How are the factors weighted?
In most cases, complaint history drives a business’s letter-grade rating. Nearly 85 percent of the scoring is determined by consumer-reported complaints that have been verified and evaluated by BBB, such as the number of complaints, the severity of complaints and how a business resolves complaints. There are though, some overarching factors that will impact a business’s rating even if there have been no complaints to date, such as: how long the business has been operating, government actions, and advertising and competency license issues.