The amount you can borrow for your first home is not determined by your salary alone. A lender usually works from your usable income, living expenses, existing debts, credit limits, dependants, loan term and its own assessment rules. Your deposit then determines what purchase price that loan can support.
That means a first home buyer can face three different numbers:
- The lender maximum: the largest loan a lender may approve under its policy.
- The deposit-supported price: the property price your savings can cover after allowing for the deposit and purchase costs.
- Your comfortable budget: the repayment level that still leaves room for bills, home ownership costs, savings and the life you want to live.
Your practical buying range is normally controlled by the lowest of the three. Understanding that distinction is more useful than chasing a single online borrowing figure.
📑 Table of Contents
- Borrowing capacity is a repayment test, not an income multiple
- The three limits that shape your first-home budget
- What lenders actually assess
- Why lenders test your loan at a higher interest rate
- A second 2026 consideration: high debt-to-income lending limits
- A worked example: why the three numbers may not match
- Five ways to get a more reliable borrowing estimate
- Borrowing estimate, pre-approval and final approval are different
- Questions first home buyers often ask
- Start with a buying range, not a single maximum
- Sources and further reading
Borrowing capacity is a repayment test, not an income multiple
You may hear rules of thumb such as “four times your income” or “six times your income”. They can provide rough context, but they are not how a lender reaches a final decision.
A lender estimates how much income remains after tax, living expenses and existing financial commitments. It then tests whether that surplus can cover the proposed mortgage repayments under its assessment assumptions. The calculation may also include a minimum surplus or other buffers.
This is why two people earning the same salary can have very different borrowing capacities. One may have no dependants, no consumer debt and stable base income. The other may have childcare costs, a car loan, a large credit-card limit and income that relies on irregular overtime.
It is also why two lenders can produce different answers for the same person. Each lender can have different policies for accepted income, expense benchmarks, loan terms, existing debts and risk.
The three limits that shape your first-home budget
1. The amount a lender may be willing to lend
This is what most borrowing-power calculators try to estimate. The lender considers whether your verified income can support the proposed debt after allowing for expenses and commitments.
The result is lender-specific. A figure from one calculator is not a market-wide entitlement, and it is not approval. Supporting documents, a credit assessment and the property valuation still matter.
2. The property price your deposit can support
Borrowing capacity and deposit capacity solve different problems. You might be able to service a $650,000 loan but not yet have enough cash to complete the purchase. Alternatively, you may have a strong deposit but insufficient assessed income for the loan required.
Your available cash may need to cover more than the deposit. Depending on the purchase and your eligibility, it can also be needed for transfer duty, conveyancing, inspections, loan costs and a buffer after settlement. Our guide to how much money you need to buy your first home explains these amounts separately.
The lender will also consider the loan-to-value ratio, or LVR. This compares the loan with the lender’s accepted property value. A smaller deposit may mean lenders mortgage insurance, a government-supported pathway or additional lender conditions. A low-deposit option can help with the cash hurdle, but it does not make an unaffordable loan serviceable.
3. The amount you would be comfortable repaying
A lender assesses credit risk. You need to assess your life after settlement.
Your personal budget may need to leave room for council rates, strata levies where relevant, insurance, maintenance, utilities, travel, future family plans and emergency savings. Some of these costs replace expenses you already pay as a renter; others are genuinely new.
A lender maximum can therefore be higher than the amount you should choose to borrow. Your goal is not necessarily the biggest approval. It is a loan that lets you own the home without making the rest of your budget unworkable.
What lenders actually assess
Your income—and how reliable the lender considers it
Lenders usually start with income, but they may not count every dollar in the same way. Base salary is generally straightforward when it can be verified. Overtime, bonuses, commission, casual earnings, allowances, government benefits and second-job income may require a history and may be reduced or excluded under a lender’s policy.
APRA’s residential mortgage guidance says prudent banks should adjust temporarily high, seasonal or variable income. It notes that discounts are commonly applied to sources such as bonuses, overtime and variable commission. The relevant treatment depends on the lender and the evidence available.
For a first home buyer, this means gross annual income is only the beginning. The more important figure is the income a particular lender will accept for servicing.
Your actual living expenses
Expect a lender or broker to ask about spending across categories such as groceries, utilities, transport, insurance, subscriptions, recreation, education, childcare and medical costs.
APRA says banks should assess a borrower’s circumstances and should not use an expense benchmark as a substitute for reasonable enquiries. In practice, a lender may compare declared spending with a benchmark and use an adjusted figure where required by its policy.
Before estimating your range, review several months of transactions rather than guessing. An honest budget makes the borrowing estimate more reliable and helps reveal whether the resulting repayment would be comfortable.
Credit cards, personal loans and other commitments
Existing repayments reduce the income available for a mortgage. This can include car finance, personal loans, buy now pay later facilities, child support, existing mortgages and other continuing commitments.
Credit cards deserve special attention. A lender may assess the approved limit, not merely the current balance. A card with nothing owing can therefore still reduce borrowing capacity because the limit remains available to use.
Closing or reducing a facility can help in some cases, but do not make changes blindly. The improvement varies by lender and your overall application, and a closed account may take time to update in supporting records.
HELP and other study or training debt
HELP debt is not treated like a normal loan with a fixed monthly repayment, but compulsory repayments reduce the income available for mortgage servicing once the relevant threshold applies.
For the 2025–26 income year, the Australian Taxation Office says compulsory study-loan repayments use marginal rates and begin when repayment income exceeds $67,000. Thresholds and rates change over time, and lenders may update their assessment methods accordingly.
The balance itself can still be relevant, particularly if it is close to being repaid. Whether paying it out before applying produces a worthwhile improvement depends on the balance, your cash position, the lender’s method and what else you could do with the money.
Dependants and household structure
A single applicant, a couple, and a household with dependants can have different assessed expenses even at the same combined income. Childcare, school costs and other continuing commitments may also be considered separately.
Planned changes matter too. If parental leave, reduced hours or another foreseeable income change is approaching, a realistic budget should account for it even if a simple calculator does not.
Your credit history and recent applications
A borrowing estimate is not a credit decision. Lenders also review your credit report, repayment history and application conduct.
The Office of the Australian Information Commissioner explains that credit applications create enquiries on your credit report and that you can obtain a free consumer credit report every three months. Checking early gives you time to identify an error or understand an issue before a formal application.
The loan term and your stage of life
A longer loan term usually produces a lower assessed monthly repayment than a shorter term, which can increase the calculated capacity. It can also increase the total interest paid if the loan remains outstanding for longer.
The available term may be influenced by age, expected retirement timing and the lender’s exit-strategy requirements. The right comparison therefore includes both today’s capacity and the long-term cost.
Why lenders test your loan at a higher interest rate
A lender does not generally assess your proposed loan only at the rate advertised today. Under APRA’s current standard, an APRA-regulated bank must apply a serviceability buffer of at least 3 percentage points above the loan rate, unless APRA determines otherwise. A lender may also have its own assessment floor or other policy settings.
For illustration, a loan priced at 6% could be tested at 9% under a 3-percentage-point buffer. That does not mean 9% is the rate you will pay. It means the lender is testing whether the application has room to cope with higher repayments or other financial shocks.
The buffer is one reason your “I can afford this repayment today” calculation may be higher than the lender’s borrowing result.
A second 2026 consideration: high debt-to-income lending limits
From 1 February 2026, APRA limits each authorised deposit-taking institution to having no more than 20% of new owner-occupied lending at a debt-to-income ratio of six times or more. A separate 20% limit applies to investment lending.
This is a lender portfolio limit, not a universal rule that every application at six times income must be declined. It does, however, mean lender appetite can matter when an application sits in the high-DTI range. Some types of newly erected dwelling finance and construction finance are exempt from APRA’s limit, subject to the definitions and a lender’s implementation.
Do not use six times income as a promise or a hard personal cap. Serviceability, deposit strength, credit policy and the lender’s current portfolio position still need to align.
A worked example: why the three numbers may not match
Consider a hypothetical first home buyer with the following position:
- $95,000 gross annual salary
- $85,000 in total savings
- a $15,000 credit-card limit with no balance owing
- a car loan with $550 monthly repayments
- no dependants
A calculator may produce an initial loan estimate, but three separate constraints still need to be tested:
| Question | What could affect the answer? |
|---|---|
| What will a lender offer? | Accepted income, assessed expenses, the car loan, the full credit-card limit, assessment rate and credit policy. |
| What property price can the savings support? | Deposit size, transfer duty or concessions, purchase costs, LVR and whether cash is retained after settlement. |
| What repayment feels sustainable? | Actual lifestyle spending, future plans, ownership costs and the desired emergency buffer. |
Reducing the card limit or clearing the car loan may improve serviceability. But using most of the savings to clear debt could also weaken the deposit and cash buffer. The right move cannot be decided from borrowing capacity alone; the options need to be modelled together.
Five ways to get a more reliable borrowing estimate
- Separate your savings into deposit, purchase costs and post-settlement buffer. Do not assume every dollar can become the deposit.
- Review real spending. Categorise several months of transactions and include annual or irregular costs.
- List every debt and limit. Record balances, repayments and approved limits, including facilities you rarely use.
- Gather evidence for every income source. Payslips, employment details and a history of variable income can change what is accepted.
- Compare at least two repayment scenarios. Model the lender maximum and a lower, more comfortable loan amount at more than one interest rate.
You can use Falcon’s home loan calculators to test loan sizes, rates and repayments. Treat the result as a planning tool rather than approval.
Borrowing estimate, pre-approval and final approval are different
A borrowing estimate is an early calculation based on the information supplied. Pre-approval generally involves a lender reviewing more detail and indicating a conditional amount for a limited period. Final approval usually requires the full application conditions to be satisfied, including an acceptable property and valuation.
Your position can also change between stages. New debt, a changed job, increased credit limits, missed repayments or a change in spending can affect the outcome. Avoid treating pre-approval as permission to bid beyond your comfortable budget.
Falcon’s broader borrowing-capacity guide explains how to prepare before an application. First home buyers can also review the full first-home buying pathway before choosing a target price.
Questions first home buyers often ask
Does a bigger deposit increase borrowing capacity?
A bigger deposit reduces the loan required and can improve the LVR and lender options. It does not necessarily increase the maximum loan your income can service. Deposit capacity and repayment capacity are related but separate tests.
Can I borrow more with a partner?
A second income can increase capacity, but the lender also includes the second applicant’s debts, expenses, dependants and credit profile. The result depends on the combined position, not simply two salaries added together.
Will cancelling a credit card increase how much I can borrow?
It may, because lenders often assess the limit rather than the balance. The effect varies, so compare the result before cancelling a useful facility and allow time to document the change.
Why is a bank calculator different from my pre-approval?
A public calculator uses simplified assumptions. A lender assessment can use verified income, actual and benchmark expenses, debt details, credit policy, assessment rates and information not captured by the calculator.
Should I borrow the maximum amount offered?
Not automatically. Compare the maximum with your preferred lifestyle, likely ownership costs, future plans and capacity to manage higher repayments. A smaller loan can preserve flexibility even when a larger amount is technically available.
Start with a buying range, not a single maximum
The most useful first-home borrowing answer is usually a range with clear assumptions. It should show what a lender may offer, what your deposit can support and what feels sustainable after the keys are handed over.
Speak with Prasanth at Falcon Lending Solutions to review your income, expenses, debts and deposit across relevant lender policies. The aim is not only to calculate a maximum, but to understand a realistic property range and the steps that could strengthen your position before you make an offer.
General information only. This article does not take into account your objectives, financial situation or needs. Credit approval, lending criteria, fees and conditions apply. Government rules, tax settings and lender policies can change.