Since April 2020, landlords can no longer deduct mortgage interest as an expense. Instead, tax relief is capped at 20%. This change affects UK and non-UK resident landlords, trustees, and partnerships but excludes companies. Learn how this impacts your tax bill.

In April 2017, new rules were introduced that limited the tax relief on mortgage costs for residential landlords to the basic rate of tax. This restriction on finance costs was phased in over several years and was fully implemented by 6 April 2020. As a result, all finance costs, including mortgage interest on rented properties, are no longer allowed as expenses. Any available tax relief is now capped at the basic tax rate of 20%.

Finance costs includes interest on mortgages, loans (including those for furnishings), overdrafts, alternative finance returns, mortgage fees, and other related costs, such as discounts, premiums, and disguised interest. However, no relief is granted for capital repayments of a mortgage or loan.

You will be affected by this restriction if you are:

The finance cost restriction does not apply if you are a:

These entities will continue to receive relief for interest and other finance costs in the usual manner.

Source:HM Revenue & Customs | 17-03-2025
author avatar
CIGMA Accounting
CIGMA Accounting Ltd is a forward-thinking accounting and tax firm based in London, dedicated to delivering high-quality compliance, tax planning, and business advisory services to entrepreneurs, landlords, and growing SMEs. With offices in Wimbledon and Farringdon, we combine local expertise with a tech-driven approach to simplify accounting. Our services include corporation tax filing, VAT compliance, HMRC investigation support, R&D tax credit claims, capital allowances optimisation, and bookkeeping automation. What sets CIGMA apart is our ability to blend traditional accounting rigour with AI-powered systems that reduce errors, save time, and provide real-time financial insights. Our team ensures that every client - from startups to high-net-worth individuals - receives a bespoke solution aligned with their growth goals. Whether you need strategic tax planning, help with HMRC disclosures, or a full outsourced finance function, CIGMA Accounting delivers clarity, compliance, and confidence.