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Rising CPI Inflation Could Impact Mortgage Rates

CPI inflation has risen to 3.1%, prompting concerns that mortgage rates could increase further.

By David Sampson
16 September 2026
2 min read
UK mortgage rates article image for Rising CPI Inflation Could Impact Mortgage Rates

TL;DR

  • CPI inflation has risen to 3.1%, prompting concerns that mortgage rates could increase further.
  • borrowers and investors should prepare for potential rate hikes.

Written by David Sampson for Mortgage118. Last updated 16 September 2026. Reviewed against our editorial standards. Editorial standards. Mortgage118 is a directory — not FCA-authorised and not a mortgage adviser.

The latest consumer price index (CPI) inflation figures indicate a rise in UK inflation, which may lead to higher mortgage rates. The Office for National Statistics (ONS) reported that CPI inflation for the 12 months ending in August reached 3.1%, up from 2.9% the previous month. This uptick in inflation is causing concern among mortgage experts, who warn that lenders may respond with increased rates as markets react to these developments.

How Will Rising Inflation Affect Mortgage Rates?

Mortgage experts believe that the recent rise in CPI inflation was largely anticipated by lenders. However, if inflation continues to exceed expectations, it could lead to a more significant reaction from the markets. David Hollingworth, an associate director at L&C, noted that while the August increase was expected, any further unexpected inflation could unsettle the markets and result in lenders adjusting their rates accordingly.

What Should Borrowers and Investors Watch For?

As inflation pressures persist, borrowers should keep a close eye on mortgage rates. Carl Parker, national director at Just Mortgages, highlighted that ongoing energy supply shocks are contributing to rising prices, which may further influence lenders’ decisions. Investors and landlords should also be aware that higher borrowing costs could impact property investment strategies and rental yields.

What This Means for Borrowers

For current and prospective borrowers, the rise in inflation signals a potential increase in mortgage rates. Those looking to secure a mortgage may want to act swiftly, as lenders could adjust their offerings in response to ongoing inflation trends. It’s advisable to monitor current mortgage rates and consider locking in a rate sooner rather than later to mitigate the impact of anticipated increases.

Frequently asked questions

Will mortgage rates definitely increase?

While the rise in CPI inflation suggests that mortgage rates may increase, it ultimately depends on how lenders respond to ongoing economic conditions.

How can I prepare for potential rate hikes?

Borrowers should monitor current mortgage rates closely and consider securing a mortgage sooner to avoid higher costs in the future.

About David Sampson

David Sampson writes about the UK mortgage market for Mortgage118, covering specialist lending, market trends, and practical advice for borrowers. All content is reviewed for accuracy against FCA guidelines and current market data.