For the first time since December, the typical two-year fixed mortgage deal now carries an interest rate of greater than 6%.
Mortgage lenders have been rapidly pulling and raising prices on deals in recent weeks, which has worried those looking for new deals.
Following the mini-budget last autumn, mortgage interest rates skyrocketed before slackening a little.
Borrowing rates have now increased once more as a result of concerns over the effects of rising prices.
The financial information service Moneyfacts reported that the average rate for a two-year fixed-rate mortgage was 6.01 on Monday.
The rate fell below 6 percent at the beginning of December before dropping even further, but it has recently climbed sharply once more. The peak seen after mini-budget was 6.65 percent in October of last year.
Recent information on wages and price increases has led markets to expect higher inflation and interest rates in the UK for longer than previously thought, which has been reflected in the funding cost of mortgages.
The rates that lenders charge both new borrowers and those who are remortgaging reflect this. Lenders have been pulling deals and raising rates on short notice, and some have been forced to do so because of excessive demand.
In the months of July through September, more than 400,000 people will have their current fixed deals expire. Many people will likely need to set aside funds for monthly repayments that are hundreds of pounds more expensive than they are used to.
The Bank of England's Monetary Policy Committee sets the base rate, which is currently at 4.5 percent. The base rate will be reviewed the following week, and it is widely anticipated that it will rise for the 13th consecutive time. The day before, the most recent official data on the rate of price growth will be released.
