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Property118 Wins Tribunal Appeal Impacting the Mortgage Market

Property118 s tribunal win against HMRC could reshape landlord incorporation strategies in the UK mortgage market.

By David Sampson
7 August 2026
3 min read
UK buy to let mortgage article image for Property118 Wins Tribunal Appeal Impacting the Mortgage Market

TL;DR

  • Property118 s tribunal victory challenges HMRC s scrutiny over landlord incorporation strategies.
  • this ruling may affect how landlords structure their property investments moving forward.

Written by David Sampson for Mortgage118. Last updated 7 August 2026. Reviewed against our editorial standards. Editorial standards. Mortgage118 is a directory — not FCA-authorised and not a mortgage adviser.

Property118 has successfully appealed against HMRC’s incorporation notices aimed at landlords, a ruling that could significantly influence how property portfolios are managed in the UK mortgage market. This decision is particularly relevant for professional landlords contemplating the transfer of their personally held properties into corporate structures.

What was the case about?

The litigation revolved around the Substantial Incorporation Structure (SIS), which was promoted to professional landlords seeking to shift their property portfolios into corporate entities. HMRC raised concerns that these arrangements were primarily designed to circumvent Section 24, which limits the deductibility of finance costs for individual landlords. Mark Alexander, the founder of Property118, argued that tax benefits were not the main motivation behind the incorporation strategy.

Who is affected by this ruling?

This ruling impacts professional landlords who may consider incorporating their property holdings to benefit from potential tax efficiencies. It also has implications for brokers and financial advisors who guide clients in structuring their investments. Howard Reuben, a broker and founder of HD Consultants, noted that while this is a significant win for Property118, the actual tax strategies implemented by Cotswolds Barristers were not directly endorsed by the tribunal, leaving some uncertainty in the market.

What this means for landlords and the mortgage market

For landlords, this tribunal decision may encourage more to explore incorporation as a viable strategy for managing their property portfolios. However, the ongoing scrutiny from HMRC means that landlords should remain cautious and well-informed about the implications of such moves. Many lenders have indicated that their lending criteria will not change immediately, so landlords should stay alert for any shifts in lender policies that may arise from this ruling.

What are the next steps for Property118 and HMRC?

While Property118 has achieved a significant legal victory, the possibility of HMRC appealing the decision looms. Landlords and brokers should monitor developments closely, as the outcome of any potential appeal could reshape the market for property incorporation strategies. Additionally, stakeholders should keep an eye on how lenders adjust their policies in response to this ruling.

Frequently asked questions

What is the Substantial Incorporation Structure (SIS)?

The SIS is a strategy marketed to professional landlords for transferring personally held property portfolios into corporate structures, potentially offering tax benefits.

How might this ruling affect mortgage lending decisions?

While the ruling is a win for Property118, many lenders have stated that their lending decisions remain unchanged, indicating a cautious approach to incorporation strategies.

About David Sampson

David Sampson writes about the UK mortgage market for Mortgage118, covering specialist lending, market trends, and practical advice for borrowers. All content is reviewed for accuracy against FCA guidelines and current market data.