The average interest rate on a new five-year fixed mortgage deal has hit 6% for the first time in three years, figures show.

The cost of home loans has been rising in recent weeks, as lenders face higher costs amid international concern over rising prices, interest rates, and government borrowing costs.

It means home buyers and anyone renewing a fixed deal have seen about 1,500 mortgage deals priced below 5% vanish since the start of September, according to the financial information service Moneyfacts.

It described the situation as "brutal" for borrowers, with the average rate on five-year deals now at 6%, and at 5.98% on two-year fixed mortgages.

For borrowers, the interest rate on a fixed mortgage does not change until it expires, usually after two or five years, and a new one is chosen to replace it. The vast majority of homeowners and buyers have this kind of mortgage.

Since the Iran war began, global economic uncertainty has been pushing up the cost of deals.

Moneyfacts said that the biggest High Street lenders had made repeated fixed rate increases during September. Barclays increased selected fixed rates on four occasions, while HSBC, Lloyds Bank, Nationwide, NatWest, Santander and TSB each made three rounds of increases.

It meant that the average rate on a new five-year deal was at its highest since September 2023. On two-year deals, the average rate is at its highest since December 2023.

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Interest rates fluctuate based on the Bank of England's base rate and market conditions

"Average fixed mortgage rates rising back to three-year highs will be disastrous news for borrowers," said Rachel Springall, finance expert at Moneyfacts.

"Borrowers who were hoping mortgage rates would stabilise will be disappointed."

She said that those coming to the end of a fixed deal would be "wise to seek advice and compare deals carefully".

Some lenders could allow people to lock in a rate three months before their current deal ends, while others could allow six months, she said.