Very few home buyers have the cash available to buy a home outright. Most of us will turn to a financial institution for a mortgage, the first step in a potentially long-standing relationship. But even with a mortgage, you will need to raise the money for a down payment. The down payment is that portion of the purchase price you furnish yourself. The amount of the down payment (which represents your financial stake, or the equity in your new home) should be determined well before you start house hunting. The larger the down payment, the less your home costs in the long run. With a smaller mortgage, interest costs will be lower and over time this will add up to significant savings.