Unlocking Your Borrowing Power: How APRA's Proposed Serviceability Buffer Change Could Reshape Your 2027 Property Goals

If you’ve been asking how much can i borrow home loan australia, APRA’s latest proposal is worth paying close attention to. The banking regulator has begun consultation on reducing the mortgage serviceability buffer from 3.0 percentage points to 2.5 percentage points above the loan interest rate. For borrowers, that may sound technical, but the practical effect is simple: if the change goes ahead, some households may be able to borrow a little more than they can today.

This matters because many buyers are planning well ahead now, not just for the next few months but for their 2027 property goals. Whether you’re a first home buyer, upgrading, investing or refinancing, even a modest lift in borrowing capacity can change the type of property you target, the suburb shortlist you build or the timeline you work to.

At the same time, the market is not standing still. The Reserve Bank of Australia held the cash rate at 3.35% at its September meeting, noting inflation is within target and that it wants to observe the effects of previous hikes. Inflation itself was 2.9% in the year to the June 2026 quarter, which sits within the RBA’s 2–3% target band. Meanwhile, CoreLogic reported that national housing values rose 0.8% in August 2026, the eighth straight month of growth, with auction clearance rates holding in the mid-60% range nationally. That combination helps explain why this APRA consultation is attracting so much attention now.

What APRA has proposed

APRA has released a discussion paper modelling a change to the home loan serviceability buffer from 3.0% to 2.5% above the actual loan interest rate. In plain English, when a lender tests whether you can afford a loan, it does not assess you only at the current interest rate. It applies a higher assessment rate to build in a safety margin.

That safety margin is called the serviceability buffer.

A buffer exists because lenders and regulators want borrowers to be able to cope if rates rise or if household budgets come under pressure. APRA is not proposing to remove the buffer. It is only consulting on a 0.5% reduction.

That may sound small, but in lending policy terms it is meaningful. It has the potential to shift borrowing capacity for a wide group of borrowers, particularly those who are close to the edge of lender servicing calculators today.

Why this matters for borrowing power

For most people, the real question is not the policy mechanics. It is: what could this mean for my borrowing amount?

According to NAB, a 0.5% reduction in the serviceability buffer could increase maximum borrowing capacity for an average household by approximately 4–6%. That is not a guarantee, and actual results vary by lender and borrower profile, but it gives a useful guide to the possible scale of change.

A simple borrowing power example

Let’s say a household can currently borrow $700,000 under today’s settings.

If their borrowing capacity increased by:

• 4%, their maximum might rise to about $728,000
• 5%, their maximum might rise to about $735,000
• 6%, their maximum might rise to about $742,000

That extra $28,000 to $42,000 may not transform every purchase decision, but it can make a difference. It could mean:

• moving from “just short” to “within range” for a target property
• being able to keep a larger cash buffer after settlement
• qualifying for a different lender policy outcome
• refinancing where serviceability was previously too tight

If you want to get a rough sense of your numbers, a borrowing power calculator is a useful starting point. Just remember calculators are indicative only and don’t capture every lender policy.

Who could be affected most

A proposed buffer reduction will not help everyone equally. Some borrowers are more likely to benefit than others.

First home buyers

First home buyers are often the most borrowing-capacity-sensitive group. When deposits are tight and property prices are still rising, a small increase in maximum borrowing can widen the range of homes or locations that are realistically achievable.

If that is you, it is worth pairing borrowing power planning with broader strategy around deposit, guarantees and government support. Our guide to First Home Buyer Loans may help frame the next steps.

Upgraders

Households looking to upsize are often balancing an existing mortgage, selling costs, family expenses and a desired purchase price. A modest lift in borrowing power can improve flexibility, especially if you are trying to buy in a competitive Spring or early 2027 market.

Refinancers

Some borrowers want to refinance for a sharper rate or better features but have found current servicing rules restrictive. A slightly lower assessment hurdle may help certain refinancers who are otherwise good long-term borrowers.

If refinancing is part of your plan, see our Refinance Home Loans page and our Pre-Approval information to understand how lenders typically assess readiness.

Property investors

ABS Lending Indicators show that new owner-occupier loan commitments rose 2.1% in July 2026, while investor loan commitments rose 1.5%. Investors may also benefit from a buffer reduction, although the end result will still depend on rental income treatment, living expenses, other debts and lender policy.

For those weighing an investment purchase, our Investment Property Loans page can help outline the finance considerations.

Self-employed borrowers

Self-employed applicants may benefit from improved serviceability settings, but documentation still matters. Even if the buffer is reduced, lenders will continue to look closely at income consistency, tax returns, business performance and liabilities. A policy change does not remove the need for a clean, well-prepared application.

Why the timing matters heading into 2027

This discussion is landing at an important moment.

We have:

• an RBA cash rate on hold at 3.35%
• inflation at 2.9%, within target
• housing values rising for eight consecutive months
• national auction clearance rates holding in the mid-60% range
• new lending activity lifting for both owner-occupiers and investors

Taken together, those signals suggest a market where confidence is improving, but affordability remains a real issue. If the serviceability buffer is reduced, more borrowers may gain some extra capacity at the same time as competition remains active.

That is why it makes sense to prepare early rather than waiting for a policy change to become final and then rushing into the market.

The opportunities if the change goes ahead

There is good reason borrowers are paying attention to this consultation.

1. A wider property search

A modest increase in borrowing capacity may open up more homes, more suburbs or better property types. For some buyers, it may mean fewer compromises on location, land size or dwelling condition.

2. Better refinancing options

Some borrowers are not trying to borrow more at all. They simply want to refinance to a more suitable loan structure. If servicing has been the obstacle, a lower buffer may help in some cases.

You can also review whether consolidating expensive debts changes the picture, although this needs careful thought. Our Debt Consolidation guide explains the basics.

3. More strategic planning for 2027

If you are buying next year rather than this year, the proposal gives you time to improve other parts of your application too, such as:

• reducing credit card limits
• paying down personal loans or car finance
• tightening discretionary spending
• building genuine savings
• organising tax returns and financials

In other words, the buffer change may help, but preparation still does a lot of the heavy lifting.

The risks and limitations borrowers should understand

This is where it is important to stay grounded.

It is only a proposal at this stage

APRA has commenced consultation. That is not the same as a confirmed rule change. The final outcome may differ from the discussion paper, or the timing could change.

More borrowing power is not always better borrowing

Just because a lender may allow a slightly higher loan amount does not mean you should automatically stretch to the maximum. A larger mortgage can reduce flexibility if rates, childcare costs, insurance, maintenance or general living expenses rise.

Property prices may respond too

If many borrowers gain a little extra capacity at once, that can support demand. In a market where values are already rising, part of the benefit may be absorbed by higher prices rather than purely improved affordability.

Lender policy still varies

Even if APRA changes the benchmark, lenders still apply their own credit policies, living expense measures and risk assessments. Two borrowers with the same income can receive different outcomes depending on their debts, dependants, employment type and credit profile.

What borrowers should do now

If you are serious about buying or refinancing in 2027, this is the practical part.

Know your current position first

Before trying to estimate the effect of any future policy change, understand where you sit under today’s rules. Look at:

• income and employment structure
• existing debts and repayments
• credit card limits
• household living expenses
• deposit size and costs
• any upcoming changes to family or work circumstances

Trim what hurts serviceability

Small adjustments can matter. Common pressure points include:

• unused or high credit card limits
• buy now, pay later commitments
• personal loans and novated leases
• inconsistent spending patterns
• tax debts or other liabilities

Build your evidence early

A stronger application is easier to assess. Depending on your situation, that may mean collecting:

• recent payslips
• PAYG summaries or income statements
• tax returns and notices of assessment
• business financials if self-employed
• savings history
• statements for existing debts

Consider your running costs too

The Federal Government’s Home Energy Advantage scheme is now open, offering eligible households rebates of up to $5,000 for solar panels and battery systems. Lower household energy costs can support overall serviceability by reducing expenses. It may not be relevant for every buyer, but it is a practical reminder that borrowing power is not only about income and rates. Ongoing living costs matter too.

Get prepped, not just pre-approved

Formal Pre-Approval can be useful when the timing is right, but many borrowers benefit first from strategy work: understanding borrowing range, lender fit and what needs cleaning up before an application goes in.

When speaking with a broker can make a real difference

A proposed APRA change is exactly the kind of situation where generic online advice can fall short.

A broker can help you understand:

• how different lenders may interpret your income and expenses
• whether you are likely to benefit materially from a buffer reduction
• whether refinancing now or waiting may make more sense
• what steps could improve your position before you apply
• how to balance borrowing capacity with repayment comfort

This is especially helpful if your situation is not vanilla: self-employed income, overtime or bonus income, multiple debts, family guarantees, a low deposit or plans to keep an existing property as an investment.

If you are mapping out a purchase or refinance for 2027, the useful question is not just how much can i borrow home loan australia. It is also: what is a sensible amount to borrow for my goals, risk tolerance and household budget?

That is the question that leads to a more sustainable decision.

Frequently asked questions

What is the mortgage serviceability buffer?

It is the extra margin lenders add above your actual home loan interest rate when assessing whether you can afford repayments. APRA is consulting on reducing that buffer from 3.0% to 2.5% above the loan rate.

How much could my borrowing power increase if the buffer is reduced?

NAB has projected that a 0.5% reduction in the serviceability buffer could increase maximum borrowing capacity for an average household by around 4–6%. Actual outcomes vary by lender and borrower profile.

Has APRA already changed the buffer?

No. APRA has released a discussion paper and commenced consultation on the proposal. That means the change is not final at this stage.

Will a lower serviceability buffer guarantee home loan approval?

No. Approval is never guaranteed. Lenders still assess income, living expenses, debts, credit history, employment and other policy factors.

Should I wait for the rule change before applying?

Not necessarily. That depends on your current position, timeline and whether the proposed change is likely to materially improve your borrowing capacity. In many cases, preparing your documents, reducing debts and understanding lender options now is the better first move.

What this means for you

If you’re planning to buy or refinance in 2027 and want to understand how this proposed APRA change could affect your borrowing power, Derwent Finance can help you work through the numbers and options. You can start with a calculator, or book a strategy session for tailored guidance based on your situation. Book a complimentary strategy session.

Sources / Further Reading

• RBA Media Release - Monetary Policy Decision
• APRA releases discussion paper on mortgage serviceability buffer settings
• CoreLogic Hedonic Home Value Index: September 2026
• ABS Lending Indicators, Australia - July 2026
• NAB Economics: APRA Buffer Review - What it means for borrowers
• ABS Consumer Price Index, Australia - June Quarter 2026
• Home Energy Advantage Scheme - Department of Climate Change, Energy, the Environment and Water

This article contains general information only and does not take into account your personal objectives, financial situation or needs. It is not personal financial or credit advice. Eligibility, rates, lender policies and government schemes change and depend on individual circumstances and lender criteria — no loan approval or savings outcome is guaranteed. Speak with a licensed mortgage broker before making decisions.