SPV Mortgages in 2026: Are Limited Company Structures Still Worth It?

What an SPV Actually Does (and What It Costs)

Between 2020 and 2023, the advice to hold buy-to-let property inside a limited company special purpose vehicle (SPV) became so widespread that it started to feel less like considered guidance and more like received wisdom. Accountants recommended it. Property podcasters endorsed it. Fellow landlords at networking events treated it as the obvious move. And for many higher rate taxpayers with growing portfolios, it genuinely was the right call.

But some landlords adopted the structure without fully modelling whether it was beneficial for their specific tax position. Now, in mid-2026, with the rate differential between personal and SPV mortgages narrowing for some lender categories and widening for others, the honest answer to whether a limited company structure is still worth it is this: it depends, and the calculation has changed since the advice was first given.

If you set up your SPV two or three years ago and have not revisited the numbers since, this article is for you.

What an SPV Actually Does (and What It Costs)

A special purpose vehicle is a limited company set up solely to hold buy-to-let property. Rental income generated within the company is subject to corporation tax rather than income tax. Crucially, mortgage interest remains fully deductible as a business expense inside the company, which was the primary driver of adoption following the Section 24 restriction that removed personal mortgage interest relief from individual landlords in stages between 2017 and 2020.

The logic was straightforward. A higher rate taxpayer paying 40 percent income tax on rental profits, with no ability to offset mortgage interest as an expense, faced a significantly higher tax bill than a company paying 25 percent corporation tax on the same income with full interest deductibility restored. The SPV became a shelter from a tax change that materially affected profitability.

The trade-off, which was always present but sometimes minimised in early conversations, is threefold.

1. SPV mortgages typically carry a rate premium over equivalent personal buy-to-let products.
2. Extracting profits from the company requires paying dividend tax on top of the corporation tax already paid, meaning the effective tax rate on money you actually use can be higher than it first appears.
3. Running a limited company generates ongoing accountancy and filing costs that do not exist for personally held property.

When the Structure Works and When It Starts to Unravel

The SPV structure is most clearly beneficial for higher and additional rate taxpayers holding multiple properties with sufficient rental income to absorb the operating costs of a company. If your rental portfolio generates meaningful profits, your personal income already keeps you firmly in the 40 percent or 45 percent tax band, and you have four or more properties generating consistent income, the maths is likely to still work in your favour.

It becomes considerably more questionable in three situations.

The first is basic rate taxpayers who adopted the structure based on generalised advice. Section 24 has a far smaller impact on a 20 percent taxpayer than on a higher rate taxpayer. If the tax saving never justified the SPV premium in the first place, the structure may have been costing money from the start.

The second is landlords with small portfolios, typically one or two properties, where accountancy costs as a proportion of rental income are disproportionate. Annual accountancy and filing costs for a limited company can range from £1,000 to £2,500 or more depending on complexity. On a single property generating £10,000 in annual rental income, that overhead is significant before you even factor in the mortgage rate premium.

The third situation arises at the point of sale. When a property held inside an SPV is sold, the company pays corporation tax on any gain. If you then extract the proceeds, dividend tax applies on top. The effective combined tax rate on capital growth can be higher than the capital gains tax rate an individual would pay, particularly following the CGT rate changes that have taken effect since 2024. Landlords who adopted the SPV structure with capital growth as part of their long-term plan should model the exit position carefully, not just the income tax position.

The Rate Premium Has Moved. Have Your Figures?

Here is a concrete example that illustrates why a periodic review matters.

A landlord with a £150,000 buy-to-let mortgage held in an SPV, paying a 0.4 percent rate premium over an equivalent personal product, is paying approximately £600 more per year in mortgage interest than they would on the personal equivalent. If their marginal tax saving from the SPV structure is less than £600 annually, the structure is actively costing them money rather than saving it. That break-even point is not fixed. It shifts every time mortgage rates move, every time lender appetite for the SPV sector changes, and every time the landlord's own income position changes.

In 2025 and into 2026, some lenders have tightened their SPV criteria and increased their rate premiums, while others have moved in the opposite direction as competition in the specialist buy-to-let market has intensified. The SPV premium is not uniform across lenders. It varies materially depending on the lender, the loan-to-value ratio, the interest coverage ratio being applied, and whether the landlord meets the lender's definition of a portfolio landlord. Some specialist lenders who were active and competitive in the SPV space in 2022 have altered their criteria significantly or withdrawn from certain segments of the market altogether.

If you have not had your position modelled against current rates in the last 18 months, the figures used to justify your original decision are very likely out of date.

Why the Review Has Not Happened Yet

There are understandable reasons why many landlords have not revisited this calculation. The original advice was sound at the time it was given. The accountant who recommended the structure has limited commercial incentive to raise the question of whether you should unwind it, and in many cases the accountant is not closely monitoring mortgage rate differentials. The complexity of unwinding a company structure, which typically involves selling properties to yourself at market value and triggering stamp duty land tax and potentially capital gains considerations, means the path of least resistance is to stay put.

There is also a reasonable fear of making a change that triggers unexpected tax consequences. That fear is not irrational. Unwinding an SPV is a serious decision and in many cases is not the right answer even if the ongoing rate premium is hard to justify, simply because the transaction costs of restructuring outweigh the ongoing savings. But not reviewing the position because the review itself feels complicated is a different matter entirely, and it is costing some landlords money every year.

How to Diagnose Your Own Position

The starting point is a conversation with your accountant, with a specific request: model my current tax liability under both personal and SPV ownership at today's mortgage rates, using my actual rental income and personal income figures. That single exercise will tell you whether the structure is still working.

If you have not had this modelled recently, ask the following questions to frame the discussion:

• What is my effective tax saving from holding the property in the SPV rather than personally, at my current income level?
• What is the current rate premium I am paying on my SPV mortgage compared to equivalent personal buy-to-let products available today?
• Are my annual accountancy and company maintenance costs included in the net saving calculation?
• If I were to sell a property from the SPV today, what would the combined corporation tax and dividend tax liability look like compared to personal CGT?
• Have the lenders available to my SPV changed, and is my current product still competitively priced within its own category?

That last point is often overlooked. Even if you are committed to retaining the SPV structure, there is no guarantee that the mortgage product you originally arranged within it remains competitive. A product transfer or remortgage within the SPV category may be available that reduces the rate premium without changing the structure at all.

Where a Mortgage Broker Fits Into This Review

Your accountant can model the tax position. A mortgage broker with genuine buy-to-let expertise can provide the other half of the picture: what is actually available in the market right now, across both personal and SPV categories, and how does your current product compare.

RM Mortgage Solutions works with portfolio landlords across Birmingham, Sutton Coldfield, Tamworth, and the wider West Midlands, and has whole-of-market access to both personal buy-to-let and SPV mortgage products. That access matters because the rate differential between personal and SPV products is not the same at every lender, and the lender that was most competitive for your SPV in 2022 may not be the right choice today.

Working alongside your accountant, we can identify whether your current SPV mortgage is competitively priced within its category, whether a product transfer or remortgage is available at a lower rate within the same structure, and present a clear comparison of what is available across both personal and limited company categories so your accountant has accurate current market data to work with when modelling the tax position. This is not about pushing you toward one structure or another. It is about making sure the structure you hold is at least performing as well as it can within its own terms.

It is also worth noting that the stress testing and interest coverage ratio requirements lenders apply to SPV mortgages differ from those applied to personal buy-to-let products, and in some cases this affects borrowing capacity as well as rate. If you are planning to add properties to the portfolio, understanding how your current structure affects future borrowing capacity is part of the same conversation.

The Right Structure Is Not a One-Time Decision

The Section 24 changes that drove widespread adoption of the SPV structure were a genuine shift in the tax landscape for landlords, and the advice given in response was largely appropriate. But the buy-to-let market in 2026 is not the market of 2021. Rates have moved. Lender appetite has shifted. The corporation tax rate increased to 25 percent in 2023 and has remained there, narrowing the gap between company and personal tax rates for some landlords. Capital gains tax rules have been updated. The calculation is genuinely different now for a meaningful proportion of the landlords who set up SPVs during that period of rapid adoption.

A portfolio finance review is not a concession that the original decision was wrong. For many landlords, the SPV structure remains the right choice, and the review will confirm that. For others, it will reveal that a modest adjustment, whether to the mortgage product within the structure or to the broader approach, could recover several hundred pounds a year in costs that are currently being absorbed unnecessarily.

If you have not reviewed your position in the last 18 months, the cost of not doing so is already accumulating. Contact RM Mortgage Solutions today to arrange a finance review. Bring the conversation to your accountant, and approach it with current market data rather than figures from a market that no longer exists. That is how portfolio landlords make decisions that hold up over time.