Mine adjusted every month based on the score at the end of the period. The app will have updated premium for next period and accompanied by an email. So if it says July is X, August is Y, then you will pay X in July and on that day, the premium of August will be adjusted depends on your actual score as needed. At the end of the 6 month period, it adjusted based on the mileage used vs the what you agreed on in the policy, mine get closed to so they increased it. I just noticed the policy link disappeared from my tesla account, will check with them to see why tomorrow.