Introducing RentalBux: Our MTD Software for Landlords
Generic software doesn't understand property businesses and require manual intervention to meet deadlines. That's why we developed RentalBux!
If you’re a leaseholder planning a lease extension, and want to understand the potential tax implications, including exposure to Capital Gains Tax, Stamp Duty Land Tax, or corporation tax, you are in the right place.
At UK Property Accountants, we assess your tax liabilities, identify available reliefs, and provide tailored advice so you can make informed, tax-efficient decisions with confidence.
What our clients say about us
Rendering the best service with a team of qualified and regulated accountants and tax advisers.
Beyond the Lease
Here's why leaseholders and property companies trust us to manage their lease extension tax planning and minimise their exposure.
Expert Tax Advisors
Our property tax specialists bring deep experience in the complex tax implications of lease extensions for Directors/Shareholders and Companies.
End-to-End Service
From assessing your SDLT position to preparing tax computations and liaising with your solicitors, we manage every step of the lease extension process.
Tailored Support
We adapt our advice to your structure, whether you’re a leaseholder, company, or developer and managing leasehold property.
Tax Implications of Lease Extension
When a company grants a long lease, say a 999-year interest over a property to its shareholder or director, it creates a chain of tax consequences. The impact differs depending on whether the transaction is viewed from the company’s or the individual’s perspective.
If the lease is granted for less than market value, the company is treated as disposing of part of its interest at market value under section 17 of the TCGA 1992.
Under FA 2003 Schedule 4 and 4A, connected-party transactions are assessed on market value, not just the actual consideration.
However, where consideration is non-monetary or understated, the market value rule ensures a fair charge.
The treatment depends on why the lease was granted:
The company, in either case, receives no corporation tax deduction for the value transferred.
When the individual (shareholder or director) later sells or transfers the leasehold interest, they may be liable to Capital Gains Tax on any profit made from the disposal.
Lease Longer, Tax Smarter
We provide comprehensive tax support tailored to every stage of your leasehold extension agreement, from initial clarity to full evidence-backed planning.
Our written assessment provides detailed calculations, checks relief eligibility, and highlights your optimal tax strategy. This is ideal for clients seeking measurable insight into liabilities before committing to the extension.
Designed for high-value or connected-party cases, this report delivers a full tax analysis, including bespoke structuring recommendations, valuation alignment, and HMRC compliance references. It forms the foundation for making tax-efficient, evidence-based decisions.
Client Scenarios
Every lease extension carries its own tax implications, from SDLT and Capital Gains Tax to Section 455 and dividend rules for companies. At UK Property Accountants, we tailor our advice to your ownership structure, ensuring your lease extension is compliant, efficient, and tax optimised.

Extending a flat lease?
We help you understand SDLT and CGT, including eligibility for ESC D39 or Private Residence Relief, so your extension preserves home value.

Short leases reducing property value?
We evaluate tax cost versus value benefit and optimise timing and structure for efficiency.

Inherited flats with short leases?
We review CGT from inheritance and maximise available reliefs to enhance value without unnecessary tax exposure.

Development-related leases?
We handle SDLT, CGT, and connected-party valuation complexities to align your extensions with both commercial and tax objectives.

Extending multiple rental properties?
We optimise SDLT and CGT, ensuring your portfolio remains financially efficient.

Extending UK property from abroad?
We guide you through non-resident CGT, SDLT reporting, and double-taxation planning for full compliance.

Buying your building’s freehold?
We coordinate tax implications, apportion premiums, and simplify SDLT and CGT complexities for all participants.

Companies extending leases for shareholders or directors?
We handle connected-party rules, Corporation Tax, Section 455 charges, and dividends to ensure compliant, tax-efficient transactions.

Properties with both residential and commercial leases?
We apportion SDLT and CGT accurately, ensuring full compliance and optimised outcomes.
Our Process
Our work is centred around efficiency, collaboration, and delivering exceptional results to our clients.
We start with a straightforward process. Answer a few simple questions to help us understand your circumstances. It’s hassle-free, quick and designed to save you time.
Once we have the details, our team of experienced accountants gets to work. You can trust us to manage the complexities and ensure everything is accurate and compliant.
We conduct a meticulous review to ensure accuracy, compliance, and completeness in every submission. Our streamlined process guarantees timely submissions, so you never miss a deadline.
Our commitment extends beyond accounting and tax advisory work. We provide ongoing support, including tax planning and addressing accounting queries throughout the year.
Related Services
We are committed to helping you achieve financial prosperity while optimising your tax position in the most effective and efficient way possible.
Our Accounting & Tax Recipes
Dive into our latest news & articles on property, finance & tax-related content.
Our Articles Covering Lease Extension
Our Latest News on Lease Extension
General queries by our clients related to Non Resident Landlord Return are answered here.
Extending a lease can trigger several UK property taxes depending on your circumstances. Stamp Duty Land Tax applies to premiums over £40,000, though exemptions may exist for surrender and regrant transactions. Capital Gains Tax can arise on the disposal element, but HMRC’s ESC D39 concession may remove the charge if conditions are met. Private Residence Relief can also provide a full exemption for main homes. We assess each case individually to minimise your tax exposure while completing your lease extension efficiently.
ESC D39 allows qualifying lease extensions to be ignored for Capital Gains Tax purposes, preventing what would otherwise be a disposal and reacquisition. To qualify, the transaction must be on commercial terms, not part of a wider arrangement, involve no capital sum to you, and cover substantially the same property with similar terms except for rent and duration. We evaluate your lease terms and structure the deal to make full use of ESC D39 where possible.
The SDLT on a lease extension depends on the premium paid and how the transaction is structured. Premiums below £40,000 are generally exempt. For surrender and regrant arrangements with no additional premium, relief may be available under Schedule 17A. Where SDLT applies, the rates follow standard residential or non-residential scales based on the property type. Our specialists ensure your extension is structured to achieve both commercial objectives and SDLT efficiency.
When a company extends a lease to related parties, like shareholders or directors, special tax rules apply. The company must calculate any gains based on market value, even if they charge no premium. This can trigger corporation tax. If the lease is given at a lower price than the market value, it could lead to either Section 455 tax (33.75%) or dividend treatment. We help you plan and shape these corporate deals to ensure compliance and reduce tax liabilities.
PRR can provide a full Capital Gains Tax exemption on extensions involving your main residence, even if ESC D39 doesn’t apply. PRR generally covers the property you live in, with extra relief for the final nine months of ownership. The exemption applies to the disposal element of a lease extension and can eliminate CGT liability entirely. We assess your eligibility and timing to help you maximise available relief.
Generic software doesn't understand property businesses and require manual intervention to meet deadlines. That's why we developed RentalBux!