BTL Limited Company vs Personal Name in 2026: The Refinance Tax Decision Every Landlord Faces

 UK Finance has forecast that around 1.8 million fixed-rate mortgages will mature across 2026, the largest refinance window of the decade. Landlords land in a tax environment where Section 24 has fully bitten, where the SDLT additional dwelling surcharge has been hiked from 3 to 5 per cent, and where Section 162 incorporation relief now requires a manual claim. On corridor pricing in the North East, the case for the limited company structure looks materially different to the case in most of the South East.

The refinance wave has arrived.

UK Finance has forecast that around 1.8 million fixed-rate mortgages, residential and buy-to-let, will mature across 2026. That figure has been quietly mentioned in the trade press for over a year. Now it is happening, week by week, lender by lender, every Monday morning.

For owner-occupiers, the conversation is mostly about whether they can afford the new monthly payment. For property investors, it is about something else entirely. It is about whether the structure you bought into in 2020 or 2021 is still the right structure to refinance into in 2026.

Best 2-year BTL fixes sit around 3.19 per cent at the time of writing. Best 5-year fixes sit around 3.93 per cent. The rates are not the headline. The headline is the tax position you refinance into, because that is what determines whether the deal still pays you, or whether it now costs you.

That is the personal name versus limited company question. And in the North East corridor, it answers differently to the way most national commentary frames it.

What Section 24 actually costs you on a real deal

Take a worked example. A North East BTL bought in personal name in 2021. Purchase price £140,000. 75 per cent LTV interest-only mortgage. Monthly rent £750. Mortgage interest cost on the new fix at 3.93 per cent runs at roughly £4,128 per year.

Under the pre-2017 rules, you would deduct that £4,128 from rental income and pay tax on the remainder. Under Section 24, in force at 100 per cent restriction since April 2020, you do not. The £4,128 is taxable as if it were profit you actually received, against a 20 per cent basic rate credit worth £826 per year.

The table below shows the same property held in personal name and through a limited company.

Illustrative worked example. Actual figures depend on your tax position, lender, mortgage product, and accounting choices. Personal-name uses higher-rate income tax at 40 per cent before the 20 per cent basic rate credit. Company uses the 19 per cent small profits corporation tax rate after mortgage interest deduction.

Multiply that gap across a portfolio of three, five, ten properties. Add the new fix at 3.93 per cent on top of an old fix at 2.1 per cent. The refinance is not just a higher monthly payment. It is the moment Section 24's full bite finally lands.

The limited company alternative

Limited companies, including the most common structure, the Special Purpose Vehicle or SPV, remain exempt from Section 24. Inside a company, mortgage interest is deducted as a full business expense before corporation tax is applied.

Corporation tax sits at 19 per cent on company profits up to £50,000, the band most KLAP-typical SPV holdings sit comfortably inside. Interest Coverage Ratios are also more favourable for SPV lending: 125 per cent typically, versus 140 to 145 per cent for personal applications by higher-rate taxpayers. And the SPV mortgage rate premium, once 0.7 to 1.0 percentage points above personal rates, has narrowed to as little as zero on some 2026 products.

For higher-rate and additional-rate taxpayers building or refinancing a portfolio in 2026, the limited company case usually wins on paper. But that is not the whole picture.

The North East refinance advantage

The tax structure conversation does not happen in a vacuum. It happens against the underlying economics of the property you are refinancing into. That is where the corridor changes the answer.

A typical Middlesbrough TS1 or TS3 terrace sat at £76,000 to £85,000 in early 2026, with the strongest streets producing gross yields above 8 per cent on a single-let basis. The average Hartlepool house price was £132,000 in late 2025. County Durham averaged £138,000 in January 2026. Sunderland averaged £145,000 in February 2026. Stockton family lets sit higher at around £193,000.

That price band changes two things in the structure conversation.

Section 24 hurts less in absolute pounds. A £140,000 corridor BTL at 75 per cent LTV carries around £4,128 of annual interest at current fixes. The same property in the South East at £350,000 carries closer to £10,300. The Section 24 exposure on the South East deal is roughly two and a half times larger, and the higher-rate taxpayer is two and a half times more exposed on every single property.

The SPV case is structurally stronger at corridor yields. North East rental yields ran at 6.5 per cent for the year to March 2026, the highest of any English region. More rental income falling into a structure where mortgage interest is fully deductible means the gap between personal name and limited company widens in absolute pounds for every additional percentage point of yield.

In plain terms, the corridor produces deals where the SPV case is easier to defend than the case in most of the South East, and the SDLT surcharge cost is materially smaller because the purchase price is materially smaller. For many higher-rate taxpayers, the additional SDLT cost on corridor pricing can often be recovered over a relatively short period through Section 24 tax savings. On a higher-priced South East property, the same surcharge represents a meaningfully larger upfront cost that takes considerably longer to amortise.

The friction nobody talks about

SDLT. Buying a BTL through a limited company attracts the Additional Dwelling Surcharge, raised from 3 to 5 per cent in October 2024. On a £100,000 property, that is £5,000 of upfront SDLT instead of £3,000. On a £200,000 property, £14,750 instead of £8,750.

Profit extraction. Cash inside a company is not the same as cash in your pocket. Dividend tax applies when you extract. Irrelevant if you are reinvesting inside the structure. Meaningful if you need the rental income to live on.

Set-up and ongoing cost. Annual accounts, Companies House filings, and accountancy fees of typically £700 to £1,500 a year per company. For a single property, disproportionate. For a portfolio of three or more, a footnote.

The April 2026 change most landlords have not yet read

Section 162 of TCGA 1992 is the mechanism that has let landlords transfer an existing property business into a limited company without triggering CGT at the point of transfer. The gain rolls into the value of the company shares rather than crystallising at incorporation. For five or ten property portfolios, Section 162 has been the difference between an affordable restructure and an immediate six-figure CGT bill.

Two things have changed on 6 April 2026, and they are worth keeping separate.

The claim process. Under Finance Bill 2025-26, Section 162(1) now requires the transferor to make a claim on the return for the year of transfer, with such information as HMRC require. Before 6 April 2026, the relief applied automatically if the conditions were met. From now on, it must be claimed.

The genuine business test. This has not changed in April 2026. The standard sits in case law (Ramsay v HMRC 2013): the portfolio must be operated as a genuine business with significant time and effort applied. HMRC and advisers often look for evidence of significant and regular involvement in the business, supported by activity logs, tenant management records, and maintenance records. What has changed is HMRC focus, now that manual claims sit on the return.

The combined effect. Buying the next property through a new SPV is still straightforward. Moving the existing personal-name properties across to that SPV under Section 162 is more administratively demanding than it was three months ago.

The operator reality in 2026

We are increasingly seeing landlords across Middlesbrough, Stockton, and Hartlepool arrive at refinance reviews expecting the conversation to be about rates, and discovering that the real issue is tax structure. Three conversations we are having on repeat, each one at a different stage.

The one-property landlord. Personal name. Bought in 2020 or 2021. Coming off a sub-2 per cent fix into something around 3.93 per cent. The Section 24 cost on a single deal at corridor entry prices is modest. The SDLT cost of moving is real. For most one-property landlords in this position, the answer is staying personal name, refixing the mortgage, and using the next acquisition as the moment to set up an SPV if they decide to grow.

The five-property landlord. Mixed structure already. Some personal name, some SPV. The refinance wave is hitting at least two of the personal-name properties this year. This is where the new Section 162 process actually bites. Most operators in this position are absorbing the higher tax on the personal-name refinances, growing the SPV side by acquisition, and letting the dual structure run rather than restructuring this year.

The twenty-door portfolio builder. Already in the SPV. The refinance question is about leverage strategy and which lender holds the next acquisition, not about structure. The live conversation at this scale is cross-collateralisation, portfolio-level loan covenants, and the operational discipline of keeping clean accounts across multiple SPVs.

A framework for the decision

You probably stay personal name if. You are a basic-rate taxpayer with one or two properties. Portfolio unlikely to grow beyond five. You need the rental income to live on. The Section 24 cost on your position is modest and the SDLT cost of moving across would take years to repay.

You probably go limited company if. Higher-rate or additional-rate taxpayer. Planning to grow the portfolio meaningfully over the next five years. Building wealth inside the structure rather than extracting it monthly. Next acquisition is months away rather than years.

The mixed structure if. You hold existing properties in personal name and accept the new Section 162 evidence bar makes moving them harder. You buy your future acquisitions through a new SPV. The personal portfolio amortises down naturally and you live with the dual structure rather than fighting it.

Walking away if. The numbers do not work in any structure. Over-leveraged into a refinance you cannot stress-test at higher rates. None of these is a tax structure problem. They are portfolio problems and they need addressing on their own terms.

What to do this quarter

One. Run the after-tax numbers on every property at the new fix rate and your current personal tax band. Section 24 only shows up in the after-tax figure.

Two. Speak to a qualified tax adviser before you sign the new fix. Structure has a five to ten year tail. The mortgage is a two or five year commitment. Make them together.

Three. If you are growing the portfolio in the next 24 months, model the next acquisition under both structures with the new SDLT surcharge applied. On corridor pricing, the surcharge payback period is materially shorter than most national commentary assumes.

What this means for you

If you are sitting at this decision and would like an operator perspective rather than a tax-adviser perspective, the most useful thing we can offer is a 30 minute conversation about where your portfolio is today and where the next deal sits across the corridor.

If you want the underlying sourcing system in writing, the full framework is in The Property Deal Finder's Handbook on Amazon.

For a weekly briefing on the regulatory, market, and structural shifts shaping the corridor, sign up at klappropertygroup.com.

keeshan@klappropertygroup.com  |  07908 745 922  |  klappropertygroup.com

A note on what this piece is

The above is operator perspective grounded in current published rates and regulation as at June 2026. It is not personal tax advice. Any decision to incorporate, restructure, or refinance should be made together with a qualified tax adviser and a qualified mortgage broker.

Sources

UK Finance mortgage maturity forecasts for 2026 (cited Mortgage Finance Gazette, 15 December 2025). GOV.UK Capital Gains Tax: Incorporation Relief claims process and Finance Bill 2025-26 amending TCGA 1992 s.162(1). Ramsay v HMRC (2013) on the genuine business test. ONS housing prices and private rents indices, December 2025 and January to March 2026 releases. HMRC corporation tax bands FY April 2026. SDLT additional dwelling surcharge rates as amended October 2024.

Frequently Asked Questions

What is Section 24? It removes the right of individual landlords to deduct mortgage interest before calculating tax. In force at full restriction since April 2020.

Should I use a limited company or personal name for buy to let in 2026? Depends on your tax band, portfolio size, and whether you need to draw the income. Higher-rate taxpayers building a portfolio generally benefit from a limited company. Speak to a qualified tax adviser.

What is an SPV? A Special Purpose Vehicle is a limited company set up solely to hold investment property. Mortgage interest is fully deductible inside it, which removes the Section 24 restriction.

What changed with Section 162 incorporation relief in April 2026? It no longer applies automatically. From 6 April 2026 you must make an active claim on your tax return. If you are considering transferring a portfolio into a company, take advice before acting.

What is the SDLT additional dwelling surcharge in 2026? Five per cent on top of standard SDLT, raised from 3 per cent in October 2024. Applies in personal name and limited company equally.

Is the limited company structure worth it for North East properties specifically? Generally stronger than the national picture suggests. Lower purchase prices mean a smaller SDLT cost to recover. Higher yields mean the tax saving inside the structure is proportionally larger.

What BTL mortgage rates are available in 2026? Best 2-year fixes around 3.19 per cent, best 5-year fixes around 3.93 per cent at time of writing. Confirm current rates with a qualified mortgage broker.