UK Buy-to-Let Through a Limited Company Explained

Why company ownership is used

Limited company ownership became popular among UK landlords after Section 24 phased in from 2017. Inside a company, mortgage interest is fully deductible against rental income before corporation tax, restoring the pre-2017 economics for higher-rate taxpayers.

Corporation tax rates

From April 2023, UK corporation tax on profits is 19 percent up to GBP 50,000 of taxable profits, marginal relief between GBP 50,000 and GBP 250,000, and 25 percent above GBP 250,000. The bands apply at the company level, so each separate company has its own bands.

Extracting profit

Profit in the company is taxed twice: once as corporation tax, then again on extraction. Dividend extraction attracts dividend tax above the GBP 500 dividend allowance, at 8.75, 33.75, or 39.35 percent depending on the shareholder's income band. Salary attracts income tax and NI.

The double-tax friction is offset for portfolios accumulating wealth inside the company. Profits retained for further property purchases avoid extraction tax until eventually paid out as dividends, sale proceeds, or on liquidation.

Mortgage costs

Limited company buy-to-let mortgages typically carry slightly higher interest rates than personal-name equivalents, reflecting the smaller market and additional underwriting. The cost differential is often 0.5 to 1.0 percentage points.

Stamp Duty when buying

The 3 percent SDLT surcharge for additional dwellings applies to limited company purchases of residential property. Some specific corporate purchases above GBP 500,000 attract the 17 percent flat rate (the 'enveloped dwellings' regime) which is not typically relevant to standard buy-to-let.

Transferring from personal name

Moving an existing personal-name buy-to-let into a company triggers SDLT (on the deemed acquisition by the company at market value) and CGT (on the deemed disposal by the individual). Section 162 incorporation relief can defer CGT in limited circumstances where a business is genuinely transferred as a going concern, but the rules are strict.

Administrative costs

Companies have additional admin: annual accounts and confirmation statements at Companies House, corporation tax returns, separate bank accounts, and (where applicable) audit thresholds. Accountancy fees are typically GBP 800 to GBP 2,500 per year for a small property company.

Inheritance planning

Shares in a property company can be passed down using shareholdings, alphabet shares, and trusts, sometimes more flexibly than property held directly. Business Property Relief generally does not apply to property letting businesses, so IHT planning relies on lifetime gifting and trust structures rather than 100 percent BPR.

The post-Section 24 economics of buy-to-let

Section 24 of the Finance (No. 2) Act 2015 restricted the tax relief individual UK landlords can claim on residential mortgage interest. From April 2020 the restriction reached full effect: mortgage interest is no longer deducted from rental income, and is instead given as a 20 percent basic-rate tax credit against the income tax bill. The change pushed many higher-rate landlords into higher effective tax positions.

The 'phantom income' problem arises because gross rent (before mortgage interest) is now included in taxable income. This can push a landlord into a higher tax band, reduce their Personal Allowance (which tapers from GBP 100,000 to nil at GBP 125,140), and trigger the High Income Child Benefit Charge. The effective marginal rate on rental income for higher-rate landlords with substantial debt can exceed 60 percent in some scenarios.

Limited company landlords are not subject to Section 24. Companies deduct mortgage interest as a normal business expense before corporation tax. This has driven a substantial shift toward limited company structures for new UK buy-to-let purchases since 2017. The trade-off is double taxation on extracted profits (corporation tax then dividend tax) versus single income tax under personal ownership.

Stamp Duty surcharges and devolved variants

The Stamp Duty Land Tax surcharge for additional dwellings in England and Northern Ireland was introduced at 3 percentage points above standard rates from April 2016 and increased to 5 percentage points from 31 October 2024 under the Autumn Budget 2024. The surcharge applies where the purchaser owns another dwelling anywhere in the world at the end of the day of the purchase, subject to a GBP 40,000 de minimis on the existing interest.

Replacement of the main residence triggers a refund of the surcharge if the old main residence is sold within 36 months of buying the new main home. The refund is claimed through HMRC within 12 months of the sale or the original SDLT filing, whichever is later, and HMRC typically processes straightforward refunds within 15 working days.

Scotland operates the LBTT Additional Dwelling Supplement at 8 percent of the purchase price (raised from 6 percent on 5 December 2024) where the price exceeds GBP 40,000. Wales operates LTT higher rates starting at 5 percent for the first band up to GBP 180,000. Each devolved system has its own thresholds and rates, with replacement-of-main-residence refunds available on similar 36 month terms.

PRA underwriting and stress tests

The Prudential Regulation Authority (PRA), part of the Bank of England, issued Supervisory Statement SS13/16 in 2016 and tightened the rules in 2017. Lenders must apply Interest Coverage Ratio (ICR) tests and stress rates designed to ensure rental income can support the mortgage if interest rates rise. The standard ICR requirements are 125 percent for basic-rate taxpayers and 145 percent for higher and additional-rate taxpayers; many lenders apply 145 percent across the board.

The minimum stress rate is the higher of 5.5 percent or the contractual rate plus 2 percent. Some lenders apply lower stress rates on five-year fixed mortgages where the refinance risk during the fixed period is reduced. Portfolio landlords (four or more mortgaged buy-to-let properties) face additional whole-portfolio assessment under the PRA framework, with the lender reviewing all rental income, all property values, and overall cash flow.

Buy-to-let mortgages are typically interest-only, with the capital repaid through eventual sale or refinancing. LTVs cap at 75 percent at the mainstream segment, with some specialist lenders going to 80 percent. Rates typically run 1 to 2 percentage points above equivalent residential rates, reflecting the higher risk profile.

Licensing, EPCs, and the Renters' Rights Bill

Mandatory HMO licensing under the Housing Act 2004 applies to properties occupied by five or more people forming two or more households who share kitchen, bathroom, or toilet facilities. Additional HMO licensing schemes (covering smaller HMOs) and selective licensing schemes (covering all rentals in a designated area) can be designated by individual local authorities. Operating an unlicensed property where a licence is required is a criminal offence with unlimited fines on prosecution or civil penalties of up to GBP 30,000.

The Energy Performance Certificate minimum standard for rented properties is currently an E rating under the Minimum Energy Efficiency Standards (Private Rented Sector) Regulations 2015. Properties below E cannot be let unless an exemption is registered on the PRS Exemptions Register. Government proposals to raise the minimum standard to C have been the subject of successive consultations; the timetable is uncertain.

The Renters' Rights Bill, currently progressing through Parliament, abolishes Section 21 no-fault eviction, converts assured shorthold tenancies into rolling periodic tenancies, expands Section 8 grounds for possession (including for sale of the property and owner or family-member occupation), creates a Private Rented Sector Database (a landlord register), and creates a new Ombudsman. Commencement depends on royal assent and the Secretary of State's commencement orders.

Capital gains tax on sale

Capital gains on buy-to-let sales by individuals are taxed at 18 percent (basic-rate band) or 24 percent (higher and additional-rate bands) on residential property from 30 October 2024 onwards. The annual exempt amount is GBP 3,000 from the 2024 to 2025 tax year. Where the property was at some point the seller's main residence, Private Residence Relief can shelter the period of occupation plus the final 9 months of ownership.

The disposal must be reported to HMRC and any CGT paid within 60 days of completion using the UK Property Disposals service on gov.uk. The 60 day window is significantly shorter than the original 30 day rule introduced in April 2020 and the standard Self Assessment timetable. Joint owners report individually on their share of the gain.

Income tax on rental profit in detail

Rental profit is reported on the property pages of the Self Assessment return for individual landlords. Allowable deductible expenses include letting agent fees, insurance, repairs and maintenance (but not capital improvements), ground rent and service charges, professional fees, accountant fees, council tax and utilities where paid by the landlord, advertising costs, and travel costs related to managing the property. Mortgage interest is no longer deductible from rental income under Section 24 but produces a 20 percent basic-rate tax credit.

Replacement of Domestic Items relief allows the cost of replacing furnishings, white goods, and similar items in a let property to be deducted from rental income. The relief replaced the previous Wear and Tear Allowance from 6 April 2016. The replacement cost must be of a like-for-like item; the deduction is limited to the value of an equivalent replacement, not an upgrade.

Where a property is jointly owned by spouses, the rental income is treated as 50/50 by default. A Form 17 election can change the split to reflect actual beneficial ownership where the beneficial ownership is documented (typically through a deed of trust). The election is widely used to allocate more income to the lower-earning spouse and reduce overall tax liability.

Repairs versus capital expenditure distinction

The distinction between repairs (deductible against rental income) and capital improvements (added to base cost for CGT) is a frequent area of dispute with HMRC. A repair restores the property to its previous condition; an improvement enhances it beyond the original specification. Replacing a kitchen with a similar new kitchen is a repair; replacing a small kitchen with a much larger or higher-specification kitchen is a capital improvement.

The de minimis test is fact-sensitive. HMRC's Property Income Manual provides guidance on specific scenarios. Where significant work has been done, landlords typically need to apportion between repair and capital elements. Professional accountancy advice is useful for material refurbishments and renovations.

Devolved nation property rules

Scotland operates Land and Buildings Transaction Tax (LBTT) under the Land and Buildings Transaction Tax (Scotland) Act 2013 with the Additional Dwelling Supplement currently 8 percent of the purchase price where the price exceeds GBP 40,000. The Scottish housing market also has the distinct Private Residential Tenancy (PRT) regime under the Private Housing (Tenancies) (Scotland) Act 2016, which abolished no-fault evictions from December 2017.

Wales operates Land Transaction Tax (LTT) under the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017 with higher rates for additional dwellings starting at 5 percent. The Renting Homes (Wales) Act 2016, in force from 1 December 2022, replaced ASTs with 'occupation contracts'. Northern Ireland operates under the Stamp Duty Land Tax regime with the additional dwellings surcharge applied at 5 percentage points from 31 October 2024.

Where to get further help

MoneyHelper at moneyhelper.org.uk provides free impartial guidance on UK personal finance topics from the Money and Pensions Service. Citizens Advice at citizensadvice.org.uk provides free advice on benefits, debt, housing, and consumer issues. The FCA's consumer pages at fca.org.uk/consumers cover regulated financial products with consumer-focused explanations. For complaints about regulated firms, the Financial Ombudsman Service at financial-ombudsman.org.uk handles disputes with award limits of GBP 430,000 for cases referred from 1 April 2024.

For specialist topics, professional bodies maintain accreditation registers and consumer information. The Society of Trust and Estate Practitioners at step.org lists qualified estate planners; the Law Society at lawsociety.org.uk lists qualified solicitors; the Personal Finance Society and the Chartered Insurance Institute maintain registers of qualified financial advisers. For regulated financial advice, the FCA Register at register.fca.org.uk is the authoritative check on firm authorisation.

Disclaimer

This article provides general information on limited company buy-to-let and is not personal tax or legal advice. Incorporation decisions are complex; professional advice is essential.

Frequently asked questions

Is a limited company always better for buy-to-let?

No. The arithmetic depends on personal income tax band, the level of mortgage debt, the time horizon, and whether profits are extracted or retained.

Can the 3 percent SDLT surcharge be avoided?

The surcharge applies to limited company residential purchases regardless of whether the company already owns property.

Are mortgage interest rates higher in a company?

Typically yes, by 0.5 to 1.0 percentage points compared with personal-name buy-to-let.

Can a director live in the company-owned property?

Doing so triggers benefit-in-kind charges and reclassifies the use, with significant tax implications. It is generally avoided.

Does incorporation relief always apply on transfer?No. Section 162 incorporation relief is restrictive and typically requires the property letting to be operated as a true business with active management of multiple properties; HMRC scrutiny is high.

Frequently asked questions

Is a limited company always better for buy-to-let?

No. The arithmetic depends on personal income tax band, the level of mortgage debt, the time horizon, and whether profits are extracted or retained.

Can the 3 percent SDLT surcharge be avoided?

The surcharge applies to limited company residential purchases regardless of whether the company already owns property.

Are mortgage interest rates higher in a company?

Typically yes, by 0.5 to 1.0 percentage points compared with personal-name buy-to-let.

Can a director live in the company-owned property?

Doing so triggers benefit-in-kind charges and reclassifies the use, with significant tax implications.

Does incorporation relief always apply on transfer?

No. Section 162 incorporation relief is restrictive and typically requires active business operation; HMRC scrutiny is high.