If you’re shopping for a home, you’re
probably asking “how much can I afford?” So it’s important to know how lenders will
determine your maximum affordability. We’ve brought in mortgage agent Drew Donaldson to
walk you through two calculations: gross debt service ratio, and total debt service ratio. Lenders use two formulas to determine whether
you can afford a home. First is gross debt service ratio, or GDS.
Now, let’s run through an example of GDS. First, you have your mortgage payment. Then,
you have your property taxes. Finally, you have your monthly heating cost.
Now, if you’re buying a condo we’d actually take half that maintenance fee and add that
in, but because you’re buying a home we’re gonna run with this.
Now last, we have what your income is. So that’s a monthly income – five-thousand-four-hundred-and-seventeen
– that annualizes to sixty-five-thousand dollars a year and gives you a final GDS of
twenty-eight-point-eleven per cent. Now, since your GDS is of twenty-eight-point-eleven
per cent it falls within the industry standard of thirty-two per cent. Before you’re approved
for a mortgage, however, the lender also calculates your total debt service ratio, or TDS.
Now, TDS is very similar to GDS although it takes into account some very important other
debts that the client happens to have including, for this example, a car payment. Also this
client happens to have a student loan. Now if they had alimony, credit cards, that type
of thing – it would be included in this as well.
Now, we take all of this and divide it by the income which gives us thirty-six-point-six
per cent TDS. When referring back to the TDS industry standard of forty per cent, we can
now see that this client would be able to afford this property according to her TDS
of thirty-six-point-six per cent. Since this client falls well within the industry
standard of both GDS and TDS, they’re well on their way to being approved for a mortgage.