A remortgage (also known as refinancing) is the process of paying off one mortgage with the proceeds from a new mortgage using the same property as security. The term is mainly used commercially in the United Kingdom, though what it describes is not uniquely British. Often the purpose of switching is to secure a more favorable interest rate from a different lender.
The process of remortgaging does not usually involve moving home or taking out a second mortgage on the property; it is in effect the transfer of a mortgage from one lender to another. Homeowners may choose to remortgage for various reasons, including to reduce the size of repayments, to pay off a mortgage earlier, to raise capital, or to consolidate other debts.
Homeowners often mis-use the expression remortgage when they are simply switching from one product to another with the same lender; this is not a remortgage which involves the removal of one legal charge over a property and its substitution with another in favour of a new lender.
A mortgage is a method of using property (real or personal) as security for the performance of an obligation, usually the payment of a debt.
The term mortgage (from old French, lit. dead pledge[1][2]) refers to the legal device used for this purpose, but it is also commonly used to refer to the debt secured by the mortgage, the mortgage loan.
In most jurisdictions mortgages are strongly associated with loans secured on real estate rather than other property (such as ships) and in some cases only land may be mortgaged. Arranging a mortgage is seen as the standard method by which individuals and businesses can purchase residential and commercial real estate without the need to pay the full value immediately. See mortgage loan for residential mortgage lending, and commercial mortgage for lending against commercial property.
In many countries it is normal for home purchases to be funded by a mortgage. In countries where the demand for home ownership is highest, strong domestic markets have developed, notably in Spain, the United Kingdom, and the United States.

