INTEREST RATE vs. APR
What is the difference between the interest rate and the APR?
You'll see an interest rate and an Annual Percentage Rate (APR.) for each mortgage loan you see advertised. The easy answer to "why" is that federal law requires the lender to tell you both.
The APR is a tool for comparing different loans, which will include different interest rates and also different fees associated with the loan. The APR is designed to represent the "true cost of a loan" to the borrower, expressed in the form of a yearly rate. This way, lenders can't "hide" fees and upfront costs behind low advertised rates.
While it's designed to make it easier to compare loans, it's sometimes confusing because the APR includes some, but not all, of the various fees and insurance premiums that accompany a mortgage. And since federal law requires lenders to disclose the APR but does not clearly define what goes into the calculation, they can vary from lender to lender and loan to loan.
The APR on a loan tied to a market index, like a 5/1 ARM, assumes the market index will never change. The problem is that ARMs were invented because the market index DOES change and that makes fixed rate loans either cheaper or more expensive to make (depending on the market) -- that's why they're variable rate in the first place!
I hate to be confusing, but APRs are at best…inexact. The lesson is that APR can be a guide as to what loan to choose, but you need a mortgage professional to help you find truly the “best” loan for you.
**Note when you're browsing for loan terms that the APR will not tell you about balloon payments or prepayment penalties, or how long your rate is locked. Also, you'll see that APRs on 15-year loans will carry a higher relative rate due to the fact that origination points are amortized over a shorter period of time.
