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Hi there! Sam from Moz's Help Team here - sorry about any confusion! Your credit card will not be charged at any point during your 30-day trial, but we do perform a $1 authorization on your account to ensure your credit card is valid, which is then immediately voided. After your 30-day trial, you will be charged each month thereafter. If you decide that Moz isn't for you, you can cancel anytime, both during and after your trial. I hope this helps to explain - do let me know if you have any follow up questions!