Usage time accrues while you’re actively using your WorkSpace as well as the time it takes to stop after a specified period of inactivity, which by default is set to an hour. If you exceed the Free Tier limits, you are charged the standard Amazon WorkSpaces hourly rates for the additional resources that you use. At the end of two calendar months, the WorkSpaces you launched in the Free Tier will automatically be billed at standard hourly rates. For more information, see, Amazon WorkSpaces Pricing.