The Annual Percentage Rate (APR) was created with good intentions to make complicated things if not simple, then at least simpler. It even works in many cases! Unfortunately, it also fails in just as many other cases, which sort of devaluates it as a universally reliable tool.
The APR looks a lot like an interest rate, because it is also a percentage. However, it is quite a different parameter. The APR is the sum of the interest rate and a theoretical percentage rate derived from other then the interest, fees associated with a mortgage: points, pre-paid interest, origination fees, attorney and notary fees, closing agent’s document preparation fees, PMI. Third party services, such as appraisals or credit reports, are not included. The purpose of this rate is to summarize all the costs of a mortgage into one number and help a potential borrower make a more informed choice. The borrower should be able to compare mortgages by comparing their APRs. Ideally, a mortgage with the APR of, say, 6.25% should be a better deal than a mortgage with a 7% APR, implying that the latter’s closing costs are higher. The APR is usually higher than the quoted interest rate, but it does not influence your real monthly payments. The monthly payments are dependent on the interest rate; the APR is a purely technical theoretical parameter developed to assist the choice of a potential borrower. It immediately gives one the overall idea of the costs involved. Even though in real life these costs are upfront and paid in a lump sum, the artificially created APR assumes, that the total amount of the origination fees & Co is rather spread over all the years of the loan’s life. A little bit of this money is allocated to each monthly payment, as if you were paying the origination fees bit by bit all through the years. It is only an assumption in order to produce a number called the APR in order to help you as a borrower to compare different mortgage offers. Federal law requires that the APR be disclosed alongside the actual interest rate. For example, if you are looking at two otherwise identical offers – one of 5% interest rate and 6.5% APR, the other of 5% interest rate and 7% APR – the conclusion is obvious: the former offer is better, because you get the same mortgage with lower closing costs. Unfortunately, this is about the only situation, when the APR gives us a fair and reliable comparison. If the interest rates are different, the APR can be quite misleading. For example, if we have two mortgage offers with identical APRs of, say, 8%, but different interest rates of 5% and 5.5%, the decision immediately becomes more complicated than these two numbers. Why is one rate lower? How many points does it cost? Is it worth for you personally paying the points? There are other issues as well.
To explain that I will first have to use an oversimplified and unrealistic example: assume you have a basic (no PMI, no escrow etc.)30-year fixed rate mortgage for $100,000 at 5%. The closing cost you $10,000. Each monthly payment consists of a certain amount towards the principal to repay $100,000 and an amount towards the interest. The APR calculation does not simply add the $10,000 closing costs to the balance; it rather treats it as a second no-interest loan with a term equal to the term of the main mortgage. The easiest way would be to take the $10,000 and distribute it evenly throughout all the 360 months of the 30 years, but it would be an absolute amount, no more descriptive or comparative than just knowing the closing costs. To create a relative parameter, the closing costs pay off amount allocated to each month is a percentage of the outstanding balance of the main mortgage; the balance shrinks with time as it gets paid off, so the amount derived from it as a percentage also changes. The APR is the percentage rate that provides enough flow to pay off $10,000 through 30 years plus the interest rate of the mortgage itself. As you can see, the calculation is not all that simple after all, that is why the use of specialized calculators is highly recommended when checking the APRs provided by lenders.
Why check?
The APR provided by a lender assumes that the borrower sticks to the mortgage for all the 30 years of its life. The closing costs are spread throughout all the 30 years, which means that the pay off amount allocated to each month is lower than if you keep the 30 year mortgage for 10 years only. The same amount spread over a shorter period of time gives us a higher monthly payment towards the upfront costs, i.e. a higher APR. The point here is: if you know that you will not keep the mortgage for all its term, do not rely on the lender’s APR. Use a calculator where you can enter the expected period to estimate the real APR of the mortgage offers you are considering. You can also fiddle with the down payment and points amounts to see which combination produces a better APR.
There are several other situations where an APR-based comparison fails to perform: cash-out refinancing vs. the cost of a second mortgage; a mortgage with negative points; a HELOC.
While comparing the costs of a cash-out refinancing with a second mortgage, a borrower is provided with the APRs of the second mortgage and the new mortgage s/he refinances into. That’s what s/he is offered to compare. However, the real life equation is more complicated: the losses caused by the usually higher interest rate of the refinanced into mortgage are not taken into account. For example, you have a 6% mortgage with the outstanding balance of $100,000 and 10 years to go. You need another $20,000, i.e. either a second mortgage of $20,000 or a new mortgage of $ 120,000. If the interest rate on the $120,000 mortgage is higher than 6%, a difference in the cost of each dollar from the $100,000 borrowed the old way and the new way will occur. The refinancing APR does not take this difference into account, thus failing to describe all the costs of the refinancing, thus making the APR comparison of these two solutions inaccurate and misleading.
There are no universally agreed rules as to how to calculate negative points into an APR. Every lender has it his own way, which makes the APR provided rather useless – it cannot be used for a reliable comparison of products.
A proper HELOC should not involve any costs non-rechargeable at closing. This way the APR is just equal to the interest rate. A borrower should rather be concerned about the initial teaser rate and the rate margins and caps, while selecting a HELOC product. The APR disclosure is required by law, but not the disclosure of caps or margins!
