If you’re working in construction, you know that cash flow isn’t just a metric on a spreadsheet, it’s the oxygen your business breathes. And for most established sub-contractors and firms, the "Gross Payment Status" (GPS) is the tank that keeps that oxygen flowing.
But as of April 6, 2026, HMRC has officially tightened the leash. If you aren't careful, they won't just pull on that leash; they’ll take the collar off and send you to the doghouse for five years.
I’m Tim Hammond, owner of Makes Sense Accountants, and I’ve seen a lot of changes in the Construction Industry Scheme (CIS) over the years. But these new powers? They are a game-changer. We’re moving away from the era of "warnings and polite letters" into an era of "suspect first, ask questions later."
Let’s break down what’s actually happening and why your business might be more at risk than you think.
What is GPS and Why Does HMRC Care?
Before we dive into the scary stuff, let’s quickly recap why we’re even talking about GPS. Gross Payment Status allows a sub-contractor to be paid in full by a contractor without any tax being deducted at source. Without it, you’re looking at a 20% (or even 30%) deduction right off the top of every invoice.
For a business with tight margins, losing GPS means you’re essentially giving HMRC a massive interest-free loan while you struggle to pay your own lads, your suppliers, and your plant hire.
HMRC cares because CIS fraud is big business. Whether it’s "ghost" sub-contractors or complex chains designed to disappear before paying VAT or PAYE, the construction industry has always been under the microscope. The problem is that, until now, HMRC often felt they were playing catch-up. These new 2026 rules are their way of getting ahead of the game.
The "Knew or Should Have Known" Test
This is the biggest shift in the new legislation. In the past, to strip you of your GPS, HMRC usually had to prove that you were the one committing the fraud. You had to be the "bad guy."
From April 6, 2026, that’s no longer the case. HMRC can now immediately pull your GPS if they even suspect a link to fraud. This is known as the "knew or should have known" test.
What does that actually mean in plain English? It means if a company three links down the supply chain from you is involved in a tax scam, and HMRC thinks you should have spotted something fishy, you are on the hook. They don’t have to prove you were in on it. They just have to argue that a "reasonable" business owner would have noticed the red flags.
This puts a massive burden on you to do your due diligence. You aren't just responsible for your own books anymore; you’re effectively being asked to police your entire network.
The 30% Sting: It’s Personal Now
For a long time, if a company got into trouble with HMRC, the directors could sometimes hide behind the "limited liability" shield. If the company went bust under the weight of penalties, the directors could often walk away and start again.
Not anymore.
Under the new rules, if HMRC finds a link to CIS fraud, they can slap a 30% penalty on the business. But here’s the kicker: they can also pursue the directors personally.
This means your house, your savings, and your personal assets are potentially on the line. It’s a move designed to stop "phoenixing" (where a company shuts down and reopens the next day under a new name) and to make sure directors take compliance seriously.
At Makes Sense Accountants, we’ve always told our Ltd Company clients that being a director comes with responsibilities, but this takes it to a whole new level.
The Five-Year Ban: A Death Sentence for Cash Flow
Historically, if you lost your GPS because you missed a few filings or made a mistake, you could usually reapply after a year. It was a painful year, but most businesses could find a way to survive the 20% deductions if they tightened their belts.
The 2026 rules have changed that one-year "time out" into a five-year ban.
Think about that for a second. Could your business survive five years of having 20% of your gross income withheld? For most construction firms, the answer is a flat "no." Five years is long enough to lose your best contracts, lose your best staff, and ultimately lose your business.
This change is specifically targeted at anyone HMRC suspects of being involved in, or even just being adjacent to, fraudulent activity. It’s no longer a slap on the wrist; it’s a total lockout from the gross payment system.
Why "Suspicion" Is the New Standard
You might be thinking, "Well, I’m not doing anything wrong, so I’m fine."
In an ideal world, you'd be right. But "suspicion" is a very low bar. HMRC's new powers allow them to act first and investigate later. If they see a pattern of behavior in your supply chain that looks like a known fraud model, they can yank your GPS immediately to "protect the revenue."
You then have to fight to get it back, which can take months of legal back-and-forth: all while you’re being paid net and struggling to keep the lights on. This is why having your Accountancy and Tax records in perfect order is more important than ever.
How to Protect Your Business (and Yourself)
So, how do you stay on the right side of the leash? You need to move beyond basic bookkeeping and start thinking about "compliance as a defense."
1. Know Your Subbies
You can’t just take a sub-contractor’s word for it anymore. You need to verify them through the CIS system every single time. But more than that, look at the deals they are offering. If a price seems too good to be true, it probably is. If they are asking for payments in a weird way or using multiple bank accounts, those are the "red flags" HMRC expects you to catch.
2. Tighten Your Paperwork
If HMRC comes knocking and asks why you didn't suspect fraud in your supply chain, you need to show your workings. Keep records of the checks you’ve done. Use digital tools to track your Making Tax Digital requirements and ensure everything is filed on time.
3. Regular Health Checks
Don't wait for a letter from HMRC to find out there’s a problem. Regular audits of your CIS processes are essential. This is exactly where we help our clients. We look at your systems through the eyes of an HMRC inspector to find the gaps before they do.
4. Directorial Awareness
If you are a director, you need to be actively involved in the financial oversight of the company. "I didn't know the bookkeeper was doing that" is no longer a valid defense. With personal liability on the table, you need to be certain that your CIS processes are airtight.
The Role of Professional Advice
The construction industry is already complex enough without having to worry about becoming an amateur detective for HMRC. Between VAT registration requirements and the ever-changing landscape of Tax Investigations, there’s a lot to juggle.
At Makes Sense Accountants, we specialize in taking that weight off your shoulders. We understand the grit and reality of the construction sector. We know that you’d rather be on-site or winning the next big contract than staring at CIS return forms.
But with the April 2026 rules, "winging it" is no longer an option. The risk to your personal wealth and your company’s future is simply too high.
Don't Get Hit with a Nasty Surprise
The 2026 CIS fraud rules are some of the most aggressive we’ve seen from HMRC in a long time. By lowering the threshold for removing GPS and increasing the penalties for directors, they are sending a clear message: the leash is short, and they aren't afraid to pull it.
If you’re a sub-contractor or run a construction firm, now is the time to act. Don't wait until you get a notification that your Gross Payment Status has been revoked. By then, it’s often too late to avoid the five-year ban.
Stay compliant, stay gross, and stay in business.
Need a hand making sure your CIS processes are up to scratch?
Contact Tim and the team at Makes Sense Accountants for a full health check on your CIS processes. We’ll help you navigate these new rules so you can focus on the job at hand without worrying about HMRC yanking your leash.
Fill out our contact form here to get started: https://www.msaccounts.co.uk/contact