Why September’s Mortgage Market Is Watching Inflation More Than Bank Rate

At its meeting ending 29 July, the Bank of England’s Monetary Policy Committee voted by six to three to keep Bank Rate at 3.75%. Significantly, the three dissenting members wanted to raise it to 4%, rather than cut it. The next decision is due on 17 September.

That division matters because the inflation picture has become less straightforward.

The Consumer Prices Index rose by 2.9% in the 12 months to July 2026, up from 2.6% in June. CPIH, the broader measure that includes owner-occupiers’ housing costs, rose by 3.1%. Housing and household services made the largest upward contribution to the change, with higher energy costs playing an important role. For households hoping that easing inflation would produce steadily cheaper borrowing, this is a reminder that the path is unlikely to be linear.

Bank Rate influences borrowing costs, but fixed-rate mortgages are also shaped by financial markets’ expectations of where interest rates are heading. Lenders commonly use wholesale market rates as part of their pricing calculations. If investors begin expecting interest rates to remain higher for longer, those market rates can rise even while Bank Rate itself is unchanged.

The Bank of England reported in July that quoted two-year fixed mortgage rates at 75% loan-to-value had risen substantially since late February as market interest rates changed. That difference between the current Bank Rate and the rates available to borrowers is visible in September’s mortgage market. Moneyfacts reported on 2 September that average two- and five-year fixed mortgage rates were 5.59% and 5.63% respectively. The lowest advertised rates were considerably cheaper, particularly at lower loan-to-value ratios, illustrating how much deposit size, equity and individual circumstances still matter.

An advertised market average, therefore, should never be treated as the rate an individual borrower will necessarily receive.

The practical lesson is to budget using a mortgage that is genuinely available to you rather than a prediction about where Bank Rate might go. For a buyer close to the limits of affordability, relatively small movements in mortgage pricing can alter maximum borrowing, monthly costs and consequently the range of properties worth considering. Existing owners approaching the end of a fixed deal face a similar calculation. The Bank of England estimated in July that nearly 750,000 households paying mortgage rates below 3% were due to roll off those fixes during 2026, with an average projected payment increase of £170 a month for that particular group. That is a useful reminder to start examining refinancing options before a current deal expires rather than relying on a future rate reduction.

Changes in borrowing costs affect areas differently. A market dominated by highly leveraged purchasers may respond differently from one with more cash buyers or substantial homeowner equity. The September Bank of England decision will therefore provide important context, but it will not determine the value or saleability of every property. For anyone planning a move, national financial conditions need to be considered alongside actual demand, supply and affordability in the relevant local market. A credible local professional can help establish how that wider environment is translating into buyer behaviour on the ground.

September may produce another important interest-rate signal, but borrowers should resist building property decisions around a single Monetary Policy Committee meeting. Mortgage pricing reflects expectations as well as today's Bank Rate. Understanding the difference allows buyers, sellers and remortgagers to make decisions using costs they can see rather than cuts they hope will arrive.