“How difficult can it be? I’ll just do it myself.” It’s a phrase we hear a lot from new construction business owners, usually not long before the fines start arriving.
This is the story of a typical company. Everything discussed below happened to real limited companies in construction, set up with good intentions and real graft behind it, that ran into serious trouble not because the owner lacked drive, but because payroll, CIS and VAT are far more involved than they appear from the outside.
Why go limited in construction in the first place
Before we get to the mistakes, it’s worth saying why limited status is usually the right option for construction start-ups. Trading as a limited company protects your personal assets if a project goes wrong, a client disputes payment, or a subcontractor makes a claim. It gives you a more credible standing when tendering for larger contracts or working with main contractors who prefer to deal with registered companies. It can also be more tax efficient once profits reach a certain level. The trouble is, going limited also brings a set of duties that sole traders don’t have to think about, and that’s exactly where this story runs into difficulty.
Mistake one: payroll without a plan.
The company took on its first labourer and registered for payroll without any real issue. The trouble started when it came to running it month to month. Without training on the software, the owner guessed the figures. The result was an overpaid employee, late filing with HMRC, and pension contributions under auto enrolment that were neither deducted nor paid over on time.
Mistake two: the CIS box nobody explained.
While setting up payroll, the owner ticked the box to register for the Construction Industry Scheme, as most builders and subbies must. What wasn’t explained was that CIS comes with its own ongoing duties: verifying every contractor before paying them and submitting monthly returns even when there’s nothing to report. Neither happened, and a fine for non-filing followed.
Mistake three: the wrong deduction rate.
As a subcontractor himself, the owner never applied for standard 20% payment status. Instead, contractors deducted the default 30% from every invoice. For a new construction company, when cash flow is often the tightest thing you’re managing, that extra 10% held back on-site work made a real difference to what came through the door.
Mistake four: VAT set up out of step.
VAT registration went ahead, but the quarters didn’t match the company’s year-end, and no direct debit was set up for payments. Neither is a disaster alone, but together they added friction and risk of missed payments right when the business could least afford it.
Mistake five: bookkeeping without a foundation.
The software itself was set up without any training. CIS invoices were entered incorrectly and weren’t showing VAT properly, so the books didn’t reflect what was actually happening on site or in the bank.
The real cost of going it alone.
None of these mistakes came from carelessness. They came from a lack of guidance at the exact moments it mattered most: at registration, on the first invoice, on the first payroll run. By the time we became involved, the job wasn’t just bookkeeping. It was training, correcting, and building the processes that should have been there from day one, so the company could keep building, compliant and fine free.
If you’re starting a construction company and thinking “how difficult can it be”, the honest answer is: more difficult than it looks, and usually more expensive to fix than to get right first time. Book some time with me through my Calendly link and we can work through your company set up together.
