What Is Section 24? A Guide for Landlords (2026)

What Is Section 24? A Guide for Landlords (2026) hero
Section 24 has significantly changed the tax landscape for UK landlords, affecting profitability and investment strategies. In this guide, we'll explore how these changes impact landlords in 2024, provide insights on navigating the new tax rules, and discuss alternative strategies to help you manage your property investments effectively. Whether you're new to property investment or looking to adapt to these changes, this article will give you the knowledge you need.

What Is Section 24?

Section 24 of the Finance Act 2015 brought important changes to the taxation of UK landlords' rental income, particularly regarding how mortgage interest tax relief is calculated. While this adjustment has reduced some of the previous financial benefits, it encourages landlords to take a more strategic approach to their property investments. By reassessing their portfolios and considering new financial strategies, many landlords are finding ways to adapt and continue to grow their property ventures, even in this evolving tax environment.

When Was Section 24 Introduced?

Section 24 was introduced as part of the UK government's efforts to reform the taxation of landlords. The legislation was first announced in the Summer Budget of July 2015 by then-Chancellor George Osborne. This announcement marked a significant shift in the government's approach to taxing rental income, with the intention of levelling the playing field between homeowners and buy-to-let investors.

The Phased Implementation

The changes brought about by Section 24 were not immediate. Instead, the government opted for a phased implementation to allow landlords time to adjust to the new tax rules. The changes were gradually introduced over four years, starting from the 2017/18 tax year and culminating in the full impact being felt from the 2020/21 tax year onwards.

  • 2017/18 Tax Year: 25% of mortgage interest payments were subject to the new tax rules, with the remaining 75% still deductible under the old system.
  • 2018/19 Tax Year: 50% of mortgage interest payments were treated under the new system.
  • 2019/20 Tax Year: The proportion increased to 75%.
  • 2020/21 Tax Year and Beyond: 100% of mortgage interest payments were fully subject to the new tax rules.

The Rationale Behind Section 24

The introduction of Section 24 was primarily driven by the government’s desire to curb the rapid growth of the buy-to-let market, which was believed to be inflating property prices and making it more difficult for first-time buyers to enter the market. By reducing the tax advantages previously enjoyed by landlords, the government aimed to discourage speculative property investments and promote homeownership among the general public.

How Section 24 Affects Landlords

The legislation caps mortgage interest relief at a 20% tax credit, replacing the previous system where landlords could deduct mortgage interest at their full tax rate. This shift has led to several key impacts:

Key Impacts on Landlords

  • Increased Tax Bills: Higher-rate taxpayers who previously claimed 40% or 45% tax relief now only receive 20%, resulting in much higher tax liabilities.
  • Profitability Challenges: Landlords with significant mortgage debt face reduced profit margins, with some experiencing negative cash flow.
  • Rent Increases: To offset the increased tax burden, many landlords have raised rents, which has contributed to higher rental costs across the UK.
  • Strategic Shifts: In response to these changes, some landlords are transferring properties into limited companies or shifting investments to holiday lets and commercial properties, where different tax rules apply.

Common Confusions About Section 24

A major source of confusion with Section 24 is the cap on mortgage interest relief at 20%, regardless of a landlord's tax band. Previously, higher-rate taxpayers could claim relief at their full tax rate, making this a significant change.

Additionally, Section 24 specifically targets mortgage interest relief for landlords, which is sometimes confused with other tax laws. It's crucial for landlords to understand this focus to accurately assess the impact on their finances.

Response from Landlords

Section 24 has provoked strong reactions from UK landlords, many of whom feel unfairly targeted by the legislation. The changes have reduced profitability, leading some landlords to sell properties or raise rents to cover the increased tax burden.

Landlord Opposition

Landlord associations, such as the National Residential Landlords Association (NRLA), have actively campaigned against Section 24, arguing that it discourages investment and worsens the housing shortage. Despite legal challenges, the legislation remains in place.

Impact on Tenants and Market Adjustments

To cope with higher tax bills, many landlords have increased rents, adding pressure to an already strained rental market. Others have restructured their investments, moving properties into limited companies or shifting towards holiday lets and commercial properties to bypass the Section 24 restrictions.

How Landlord Tax Worked Under the Old System

Before the implementation of Section 24, UK landlords enjoyed a tax environment that allowed them to fully deduct mortgage interest payments from their rental income. This meant that if a landlord earned £20,000 in rent and paid £10,000 in mortgage interest, only the remaining £10,000 would be subject to tax, significantly reducing their overall tax liability.

For higher-rate taxpayers, this system was especially beneficial. They could deduct the mortgage interest at their full marginal rate of 40% or 45%, which made property investments much more profitable. This tax relief played a crucial role in encouraging investment in buy-to-let properties, as landlords could confidently leverage borrowed funds, knowing that interest payments would substantially reduce their taxable income.

How It Works Now Under Section 24

Under Section 24, landlords can no longer deduct mortgage interest directly from their rental income. Instead, they receive a 20% tax credit on their interest payments, regardless of their tax bracket.

For instance, if a landlord pays £10,000 in mortgage interest:

  • They receive a £2,000 tax credit (20% of £10,000).
  • They can no longer deduct the full £10,000 from their taxable income.

This shift results in higher tax bills, particularly for those in higher tax bands, and reduced cash flow for landlords with significant mortgage debts.

Consequently, many landlords have adjusted their strategies, such as forming limited companies or diversifying into different property investments, to lessen the financial impact of Section 24. Understanding these changes is essential for effective financial planning and management.

Alternative Routes for Landlords

In response to Section 24, many landlords have explored alternative strategies to maintain profitability and manage tax liabilities.

Partner Routes

Some landlords transfer property ownership or split rental income with a spouse or family member in a lower tax bracket, reducing the overall tax burden. This strategy requires careful planning to ensure compliance with tax laws.

Limited Companies

Transferring properties into a limited company is another popular option. Limited companies can still deduct mortgage interest as a business expense, avoiding Section 24's restrictions. However, this approach involves additional costs and complexities, including different tax rates and regulations.

Holiday Lets

Converting properties into holiday lets or short-term rentals is another strategy. These properties are often subject to more favourable tax rules and can generate higher rental income, though they also come with increased management demands and seasonal income variations.

2024 Budget Updates

Staying informed about the 2024 budget is crucial, as new government policies could introduce opportunities or challenges for landlords. Keeping up with these developments helps landlords make informed decisions about their investments.

Wider Impact on the Rental Market

Section 24 has significantly reshaped the UK rental market, impacting landlords, tenants, and the broader housing landscape. The legislation has led to several notable outcomes:

  1. Rising Rents: Landlords, facing higher taxes and reduced profits, have increased rents to cover these costs, driving up living expenses for tenants across the UK.
  2. Reduced Rental Supply: The financial strain has led some landlords to sell properties or downsize their portfolios, decreasing the availability of rental properties and worsening the housing shortage.
  3. Shifts in Investment Strategies: Many landlords are shifting away from traditional buy-to-let investments, opting for holiday lets, commercial properties, or limited company ownership to mitigate the effects of Section 24.
  4. Impact on Housing Affordability: Higher rents combined with a reduced rental supply have made housing less affordable, particularly in high-demand urban areas, increasing financial pressure on tenants.

Conclusion

Section 24 has significantly changed the UK rental market, increasing tax burdens and reducing profitability for landlords. This has led many to rethink their strategies, whether by restructuring portfolios or exploring new investment routes.

For landlords, adapting to these changes is crucial for maintaining profitability. For tenants, the result has been rising rents and a tighter rental market, making it essential to stay informed.

As the market evolves, understanding the effects of Section 24 will be key for both landlords and tenants in making informed decisions moving forward.

FAQs

How does Section 24 affect first-time landlords?

First-time landlords face unique challenges under Section 24, as they don't have the benefit of previous tax reliefs. It's crucial to account for the 20% cap on mortgage interest relief when calculating returns, as it can significantly impact cash flow and profitability.

Can I still deduct other property expenses under Section 24?

Yes, while Section 24 limits mortgage interest relief, you can still deduct other expenses like maintenance, repairs, and letting agent fees from your rental income. These deductions help reduce taxable income but don’t offset the increased tax burden on mortgage interest.

Is it worth becoming a landlord in 2024 with Section 24 in place?

Becoming a landlord in 2024 can still be profitable, but it’s more challenging due to Section 24. Prospective landlords need to carefully assess financial viability and consider strategies like forming a limited company to mitigate tax impacts.

How can landlords manage cash flow under Section 24?

Effective cash flow management under Section 24 involves strategies like increasing rent, cutting costs, and refinancing mortgages to lower interest rates. Budgeting for tax payments throughout the year is also crucial to avoid cash flow issues.

Does Section 24 apply to overseas landlords?

Yes, Section 24 applies to all UK rental properties, including those owned by overseas landlords. It’s essential for overseas landlords to comply with these rules and consider seeking professional tax advice to manage the impact effectively.
 

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