What is a Mortgage?
A mortgage loan is a loan secured by real property through the use of a mortgage (a legal instrument). However, the word mortgage alone, in everyday usage, is most often used to mean mortgage loan.
A home buyer or builder can obtain financing (a loan) either to purchase or secure against the property from a financial institution, such as a bank, either directly or indirectly through intermediaries. Features of mortgage loans such as the size of the loan, maturity of the loan, interest rate, method of paying off the loan, and other characteristics can vary considerably.
According to Anglo-American property law, a mortgage occurs when an owner (usually of a fee simple interest in realty) pledges his interest as security or collateral for a loan. Therefore, a mortgage is an encumbrance on property just as an easement would be, but because most mortgages occur as a condition for new loan money, the word mortgage has become the generic term for a loan secured by such real property.
Mortgage lending is the primary mechanism used in many countries to finance private ownership of residential property. For commercial mortgages see the separate article. Although the terminology and precise forms will differ from country to country, the basic components tend to be similar:
- Property: the physical residence being financed. The exact form of ownership will vary from country to country, and may restrict the types of lending that are possible.
- Mortgage: the security created on the property by the lender, which will usually include certain restrictions on the use or disposal of the property (such as paying any outstanding debt before selling the property).
- Borrower: the person borrowing who either has or is creating an ownership interest in the property.
- Lender: any lender, but usually a bank or other financial institution.
- Principal: the original size of the loan, which may or may not include certain other costs; as any principal is repaid, the principal will go down in size.
- Interest: a financial charge for use of the lender's money.
- Foreclosure or repossession: the possibility that the lender has to foreclose, repossess or seize the property under certain circumstances is essential to a mortgage loan; without this aspect, the loan is arguably no different from any other type of loan.

