December 3, 2007
Many borrowers would like a mortgage on which the monthly payment would
drop following a large payment to principal. They may have highly
irregular income, or they may anticipate coming into a large sum of
money from, e.g., a bonus, bequest or insurance settlement.
Mortgages fall into four categories with regard to how responsive they
are to this need. Standard fixed-rate mortgages (FRMs) are the least
responsive, next come standard adjustable rate mortgages (ARMs), then
any FRM or ARM with an interest-only option, and finally the Home
Ownership Accelerator (HOA), which is the most responsive.
Fixed-Rate Mortgages (FRMs)
Extra payments on an FRM shorten the payoff period but do not affect the
monthly payment. For example, if you borrow $100,000 for 30 years at 6%,
your fully-amortizing payment is $599.56. Pay this amount every month,
and you pay off the loan in 30 years. If you make an extra payment of
$10,000 in month 2, your payment in month 3 and all subsequent months
remains $599.56. Your loan will pay off in month 280, but until then,
you receive no payment relief. For more on FRMs, see
Fixed-Rate Mortgages.
Of course, the lender can always agree to modify the contract, and some
will do it for a fee. In the previous example, the payment could be
dropped to $539.48, which is the fully amortizing payment that will pay
off the loan over the original 30 years.
Adjustable Rate Mortgages (ARMs)
With an ARM on which the borrower is making the fully amortizing
payment, extra payments do change the monthly payment, but not until the
next rate adjustment. At that point, the payment is recalculated using
the reduced balance and the original term.
Assume the $100,000 6% loan is a three-year ARM, and that an extra
payment of $10,000 is made in month 2. The payment would remain at
$599.56 through month 36. In month 37, assuming the rate stayed at 6%,
the payment would drop to $525.62. That is the new fully amortizing
payment over the original term.
On ARMs with longer initial rate periods, the drop in payment following
an extra payment would be further delayed. On the popular 5-year ARM,
for example, the payment wouldn’t drop until month 61.
ARMs become more responsive after the initial rate period ends because
rate and payment adjustments then occur more frequently – in most cases,
every year or very 6 months. See
Can I Pay Off an
Adjustable Rate Mortgage Early?
Mortgages With an Interest-Only Option
If a loan is interest-only, the payment should decline in the month
following an extra payment, whether the loan is fixed-rate or
adjustable-rate. The interest only payment on the $100,000 loan at 6% is
$500. Following the payment of $10,000 in month 2, the interest-only
payment should drop to $450 in month 3.
There are several caveats to this sensitivity, however. One is that it
doesn’t always work the way it should because not all servicing systems
can handle it properly. In some cases, the required new payment is
properly calculated but the new amount has not been communicated to the
borrower. In other cases, the payment adjustment is delayed, sometimes
for a year, sometimes for longer.
Of course, if it is an ARM, the payment will adjust when the rate
adjusts. If it is fixed-rate, however, the payment may not change until
the end of the interest-only period, which would be 5 or 10 years.
Whether the mortgage is FRM or ARM, after the end of the interest-only
period, payment responsiveness disappears. After that, they are like any
other FRM or ARM. See
What Is an Interest-Only Mortgage?
If you are contemplating an interest-only loan and find immediate
payment adjustments in response to extra payments a highly desirable
feature, ask about it. Don’t expect the subject to be volunteered by the
loan officer or mortgage broker. They are not involved in loan servicing
and the chances are that they don’t know the answer and will have to
ask. Make sure they do.
Home Ownership Accelerator (HOA)
The most responsive type of mortgage is the HOA, because it has no
required payment, only a maximum balance. So long as the actual balance
is lower than the maximum, the borrower need make no payment at all. See
The CMG Plan: Your Mortgage as a Checking Account.
HOA borrowers who make lump sum payments to reduce the balance and want
to reduce payments to the fully amortizing level, can just go ahead and
do it. While the HOA servicer will not tell them what that new payment
is (I am told that this will be remedied at some point), it is very easy
to find that number using my calculator 7a,
Monthly Payment Calculator: Fixed-Rate Mortgages. Because HOA is an
ARM that adjusts monthly, the fully amortizing payment will change a
little every month, so borrowers who want to stay on track ought to
repeat the exercise periodically.