The first step to achieving home ownership is establishing
affordability. Current household expenses (taken from your budget) and debt
payments (i.e. Car Loans, Student Loans, and Credit Cards) are good indicators
of current spending patterns. If this level spending is unreasonable, the
ability to cover mortgage payments may be compromised. Addressing this spending
before considering home ownership is an important step.
There are two important benchmarks that best determine
affordability. The first is the Gross Debt Service (GDS) ratio, which is
defined as the percentage of income dedicated to essential housing expenses. It
is calculated as follows:
GDS = Monthly PITH / Monthly Gross Income x 100%
PITH refers to the Principal, Interest, Property Taxes,
and Heating Costs for a given property.
If a condominium is being purchased, this should also include any condo fees.
The established rule of thumb is that GDS should not exceed 32%, but this has
been known to fluctuate, depending on lender requirements and the buyer's
credit-worthiness.
The second benchmark incorporates monthly debt payments into
determining affordability. This is known as the Total Debt Service (TDS) ratio,
a value that should not exceed 40%, in order to be considered for a mortgage.
The TDS is calculated as follows:
TDS = (Monthly PITH + Monthly Debt Payments) / Monthly Gross Income x
100%
To better demonstrate the importance of these benchmarks, let's
use the GDS as an example. Suppose I make $50,000/year in gross income, which
translates into $4,167/month. Assuming a GDS of 32%, we get a PITH of
$1,333/month. Again assuming a desired property tax of $2400/year (or
$200/month) and a heating cost of $100/month, the maximum blended payment
(Principal + Interest) we can afford is $1,033/month. If we qualify for a
mortgage with a 25-year amortization at an annual rate of 4%, we get an
interest factor of 190.25, resulting in a mortgage valued at approximately
$197,000. With a 20% down payment, the highest affordable property price would
be $246,250, far too low for the current Toronto market.
Instead, let's assume a combined family income of $100,000/year,
resulting in a monthly gross income of $8,333/month. Again using a GDS of 32%,
and the assumed tax and heating expenses above, a maximum blended payment of
$2,367/month is found. Using the same mortgage criteria and down payment
percentage, the highest affordable property price would be approximately
$563,000. This is well within the range of listed home prices in Toronto.
Keep in mind this is a rough calculation of affordability, with
a number of uncertain assumptions. For instance, property tax will fluctuate,
depending on the assessed value of the owned property, as well as the tax rate
charged per year by the city. You could determine, by trial and error, the
property tax best associated with the final affordable property price, but this
is more effort than necessary. It is better to have sufficient resources
available to offset such risk.
We will later discuss establishing a mortgage in greater
detail, as well as the various up-front costs associated with purchasing real
estate.
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