The average rate on a 30-year fixed mortgage climbed to 6.66% on Thursday, reaching its highest level in a year. The latest reading, reported by the Federal Home Loan Mortgage Corp., shows borrowing costs moving higher again for homebuyers.

According to the report, the increase is being driven by concerns tied to war and persistent inflation. Those pressures have added to market uncertainty and pushed mortgage rates upward after a period of volatility.

Higher mortgage rates can make monthly payments more expensive, adding strain for buyers already dealing with elevated housing costs. The rise also makes financing conditions tougher for anyone trying to enter the market while rates remain near recent highs.

The move to 6.66% highlights how closely home loan costs are tracking broader economic and geopolitical worries. With inflation concerns still in focus, the housing market is facing another stretch of expensive borrowing.