One of Progressive’s add-on coverages includes a “disappearing deductible” option. This means that each year you don’t file a claim, Progressive will drop your rate by 25%. With this method, the company boasts that you could eventually have a $0 deductible. But it only stays this way as long as you haven’t filed a claim — if you do, your deductible will go right back up. Safeco also incentivizes safe driving with low deductibles. Safeco will reduce your collision deductible by $100 each year you don’t have a claim, but this incentive caps at $500.
Protected self-insurance is an alternative risk financing mechanism in which an organization retains the mathematically calculated cost of risk within the organization and transfers the catastrophic risk with specific and aggregate limits to an insurer so the maximum total cost of the program is known. A properly designed and underwritten Protected Self-Insurance Program reduces and stabilizes the cost of insurance and provides valuable risk management information.
The main difference between collision and comprehensive coverage comes down to the question of what the driver controls. Collision insurance will cover events within a motorist's control or when another vehicle collides with your car. Comprehensive coverage generally falls under "acts of God or nature," or things that are typically out of your control when driving. These can include events such as a spooked deer, a heavy hailstorm, or a carjacking.