Not an insurance expert, but my understanding is that generally, the cost of fixing your particular car is a minimal portion of what the company is worried about, and therefore charging you for. So yes, as your Honda Fit ages and becomes less valuable, the absolute amount of money they will have to pay out to fix it (or total it) grows smaller, but if that's only 10% of the concern, it's not going to change much. What they are really worried about is the odds you will have an accident and injure someone causing them to pay out to that party which can get $$$$$$$$ really fast. And your risk pool is based on your car choice, and that risk pool doesn't depreciate the way the car value does. If people who drive 2010 Honda Fits are statistically more likely to get into accidents in 2015, that's not likely to change in 2016, even if your car depreciated 20% over that same time period. Thus, your bill does not decline.