Mortgage loan types 
There are many types of mortgage loans. The two basic types of amortized loans are the fixed rate mortgage (FRM) and adjustable rate mortgage (ARM).
In a FRM, the interest rate, or mortgage rate as some call it, and hence monthly payment, remains fixed for the life (or term) of the loan. In the U.S., the term is usually for 10, 15, 20, or 30 years. In the UK the fixed term can be as short as five years, after which the loan reverts to a variable rate (which makes the loan an ARM).
In an ARM, the interest rate is fixed for a period of time, after which it will periodically (annually or monthly) adjust up or down to some market index. Common indices in the U.S. include the Prime Rate, the LIBOR, and the Treasury Index ("T-Bill"). Other indexes like 11th District Cost of Funds Index, COSI, and MTA, are also available but are less popular.
Adjustable rates transfer part of the interest rate risk from the lender to the borrower, and thus are widely used where unpredictable interest rates make fixed rate loans difficult to obtain. Since the risk is transferred, lenders will usually make the initial interest rate of the ARM's note anywhere from 0.5% to 2% lower than the average 30-year fixed rate.
In most scenarios, the savings from an ARM outweigh its risks, making them an attractive option for people who are planning to keep a mortgage for ten years or less.
A partial amortization or balloon loan is one where the amount of monthly payments due are calculated (amortized) over a certain term, but the outstanding principal balance is due at some point short of that term. A balloon loan can be either a Fixed or Adjustable in terms of the Interest Rate. Many Second Trust mortgages use this feature. The most common way of describing a balloon loan uses the terminology X due in Y, where X is the number of years over which the loan is amortized, and Y is the year in which the principal balance is due.
Other loan types
* blanket loan
* bridge loan
* budget loan
* deed of trust
* home equity loans
* hard money loan
* package loan
* participation mortgage
* reverse mortgage
* repayment mortgage
* seasoned mortgage
* term loan or interest-only loan
* wraparound mortgage
* Negative amortization loan
Costs involved in a mortgage
Lenders may charge various fees when giving a mortgage to a mortgagor. These include entry fees, exit fees, administration fees and lenders mortgage insurance. There are also settlement fees (closing costs) the settlement company will charge. In addition, if a third party handles the loan, it may charge other fees as well.
UK banks usually charge a valuation fee, which pays for a chartered surveyor to visit the property and ensure it is worth enough to cover the mortgage amount. This is not a full survey so it may not identify all the defects that a house buyer needs to know about. Also, it does not usually form a contract between the surveyor and the buyer, so the buyer has no right to sue if the survey fails to detect a major problem. For an extra fee, the surveyor can usually carry out a building survey or a (cheaper) "home buyers survey" at the same time. | 
