Limited company buy-to-let (BTL) mortgage options for 2- and 5-year fixed terms have risen sharply, with 1,730 deals on the market in October 2025 compared to 841 in October 2023, according to research from Moneyfactscompare.co.uk.
The typical 2-year fixed rate for limited company BTL mortgages was 5.04% in October 2025, down from 6.53% two years earlier.
The 5-year fixed average stood at 5.50%, down from 6.69% in October 2023.
Rachel Springall, finance expert at Moneyfactscompare.co.uk, said: “Landlords weighing up their options to reduce costs may be pleased to see the choice of limited company buy-to-let deals has grown.
“There are now 1,730 fixed rate deals with a term of two- to five-years on the market, up from just 841 back in October 2023.
“The growth should be welcomed in a market that is consistently facing external pressures, but the rumour mill churn in the run-up to the Budget could be causing concern.”
Springall added: “One of the most worrying rumours circulating over recent weeks is the idea to levy National Insurance Contributions (NICs) on pre-mortgage profits.
“Unlike other reforms that gradually hit landlords, this could become a significant move to lead more landlords into setting up a limited company for their buy-to-let property portfolio.
“This has been a growing trend over recent years due to reductions in mortgage interest tax relief, which was gradually phased out between 2017 and April 2020.
“Due to this, new landlords might never have had this relief, but that does not mean they are not facing their own challenges to turn a profit on their investment.”
She said: “It is essential landlords seek independent advice to ensure they are as prepared as possible for any fundamental changes that may be announced in the coming months.
“The ongoing review of the Renters’ Rights Bill touches on both no-fault evictions and requirements surrounding lettings heat and safety requirements, which will need digesting carefully.
“However, the buy-to-let market is still booming, and a recent study from Fleet revealed portfolio landlords are prominent, with around 61% of applications coming from those who hold four or more properties.”
She added: “It may then not be too surprising to see a dominance in limited company applications, recorded as 81% throughout the third quarter of 2025.
“Landlords may find it encouraging to see the cost of using a limited company buy-to-let has fallen over the past two years, thanks to falls to the Bank of England Base Rate and lower swap rates.
“The average two-year fixed rate is now 5.04% for a buy-to-let mortgage available to limited companies, down from 6.53% in October 2023.
“Year-on-year, the two-year rate is down from 5.54%. The future expectation for rate cuts remains uncertain, but it is hoped that lower borrowing costs could still encourage investors.”
She said: “Those who do already have a portfolio and do not feel the return on their investment will be sustainable must ensure they understand the costs involved in exiting the market, such as agent fees and Capital Gains Tax (CGT).
“The past few years have been challenging for landlords due to inflationary pressures, but that does not necessarily mean that these rising costs have been directly passed onto tenants.
“Rental growth has now lagged behind inflation (CPI) for nine consecutive months, according to Hamptons.”
She added: “Wider economic pressures continue to impact the rental market, so there is a careful balancing act for landlords to both meet their desired profit margin, while also ensuring they charge their tenants fairly.
“Ultimately, keeping valuable tenants and keeping properties occupied will be essential in the months ahead.”
