It usually starts with a quiet worry.
Your turnover is climbing. You can see the VAT threshold getting closer. Someone mentions that if you open a second business and split the income, you might be able to keep both under the limit.
It sounds simple. Sensible, even.
But this is where you need to slow down.
In many cases, trying to avoid VAT by opening a second business does not solve the problem. It creates a new one. HMRC can look at whether the arrangement is really two independent businesses or one business split artificially, and if they decide it is artificial, they can combine the turnovers and require VAT registration.
Why people try to split a business to avoid VAT
Usually, this is not about trying to be clever with tax.
It is about fear.
There is a worry that adding VAT will push prices up and clients will leave. This is especially common in service-based businesses where customers are individuals or small businesses that are not VAT registered.
There is also a lot of confusion around what VAT actually means. Many business owners assume VAT automatically means less profit. In reality, VAT is a tax businesses collect and account for to HMRC, so the practical impact is often more about pricing, systems and cash flow than the simple loss of profit people imagine. HMRC’s VAT registration guidance is built around taxable supplies and registration obligations rather than the idea that VAT itself changes the underlying economics of the work.
And then there is the psychological barrier.
The VAT threshold can feel like a ceiling. Staying below it can feel safer than growing beyond it.
That is why the idea of “just opening another business” feels attractive.
But HMRC does not just look at the paperwork.
They look at the commercial reality.
What HMRC means by artificial separation
If you are wondering whether you can avoid VAT by opening a second business, this is the key concept to understand.
HMRC is interested in substance over form. In simple terms, they want to know whether there are genuinely two separate businesses, or one business that has been split in two on paper.
HMRC’s guidance on disaggregation says they can act where activities have been artificially separated and that separation results in avoidance of VAT. They look at whether there are financial, economic and organisational links between the supposedly separate businesses.
That means HMRC may question arrangements where businesses:
- are controlled by the same person or connected people
- operate from the same premises
- use the same branding
- share staff or resources
- serve the same client base
- depend on each other financially
Those are the kinds of links HMRC uses when considering whether what looks like two businesses is really one.
What happens if HMRC decides the split is artificial?
If HMRC believes a business has been artificially separated, they can direct that the businesses be treated as a single entity for VAT registration purposes. That can lead to the combined turnover being assessed against the VAT registration rules.
In practice, that can mean:
- the turnovers are combined
- VAT registration is treated as having been required
- registration may be backdated
- interest and penalties may apply
HMRC’s compliance guidance also makes clear that a failure to notify liability to register can trigger penalties.
So what looks like a simple workaround can become an expensive mistake.
Example: opening a second business to avoid VAT
Imagine Seb runs a coaching business. His turnover is rising steadily and approaching the VAT threshold.
Rather than register for VAT, he sets up a second limited company offering “training and workshops”. He invoices some clients through one entity and some through the other. It is the same expertise, the same person, the same home office, the same website and broadly the same client base.
On paper, there are now two businesses.
But if HMRC looked at that arrangement, they would not stop at the invoice headers. They would look at whether these are genuinely separate economic activities, or whether the trade has simply been split to avoid registration. Based on HMRC’s published approach to disaggregation, an arrangement with shared control, overlapping activity and clear economic links would be vulnerable.
What triggers HMRC to look into this?
There is not always a dramatic investigation.
Often, it is patterns that raise questions.
For example:
- two connected businesses sitting just below the threshold
- shared addresses
- similar trading names
- overlapping directors or ownership
- movement of funds between the businesses
- one business appearing dependent on the other
HMRC’s manuals focus on the financial, economic and organisational links between the entities rather than the simple fact that separate legal entities exist.
The key point is this: if the arrangement exists mainly to avoid VAT by opening a second business, and there is no real commercial separation, it is risky.
Does switching from sole trader to limited company avoid VAT?
This is another common question.
Sometimes business owners think they can stop trading as a sole trader and restart through a limited company to reset the VAT position.
Changing legal structure can absolutely be the right move for other reasons. But it does not automatically wipe the slate clean for VAT.
HMRC’s guidance on transfers of a going concern makes clear that where a business is transferred as a going concern, VAT registration consequences can follow the business into the new entity. HMRC also notes that taking over a business can create a liability to register for VAT.
So if you transfer the same trade, clients and activity into a new company, you cannot assume the VAT clock simply restarts at zero.
The structure may change. The underlying business may not.
A better question: how do I grow beyond the VAT threshold well?
Instead of asking, “How do I avoid VAT?”, the more useful question is:
How do I build a business that can operate comfortably beyond the VAT threshold?
The threshold is not a finish line. It is not something to fear. In many cases, reaching it simply means the business is growing.
For many owners, VAT registration marks a shift in mindset. You stop trying to stay under a ceiling and start building something with room to grow.
That often means looking properly at:
- pricing
- margins
- positioning
- bookkeeping
- cash flow processes
VAT registration can also allow a business to reclaim VAT on eligible costs and overheads, which becomes more relevant as the business grows and expenses increase.
Why trying to stay under the threshold can hold a business back
When owners focus too heavily on avoiding VAT, they sometimes start making distorted decisions.
They may price cautiously.
Limit turnover deliberately.
Delay opportunities.
Resist growth that would otherwise be healthy.
That mindset can quietly cap ambition.
Growth requires structure, confidence in your numbers and willingness to build beyond artificial ceilings.
That is why the goal should not be to avoid VAT by opening a second business.
The goal should be to understand the rules properly, avoid arrangements HMRC may see as artificial, and build a business that is commercially strong enough to grow past the threshold with confidence. HMRC’s own disaggregation rules are specifically designed to stop artificial separation from resulting in avoidance of VAT.
If you are approaching the VAT threshold, it is understandable to feel cautious.
But opening a second business purely to avoid VAT is rarely the clean solution people hope it will be.
HMRC looks at the substance of the arrangement, not just the legal labels. If the businesses are not genuinely separate, the turnovers can be combined and VAT registration can still be required.
The better route is usually not avoidance.
It is building a pricing model, margin structure and finance setup that allows the business to grow beyond the threshold properly.
