Four notable lenders have announced mortgage rate increases effective 9 September, with Halifax Intermediaries, BM Solutions, Accord Mortgages and InterBay all raising fixed rates by up to 0.12 per cent. For UK property investors, this tightening adds to the growing cost pressures already felt across the buy-to-let sector.
Halifax Intermediaries’ move to increase rates on home move and first-time buyer products signals a cautious approach to risk amid ongoing economic uncertainty. BM Solutions and Accord Mortgages, both focused on buy-to-let and residential portfolios, are responding similarly, reflecting the broader squeeze on mortgage affordability. InterBay’s hike, while smaller in scale, adds to the incremental rises that have been accumulating over the past year.
Data from Prop AI Deals shows that average fixed mortgage rates for buy-to-let properties have climbed by around 0.3 per cent since the start of 2026. This latest round of increases could push monthly repayments higher by several hundred pounds on typical investment loans. Investors with variable rate products or those looking to remortgage soon will face tighter margins and potentially reduced cash flow.
The ongoing rate rises coincide with rising inflation and cautious Bank of England guidance. For investors, this environment demands a sharper focus on property selection, rental yield sustainability and interest coverage ratios. Those relying on short-term refinancing may need to factor in higher costs or consider longer fixed terms to lock in current rates.
In summary, these incremental rate hikes from Halifax, BM Solutions, Accord and InterBay underline the continued pressure on mortgage pricing. UK property investors should review their financing strategies and stress-test their portfolios against further cost increases. Staying ahead of lender pricing moves will be key to maintaining profitability in a market where borrowing costs are steadily climbing.
Source: Mortgage Strategy
