What is mortgage prison?
Mortgage prison is the term used to describe a borrower who cannot refinance their home loan, even when doing so would reduce their repayments or put them on a better deal.
The "prison" metaphor is apt: you can see better rates and products on offer at other lenders, but you cannot get to them. Your current lender knows this and has little incentive to offer you their best rate. You are, in effect, a captive customer.
The term covers three distinct situations, which are explained in detail below. Understanding which type applies to your situation is the first step toward finding a way out.
The three types of mortgage prison
1. Serviceability prison (most common)
This is by far the most common type in Australia right now.
When you apply to refinance, any new lender must assess whether you can afford the loan. Under APRA rules, they test whether you can afford repayments at your actual interest rate plus 3 percentage points. This is the serviceability buffer.
The problem: if you originally borrowed when rates were at historic lows (2020 to 2022), you likely passed the stress test easily. But when you try to refinance today, with actual variable rates sitting around 6.0 to 6.5%, the stress test is run at 9.0 to 9.5%. That is a dramatically higher hurdle, and many borrowers who can comfortably afford their current repayments cannot pass it for a new loan.
The cruel irony: you may be paying your mortgage without missing a single repayment, but a new lender will still reject you because you cannot theoretically afford a rate 3% higher than what they would actually charge you.
As of May 2026, with the RBA cash rate at 4.35% and APRA confirming in July 2025 that the 3% buffer stays unchanged, this remains the primary barrier for hundreds of thousands of Australian borrowers.
2. Equity prison
This type occurs when your property's value has fallen since you borrowed, leaving you with less than 20% equity in your home.
When you refinance to a new lender, they conduct a fresh property valuation. If your property is now worth less than when you bought it, or if your loan balance has not reduced much because you have been on interest-only repayments, your loan-to-value ratio (LVR) may be above 80%.
At above 80% LVR, the new lender will require you to pay Lenders Mortgage Insurance (LMI). Depending on the loan size, LMI can cost $8,000 to $20,000 or more, which often cancels out any interest savings from switching. In extreme cases where LVR exceeds 90 to 95%, some lenders will refuse the application outright.
This type of mortgage prison was widespread between late 2022 and mid-2024, when Australian property prices fell in many markets. It is less common now as values have broadly recovered, but it still affects borrowers in regional areas and high-density apartment markets where values have been slower to rebound.
3. Credit prison
The third type occurs when your credit profile has deteriorated since you took out your original loan.
A credit score that was excellent when you first applied may have slipped due to missed payments, a credit card default, a buy-now-pay-later account reported as overdue, or simply having applied for too much credit in a short period. A credit enquiry from a failed loan application can itself lower your score.
Lenders reserve their best refinancing rates for borrowers with clean credit records. If your score has dropped, you may find that any new lender prepared to take you on charges a rate that is no better than what you already have, making the exercise pointless.
How many Australians are in mortgage prison?
The numbers are significant. At the peak of the rate-hiking cycle in 2023, Roy Morgan data found that over 1.5 million mortgage holders (30% of all borrowers) were at risk of mortgage stress. NAB publicly estimated that 15 to 20% of their own book were caught in a mortgage trap.
Compare Club data from early 2023 found that the number of Australians at risk of mortgage prison had jumped 42% since the RBA started raising rates, with around 700,000 borrowers in an LVR trap alone. NSW had the highest concentration, with 19% of refinancing enquiries coming from borrowers with an LVR above 91%.
While the rate environment has shifted since then (the RBA delivered rate cuts through 2025 before hiking rates three times in early 2026), APRA's buffer has not moved. Borrowers who were locked in at low fixed rates and have since rolled onto variable rates continue to face the same serviceability wall when they attempt to switch lenders.
Am I in mortgage prison? Three questions to ask yourself
You do not need a broker to do an initial check. Work through these three questions:
Question 1: The serviceability test. Take your current variable rate and add 3%. Can you demonstrate to a lender that your household income, after all expenses, would cover repayments at that higher rate? If not, you are in serviceability prison.
For a rough check: on a $600,000 loan at a 6.25% actual rate, repayments are approximately $3,690 per month. The stress test runs at 9.25%, which pushes repayments to approximately $4,940 per month. That extra $1,250 per month must be covered by your income surplus after declared living expenses.
Question 2: The equity test. What is your property approximately worth today? Divide your remaining loan balance by that value. If the result is above 0.80 (80%), you have less than 20% equity. If it is above 0.90 (90%), refinancing with a new lender is likely to trigger LMI costs, making switching uneconomical.
Question 3: The credit test. Have you missed any repayments in the past two years, taken on significant new debt, or had any accounts sent to collections? If yes, pull a free copy of your credit report from Equifax, Experian, or illion (all three offer free reports) and check your score before you apply anywhere. A rejected application creates another credit enquiry, which further damages your score.
If you answered "yes" to any of these, keep reading. There are ways out of each type.
Six escape routes from mortgage prison
1. Refinance with your current lender (no stress test required)
The most overlooked option. When you refinance with the same lender by switching to a different product on their menu, APRA's serviceability buffer does not apply in the same way. Your lender can assess your ability to service the new loan based on your actual repayment history rather than running a full stress test.
This means you may be able to negotiate a meaningfully lower rate with your existing lender without needing to pass a 9%+ stress test. The downside is that your lender knows it has you captive and may not offer its sharpest rate. Come prepared with competitor rates and be willing to push back.
2. Use the APRA "non-material increase" exemption
APRA's rules include a provision known as the non-material increase exemption. Under this provision, a new lender can waive the standard serviceability buffer assessment if the refinance does not materially increase the borrower's total debt.
In practice, this typically means the new loan cannot exceed the existing loan balance by more than a small amount (one major bank set this at $50,000 at the time of writing). The borrower must also declare that their financial situation has not materially changed.
This exemption has allowed some mortgage prisoners to cross to a new lender and access a better rate without needing to clear the full 9%+ hurdle. Not all lenders offer this, and the conditions vary. Ask your broker specifically whether any lender on their panel has a policy covering this exemption.
3. Consider a non-bank lender
Non-bank lenders (lenders who are not authorised deposit-taking institutions, or ADIs) are not subject to APRA's serviceability buffer rules. They set their own assessment criteria, which are often less conservative.
This does not mean non-bank lenders are reckless. They still assess your ability to repay. But their stress test may be run at a lower rate than 3% above the actual rate, or they may rely more heavily on your actual financial history than on a hypothetical scenario.
Non-bank lenders generally charge slightly higher rates than major banks, but if the alternative is staying with a lender charging a revert rate that is 0.5 to 1.0% above the market, the calculation can still work in your favour. Run the numbers carefully with a broker before committing.
4. Pay down your loan to improve equity
If your LVR is close to 80%, a relatively modest lump sum payment may be enough to push you below that threshold and unlock refinancing. For example, on a $700,000 property with a $580,000 loan (83% LVR), paying down $21,000 reduces your loan to $559,000 and gets you to 79.9% LVR.
At an LVR under 80%, you avoid LMI entirely and gain access to the full market. If you have funds sitting in an offset account, a redraw facility, or a savings account earning less than your mortgage rate, this is worth considering.
Bheja.ai's lump-sum repayment calculator shows you how much a single payment reduces your LVR and how that affects your refinancing options.
5. Wait and build equity through repayments
If your property value has recovered and you have been making principal and interest repayments, your LVR may already be improving. Pull a property estimate through CoreLogic, Domain, or your broker before assuming you are still trapped. Many borrowers who were in equity prison in 2023 are no longer trapped in 2026.
6. Work on your credit score before applying
If credit is your barrier, time and clean repayment history are the main remedies. Default listings stay on your file for five years; late payment markers for two years. In the interim, make every payment on time, reduce your credit card limits (even on cards you do not use), and do not submit multiple loan applications in quick succession.
A good broker can run a soft credit check to assess your situation without leaving a footprint on your credit file.
What Mortgage Prison is not?
A common misconception: mortgage prison does not mean you cannot afford your current repayments. In fact, many mortgage prisoners are paying their mortgages on time every month. The prison is specifically about the inability to switch, not the inability to pay.
This distinction matters because it means the problem is systemic, not personal. Borrowers are trapped not because they are financially irresponsible, but because a regulatory framework designed to protect them from over-borrowing, in a higher-rate environment, also prevents them from accessing a better deal.
Is mortgage prison the same as mortgage stress?
No. Mortgage stress occurs when your repayments consume too high a proportion of your income, typically defined as 30-45% of household income. Mortgage prison is specifically about the inability to refinance. The two can overlap: a borrower under mortgage stress may desperately want to switch to a lower rate but be in mortgage prison because they cannot pass the serviceability test needed to do so.
The bigger picture: APRA, the buffer and the political debate
The 3% serviceability buffer has become one of the most debated lending policies in Australia's housing market.
Supporters argue the buffer has helped protect borrowers and the financial system by ensuring people can continue to afford their home loan repayments if interest rates rise. The sharp increase in interest rates between 2022 and 2023 reinforced the importance of testing borrowers against higher repayment scenarios.
Critics argue the current buffer is overly restrictive in today's lending environment. They say assessing borrowers at an interest rate three percentage points above the actual loan rate can reduce borrowing capacity, make it harder for eligible buyers to enter the market, and limit some homeowners' ability to refinance to a more competitive loan.
Industry groups, including the Housing Industry Association (HIA) and the Property Council of Australia, have called for the buffer to be reduced. However, following a review in 2025, APRA retained the serviceability buffer at 3%. Since February 2026, banks have also been subject to APRA's new debt-to-income (DTI) lending limits, which cap the proportion of new home loans with a DTI ratio of six or more at 20% of new lending.
For borrowers, the key takeaway is simple: the 3% serviceability buffer remains in place today. If you're considering a new home loan or refinancing, it's worth understanding how the buffer affects your borrowing capacity and speaking with your lender or broker about your options.
