A home insurance deductible calculator is an excellent way to estimate the amount you will need to pay for your home insurance each year. It allows you to estimate your premiums and find out what percentage of the coverage you will need to pay before your insurer starts paying you. For example, if you have a home worth $150,000, you may need to pay a $1,000 deductible, but don't want to commit to paying $2,500 at once. You could save hundreds of dollars by choosing a 1% deductible.