The best time to renew your car insurance is typically before your current policy expires. It's generally recommended to start shopping for a new policy about a month before your current one expires. This allows you enough time to compare quotes from different insurance providers and make an informed decision. Renewing early also helps ensure that you don't have a coverage gap, which could leave you unprotected in case of an accident. Additionally, renewing early may also help you avoid potential rate increases if you wait until the last minute. It's important to review your policy and consider any changes in your circumstances, such as a change in driving habits or the purchase of a new vehicle, to ensure that your coverage still meets your needs. Ultimately, the best time to renew your car insurance is before your current policy expires, giving you ample time to compare options and make any necessary adjustments to your coverage.