4 February 2026
By Crystal Boston, Co-Founder
If I had a pound for every time someone said, “My mate said just stick the properties into a company and I’ll save loads of tax,” I could probably buy a rental myself.
On paper, incorporation looks neat, there is a company, lower headline tax rates, full mortgage interest relief and the comforting idea that you are being “tax efficient”.
In reality, this is one of the most oversimplified and badly misunderstood areas of property tax I see.
Incorporation is not a tweak, it is a fundamental change in legal ownership, tax treatment, cashflow and long-term planning.
If the only driver is “I heard I’ll pay less tax,” you are already starting in the wrong place.
Yes, companies can deduct 100 per cent of mortgage interest whereas individuals are restricted to a 20 per cent tax credit.
That’s the bit everyone latches onto.
But tax does not work in isolation, it works as a system, and you have to look at:
I regularly see projections that show “big annual savings” but conveniently ignore the fact that the owner actually needs the rental income to live on.
Tax saved inside a company that you cannot access without another tax charge is not a saving
It is deferral at best.
Once the property sits in a company, it is not “your property” anymore, it belongs to a separate legal person.
Yes, the company may pay less tax on rental profits than you personally, but the moment you want to use that money in your own life, you are back in the tax system again.
You have two main routes:
I often run the numbers and show clients that after Corporation Tax and Dividend Tax, the overall position is not dramatically different from personal ownership, especially for basic and higher rate taxpayers with modest portfolios.
The “huge saving” turns into a much smaller number once you follow the money all the way to their bank account.
This is where the “simple” idea usually falls apart.
Transferring a property to your own company is treated as a disposal at market value. It does not matter that no cash changes hands. The tax system pretends you sold it.
That can trigger an immediate Capital Gains Tax bill and not a small one.
I have seen landlords with long held properties, big gains and very little spare cash suddenly realise they need to find tens of thousands of pounds within 60 days to pay HMRC.
The property has not been sold. There are no sale proceeds. But the tax is very real.
If your plan to fund that bill is “the company will just pay me back later,” you are already in risky territory.
Then there is SDLT, which people forget or underestimate.
The company is buying the property from you and SDLT is based on market value, not what you originally paid.
On residential property, that is already expensive.
Because you are connected to the company, the higher rates for additional dwellings apply.
That extra five per cent hurts, especially on larger portfolios.
I have seen SDLT bills alone wipe out years of projected tax “savings”.
The irony is that the mortgage interest relief is often the main motivation, but the mortgage is also one of the biggest practical obstacles.
Your lender may not allow the transfer. You may have to remortgage into a company product.
Company mortgages are often:
And almost always you will be asked for a personal guarantee anyway.
So, you have moved the property into a company, but the personal risk has not magically disappeared.
This is one of the most misunderstood areas I come across.
Owning property jointly with your spouse does not automatically mean you have a partnership for tax purposes.
HMRC look at whether there is a genuine business carried on in partnership, not just joint ownership.
True property partnerships can sometimes access reliefs that reduce or eliminate SDLT on incorporation.
But HMRC look very closely at this. Paperwork created after the event and backdated partnership agreements do not impress them.
“Become a partnership and wait three years to incorporate to avoid tax.”
This is the classic “three-year rule” myth.
Firstly, property letting is often treated as an investment business, not a trading one. That matters because certain incorporation reliefs only apply to trading businesses.
Secondly, people assume that by putting property into a company they have solved Inheritance Tax.
They have not.
You have just changed what you own from property to shares. The value is still in your estate.
Most importantly, HMRC have powerful anti-avoidance rules.
They can look at a series of steps that have no real commercial purpose other than reducing tax and challenge the whole structure.
I have seen HMRC enquiries where they pick apart years of planning and ask very direct questions about motive.
If you do it properly, declare the gains, pay the SDLT and accept the costs, HMRC are unlikely to object just because you incorporated.
Where problems arise is where people try to be “clever” with artificial partnerships, circular funding or marketed schemes promising tax-free incorporation.
HMRC have issued multiple spotlights on these arrangements, and they are not shy about challenging them.
The financial risk is not just extra tax. It is:
I have seen clients spend five figures on advice and restructuring, only to end up in a position that is no better, and sometimes worse, than where they started.
So, when does incorporation make sense?
Incorporation can be right.
But the reasons tend to be commercial and strategic, not just tax.
For example:
Tax is part of that conversation, but it is not the only one.
My general view is simple. If the only reason on the table is “someone said I’ll save tax,” pause.
Run the full numbers.
Think about cashflow, exits, inheritance, lending and admin.