Refinancing is treated as a new loan. The new lender gives you no credit for the rate you were approved at years ago. It assesses your income, expenses, debts and property value as they stand today, at an assessment rate set today. A borrower with a perfect repayment record can fail that test and stay stuck on a higher rate than new customers are offered.
This guide explains what causes the problem, how to tell whether it applies to you, and the options to work through in order, starting with those that need no new credit assessment. It also explains the difference between being a mortgage prisoner and being in financial hardship, because the help available is different.
What a mortgage prisoner is
The term describes a borrower who wants to refinance, would save money by doing so, has never missed a repayment, and is declined or told not to apply because they do not meet current lending criteria. The loan is performing. The borrower is locked out of the offers that lenders reserve for new customers.
It became a common problem in Australia after interest rates rose sharply from 2022. Many people had borrowed close to their maximum when rates were very low. When fixed terms ended or variable rates climbed, the same loan had to be tested at a much higher assessment rate. The guide to the fixed rate cliff covers that group.
What causes it
The serviceability buffer
APRA, the banking regulator, expects banks to test whether a new borrower could still afford repayments if the interest rate were at least 3 percentage points higher than the loan rate. APRA lifted the buffer from 2.5 to 3 percentage points in October 2021 and has kept it there in its reviews since, including in 2026. A loan offered at an illustrative 6.0% is therefore assessed at 9.0% or more. Lenders also set a minimum floor rate and use whichever is higher.
The buffer applies to new lending, and a refinance to another lender is new lending. Your current lender does not re-test you each year, which is why you can stay where you are without any trouble but cannot move.
Other changes since the loan was written
| Cause | What changed | Effect on a refinance |
|---|---|---|
| Higher assessment rate | Loan rates rose, so rate plus buffer rose too | Assessed repayment is far higher than at approval |
| Reduced income | Parental leave, fewer hours, one income, lost overtime | Less income to cover the assessed repayment |
| Higher expenses or debts | Children, school fees, car loan, credit cards, study debt | Lower surplus in the lender's calculator |
| Fall in property value | LVR moves above 80% or 90% | Mortgage insurance applies again, or few lenders will accept the loan |
| Interest only expiry | Principal must be repaid over the remaining term | Higher repayments and fewer lenders offering a new interest only term |
| Employment change | New job, probation, contracting or self-employment | Income may not be accepted until a track record exists |
Several of these often apply at once, and small changes in each can add up to a decline.
A fall in value deserves a specific mention. Lenders mortgage insurance does not transfer between lenders, so a refinance above 80% LVR usually means paying a new premium, which can wipe out the saving. Above 90% very few lenders will refinance at all. There is a separate guide to refinancing when your property value has dropped. Self-employment is another common trigger, because most lenders want one to two years of tax returns before they accept the income.
Worked example: approved then, declined now
A couple borrowed $600,000 over 30 years when rates were low. Their actual rate was an illustrative 2.5%, and the lender assessed them at an illustrative 5.0%. The assessed repayment was $3,221 a month. The lender's calculator showed they could afford up to $3,900 a month after living expenses, so the loan was approved.
Five years later they owe $550,000 with 25 years remaining. Their rate has risen to an illustrative 6.6%, so they pay $3,748 a month, and they have never missed a payment. Another lender is offering an illustrative 6.0%, which would cut the repayment to $3,544, a saving of about $204 a month or roughly $2,450 a year. Living costs have risen faster than their pay, so a lender's calculator now shows capacity of $4,000 a month.
| Scenario | Assessment rate | Assessed repayment | Capacity | Result |
|---|---|---|---|---|
| Original $600,000 loan, 30 years | 5.0% | $3,221 | $3,900 | Pass, $679 spare |
| Refinance $550,000, 25 years, 3 point buffer | 9.0% | $4,616 | $4,000 | Fail by $616 |
| Refinance $550,000, 30 years, 3 point buffer | 9.0% | $4,425 | $4,000 | Fail by $425 |
| Refinance $550,000, 25 years, reduced 1 point buffer | 7.0% | $3,887 | $4,000 | Pass, $113 spare |
All rates, capacity figures and results are illustrative. Each lender calculates capacity differently.
The couple pay $3,748 now and want to pay $3,544. They fail because the new lender must test them at $4,616. Stretching the term to 30 years helps but is not enough here. Under a reduced buffer policy the same couple would pass.
How to tell if you are a mortgage prisoner
Your current lender has no reason to re-test you, so the signs usually show up when you start comparing. Knowing when to refinance a home loan is the first step. These checks tell you whether the door is open to you.
- Your rate is clearly above what lenders advertise to new customers for a similar loan.
- A borrowing power calculator shows a maximum loan below your current balance.
- Your estimated LVR is above 80%, based on a realistic recent value.
- Your household income has fallen, or you have added debts or dependants since approval.
- You have recently changed jobs, started a business or moved to contract work.
Avoid testing the question by lodging applications with several lenders. Each application leaves an enquiry on your credit file, and a run of declines makes the next one harder. A specialist can run serviceability calculators for a range of lenders without lodging anything.
The first options to try, in order
1. Ask your current lender to reprice
A rate reduction on your existing loan is not new credit, so it needs no new serviceability assessment and no valuation. Ask for the rate offered to new customers on the equivalent product, and be specific about the competing offers you have seen. Lenders often have discretion to discount to keep a good customer. Moving to a cheaper product with the same lender is a related option that often needs little or no reassessment.
2. Like for like or dollar for dollar refinance policies
Some lenders have offered refinance policies that apply a reduced buffer, commonly around 1 percentage point, to borrowers who fail the standard test. APRA has said banks can make exceptions to policy where these are limited and managed prudently. These policies are not universal, and lenders can change or withdraw them at any time. Where you qualify, it is the closest match to a standard rate and term refinance and usually the cheapest exit. Typical conditions include the following.
- The new loan is for the same amount, with no cash out and no debt consolidation.
- A clean repayment history on the home loan and other debts, commonly for 12 months or more.
- The new repayment must be lower than the current one.
- Principal and interest repayments, with an LVR limit such as 80% and sometimes no extension of the term.
3. Extending the loan term
A new 30 year term lowers both the actual and the assessed repayment, and can be enough to pass. The cost is time. In the example above, $550,000 at an illustrative 6.0% costs about $124,000 more in total interest over 30 years than over 25, unless you make extra repayments to stay on the original schedule.
Other ways to improve your position
Non-bank and specialist lenders
APRA's buffer applies to banks and other authorised deposit-taking institutions. Non-bank lenders are not regulated by APRA. They must still meet responsible lending obligations and many use a similar buffer, but some assess differently or accept income and credit histories that banks will not. Rates and fees can be higher. See refinancing with bad credit.
Reduce debts and limits first
Lenders commonly assess credit cards on the full limit, often at about 3% of the limit per month, whether or not you use it. Closing unused cards, lowering limits, clearing a car loan or a buy now pay later account, and trimming discretionary spending for a few months can lift your capacity.
Guarantor or debt consolidation
Where LVR is the barrier, a family guarantee using a relative's property as extra security can bring the LVR down, though it puts their property at risk. Consolidating expensive debts into the home loan can cut monthly commitments, but it spreads short-term debt over decades. Both need careful advice.
If none of these work today, set a review date. A pay rise, a paid-off car loan, a lower LVR after another year of repayments, or two years of self-employed tax returns can each change the outcome. A fixed rate expiry is also a natural point to renegotiate.
Fixed rate ended and you cannot afford the new repayment: this is hardship, and here is what to do
A mortgage prisoner is meeting repayments and wants a cheaper loan. If the jump when your fixed rate rolled to variable has left you unable to make the repayment at all, or you have already missed one, that is financial hardship, and the help available is different. It also needs to be used in the right order, because once arrears show on your credit file the refinance options above narrow sharply.
What counts as hardship for a mortgage
Hardship is any change that leaves you unable to meet your repayments without going without reasonable living costs. Illness, job loss and separation are the familiar causes, but a repayment increase caused by a rate rollover qualifies in the same way when the household budget genuinely cannot absorb it. You do not need to have missed a payment first. Under the credit law a lender must consider a hardship request, must respond in writing within a set period, and must give reasons if it refuses. You do not need to use any special form, but putting the request in writing, with a simple budget showing what you can pay, makes it harder to brush aside.
The variations lenders actually offer
| Variation | What it does | Effect on the balance | Effect on the credit file |
|---|---|---|---|
| Repayment pause or reduction | Repayments stop or drop for a period, commonly a few months | Interest keeps accruing and is added to the loan, so the balance grows | Recorded as financial hardship information for a period; missed payments under the arrangement are not reported as late |
| Interest only for a period | Principal repayments stop, the repayment falls to interest alone | Balance stays flat instead of falling | Usually recorded as a hardship arrangement |
| Extending the loan term | Remaining balance is spread over a longer term, often back to 30 years | Lower repayment, more total interest, nothing added to the balance | May be treated as a permanent variation rather than hardship, depending on the lender |
| Capitalising arrears | Missed repayments are added to the loan and the account is brought back to current | Balance rises by the arrears plus interest | Clears the arrears going forward; earlier missed months may already have been reported |
Lenders can combine these, for example a short pause followed by a longer term. Ask what each option does to the balance and the repayment at the end of the arrangement before you accept it.
The honest limit of hardship assistance is that it is built for temporary trouble. If the lender concludes the shortfall is permanent, it may offer time to sell rather than a variation. That is still better than enforcement, because you control the sale.
How long you can be in arrears before it gets serious
A repayment more than 14 days late can be reported as a missed payment in your repayment history, and that record stays visible for two years. Once you are a month or more behind, most lenders will issue a formal default notice. That notice gives you a set period, at least 30 days, to bring the account up to date or reach an agreement, and if nothing happens they can start enforcement, which ends in a mortgagee sale. A default listed on your credit file stays for five years and closes most mainstream refinance doors. The whole point of acting early is to get an arrangement in place before any of these marks appear.
Can you still refinance when you fail the bank's buffer?
Sometimes, and it is worth testing before a missed payment is recorded, because afterwards it is rarely possible. The three paths are the ones described earlier on this page: a like for like refinance under a reduced buffer of around 1 percentage point, which needs a clean repayment history and the same loan amount; a specialist or non-bank lender that assesses closer to the actual repayment rather than the rate plus 3 points, usually at a higher rate; and a new lender that resets the term to 30 years so the monthly figure comes back within reach. The test is simple. If the new repayment, at a rate you will actually be charged, fits a realistic budget, a refinance can fix the problem permanently. If it does not, a refinance only delays it, and hardship or a sale is the better answer.
The order of steps before a default notice arrives
- Contact your lender's hardship team first, ideally before the next repayment falls due, and tell them the fixed rate has ended and the new repayment does not fit.
- Put the request in writing with a short budget and the repayment you can manage. Keep a copy and note the date and the name of anyone you speak to.
- Keep paying what you can while the request is considered. Partial payments reduce the arrears and show good faith.
- See a free financial counsellor through the National Debt Helpline. They can check the budget, deal with the lender on your behalf and tell you whether the offer you receive is reasonable.
- Have a broker test the refinance paths above against lender calculators at the same time, without lodging an application, so you know whether a permanent fix exists.
- Escalate to AFCA, the free external dispute scheme, if the lender refuses without reasons, stalls past its response deadline, or keeps collection activity going while a hardship request is open.
When selling now beats hanging on
Selling is the right call when the shortfall is not temporary, no refinance brings the repayment within reach, and you still have equity. Every month of a pause or interest only arrangement adds to the balance and eats that equity. A sale on your own terms, with time to prepare the property and choose the agent, almost always returns more than a mortgagee sale after a default notice. If you decide to sell, tell the lender, ask for a hardship arrangement to cover the selling period, and confirm in writing that enforcement will not proceed while the property is listed in good faith. Once the loan is cleared and repayments on any other debts are stable, a future home loan refinance or purchase is realistic again.
Common mistakes mortgage prisoners make
Most of these cost money quietly, month after month.
Assuming nothing can be done
Many borrowers hear one decline and stop. Meanwhile they keep paying a rate well above what the same lender gives new customers. A repricing request needs no assessment and can be repeated every six to twelve months.
Ask your current lender for a rate review, with competing offers in hand.
Applying to several lenders to see what happens
Each formal application adds an enquiry to your credit file. Several enquiries and declines in a short period can lower your credit score and make lenders more cautious, which shrinks the options you started with.
Have your numbers tested against lender calculators before any application is lodged.
Refinancing above 80% LVR without costing the insurance
Lenders mortgage insurance is not transferable. If your LVR is above 80%, a new lender will usually charge a new premium, often added to the loan. That cost can exceed several years of interest savings.
Compare the total cost of switching, including insurance and fees, with a reprice from your current lender.
Waiting until repayments are missed
Once arrears appear on your credit report, mainstream refinance options narrow sharply and reduced buffer policies are generally off the table. Acting while your repayment history is still clean keeps the most doors open.
If money is getting tight, contact your lender's hardship team before a payment is missed.
