In October 2021, the Australian Prudential Regulation Authority directed authorised deposit-taking institutions to limit new high-DTI lending, specifically, to hold the share of new residential mortgage lending at DTI ratios above 6 times gross income to no more than 30% of total new lending flows. While the policy was framed as a macro-prudential safeguard, its practical effect on individual borrowers has been significant and, for many experienced property investors, deeply frustrating.
The DTI cap does not distinguish between a borrower with weak financial fundamentals and one with a substantial net asset position, strong rental income coverage, and a multi-decade track record of property investment. It is a blunt, portfolio-level instrument applied at the lender level, and its impact falls disproportionately on investors rather than owner-occupiers.
Debt-to-income ratio is calculated as total debt divided by gross annual income. For a borrower with $2 million in total mortgage debt and a gross household income of $250,000, the DTI ratio is 8x, well above the 6x threshold. Under APRA's guidance, an ADI would be reluctant to extend further credit to this borrower regardless of the loan-to-value ratio, rental income stream, or quality of security.
The calculation encompasses all debt, not just the proposed new facility. This means that experienced investors who have responsibly built a portfolio over many years, and whose rental income substantially offsets their debt servicing, are penalised for their investment success rather than assessed on their actual risk profile.
Non-bank lenders, mortgage managers, credit funds, and specialist finance companies, are not subject to APRA's DTI guidance in the same way as ADIs. While they apply their own credit standards, they are not constrained by APRA's portfolio-level DTI restriction and can assess applications using a full manual underwriting approach.
This allows non-bank lenders to credit-assess borrowers on the merits: net asset position, rental income coverage ratios, historical repayment behaviour, asset quality, and the specific merits of the proposed transaction. For borrowers who have been declined by a bank despite strong fundamentals, this is often the difference between funding and not funding.
There is a prevailing misconception that non-bank lending is a product of last resort, a fallback for borrowers with poor credit histories. For the DTI cap refugee cohort, this framing is entirely wrong. These are creditworthy, asset-rich borrowers who have been caught by a regulatory instrument designed to address systemic risk at the portfolio level, not individual credit quality.
For investors and advisors who understand this dynamic, non-bank lending is a legitimate, strategic tool, one that enables continued portfolio growth during the regulatory constraint period, with a clear pathway to refinance back to bank rates once circumstances change.
APRA's DTI cap is a structural constraint on bank lending that creates a persistent demand gap for non-bank alternatives. For creditworthy property investors who exceed the 6x threshold, non-bank lenders offer a legitimate, well-priced solution, not a compromise.
The DTI cap is not going away in the near term. APRA has signalled that macro-prudential tools will remain part of its regulatory toolkit as long as household debt levels remain elevated relative to income. Investors who understand this landscape, and who have relationships with advisors capable of accessing non-bank solutions, are better positioned to continue building wealth than those who assume bank finance is the only route available.