With my reassignment at work, I am required to have an automobile. I looked around at my options and I am having a pre-owned vehicle inspected tomorrow.
If everything checks out — that is if I can afford to make the repairs required to certify it — then I will need insurance before I finalize the sale.
I have been looking around for auto insurance and there are several comparison sites and sites that give free quotations.
After entering personal information and driving history there are still several options on coverage and deductible. Those inputs affect what premium I would pay.
I decided to collect data from one particular provider for $1,000,000 coverage and graph the results to see the cost and sensitivity of difference choices.
So below is annual premium graphed over collision deductible. The different series are comprehensive deductible.

It seemed to max out at 13 quotes so I had to be strategic about what data to choose, so I could get the best picture of what options I should take.
I got this message after a while:
You have exceeded the number of premium calculations permitted. In order for us to better assess your needs, we invite you to communicate with one of our insurance professionals at the following number . . .
You can see how the lowest deductibles result in the highest premiums. But as the deductibles increase along the x-axis and through the series (in rainbow order) the premiums decrease exponentially. In some cases a change in deductible of $500 results in a change of a few dollars over the year.
It’s also interesting to see how much the premium still is even after the deductible exceeds the value of the car. It shows how much a part of the premium covers liability.

