If you’re looking at buying an Australian apartment to rent out, the lending landscape shifted significantly from 1 February 2026. That’s when the Australian Prudential Regulation Authority (APRA) introduced a cap on high debt-to-income (DTI) lending, limiting banks to only 20% of new mortgages going to borrowers with a DTI of six or higher. For investors, this is the most consequential regulatory change since the serviceability buffer was increased in 2021. Here’s what you actually need to know.
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This article is general information only and does not constitute professional advice. For your specific situation, consult a qualified professional.
On top of the DTI cap, lenders have always treated apartments differently from houses. Apartments under 40 square metres, those in high-density postcodes, or with company title structures can require a deposit of 20–30% rather than the 5% sometimes possible for houses. Combine that with the new lending restrictions, and the window for financing an investment apartment has narrowed. If you’re looking at mortgage lending restrictions for apartments, the rules are tighter than ever.
The central concept here is the debt-to-income ratio.
What I tend to notice is that investors often underestimate how much existing debt pushes them toward the cap. Someone with a $500,000 home loan and a $400,000 investment loan, earning $180,000, is already at a DTI of 5. Adding another apartment loan could tip them over.
What the DTI Cap Actually Changes for Investors
The DTI cap doesn’t ban anyone from borrowing. It limits how many high-DTI loans each bank can write per quarter. Once a bank uses up its 20% allocation, it stops approving applications above 6× DTI until the next quarter. That means borrowers in the restricted category aren’t just competing against lending criteria — they’re competing against each other for a limited number of spots.
Investor lending surged 18% in the September 2025 quarter, and national prices hit records. APRA acted because high-DTI lending had crept up, particularly among investors. Before the cap, 10% of investor loans already exceeded 6× DTI, compared to just 4% of owner-occupier loans. The regulator saw early signs of risk building in the system.
The RBA didn’t help matters. It delivered a surprise rate hike to 3.85% on 3 February 2026 — two days after the DTI cap activated. Higher rates reduce borrowing capacity at the same time the cap restricts access. For someone buying an apartment in a capital city where the median price sits at $1,140,454, the squeeze is real.
One scenario that catches people: a couple earning $280,000 who need $1.9 million to buy in their preferred Sydney suburb has a DTI of 6.8. That’s above the threshold. They’re competing for limited bank quota space, and the same application might get approved at one bank and rejected at another depending on how much of that bank’s quarterly allocation remains.
Where Investors Get Tripped Up
Ignoring Existing Debt When Calculating DTI
Many investors only count the new loan when estimating their DTI. But the calculation includes all debts — home loan, car loan, personal loans, credit card limits (not just balances), HECS, and buy-now-pay-later accounts. Someone earning $120,000 a year with a $540,000 existing mortgage who wants a $700,000 investment loan is looking at a DTI well above 6. That application lands in the restricted category.
Assuming All Apartments Are Treated the Same
Lenders impose stricter conditions on apartments than houses. Units under 40 square metres often require a bigger deposit and may not qualify for Lenders’ Mortgage Insurance. High-density postcodes can trigger loan caps at 80% of property value. Company title properties are harder to sell and subject to first-refusal rights, which makes lenders nervous. Student and serviced apartments are even more restricted — many lenders avoid them entirely because of limited resale potential and pooled rental income structures.
Overlooking Off-the-Plan Risks
Off-the-plan apartments carry the risk that the property might be worth less than expected by the time construction finishes. Builds take 18–24 months, and lending policies can change during that period. Pre-approvals may need to be reviewed, and market shifts can leave buyers unable to secure expected financing. Some buyers have lost their deposits this way. Many lenders cap off-the-plan loans at 80% LVR to reduce their exposure.
Not Checking Postcode Restrictions
Brisbane in 2017 saw unit prices drop to a three-year low due to oversupply. In response, banks capped loans in certain high-risk postcodes at 80% of property value. Those restrictions can reappear in any market where apartment construction outpaces demand. A quick check with your broker on current postcode restrictions can save a lot of wasted effort.
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| Factor | DTI Cap | Serviceability Buffer |
|---|---|---|
| What it targets | Number of high-leverage loans per quarter | Maximum borrowing amount per borrower |
| How it applies | Lender’s quarterly allocation | Universally to all borrowers |
| Non-bank lenders | Not applicable | Applies under responsible lending |
| Exemptions | New dwellings, bridging loans | No exemptions |
How to Structure Your Buy-to-Let Application
Calculate Your DTI Before You Start
Add up every debt you have. Include your home loan balance, investment loan balances, car loans, personal loans, credit card limits (not just the current balance), HECS debt, and any buy-now-pay-later accounts. Divide that total by your gross annual income. If the result is under 5, you’re in good shape. Between 5 and 6, you’re close to the cap. Above 6, you’re in the restricted category and need to compete for limited bank quota space.
Consider New Build or Off-the-Plan Apartments
APRA carved out loans for new dwelling construction and purchases of newly built homes. If you’re buying an apartment that hasn’t been occupied before, the DTI cap doesn’t apply. That’s a significant advantage. The trade-off is that off-the-plan purchases carry valuation risk — the property might be worth less when construction finishes. But for investors with existing debt who would otherwise exceed the DTI threshold, the exemption makes new builds worth a serious look.
Look at Non-Bank Lenders
Pepper Money, Liberty Financial, and Resimac are not subject to APRA’s DTI cap. Their interest rates are typically higher than the major banks, but they can approve loans that the big four can’t. For an investor with a DTI above 6 who needs to move quickly, a non-bank lender might be the only viable path. The higher rate is the cost of access.
Check Apartment Size and Title Structure Early
Before you make an offer, confirm the apartment’s internal size (excluding balconies and car spaces) and its title type. Anything under 40 square metres will likely require a 20–30% deposit. Company title properties face additional scrutiny. Strata title is the most common and easiest to finance. If you’re unsure about the legal structure, it’s worth getting a quick opinion from a real estate law specialist before committing.
Frequently Asked Questions
Does the DTI cap apply to refinancing? ▾
Can I use bridging finance to avoid the DTI cap? ▾
What happens if my apartment is under 40 square metres? ▾
Are student apartments financeable? ▾
Does the serviceability buffer still apply? ▾
What’s the best way to improve my application? ▾
The DTI Cap Is Here to Stay — Plan Around It
The DTI cap isn’t a temporary measure. APRA introduced it because high-DTI lending had become a systemic risk, and the regulator has shown no sign of loosening the rules. For investors buying Australian apartments, the strategy has shifted: know your DTI before you look, prioritise new builds where the exemption applies, and keep non-bank lenders in your back pocket. The days of assuming you can finance any apartment with a standard deposit are over.
Remember: this article is general information only. For advice on your specific situation, speak to a qualified professional.
If this was useful, you might also want to read Understanding Rental Vacancy Rate Trends When Buying an Apartment in Australia.
Sources and Further Reading
Understanding Building Age and Depreciation When Buying an Apartment — Depreciation affects your tax position as an investor, and building age determines what you can claim.
Understanding Strata Fees When Buying Your Apartment — Strata fees are a recurring cost that directly impacts your rental yield and borrowing capacity.
APRA (2026). Macroprudential policy — DTI lending cap. 🔗
Property Investment Professionals (2026). APRA DTI Rules 2026: Complete Guide for Property Investors. 🔗
Savings.com.au (2026). What to consider when getting a loan for an apartment. 🔗
Mortgage Navigators (2026). The DTI Lending Cap and What It Means for Property in 2026. 🔗
