If you’ve typed “how much can I borrow for a home loan” into Google at 11pm with a coffee going cold beside you, you’re not alone. It’s the question almost every Geelong buyer asks before they’ve even started looking at properties, and it’s usually followed by a quieter second question: will an online calculator actually tell me the truth?
The honest answer is no, not on its own. A calculator gives you a rough number based on a handful of inputs. Your real borrowing capacity depends on a lot more than that, and it can genuinely differ by tens of thousands of dollars between one lender and the next. This guide walks through what borrowing capacity actually means, the factors that shape it, and what you can do right now to strengthen yours before you apply.
What Does “Borrowing Capacity” Actually Mean?
Borrowing capacity is the maximum amount a lender is willing to offer you, based on an assessment of your income, your expenses, your existing debts, and the size of your deposit. It’s not a fixed figure that follows you around. It’s calculated fresh by each lender, using their own internal model, which is exactly why two people with identical incomes can walk away with two very different numbers.
This trips a lot of people up, because there’s a common assumption that borrowing capacity is some kind of universal truth about your finances. It isn’t. It’s a policy outcome. One lender might weigh your overtime generously; another might discount it almost entirely. One might treat your car loan as a minor commitment; another might knock tens of thousands off your capacity because of it.
Borrowing capacity vs pre-approval: the key difference
These two terms get used interchangeably, and that’s part of the confusion. Borrowing capacity is what you could borrow across the market, in theory, once your situation is properly assessed. Pre-approval is what one specific lender has conditionally agreed to lend you, for a specific loan product, at a specific point in time.
Think of it as two separate steps. First, work out the real picture of what’s achievable, and which lenders will treat your situation most favourably. Then apply to the one that gives you the strongest result, and that application becomes your pre-approval. Skipping straight to pre-approval with your existing bank, without comparing what else is out there, is how a lot of Geelong buyers end up with a smaller budget than they actually have. (We’ve written a separate guide on pre-approval if you want the full breakdown of that next step.)
The 6 Factors Lenders Use to Assess How Much You Can Borrow
Every lender looks at broadly the same six things, even if they weight them differently.
1. Income, and what counts
PAYG salary is the simplest to assess. Rental income, investment income, trust distributions, and business income are all treated differently, and often more conservatively than you’d expect. If you’re self-employed, most lenders will average your income over the last two tax returns, which can undervalue a business that’s grown recently.
2. Living expenses and regular commitments
Lenders apply something called the Household Expenditure Measure, or HEM, as a minimum benchmark for living costs. But they’ll also look at your actual bank statements, and everyday spending adds up faster than most people expect. Streaming subscriptions, gym memberships, school fees, and HECS debt all reduce the income they consider available for loan repayments.
3. Existing debts and credit limits
This one catches people out constantly. A credit card limit reduces your borrowing capacity even if you pay it off in full every month, because lenders assess the limit, not your balance. A $20,000 limit sitting mostly unused can still cost you a meaningful chunk of borrowing power. Personal loans, car loans, and any existing mortgage are all counted as ongoing commitments too.
4. Deposit and LVR
A bigger deposit reduces the amount you need to borrow, which naturally increases what’s achievable, and it can unlock better lender options. Borrowing at 80% of the property’s value or below generally means avoiding Lenders Mortgage Insurance (LMI), an extra cost that applies when your deposit is smaller.
5. Number of dependants
Lenders apply a fixed expense allowance for each dependant in your household, and this comes straight off your assessed disposable income. Two otherwise identical applicants with a different number of kids will get different outcomes.
6. The property itself
Property type, location, and how you intend to use it (living in it versus renting it out) all affect what a lender will offer against it. Some postcodes and property types are assessed more conservatively than others, which is worth knowing before you fall in love with a particular street.
Indicative Borrowing Ranges for Geelong Buyers
To put some rough numbers around this: a single applicant on around $80,000 might typically be looking at a borrowing range somewhere between $400,000 and $500,000, while a household on a combined $160,000 might be looking at something closer to $750,000 to $950,000.
These are illustrative examples only, not a promise or a formula you can rely on. Your actual figure depends on every factor above, and it will move depending on which lender assesses you. For context, established homes in growth suburbs like Armstrong Creek, Mount Duneed and Torquay are commonly sitting somewhere in the $600,000 to $900,000-plus range, which is worth keeping in mind as a reality check while you’re getting your own numbers sorted. *(Suggested check before publishing: confirm these figures against current median price data for each suburb.)*
Why Borrowing Capacity Varies Significantly Between Lenders
This is worth repeating, because it’s the single most misunderstood part of the process: the same applicant, with the same documents, can have their borrowing capacity vary by $100,000 or more depending on which lender assesses them. It’s not a trick or a sales pitch. Each lender applies its own policy weightings to income types, expense benchmarks, and existing debt.
This is exactly why going directly to your everyday bank and accepting whatever figure they quote can leave real money on the table. A broker with access to a wide panel of lenders isn’t just shopping around for a lower rate. They’re identifying which lender’s policy actually suits how your income and expenses are structured, which can be the difference between a “sorry, not quite” and a genuine yes.
How to Improve Your Borrowing Capacity Before Applying
There are things you can do in the weeks before you apply, and things that take a little longer to pay off.
Actions to take before your application
Pay down or close credit cards you don’t use. It’s the limit that counts against you, not the balance, so a card sitting at zero with a $15,000 limit is still working against you. Cancel buy-now-pay-later accounts and any subscriptions you’ve forgotten you’re paying for, particularly in the three to six months before you apply. And try to avoid taking on new debt, including car loans or personal loans, in the lead-up to a home loan application.
Longer-term actions
Build a consistent savings pattern. Lenders like to see genuine savings held over at least three months, showing a habit rather than a one-off deposit from a relative. If you’re self-employed, talk to your accountant well ahead of time about how your most recent tax return reflects your income position, since that document carries a lot of weight in how a lender sees you.
How a Mortgage Broker Finds You More Borrowing Power
This is where a broker earns their keep. Rather than assessing your situation against one lender’s policy, a broker checks it against dozens simultaneously, looking for which one will give you the strongest result for your specific income structure, your existing debts, and your deposit.
This matters most for self-employed borrowers, dual-income households with complicated income streams, professionals eligible for specialist loan products, and anyone carrying existing debt that a standard bank might weigh too heavily. And genuinely, it costs you nothing. Brokers are paid by the lender when your loan settles, not by you, so there’s little reason not to get a second opinion on what you can actually achieve.
Frequently Asked Questions
Does a mortgage calculator give me an accurate borrowing figure?
Not really. Online calculators use simplified assumptions and can’t account for the details that actually move the needle, like your income structure, your existing debts, or which lenders will treat your situation most favourably. Use one for a rough starting point only.
Can my borrowing capacity really change between lenders?
Yes, and often significantly. The same applicant can be assessed very differently by two lenders because each applies its own policy around income, expenses, and debt. This is one of the main reasons brokers compare across a wide lender panel rather than relying on a single institution.
Will checking my borrowing capacity affect my credit score?
A general conversation about your borrowing capacity, without submitting a formal application, typically doesn’t involve a credit check. A credit enquiry usually only occurs once you apply for pre-approval with a specific lender.
Next Steps
The only way to know your exact borrowing capacity, rather than an estimate, is a direct assessment based on your real numbers. Our calculator is a reasonable starting point if you want a rough figure to play with, but it can’t account for the details that actually move the needle.
If you’re ready for a proper answer rather than an estimate, book a free 15-minute call with Paddy. No paperwork required for that first conversation, just an honest look at your actual numbers and a clear picture of what’s realistically possible for you in Geelong right now.