The cost of fixed rate mortgages is going up as lenders pass on a rise in wholesale funding costs - or swap rates.
Already Britain's biggest building society, Nationwide, has increased all its fixed rate mortgage deals.
Some borrowers will see their loan rates jump by up to 0.86%.
Other lenders such as Yorkshire Building Society and the state owned Northern Rock have also re-priced some of their fixed rate deals upwards.
We speak to David Hollingworth about the latest developments.