Annual Percentage Rate (APR) is an expression of the effective interest
rate that the borrower will pay on a loan, taking into account one-time fees and standardizing the way the rate is
expressed. In other words the APR is the total cost of credit to the consumer, expressed as an annual percentage of the amount of
credit granted. APR is intended to make it easier to compare lenders and loan options.
The APR is likely to differ from the "note rate" or "headline rate" advertised by the lender, due to the addition of other
fees that may need to be included in the APR.
In the US and the UK, lenders are required to
disclose the APR before the loan (or credit application) is finalized. Credit card companies can advertise monthly interest
rates, but they are required to clearly state the annual percentage rate before an agreement is signed. APR is a term used with
regards to deposit accounts as well. However, when dealing with deposit accounts, Annual Percentage Yield APY or Annual Equivalent Rate AER is the number to be quoted to
consumers for comparison purposes.
Rate format
An effective annual interest rate of 10% can also be expressed in several
ways:
- 0.7974% effective monthly interest rate
- 9.569% annual interest rate compounded monthly
- 9.091% annual rate in advance.
These rates are all equivalent, but to a consumer who is not trained in the mathematics
of finance, this can be confusing. APR helps to standardize how interest rates are compared, so that a 10% loan is not
made to look cheaper by calling it a loan at "9.1% annually in advance".
The APR does not necessarily convey the total amount of interest paid over the course of a year. APR, in the simple case of a
loan with no fees (or, say, a credit card), is the monthly interest rate multiplied by 12.
In the case of a loan with no fees, the amortization schedule would be worked
out by taking the principal left at the end of each month, multiplying by the monthly rate and then subtracting the monthly
payment. This can be expressed mathematically by
- where:
- P0 is the initial principal
- r is the percentage rate used each payment
- n is the number of payments
This also explains why a 15 year mortgage and a 30 year mortgage with the same APR would have different monthly payments and a
different total amount of interest paid. There are many more periods over which to spread the principal, which makes the payment
smaller, but there are just as many periods over which to charge interest at the same rate, which makes the total amount of
interest paid much greater. For example, $100,000 mortgaged (without fees, since they add into the calculation in a different
way) over 15 years costs a total of $193,429.80 (interest is 93.430% of principal), but over 30 years, costs a total of
$315,925.20 (interest is 215.925% of principal).
In addition the APR takes costs into account. Suppose for instance that $100,000 is borrowed with $1000 one-time fees paid in
advance. If, in the second case, equal monthly payments are made of $946.01 against 9.569% compounded monthly then it takes 240
months to pay the loan back. If the $1000 one-time fees are taken into account then the yearly interest rate paid is effectively
equal to 10.31%.
The APR concept can also be applied to savings accounts: imagine a savings account with 1% costs at each withdrawal and again
9.569% interest compounded monthly. Suppose that the complete amount including the interest is withdrawn after exactly one year.
Then, taking this 1% fee into account, the savings effectively earned 8.9% interest that year.
Failings
Despite repeated attempts by regulators to establish usable and consistent standards, APR does not represent the total cost of
borrowing nor does it really create a comparable standard. Nevertheless, it is considered a reasonable starting point for an
ad-hoc comparison of lenders.
Does not represent the total cost of borrowing
Credit card holders should be aware that most US credit cards are quoted in terms of nominal APR compounded monthly, which is
not the same as the effective annual rate (EAR). Despite the "Annual" in APR, it is not necessarily a direct reference for the
interest rate paid on a stable balance over one year. The more direct reference for the one-year rate of interest is EAR. The
general conversion factor for APR to EAR is EAR=((1+APR/n)^n)-1, where n represents the number of compounding periods of the APR
per EAR period. E.g., for a common credit card quoted at 12.99% APR compounded monthly, the one year EAR is
((1+.129949/12)^12)-1, or 13.7975% (see Credit card interest for the .000049
addition to the 12.99% APR). Note that a high US APR of 29.99% carries an effective annual rate of 34.48%.
While the difference between APR and EAR may seem trivial, because of the exponential nature of interest these small
difference can have a large effect over the life of a loan. For example, consider a 30-year loan of $200,000 with a stated APR of
10.00%, i.e., 10.0049% APR or the EAR equivalent of 10.4767%. The monthly payments, using APR, would be $1755.80. However, using
an EAR of 10.00% the monthly payment would be $1691.78. The difference between the EAR and APR amounts to a difference of $64.09
per month. Over the life of a 30-year loan, this amounts to $23,070.90, which is over 11% of the original loan amount.
Some classes of fees are deliberately not included in the calculation of APR. Because these fees are not included, some
consumer advocates claim that the APR does not represent the total cost of borrowing. Excluded fees may include:
- routine one-time fees which are paid to someone other than the lender (such as a real estate attorney's fee)
- penalties such as late fees or service reinstatement fees without regard for the size of the penalty or the likelihood that
it will be imposed.
Lenders argue that the real estate attorney's fee, for example, is a pass-through cost, not a cost of the lending. In effect,
they are arguing that the attorney's fee is a separate transaction and not a part of the loan. Consumer advocates argue that this
would be true if the customer is free to select which attorney is used. If the lender insists on using a specific attorney
however, then the cost should be looked at as a component of the total cost of doing business with that lender. This area is made
more complicated by the practice of contingency fees - for example, when the lender receives money from the attorney and other
agents to be the one used by the lender. Because of this, US regulators require all lenders to produce an affiliated business
disclosure form which shows the amounts paid between the lender and the appraisal firms, attorneys, etc.
Lenders argue that including late fees and other conditional charges would require them to make assumptions about the
consumer's behavior — assumptions which would bias the resulting calculation and create more confusion than clarity.
Not a comparable standard
Even beyond the non-included cost components listed above, regulators have been unable to completely define which one-time
fees must be included and which excluded from the calculation. This leaves the lender with some discretion to determine which
fees will be included (or not) in the calculation.
Consumers can, of course, use the Nominal interest rate and any costs on the
loan (or savings account) and compute the APR themselves, for instance using one of the calculators on the internet.
In the example of a mortgage loan, the following kinds of fees are:
|
Generally included:
|
Sometimes included:
|
Generally not included:
|
The discretion that is illustrated in the "sometimes included" column even in the highly regulated US home mortgage
environment makes it difficult to simply compare the APRs of two lenders. Note: US regulators generally require a lender to use
the same assumptions and definitions in their calculation of APR for each of their products even though they cannot force
consistency across lenders.
With respect to items that may be sold with vendor financing, for example, automobile leasing, the notional cost of the good
may effectively be hidden and the APR subsequently rendered meaningless. An example is a case where an automobile is leased to a
customer based on a "manufacturer's suggested retail price" with a low APR: the vendor may be accepting a lower lease rate as a
trade-off against a higher sale price. Had the customer self-financed, a discounted sales price may have been accepted by the
vendor; in other words, the customer has received cheap financing in exchange for paying a higher purchase price, and the quoted
APR understates the true cost of the financing. In this case, the only meaningful way to establish the "true" APR would involve
arranging financing through other sources, determining the lowest-acceptable cash price and comparing the financing terms (which
may not be feasible in all circumstances). For leases where the lessee has a purchase option at the end of the lease term, the
cost of the APR is further complicated by this option. In effect, the lease includes a put
option back to the manufacturer (or, alternatively, a call option for the consumer), and the value (or cost) of this
option to the consumer is not transparent.
Dependence on loan period
APR is dependent on the time period for which the loan is calculated. That is, the APR for one loan with a 30 year duration
loan cannot be compared to the APR for another loan with a 20 year loan duration. APR can be used to show the relative
impact of different payment schedules (such as balloon payments or bi-weekly payments instead of straight monthly payments), but
most standard APR calculators have difficulty with those calculations.
Furthermore, most APR calculators assume that an individual will keep a particular loan until it is completely paid off
resulting in the up-front fixed closing costs being amortized over the full term of the loan. If the consumer pays the loan off
early, the effective interest rate achieved will be significantly higher than the APR initially calculated. This is especially
problematic for mortgage loans where typical loan durations are 15 or 30 years but where many borrowers move or refinance before
the loan period runs out.
In theory, this factor should not affect any individual consumer's ability to compare the APR of the same product (same
duration loan) across vendors. APR may not, however, be particularly helpful when attempting to compare different products.
Interest-only loans
Since the principal loan balance is not paid down during the interest-only term, the total interest paid over the lifetime of
the loan is increased and the APR is higher than a loan without an interest-only payment period.
Non-repeatable
Two lenders with identical information may still calculate different APRs. The calculations can be quite complex and are
poorly understood even by most financial professionals. Most users depend on software packages to calculate APR and are therefore
dependent on the assumptions in that particular software package. While differences between software packages will not result in
large variations, there are several acceptable methods of calculating APR, each of which returns a slightly different result.
Region-specific details
USA
In the US, the calculation and disclosure of APR is governed by the Truth in Lending
Act (also known as Regulation Z). In general, APR in the United States is expressed as the periodic interest rate times the number of
compounding periods in a year[1] (also known as the
nominal interest rate); since the APR must include certain non-interest charges
and fees, however, requiring more detailed calculation.
The calculation for "close-ended credit" (such as a home mortgage or auto loan) can be found here.
The calculation for "open-ended credit" (such as a credit card, home equity loan or other line of credit) can be found here.
European Union
In the EU, the focus of APR standardization is heavily on the standardization of the time-value of the interest calculation.
As of Oct 2005, the EU still allows Member States to determine the specific cost-components to be included in the APR
calculation.
A single method of calculating the APR was introduced in directive 98/7/EC and is required to be published for the major part
of loans. The basic equation for calculation of APR in the EU is:
-

- where:
- M is the number of cash flows paid by the lender
- l is the sequence number for the cash flows paid by the lender (draw down)
- Sl is the cash flow (drawdown) in period l
- N is the total number of cash flows paid by the borrower
- k is the sequence number of the cash flows paid by the borrower (repayment)
- Ak is the cash flow (repayment) of period k, and
- tl and tk is the
interval, expressed in years and fractions of a year between the date of the first cash flow and the date of cash flow
l or k. (t1 = 0.)
In this equation the left side is the present value (PV) of the draw downs made by the
lender and the right side is the present value of the repayments made by the borrower. In
both cases the present value is defined given the APR as the interest rate. So the
present value of the drawdowns is equal to the present
value of the repayments, given the APR as the interest rate.
Note that neither the amounts nor the periods between transactions are necessarily equal. For the purposes of this
calculation, a year is presumed to have 365 days (366 days for leap years), 52 weeks or 12 equal months. An equal month is
presumed to have 30.41666 days regardless of whether or not it is a leap year. The result is to be expressed to at least one
decimal place. This algorithm for APR is required for some but not all forms of consumer debt in the EU. For example, this EU
directive is limited to agreements of €50,000 and below and excludes all mortgages.[1]
In the Netherlands the formula above is also used for mortgages. In many cases the mortgage is not always paid back completely
at the end of period N, but for instance when the borrower sells his house or dies. In
addition there is usually only one payment of the lender to the borrower: in the beginning of the loan. In that case the formula
becomes:
-

- where:
- S is the borrowed amount
- A is the prepaid onetime fee
- R the rest debt, the amount that remains as an interest-only loan after the last cash
flow.
If the length of the periods are equal (monthly payments) then the summations can be simplified using the formula for a
geometric series. Either way the APR can only be solved iteratively from the formulas
above, apart from trivial cases such as N = 1.
UK
APR was introduced under the Consumer Credit Act 1974, to ensure
comparability of loans - and is required to be published for all regulated loans. The APR must be more prominent than any other
rate or charge.
The method used to calculate APRs in the EU and UK is different from that used in the US and will often produce different
(higher) results. This is because the US method (regulation 'Z') produces what would, in the UK, be called a nominal annual rate whereas the UK/EU method results in an effective annual rate.
See also
References
External links
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