I have fixed the interest rates for not even half of the planned repayment period. People keep insisting that you absolutely have to fix them for the entire term and that interest rates will definitely rise... For me, it's all gambling... I might as well go to a casino and bet on red or black. Looking at the interest rate curve over the last 70 years, a clear trend can be seen... however, this does not allow any conclusions about the future... therefore, arguing that interest rates will rise sharply seems unfounded to me. And even if they do, building a refinancing in 10 years with a 5-year fixed interest rate will probably still be cheaper for me. Unless Greece, Italy, Spain, France, Portugal, and others have left the Euro. And even then, the exit of these states would most likely be accompanied by substantial inflation.