How to Increase Your Borrowing Capacity in 2026: What Actually Moves the Number

Megan Birot, Content Editor, OurTop10Last reviewed September 2026 by Megan Birot, Content Editor, OurTop10. Figures checked against the sources named in the article.
Part of our complete first home buyer guide, which walks the whole journey from saving the deposit through to settlement day.

Borrowing capacity is the most a lender will let you borrow, and in 2026 it is almost always smaller than people expect. The reason is one rule: APRA requires every lender to test whether you could still afford the loan at 3 percentage points above the rate you will actually pay. With the cash rate at 4.35% and variable rates sitting around 6%, that means you are being assessed at roughly 9%.

You cannot change that rule. You can change most of the other inputs, and some of them move the number by more than a pay rise would. This guide goes through them in the order they usually matter.

Calculator and notepad used to work out home loan borrowing capacity
OurTop10 data: Our Q2 2026 Default Loan Report found at-risk households rose 18% in a single quarter, with Sydney the fastest-growing market. Lenders read the same data, which is why the 3% buffer is not going anywhere. Read the report.

How a lender actually works out the number

Every lender runs the same basic sum, with its own settings. It takes your income, trims the parts it does not fully trust, subtracts your living expenses and the repayments on every debt you already have, and then asks how big a loan the remainder could service at the assessment rate. The settings are where lenders differ, and where a broker earns their keep.

  • Income. Base salary counts in full. Overtime, bonuses, commission and rental income are usually shaded, often to 80%, and casual income may need six to twelve months of history before it counts at all.
  • Debts. Car loans, personal loans, buy-now-pay-later accounts, HELP repayments and credit card limits.
  • Living expenses. The higher of what your statements show and a benchmark figure for a household your size in your postcode.
  • The buffer. The 3 percentage point stress test APRA reconfirmed in May 2026.

Our borrowing power calculator runs a simplified version of this so you can see which inputs move the result most for you.

Borrowing capacity estimator

A quick version of the sum lenders run: income in, expenses and debts out, tested at 3 percentage points above the rate. Change one input at a time to see what moves the number most.

Built by OurTop10. Results are estimates for comparison only and are not credit advice. Figures stay in your browser and are not sent anywhere.

The changes that move the number most

1. Close the credit cards you do not use

This is the one that surprises people. A lender does not care what you owe on a card. It assesses the limit, as though you had spent every dollar of it, and counts a monthly repayment against you of around 3% of that limit. A $15,000 limit you never touch is treated like a $450-a-month commitment, which at today’s assessment rate is tens of thousands of dollars off what you can borrow. Reduce the limit or close the card, and do it before you apply, because the lender reads the limit on the day it assesses the file.

2. Clear the small debts

A $20,000 car loan at $500 a month costs you far more in borrowing power than the balance suggests, because the lender treats that $500 as money you cannot put towards a mortgage. If you have the savings to pay it out and still keep your deposit intact, the sum usually favours paying it out. Buy-now-pay-later accounts count too, even with a zero balance, and lenders can see them on your statements.

3. Deal with the HELP debt

A HELP repayment comes out of your pay before you see it, and lenders deduct it from your income. Since 2025 lenders have been able to disregard a HELP debt that will be paid off within the next twelve months, so if yours is close to finished, say so and show the balance. If it is not close, it stays in the calculation and there is little to be done about it beyond knowing the effect.

4. Fix the statements three months out

Lenders read three months of transactions and compare your actual spending to their benchmark. If your spending is higher, they use your figure. Regular gambling transactions, frequent overdrawn days, a dozen subscriptions and daily food delivery all get counted. Three clean months before you apply is the cheapest improvement on this list.

5. Pick the lender that reads your income kindly

This is the part most people never see. One lender counts 80% of your overtime, another counts all of it if you have two years of history. One accepts a year of self-employed tax returns, another wants two. One deducts the full credit card limit, another lets you nominate a card to close at settlement. On the same file, the highest and lowest offers from a lender panel are commonly $100,000 or more apart, and the only way to find the top of that range is to test the scenario across the panel before applying. That is what a mortgage broker does, and it is the reason four out of five new home loans in Australia now go through one.

Mortgage broker going through a borrowing capacity assessment with a client
Emmanuel Guignard, Director and Principal Mortgage Broker at Loanscope

“The first thing I do on a new file is pull the credit card limits and the car loan, because those two are usually worth more than everything else on the list combined. I have had clients add $80,000 to their borrowing power in a fortnight by closing two cards they had forgotten about. Nobody had ever told them the limit was the problem, not the balance.”

Emmanuel Guignard

Director and Principal Mortgage Broker, Loanscope

The changes that help, but less than you would think

Earning more. Obviously it helps, but a $10,000 pay rise adds far less than $10,000 a year to your serviceable income once tax and the assessment rate are applied. It is also the slowest lever. Ask for it anyway.

A longer loan term. A 30-year term is standard. Stretching to a longer one lowers the monthly repayment and lifts the figure slightly, at the cost of years of extra interest. Most first home buyers are better off keeping 30 years and cutting a debt instead.

A bigger deposit. It does not change how much the lender thinks you can repay, but it lowers the loan you need, removes lenders mortgage insurance at 20%, and opens up the sharpest rates. If you are under 20%, the 5% deposit scheme does the same job on the insurance without the extra years of saving.

A basic loan. A loan with no offset account and no package fee is sometimes assessed a little more generously because the ongoing fees are lower. The difference is small, and giving up an offset to get it is usually the wrong trade.

Borrowing with someone else

Two incomes on one application is the single biggest jump available, and it comes with the biggest obligation: each borrower is liable for the whole loan, not half of it. If one stops paying, the other pays.

A guarantor is different. A parent offers part of their own home as extra security, which removes the insurance premium and can lift the amount, but their income is not counted and their property is on the line. Both arrangements deserve independent legal advice before anyone signs.

What not to do in the three months before you apply

  • Do not open a new card, a new buy-now-pay-later account or a new car loan
  • Do not change jobs if you can avoid it; most lenders want you past probation
  • Do not apply to several lenders at once, because every application leaves an enquiry on your credit file
  • Do not move large sums between accounts without a paper trail, and do not let a gifted deposit land unexplained
Couple reviewing their finances before applying for a home loan

What to do next

Run your own figures through the borrowing power calculator, then read our guide to home loan pre-approval, because the assessed figure from a lender is the only one that counts at an auction. If you want the scenario tested across a lender panel, our ranked broker lists for Sydney and Melbourne are a place to start, and the best home loans for first home buyers guide covers what to look for once you know your ceiling.

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FAQs for How to Increase Borrowing Capacity

The maximum a lender will let you borrow, worked out from your income after tax, minus your living expenses and existing debt repayments, tested at 3 percentage points above the actual rate. Every lender runs the same sum with slightly different settings.

Credit card limits and car loans. A lender assesses a card at its full limit whether you use it or not, and a $500-a-month car repayment is treated as $500 you cannot put towards a mortgage. Closing an unused card is usually the fastest fix.

Less than the internet suggests. Lenders read the file for defaults, missed payments and a cluster of recent enquiries. A clean twelve months counts for more than a perfect score, and a default narrows your lender options rather than ending the process.

Slightly. A longer term lowers the monthly repayment, which lifts the assessed amount, but you pay interest for more years. Most first home buyers get a bigger lift from clearing a small debt and keeping a 30-year term.

No. It reduces how much you need to borrow. At 20% it removes lenders mortgage insurance and opens up the sharpest rates, and the 5% deposit scheme does the insurance part without the extra saving.

Because each one sets its own rules on how much overtime, bonus, casual and rental income to count, how it treats credit card limits and HELP debt, and which living expense benchmark it uses. On the same file the gap between the highest and lowest offer on a panel is commonly $100,000 or more.

Megan Birot, Content Editor at OurTop10

Megan Birot

Content Editor, OurTop10

Megan Birot is OurTop10’s Content Editor. She holds a Certificate IV in Finance and Mortgage Broking (FNS40821) and checks every guide on the site against current lender policy, government scheme rules and state revenue office thresholds before it goes live.

She also runs the editorial reviews on OurTop10’s broker, accountant, conveyancer and buyer’s agent shortlists, and writes the media releases for its quarterly mortgage stress research.

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