delays on site
- compliance issues with HMRC
- additional project costs.
Ensuring payroll is operated correctly from the start helps avoid these risks.
Our NAECI Payroll Support
We understand that operating on a NAECI site requires a specialist payroll approach.
Our team works with international contractors to ensure that payroll processes meet both NAECI requirements and UK tax regulations.
Our services include:
- establishing NAECI-compliant payroll processes
- calculating weekly payroll for workers on engineering construction projects
- applying correct tax treatment to travel and subsistence allowances
- ensuring PAYE, National Insurance and pension calculations are correct
- preparing payroll reports and audit documentation.
We also work closely with project teams to ensure payroll arrangements integrate with the wider tax and compliance obligations of the project, including VAT, CIS and employment tax requirements.
NAECI Projects and International Contractors
Many international contractors working on UK engineering construction projects encounter NAECI requirements for the first time.
This is particularly common in sectors such as:
- power generation and energy infrastructure
- petrochemical plants
- waste-to-energy facilities
- major manufacturing installations.
Understanding the payroll and tax implications early in the project helps avoid disruption once work has begun.
Part of Our Construction Project Tax Support
Our NAECI payroll support forms part of our broader services for international construction and engineering projects in the UK, including:
- VAT for construction projects
- Construction Industry Scheme (CIS) compliance
- payroll for overseas employees
- corporation tax and permanent establishment issues
- customs and import VAT.
Talk to Us About Your Project
If your project operates under NAECI, we can help ensure payroll and tax compliance are handled correctly from the outset.
We regularly support overseas contractors delivering engineering construction projects in the UK.
FAQs
NAECI is the National Agreement for the Engineering Construction Industry, a collective agreement governing pay, conditions and employment arrangements for workers on major engineering construction projects in the UK.
NAECI commonly applies to projects in sectors such as energy generation, petrochemicals, heavy engineering and major industrial installations.
NAECI payroll involves specific rules for pay rates, travel allowances, accommodation payments and contractual severance pay, which differ from standard UK payroll systems.
Yes. If a project site operates under the NAECI agreement, all contractors working on that site must follow the relevant employment and payroll rules.
Large engineering construction projects are often subject to detailed payroll audits to ensure that workers are paid correctly under the agreement.
Payroll for Overseas Construction Workers
If your business is involved in a long-term construction or installation project in the UK.
Income Tax Obligations for Assignees
UK Income Tax Compliance for Non-UK workers on UK Construction Projects.