This page explains the formulas, factors, and data sources behind every estimate on MyInsuranceCalcs.com, so you can understand where our numbers come from and how far to trust them.
Each calculator starts from a national baseline premium for that coverage type and multiplies it by a series of documented risk factors. For auto insurance, that means age, vehicle, coverage level, mileage, credit tier, accident history, and state; for other lines, the factors that actually drive that product's pricing. The result is returned as a low-to-high monthly range rather than a single number, because real carriers price the same customer differently.
Insurance pricing is set by each carrier's proprietary underwriting model, which we cannot see. Our estimates approximate the market using published averages and known rating factors, so we present a range and label it clearly as an educational estimate. Only a licensed insurer can give you a binding quote.
Our baselines and factor weights are derived from publicly available industry data, including rate filings and averages published by the National Association of Insurance Commissioners (NAIC), the Insurance Information Institute (Triple-I), and consumer-protection guidance from the Consumer Financial Protection Bureau (CFPB). Each calculator's "About This Estimate" section lists the sources behind it and the month its factors were last reviewed.
Because we use published averages rather than any single insurer's model, individual quotes will vary -- sometimes substantially -- from our estimates, based on discounts, surcharges, and state rules we cannot see. Our tools do not collect your data, pull your credit, or transmit anything to insurers. Treat every result as a starting point for comparison, and always gather real quotes from licensed insurers before making a decision. Content is maintained by De Van Do; see our About page and editorial standards.