APRA Introduces Debt-to-Income Limits. What Doctors Need to Know

APRA, the banking regulator, has announced its first formal debt-to-income (DTI) limit, marking a significant shift in how banks assess and manage mortgage risk. While this applies to all borrowers, the implications for medical professionals are distinct and worth understanding early.

What Has Changed?

APRA will now restrict banks from issuing more than 20% of new loans to borrowers with a DTI above six times their income.

A simple example:

Borrowing $1 million on a $166,666 income = 6× DTI.

The cap applies separately to:

• Owner-occupier lending
• Investor lending

At present, only a small portion of lending exceeds the six-times threshold, meaning the new cap is not immediately restrictive. But APRA has been clear this is a pre-emptive move, and further limits (particularly for investors) remain possible.

Why APRA Is Doing This

APRA is responding to:

• increased high-DTI lending
• rising property prices
• faster credit growth
• concerns that lending above 6× DTI carries elevated long-term risk

Investor loans are a key focus because they tend to drive price cycles and are more likely to be sold in downturns.

This is the first macroprudential tightening since interest-only and investor restrictions were phased out in 2018.

What This Means for Doctors

Doctors generally enjoy strong borrowing capacity, but career timing, cashflow variability and complex structures can make DTI management more nuanced. Here’s how the change affects different cohorts.

1. Most doctors won’t feel an immediate impact

Banks are currently well below the new 20% limit.
For established GPs, specialists, or fellows with stable incomes, borrowing capacity should remain largely unchanged in the short term.

2. Early-career doctors may experience closer scrutiny

Registrars and IMGs often have:

• fluctuating ABN income
• limited savings
• higher upfront costs (exams, relocation, immigration)
• mixed PAYG/contracting arrangements

This can temporarily push DTI higher.
Banks may respond with:

• more conservative income assessment
• stricter documentation requirements
• slower approval for investment lending

This reinforces the importance of early tax planning before a purchase or relocation.

3. Practice buy-ins must now be sequenced more carefully

Buying into a practice often requires:

• personal lending
• business or entity-level borrowing
• aligned service or partnership agreements

If personal DTI is already stretched, securing additional funding becomes harder.
This is why we model practice-buy-in lending pathways 12–24 months ahead.

4. Doctors building investment portfolios should monitor DTI closely

Multiple investment properties can quickly push DTI beyond six—especially if structures (trusts/companies) are not aligned with lender policy.

Future impacts may include:

• rationing of high-DTI investor loans
• reduced borrowing capacity
• tighter refinancing conditions

A periodic and regular lending review is becoming essential, not optional.

How Doctors Can Prepare

Check your current DTI

Most doctors don’t know their true DTI, especially if they have mixed income streams or multiple loans.

Plan major decisions early

New jobs, relocations, home purchases and practice buy-ins should be sequenced well in advance.

Align structure, tax and lending

Misalignment is one of the biggest, and most avoidable causes of DTI issues and borrowing delays.

Stabilise cashflow

Banks favour predictable income and buffers, especially for IMGs and early-career doctors navigating tax timing.

The Bottom Line

APRA’s new DTI limit signals a shift toward long-term lending stability. For doctors, the real message is clear:

Lending decisions now require earlier planning, cleaner structures, and stronger alignment between income, entities and borrowing strategy.

Want to Understand How This Affects Your Borrowing Capacity?

If you’re planning a home purchase, investment property, relocation, or practice buy-in, now is the right time to get clarity on your DTI position and lending readiness.

You can start with our Doctor Financial Scorecard — a doctor-specific diagnostic that identifies structural, cashflow and lending risks before they become costly mistakes.

It takes a few minutes and provides a clear starting point for informed decision-making.

→ Start your Doctor Financial Scorecard
→ Or contact us if you have an upcoming lending or practice purchase decision

Tommy Li, CA

Director, Verity Advisory  |  Registered Tax Agent  |  Authorised Financial Adviser (ASIC Rep No. 1261831)  |  Member, Chartered Accountants Australia & New Zealand

Tommy is a Chartered Accountant with 20+ years advising medical professionals on tax, financial structure and practice decisions. He founded Verity Advisory to provide integrated advice for doctors at career-defining financial inflection points — combining tax, lending and financial planning into a single structured approach.