The amount of the early withdrawal penalty is based on the amount withdrawn and the term of your account. The penalty schedule is as follows:
Terms of 12 months or less = 90 days' dividends
Terms longer than 12 months = 180 days' of dividends
The penalty is calculated as a forfeiture of part of the dividends that have been or would be earned on the account. It applies whether or not the dividends have been earned.