Zip offers two payment solutions: Zippay for purchases under $1000, and Zipmoney for purchases over $1000.
Zippay customers have until the end of the month to repay the total amount due. If you need extra time to pay off your balance you'll just need to pay the monthly minimum of $40, and a $6 account fee will be added to your balance for the following month. If you repay the total amount, the $6 account fee is waived.
Zipmoney customers can schedule their repayments to be made weekly, fortnightly or monthly as long as you pay the minimum of $40 per month (or whatever is left owing). You can make additional payments which will not incur any fees, and will not stop your schedule from running.