<p>They get paid either on the "front end" (origination points), the "back end" (YSP) or a combination of both.</p>
<p>(They may also be paid on extra fees, such as "processing" fees, etc.. The real money is from the above-mentioned items.)</p>
<p>On a zero point loan, virtually all of their earnings will likely come from yield spread premium (as mentioned in the original post).</p>
<p>Lenders are different.</p>
<p>Some lenders put up their very own money to make loans, and then hold on to them. This is called "portfolio lending". They make earnings throughout the life of the loan, in the form of ongoing interest payments.</p>
<p>Most lenders are not of this type.</p>
<p>Most lenders utilize single-purpose credit lines called "warehouse lines", that they are provided with by major institutions.</p>
<p>(The reason so many lenders have gone under, is really because these lines have been curtailed or pulled completely due to a lack of confidence by the warehouse line provider).</p>
<p>Those credit lines give them the ability to "fund" your loan. Your loan is collateral for the warehouse line, until it is taken off the line because it is sold. Most loans are sold off to either the GSEs (the government, or "quasi-governmental" entities like fannie-mae, etc.) or to the "secondary market". The secondary market includes players who bundle these loans into "pools" which are often collateral for "mortgage backed securities".</p>
<p>If they are doing it right, lenders will make a profit on this transaction! There is risk in this transaction, so lenders rightly make a profit from this activity - which is separate from the profit of originating the loan.</p>
<p>(Recently, the secondary market has all but disappeared, so many lenders are sitting with loans on their warehouse lines that have no buyers. Some have sold them at a loss, because the terms of their warehouse lines do not allow them to sit on them.)</p>
<p>From this profit, they pay the person who you are interfacing with on your loan, your "loan officer".</p>
<p>When you do a zero points loan with a lender, you are charged a higher rate than you would be on a loan with points (just like with a broker).</p>
<p>That makes that loan more valuable to an investor (either the GSEs or the secondary market) when it is sold.</p>