You may have seen some recent commentary about APRA tightening its focus on something called the Debt-to-Income ratio, or DTI.
A couple of clients have asked whether this changes everything.
Short answer?
👉 Not really.
👉 But it’s worth understanding.
First — What Is DTI?
Your Debt-to-Income ratio (DTI) is simply:
Your total debt divided by your gross annual income.
For example:
- Total debt: $900,000
- Income: $150,000
DTI = 6
So your debt is six times your income.
APRA (the banking regulator) considers DTIs above 6 to be higher risk lending.
Why Does APRA Care?
From a regulator’s perspective, high DTI borrowers are more exposed if:
- Interest rates rise
- Income drops
- Property values fall
- Rental income reduces
Even if a borrower technically passes serviceability buffers, very high debt relative to income can create vulnerability in a stressed environment.
So APRA has reinforced guidance that:
Banks should limit the proportion of new lending written at DTIs of 6 or higher.
Importantly, this is directed at banks (APRA-regulated lenders) – not non-bank lenders.
Hasn’t This Always Been the Case?
Yes.
For years, most major banks have already:
- Flagged DTI ≥ 6 as higher risk
- Required escalations or additional assessment
- Limited exposure at very high DTI levels
What’s changed isn’t the number – it’s the formal reinforcement and monitoring of it.
So in many ways, this is business as usual… just more closely watched.
Who Does This Actually Affect?
Here’s the interesting part:
Most everyday borrowers don’t hit a DTI of 6 anyway.
In many cases, borrowing capacity taps out due to serviceability buffers before DTI becomes the limiting factor.
Where it tends to show up is with:
- Investors with very low living expenses
- People living rent-free with family
- Borrowers whose owner-occupied mortgage is mostly paid down
- High-income, highly leveraged portfolio investors
Because their personal expenses are low, serviceability calculators allow them to borrow quite aggressively.
That’s when DTI can become the governing constraint.
Does This Mean Borrowing Power Has Collapsed?
No.
It means:
- Some high-leverage investor strategies may face more scrutiny
- Certain banks may be less flexible at higher DTIs
- Structuring and lender selection matter more
But it’s not a hard cap for individuals.
It’s a portfolio cap for banks – meaning they can still approve DTI ≥ 6 loans, just in limited proportions.
What About Non-Bank Lenders?
APRA regulates banks.
There are still many non-bank lenders in the market.
They’ve always operated slightly differently – sometimes more flexible on structure, sometimes priced differently, sometimes with different assessment styles.
That hasn’t changed.
So while banks may tighten at the margins, there are still options depending on the borrower’s situation.
The Practical Takeaway
For most borrowers:
- This won’t change your borrowing capacity.
- If you were comfortably below a DTI of 6, nothing really changes.
- If you’re pushing leverage aggressively, lender choice becomes critical.
The bigger point is this:
Just because you can borrow at a high DTI doesn’t always mean you should.
Regulators are focused on system stability.
Borrowers should be focused on personal sustainability.
Those aren’t always the same thing.
If you’re unsure where your DTI sits – or whether this affects a current plan – it’s easy to calculate and assess properly before making any decisions.
As always, structure and strategy matter more than headlines.