Hi dru1d
The DSR is the Debt Servicing Ratio
Essentially, this means the ratio of money in : money out
For example, if you have Money Out consisting of:
Deemed Living Allowance, $1,000 per month
Credit Cards @ 3% of the Credit Limit, eg $10,000 Card = $300 per month servicing
Mortgage Payments of $2,000 per month
Then Total Committments would be $3,300 per month
If your After Tax Income is $3,300 per month, then you have a DSR of 1:0 meaning no money left over
To achieve a DSR of 1:3 you would need to have 30% left over, ie a monthly After Tax income of $4,290 or thereabouts (someone will, no doubt, tell me I have worked this out wrongly but you get my drift!)
If you have Genuine Savings, then most lenders require a DSR of 1:00 if the Loan to Value Ratio is less than 95%, with Limited Genuine Savings 1:10, if you are borrowing above 95%LVR you may be required to demonstrate DSR of 1:20, so with a DSR of 1:30 you can see that the 106% lenders are building in a healthy safety net for serviceability.
Keep in mind that this is not about your 'Savings'. This is about your Contribution ie what are you putting into the deal. You could have gazzillions of dollars in savings or equity but want to fully fund the deal. This does not mean you have dreadful money habits, this just means that you do not want to put money into the deal.
Lending is not about emotions or moral judgements. It is about setting sensible lending policy which establishes the basis for a healthy, long life deal for both the lender and the borrower. If you can service the deal then the 106% loans secured against a single security can make very good business sense.
Cheers
Kristine