We built our engineering accounting service around how these businesses actually operate, not a generic small business template. Below is what our accounting for engineering clients typically includes, alongside the wider accounting services that keep the books straight day to day.

R&D Tax Relief for Engineering Companies That Design, Test or Improve Products

A lot of engineering work qualifies for R&D tax relief, and most business owners do not realise it. You do not need a finished, working product for a project to qualify. What matters is whether you faced genuine technical uncertainty and had to do real work to solve it, even if the project ultimately failed.

R&D does not need its own department either. For many engineers, it is simply part of the day job: prototyping, testing, redesigning a process, or working out why a component keeps failing under load.

The scale of unclaimed relief is significant. UK businesses reported £46.1 billion of qualifying R&D expenditure for 2023 to 2024, and companies claimed an estimated £7.6 billion in R&D tax relief that year, across roughly 46,950 claims. Manufacturing accounted for 26% of those claims, and professional, scientific and technical activities made up another 19%.

Around 35% of surveyed SME claimants were microbusinesses with fewer than ten staff, and 60% had been trading for more than ten years, so this is not just a start-up incentive. Over half, 57%, said R&D was a regular, ongoing part of how they worked rather than a one-off project. We also support accounting for public or private R&D grants where they apply, alongside broader tax credits your business may be entitled to.

Our tax advisors review your engineering projects, work out what genuinely qualifies for tax relief, and prepare the claim with the documentation HMRC expects to see. Getting tax advisors involved early makes a real difference to the outcome.

Project Costing and Profitability by Contract

Knowing whether a project made money is not the same as knowing whether the business made money. We track job costing, work in progress, and cost-to-complete forecasting so you can see project costs and margin on each contract while it is still running, not six months after it finished.

We work with both fixed-price and materials contracts, and we build reporting around revenue and profit per engineer, so you can see which projects and which people are actually driving operational efficiency and profitability. Our engineering accountants also track material costs separately, since these can swing a project's margin more than labour ever does.

Every engineer working on a fixed price contract needs to know their real margin, not just their invoice total. That is the whole point of tracking it properly.

IR35, Contractor Status and Payroll for Engineering Contractors

As engineering contractor accountants, we know day rates, IR35 status and payroll inside out, because it is genuinely all we do.

If you take on contract engineers, or work as a freelance engineer yourself, IR35 status is not something to guess at. We carry out proper contractor status assessments, help with the employee versus contractor decision, and handle CIS where it applies to your projects.

We also manage National Insurance contributions and payroll for engineering contractors on our books, so nothing falls through the gap between one pay run and the next. Getting this wrong is expensive. Getting it right protects your business and the contractors you work with. This is exactly the kind of work engineering contractor accountants like us handle every week.

VAT, Capital Allowances and Corporation Tax

We handle VAT registration, VAT returns and ongoing VAT compliance, including for engineering firms exporting services or dealing with overseas contracts, foreign currency invoices, and imported machinery or components.

We also claim capital allowances on the equipment you actually use: CNC machines, workshop and production equipment, and CAD or CAE software licences. On the compliance side, we prepare corporation tax returns, identify allowable expenses, and look for legitimate tax relief and tax savings you might be missing, always with an eye on tax compliance and your wider tax position.

We build annual tax planning into the calendar rather than leaving it until the return is due, and we check for tax credits that often go unclaimed.

This is also where broader tax services come in: managing tax liabilities across the year rather than facing one large bill, and building simple business planning into your accounts so growth decisions are based on real numbers.

We support most corners of the industry, including engineering firms, engineering contractors and small businesses working on their own, right through to established manufacturers.

• Engineering consultancies and design firms
• Manufacturing and production businesses
• Self-employed contractors and sole traders needing self assessment tax returns
• Engineering contractors on fixed-term or project-based work
• Renewable energy and specialist technical firms

Whether you assist clients as a sole trader working alone or run a growing limited company with a team of engineers, the accounting problems are the same shape. Only the scale changes, and many engineering firms find that support scales with them rather than against them.

As your business grows, your accounting needs change with it. We support succession planning, financial due diligence, and company structure changes for firms expanding into multiple entities or new markets, including international expansion, whether you trade as a limited company or are considering incorporating one for the first time.

If you are preparing an engineering business for investment or for sale, we prepare the financial data buyers and investors actually want to see, not just historic accounts filed for compliance. Sustainable growth rarely happens by accident. It comes from tax efficiency, proper tax planning, tax credits claimed on time, and data-driven decisions made early, not scrambled together at the last minute.

If you want engineering accountants who understand contracts, R&D tax relief, and project margins without a long explanation first, we would like to talk. That is what accountants for engineers should mean to a business like yours: real knowledge of your world, not a lucky guess.

Proper accounting for engineering firms means understanding contracts before the invoice is even raised.

Get in touch with Vexo Accounting today for a free, no-obligation quote. Tell us about your engineering business, and we will show you exactly how we can help, UK-wide, with specialist engineering accountants ready to support your next project.