It is possible to use a VA loan with a non-spouse co-borrower who is also not a veteran. However, in such situations, a down payment may be required, ranging from 12.5 to 14.5 percent of the total loan amount. This is due to the VA typically guaranteeing 25 percent of the veteran’s loan, and with only one VA-eligible co-borrower on the loan, the lender may only have half of that guarantee. As a result, the down payment helps to reduce the level of risk for the lender. It is important to remember that a VA loan is a government-backed mortgage designed to assist qualifying veterans or service members in obtaining a home loan.