Well start here for deliquency rates in the US. https://fred.stlouisfed.org/series/DRSFRMACBS https://fred.stlouisfed.org/series/DRSFRMACBS A rate of 2-4% is

Well start here for deliquency rates in the US. https://fred.stlouisfed.org/series/DRSFRMACBS https://fred.stlouisfed.org/series/DRSFRMACBS A rate of 2-4% is about average for the US, I'm told most lenders model default rates of up to 8%, though given 2008 I'm guessing 10% will be seen in some forecasts from now on. As a side note, the above site fred.stlousfed.org has some of the best clean data that you can find for free for modelling purposes And lenders always want to be repaid as there is no incentive for them to repossess a house as its auctioned off and the owner get any excess return above what they own.