The UK mortgage market has moved into a very different phase from the ultra-low-rate years many landlords became used to. While interest rates have eased from their recent peak, borrowing remains significantly more expensive than it was before the inflation shock, and that is continuing to reshape the buy-to-let market.
For landlords, the issue is not simply whether mortgage rates are slightly higher or lower from one month to the next. The bigger challenge is that many fixed-rate buy-to-let deals taken out during a much cheaper lending environment are now coming to an end. As those landlords come to remortgage, they are often discovering that the numbers have changed dramatically.
The end of cheap buy-to-let borrowing
For many years, landlords were able to rely on relatively low finance costs. That helped support investment, portfolio growth and, in many cases, manageable rental pricing. The market has now shifted.
Even where rates have reduced from their highest levels, they remain high enough to make a major difference to monthly repayments. A landlord moving from a low fixed rate onto a new product may face a substantial increase in costs, particularly if the loan is interest-only and the mortgage balance has not reduced.
This matters because buy-to-let property is not just a long-term capital investment. It is also a monthly cashflow business. If the rent no longer comfortably covers the mortgage, maintenance, insurance, compliance costs, letting costs, tax and periods of vacancy, the landlord has to make difficult decisions.
Why remortgaging is more difficult for some landlords
Remortgaging is not just about finding the lowest headline rate. Lenders also apply affordability and rental stress tests. In simple terms, the rent usually has to cover the mortgage payment by a sufficient margin when tested at a notional interest rate.
That can create problems for landlords whose properties were viable under older borrowing conditions but look tighter under today’s lending criteria. Some may find that they cannot borrow as much as before. Others may need to inject capital, accept a different product, move to a higher rate, or consider restructuring their portfolio.
This is particularly relevant for landlords with higher loan-to-value borrowing, properties in lower-yield areas, or homes where rent increases have not kept pace with mortgage costs.
The buy-to-let market is still active, but more cautious
The buy-to-let sector has not disappeared. Landlords are still refinancing, lenders are still lending, and there remains strong underlying demand for rented accommodation. However, the market has become more selective.
Professional and portfolio landlords are often better placed because they may have more experience, stronger equity positions and a clearer understanding of how lenders assess risk. Smaller landlords, especially those with one or two properties, may feel the pressure more sharply if a single mortgage increase removes most of their profit.
This is one reason why landlords are reviewing their position earlier than they might have done in the past. Waiting until a fixed rate is about to expire can reduce options. A landlord who starts planning several months ahead may have more time to compare products, understand affordability, review rents, check ownership structure and decide whether to hold, refinance, reduce debt or sell.
Tax and regulation are adding to the pressure
Mortgage costs are only one part of the current challenge. Landlords have also faced a series of tax and regulatory changes that have made the sector less attractive than it once was.
The restriction of mortgage interest relief for personally owned buy-to-let property remains a major issue. Unlike many ordinary businesses, individual landlords cannot simply deduct all finance costs from rental income before calculating tax. This means some landlords can face tax bills even where their real cash profit is modest.
At the same time, landlords are dealing with higher maintenance costs, insurance costs, licensing requirements in some areas, energy efficiency expectations and continuing uncertainty around rental reform. The result is a market in which many landlords are still committed, but fewer are expanding without careful calculation.
How this affects tenants
The mortgage market may sound like a landlord issue, but it has a direct impact on tenants.
When landlords’ costs rise, rents often come under upward pressure. Not every cost can be passed on, and tenants also have affordability limits, but sustained increases in borrowing and operating costs make it harder for landlords to keep rents stable.
Where landlords decide the figures no longer work, some will sell. If enough landlords leave the sector, rental supply tightens. That can mean fewer homes available to rent, more competition between tenants and higher rents for the properties that remain.
This is the central problem facing the rental market. Policies and market conditions that reduce landlord confidence may be politically popular in the short term, but they can also reduce supply. Tenants ultimately need more homes available, not fewer.
What landlords should be doing now
Landlords approaching the end of a fixed-rate deal should not leave the decision until the last minute. The market can move quickly, and different lenders may take very different views of the same case.
Important steps include reviewing the current mortgage expiry date, checking whether early repayment charges apply, assessing the current rental income, considering the property’s current value, and understanding how the figures look under today’s rates.
Landlords should also review whether their property is still producing an acceptable return after finance, tax, insurance, maintenance and void periods. In some cases, the answer may be to remortgage. In others, it may be to reduce borrowing, review rent, restructure ownership, or take broader advice on the future of the investment.
A more disciplined market
The current mortgage environment is forcing landlords to be more disciplined. The days when cheap finance could cover weak yields are largely over. Buy-to-let still has a role to play, but it increasingly favours landlords who understand their numbers, plan ahead and treat property as a serious long-term business.
For landlords who are well prepared, there are still opportunities. Rental demand remains strong in many areas, yields have improved in some regions, and lenders continue to support suitable buy-to-let cases. But the margin for error is smaller than it used to be.
The key message is simple: landlords should not assume that their next remortgage will look like their last one. The market has changed, and mortgage planning now needs to be an active part of managing any rental property.
For mortgage enquiries, contact NetRent:
Telephone: 01352 721300
Email: support@netrent.co.uk
Mortgage enquiries: mortgages@netrent.co.uk
Disclaimer: NetRent does not provide legal advice. This article represents our understanding of rental property law and the current buy-to-let mortgage market at the time of writing. Landlords should seek appropriate professional advice before making financial, tax, legal or mortgage decisions.