The basics
What makes a loan jumbo
Fannie Mae and Freddie Mac buy most home loans, up to a limit set each year for each county and number of units. A loan above that limit is a jumbo loan. Because the agencies do not buy it, each jumbo program writes its own rules.
Each program sets its own rules for the down payment, credit and the savings you keep after closing, and the rules tighten as the loan grows. Most programs ask for full income documents, and larger loans may need two appraisals.
Jumbo programs do not charge mortgage insurance, whatever the loan-to-value. Loans can be fixed or adjustable, for a main home, a second home and, in several programs, a rental property.