For nonprime loans, a 20 percent down payment is very common. There are, however, some government-backed loans that may require as little as 3.5 percent down payment.
For non-prime mortgage loans, the minimum down payment varies per lender and loan type. Usually, it is higher than that of a conventional loan. This is to compensate with the riskiness of the borrower. It is highly advised that a borrower shops for different nonprime lenders because down payment requirements vary.