Major mortgage lenders have increased rates for the second time this month. NatWest, Santander, HSBC, Lloyds Bank, and TSB are among those that have repriced products again since the start of September. Nationwide and other building societies have also begun a second round of increases.
The average two-year fixed mortgage rate stood at 5.73% on 15 September 2026, an increase of 0.89 percentage points from 4.84% at the beginning of March 2026. For a £250,000 mortgage over 25 years, this increase adds approximately £131 to monthly repayments, totalling an additional £1,572 a year.
Five-year fixed rates have also risen, with the average rate increasing from 4.96% in March to 5.78%. The Moneyfacts Average New Mortgage Rate has reached 5.68%, up from 4.90% at the start of March and 5.59% in August.
Rachel Springall, a finance expert at Moneyfacts, noted that a second wave of mortgage rate hikes has begun from major banks due to concerns over inflationary pressures. She added that it is highly likely other lenders will follow suit, and any returning deals could be priced higher.
The volatility is encouraging borrowers to arrange their next mortgage early. FCA figures show 381,364 mortgages secured a new deal up to six months before maturity during the second quarter of 2026. Around 750,000 households have fixed-rate mortgages expiring in 2026, many currently paying rates below 3%.