Is a Limited Company Buy-to-Let Worth the Extra Cost in 2026?
- 5 days ago
- 9 min read
Understand the real tax savings, hidden costs, and lender requirements before choosing between personal and limited company buy-to-let ownership.
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Key Points
Corporation tax often beats personal tax on rental income
SPV mortgage rates typically sit higher than personal rates
Setup and running costs can offset savings on smaller portfolios
Quick Answer
For higher-rate taxpayers with growing portfolios, a limited company buy-to-let structure often saves money after Section 24 restrictions. Corporation tax at 25% typically undercuts the 40% or 45% personal rate on rental profits. However, higher SPV mortgage rates, accountancy fees, and setup costs mean the structure usually only pays off above a certain rental income threshold, making professional advice essential before committing.
Updated: 18 April 2026
Written by Ben Stephenson, CeMAP-qualified Mortgage Broker, and reviewed by Mortgage Experts.
Manor Mortgages Direct is FCA authorised, FRN 496907, has traded for nearly 30 years, is highly positively reviewed, 4.9 rated on Google, and has helped thousands secure the right mortgage. Bristol-based mortgage brokers, assisting clients nationwide.
Who Is This Guide For
This guide is for landlords and investors weighing up whether a limited company (SPV) structure makes financial sense for their buy-to-let purchases in 2026.
Higher-rate taxpayers who want to keep more rental profit after Section 24
Portfolio landlords considering restructuring under a single SPV
First-time investors deciding whether to buy personally or through a company
Directors or professionals whose day-job income pushes rental profits into the 40% or 45% band
Table of Contents
Why Has Section 24 Pushed So Many Landlords Toward Limited Companies?
Before April 2020, individual landlords could deduct their full mortgage interest from rental income before calculating tax. Section 24 of the Finance Act (2015) phased that relief out entirely, replacing it with a basic-rate tax credit worth just 20% of interest costs. For a landlord paying 40% or 45% income tax, the difference is significant.
The practical effect is straightforward. A higher-rate taxpayer with a large mortgage now pays tax on rental income they never actually receive, because the full interest cost is no longer deductible. HMRC (2024) data shows the number of new SPV incorporations for property holding has risen sharply each year since the final phase of Section 24 took effect.
A limited company, by contrast, is still allowed to deduct mortgage interest as a business expense before calculating corporation tax. That single difference is the reason most landlords are asking the question in this post's title. But the answer depends on far more than the headline tax rate.
How Does the Tax Position Compare for a Higher-Rate Taxpayer?
The comparison hinges on two rates: your personal marginal income tax rate versus the corporation tax rate your company would pay. In the 2025/26 tax year, HMRC (2025) sets corporation tax at 25% for profits above £50,000 (with a small profits rate of 19% below that threshold). Personal income tax runs at 40% for earnings between £50,271 and £125,140, and 45% above that.
A simplified comparison on £30,000 annual rental profit
Personal ownership (40% taxpayer): tax on £30,000 profit = £12,000, minus 20% basic-rate mortgage interest credit. Net tax bill often lands around £9,000 to £10,500 depending on total interest paid.
Limited company: corporation tax at 25% on £30,000 profit (after full interest deduction) = £7,500. If you leave profits in the company, that is your total tax cost.
The catch: extracting profits as dividends triggers a second layer of tax. Dividend tax rates (2025/26) are 8.75% basic, 33.75% higher, and 39.35% additional rate, which narrows the gap considerably.
The real saving materialises when you reinvest profits into further property purchases rather than drawing them out. According to UK Finance (2025), the majority of SPV landlords who report meaningful tax savings are those building portfolios, not those relying on rental income for day-to-day living expenses.
What Are the Hidden Costs Most Guides Don’t Mention?
The tax saving looks compelling on paper, but several recurring costs eat into it. Overlooking these is the most common reason landlords regret incorporating.
Company formation: typically £15 to £50 via Companies House (2026), but a property-specific SPV with the right SIC codes and articles may need a solicitor, costing £200 to £500.
Annual accounts and corporation tax return: a specialist property accountant typically charges £600 to £1,500 per year for a small SPV. This is on top of your personal self-assessment if you still file one.
Confirmation statement: £34 per year to Companies House, due every 12 months.
Higher conveyancing costs: some solicitors charge more for limited company purchases because of additional ID checks and the need to verify the SPV’s articles.
Mortgage product fees: SPV mortgage products often carry arrangement fees of 1% to 3% of the loan, compared with 0.5% to 1.5% on personal BTL deals.
No personal capital gains tax allowance: companies pay corporation tax on gains with no annual exempt amount, unlike individuals who (as of 2025/26) have a £3,000 CGT allowance.
For a single property generating modest rental income, these costs can comfortably absorb the entire tax saving. The breakeven point depends on your tax band, your mortgage size, and whether you plan to grow.
Do Higher SPV Mortgage Rates Wipe Out the Tax Saving?
This is the question most online calculators skip. SPV buy-to-let mortgage rates typically sit 0.3% to 1.0% higher than equivalent personal BTL rates, depending on the lender, LTV, and your portfolio size. On a £200,000 mortgage, that premium adds roughly £600 to £2,000 per year in extra interest.
The Bank of England (Q1 2026) base rate environment matters here. When rates are higher across the board, the absolute cost of that SPV premium is larger. A landlord who runs the numbers during a low-rate cycle may find the equation flips once their fix expires and they remortgage at a higher rate.
The stress test for SPV applications can also be tighter. Many lenders require rental coverage of 145% of the mortgage payment at a stressed rate, compared with 125% for personal BTL at some providers. You can read more about how portfolio landlord criteria work in practice.
Despite the rate premium, the combination of full interest deductibility and corporation tax still favours the SPV structure for most higher-rate taxpayers once annual rental profit exceeds roughly £15,000 to £20,000, though that threshold shifts with every base rate change.
What Do Lenders Actually Look For on an SPV Application?
Lending to a limited company is not the same as lending to you personally, even though most SPV mortgages require a personal guarantee from all directors. Here is what underwriters typically assess.
SPV structure: the company should be a special purpose vehicle with SIC code 68100 (buying and selling own real estate) or 68209 (other letting). Lenders may decline if the company has trading activity unrelated to property.
Personal income: most lenders require at least one director to have a minimum personal income, often £25,000 or more, to demonstrate the ability to cover void periods.
Credit history: personal credit files of all directors and shareholders with 25%+ ownership are checked. Adverse credit on a director can block the application.
Deposit: typically 20% to 25% minimum for an SPV purchase. A few specialist providers accept 15% LTV on limited company BTL, but rates are significantly higher.
Portfolio size: landlords with four or more mortgaged properties trigger the PRA’s portfolio landlord rules. Lenders then require a full portfolio schedule with ICRs on every property.
If you are buying your first investment property and considering the SPV route from day one, the new landlord guide covers the basics of getting started.
Should You Transfer Existing Properties Into a Company?
This is where many landlords hit an unexpected wall. Transferring a property you already own personally into a limited company is treated by HMRC as a sale and a purchase. That means you face capital gains tax on any increase in value since you bought it, plus a fresh stamp duty land tax (SDLT) charge at the higher rates for additional dwellings.
On a property that has risen £100,000 in value, the combined CGT and SDLT bill can easily run into tens of thousands of pounds. Land Registry (2025) data shows average house prices have risen substantially in most regions since 2015, making the transfer cost higher than many landlords expect.
For that reason, most brokers and accountants advise a hybrid approach: keep existing properties in personal names and buy all new acquisitions through the SPV. The FCA’s Consumer Duty (2023) framework requires brokers to ensure advice is in the client’s measurable interest, and a blanket transfer recommendation rarely passes that test.
If you hold properties in a personal name and want to raise capital against them, remortgaging options may offer a more cost-effective route than transferring into an SPV.
Is It Worth It If You Only Own One or Two Rentals?
For a single rental property, the accountancy fees, higher mortgage rate, and formation costs often consume most or all of the corporation tax saving. The numbers typically only start to favour a limited company once annual net rental profit from the portfolio exceeds £15,000 to £20,000, and that figure assumes you are a higher-rate taxpayer.
A basic-rate taxpayer with one or two properties almost never benefits from incorporating. The 20% income tax rate is close to the 19% small profits rate and below the 25% main rate, so the interest deduction advantage is slim. Adding accountancy fees and the rate premium tips the balance firmly against an SPV.
The strongest case for a limited company BTL arises when three conditions overlap: you pay higher-rate tax on your day-job income, you plan to buy multiple properties over the next five to ten years, and you intend to reinvest profits rather than drawing them as dividends. If all three apply, the compounding effect of retained profits taxed at 25% rather than 40% or 45% can be substantial over time.
For landlords exploring multi-unit purchases, the HMO mortgage guide explains how lender criteria differ for houses in multiple occupation.
Pros and Cons at a Glance
Pro: full mortgage interest deduction against rental income
Pro: corporation tax rate (19% to 25%) often lower than personal rate (40% to 45%)
Pro: retained profits compound faster inside the company
Pro: inheritance planning flexibility through share transfers
Con: higher mortgage rates and arrangement fees on SPV products
Con: accountancy, filing, and compliance costs every year
Con: dividend tax applies when you extract profits
Con: transferring existing properties triggers CGT and SDLT
Summary
A limited company buy-to-let structure can deliver meaningful tax savings for higher-rate taxpayers who plan to grow a portfolio and reinvest profits. Corporation tax at 19% to 25% often undercuts the 40% to 45% personal rate on rental income, especially after Section 24 removed full interest relief for individual landlords. However, higher SPV mortgage rates, annual accountancy fees, and the cost of transferring existing properties mean the structure only pays off above a certain income threshold. Speaking to both a specialist broker and a property-focused accountant before committing is the most reliable way to get the numbers right for your situation.
FAQs
Do I need a special type of company for a buy-to-let mortgage?
Most lenders require a special purpose vehicle (SPV) with SIC codes 68100 or 68209 and articles of association that restrict activity to property investment. A standard trading company with unrelated business activity is typically declined for a BTL mortgage.
Can I be the sole director and shareholder of the SPV?
Yes, a single-director SPV is the most common structure for landlords with fewer than four properties. Lenders may ask for a personal guarantee from you as the sole director, and your personal credit file will be checked alongside the company application.
Will my personal credit score affect the SPV mortgage application?
It will. Even though the mortgage sits with the company, lenders check the personal credit history of all directors and any shareholder holding 25% or more. Late payments, CCJs, or defaults on your personal file can result in a decline at the SPV level.
How much deposit do I need for a limited company buy-to-let?
Most lenders require a minimum 25% deposit for an SPV purchase. A small number of specialist providers accept 20% or even 15%, but rates at those higher LTV bands are significantly more expensive. According to UK Finance (2025), the average LTV on new BTL lending sits around 65% to 70%.
Can I claim mortgage interest as a company expense?
Yes. Unlike personal landlords affected by Section 24, a limited company can deduct the full mortgage interest payment from rental income before calculating corporation tax. This is the primary tax advantage of the SPV structure.
Is it worth setting up an SPV just for one property?
Rarely. The annual accountancy fees, higher mortgage rate, and compliance costs typically consume most of the tax saving on a single property. The SPV structure usually becomes worthwhile when annual net rental profit across the portfolio exceeds roughly £15,000 to £20,000 for a higher-rate taxpayer.
Can I use retained profits in the company as a deposit for the next purchase?
Yes, and this is one of the strongest arguments for the SPV route. Profits retained in the company are taxed at corporation tax rates rather than personal rates, so more capital accumulates for the next deposit. Over several purchase cycles the compounding advantage can be significant.
Your property may be repossessed if you do not keep up repayments on your mortgage. Manor Mortgages Direct is a trading name of Ben Stephenson, who is authorised and regulated by the Financial Conduct Authority (FRN 496907). Not all products and services mentioned are regulated by the FCA.
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