Home Loan Basics for First-Time Borrowers: Deposits, Rates, Repayments, and Approval
Key Takeaways
A 20% deposit avoids Lenders Mortgage Insurance and often earns sharper rates, but you can buy with less using LMI, a guarantor, or the Australian Government 5% Deposit Scheme.
Compare loans on the comparison rate and features, not the headline rate, and weigh fixed, variable, and split structures against your need for certainty.
Lenders assess far more than your deposit: income, expenses, debts, credit card limits and genuine savings, all tested against a serviceability buffer.
Pre-approval is conditional, not a guarantee, so check your borrowing capacity and tidy your finances before house hunting.
Buying your first home is one of the largest financial decisions you will make, and the lending side can feel like a wall of jargon at exactly the moment the stakes are highest. With property prices, interest rates, and deposit requirements all shaping what you can afford, understanding the basics early puts you in a far stronger position than learning them on the fly during a purchase.
The reassuring part is that a home loan is built from a handful of core ideas: your deposit, your interest rate, your repayments, and how a lender decides to approve you. Once those click into place, the rest of the process becomes far less daunting, and you can make decisions with confidence rather than guesswork.
This article walks through each of those building blocks in plain terms, explains how lenders actually assess a first home loan, sets out the costs and mistakes to watch for, and gives you a clear sense of what to do first.
What is a home loan?
At its simplest, a home loan is money a lender advances you to buy a property, secured against that property until you repay it. Understanding that the security relationship is the key to everything that follows.
Because the loan is secured against the home, the lender can take possession if you cannot repay, which is why they assess your application so carefully and why your deposit matters. You repay the loan over a set term, commonly up to 30 years, in regular repayments made up of principal, the amount you borrowed, and interest, the cost of borrowing it. The size of your deposit, your interest rate and your repayment structure all flow from this basic arrangement.
How much deposit do you need?
Your deposit is the amount you contribute upfront, and it shapes both how much you borrow and what your loan costs. The common guidance is 20%, but the reality has more options than that, especially for first-home buyers right now.
A 20% deposit
A 20% deposit is the traditional benchmark because it brings your loan-to-value ratio (LVR), the size of your loan as a percentage of the property value, down to 80%. On a $500,000 property, that is a $100,000 deposit. Reaching 20% means you generally avoid Lenders Mortgage Insurance and often access sharper interest rates, since you represent lower risk to the lender.
Low-deposit loans and LMI
Many first home buyers purchase with less than 20%, sometimes as little as 5% or 10%. The trade-off is Lenders Mortgage Insurance (LMI), a one-off premium that protects the lender, not you, if you cannot meet repayments. LMI is non-refundable and non-transferable between lenders, and it can run to thousands or tens of thousands of dollars, depending on your loan size and deposit. On a $500,000 property, a 12% deposit with LMI gets you in sooner than waiting to save 20%, but at an added cost worth weighing.
The Australian Government 5% Deposit Scheme
A significant option for first home buyers is the Australian Government 5% Deposit Scheme, under which the government acts as guarantor so eligible buyers can purchase with as little as a 5% deposit, or 2% for eligible single parents and legal guardians, without paying LMI. From 1 October 2025 the scheme removed income caps and waitlists and increased property price caps, with unlimited places available. You still need to meet eligibility rules, buy within the property price cap for your area, and satisfy the lender's credit and serviceability requirements, so it is worth checking the current details on the official First Home Buyers website and confirming your eligibility before relying on it.
Guarantor options
Another path is a guarantor home loan, where a family member, often a parent, uses equity in their own property as additional security. This can reduce your effective LVR and help you avoid LMI. For example, a family guarantee might bring an LVR from 90% down to 79%. It is a generous arrangement but a serious one, since the guarantor takes on real risk, so it deserves careful thought and ideally independent advice for everyone involved.
Understanding interest rates
Your interest rate determines what your loan costs over time, and there is more to compare than the headline number. The main choice is how the rate behaves, and how to read the true cost.
Variable rates
A variable rate can move up or down over time, usually in response to broader rate changes. The benefit is flexibility, often including features such as offset accounts and unlimited extra repayments. The trade-off is uncertainty: your repayments can rise if rates increase.
Fixed rates
A fixed rate locks your interest rate for a set period, commonly one to five years, giving you certainty over your repayments. The trade-off is less flexibility, potential break costs if you leave early, and the fact that you will not benefit if rates fall during the fixed term.
Split loans
A split loan divides your borrowing into part fixed and part variable, giving you some certainty and some flexibility at once. Many first home buyers find this a sensible middle ground when they are unsure which way rates will move.
Comparison rate
The comparison rate folds most fees into a single figure, giving you a truer picture of the loan's cost than the advertised rate alone. A low headline rate paired with high fees can cost more than a slightly higher rate with none, which is exactly why the comparison rate exists. Read the two together.
How repayments work
How you repay shapes both your monthly budget and the total cost of your loan. The structure and frequency are worth understanding before you commit.
Principal and interest versus interest-only
With principal and interest (P&I) repayments, each payment reduces both the interest and the loan balance, so you steadily build equity and pay the loan off. With interest-only repayments, you pay only the interest for a set period, which lowers repayments in the short term but means you make no progress on the balance and pay more over the life of the loan. For most owner-occupier first home buyers, P&I is the standard and usually the wiser choice.
Repayment frequency
You can usually repay weekly, fortnightly or monthly. Paying fortnightly rather than monthly can slightly reduce the interest you pay over time, because you effectively make a little extra each year, though the difference depends on how your lender calculates it.
Offset and redraw
An offset account is a transaction account linked to your loan, where the balance reduces the interest you are charged. A redraw facility lets you access extra repayments you have made. Both can save interest and add flexibility, and an offset in particular can be useful for a first home buyer building up savings while paying down the loan.
What lenders check before approval
Approval is not just about your deposit; lenders build a full picture of whether you can afford the loan reliably. Understanding what they assess helps you prepare and avoid surprises.
When you apply, a lender typically looks at:
Your income, and how stable and predictable it is.
Your living expenses and overall spending patterns.
Your existing debts, including credit card limits, car loans and any study debt under the Higher Education Loan Program (HELP).
Your credit history and recent repayment conduct.
The source of your deposit, including genuine savings built up over time.
The property itself, through a valuation.
A few of these deserve a closer look, because they catch first home buyers out. Lenders run a serviceability assessment to test affordability, and they apply a buffer required under guidance from the Australian Prudential Regulation Authority (APRA), currently an extra 3% on top of the actual rate, so you are assessed as though repayments were higher than they are today. They also apply income shading to less certain earnings, such as overtime and bonuses, often counting only around 80%, and casual or part-time income may be treated more cautiously. Credit card limits are assessed in full, not just your balance, so a high limit reduces your borrowing capacity even if you pay it off each month. Many lenders also want to see genuine savings, a deposit built up over time rather than gifted at the last minute, as evidence you can manage repayments.
Pre-approval versus formal approval
These two terms are easy to confuse, and the difference matters when you are making an offer. Pre-approval is an indication; formal approval is the real thing.
Pre-approval, sometimes called conditional approval or approval in principle, is the lender's early indication of how much they may lend you, based on the information you have provided. It helps you shop with confidence and make offers, but it is conditional and can still fall away. Formal approval, also called unconditional approval, comes once the lender has assessed the specific property, completed a valuation, and verified your full application. Because pre-approval is not a guarantee, it is wise to keep your finances steady between the two stages, avoiding new debts or job changes that could affect the final decision.
Upfront costs beyond the deposit
Your deposit is the highest upfront cost, but it is not the only one, and first home buyers often underestimate the extras. Budgeting for these avoids a nasty surprise close to settlement.
Beyond the deposit, plan for:
Stamp duty, also called transfer duty, though first home buyer concessions or exemptions may apply in your state.
Conveyancing or legal fees for handling the contract of sale and settlement.
Building and pest inspections before you commit.
Loan application, valuation or settlement fees, depending on the lender.
LMI, if your deposit is below 20% and you are not using a scheme or guarantor.
Moving costs, insurance and initial repairs once you take possession.
It is worth checking your state's first home buyer concessions, since stamp duty relief can make a meaningful difference to how much cash you need upfront.
Common first-home-buyer mistakes
A few avoidable mistakes trip up first home buyers regularly, and knowing them in advance is half the battle. Most come down to acting before checking.
House hunting before checking borrowing capacity, then falling for something out of reach.
Taking on a new car loan or credit card just before applying cuts borrowing power.
Treating pre-approval as a guarantee and skipping caution between approval stages.
Choosing a loan on headline rate alone, without weighing fees and features.
Underestimating upfront costs and being caught short before settlement.
Applying to several lenders at once leaves a cluster of credit enquiries.
Most of these are easy to sidestep with a little planning and the right advice early, well before you find a property you love.
Real borrower scenarios
It often helps to see how these basics play out in practice. The following scenarios are illustrative, but they reflect the situations first home buyers commonly face.
Single applicant on one income
A single buyer on one income has a solid deposit but limited borrowing capacity, since one income must cover the buffer repayments. Keeping debts low and credit card limits modest helps maximise what they can borrow, and a scheme place may reduce the deposit hurdle.
Couple with a car loan
A couple have a healthy combined income but are carrying a car loan. The repayment reduces their serviceability, so they may borrow less than they expect. Paying the loan down, or factoring it into their budget, gives them a clearer picture before they start looking.
Buyer using a guarantor
A first home buyer with a small deposit uses a parent's equity as a guarantee, lowering their effective LVR and avoiding LMI. It opens the door sooner, but both parties take the commitment seriously and seek advice, since the guarantor's property is on the line.
Buyer with casual or variable income
A buyer on casual or part-time income finds that lenders treat that income more cautiously. A longer, consistent work history helps, and the right lender choice matters, since policies on casual income differ noticeably between lenders.
Buyer using the 5% Deposit Scheme
A first home buyer uses the Australian Government 5% Deposit Scheme to purchase with a 5% deposit and no LMI. It gets them in sooner, but they remain mindful that a smaller deposit means a larger loan and higher repayments, so the budget still needs to comfortably absorb the cost.
A first-home-buyer checklist
Working through a few steps in order makes the whole process calmer and your application stronger. This is a sensible sequence to follow before you start making offers.
Check your borrowing capacity before you start looking at properties.
Review your credit report and tidy up any issues or unnecessary card limits.
Build and document your deposit, including genuine savings.
Research first home buyer schemes, grants and stamp duty concessions you may qualify for.
Compare loans on rate, comparison rate, fees and features, not rate alone.
Get pre-approval before making an offer.
Budget for upfront costs beyond the deposit.
Line up a conveyancer and arrange inspections before you commit.
With these in hand, you move from hoping things work out to knowing where you stand, which is exactly where a first home buyer wants to be.
If you have started checking your borrowing capacity, deposit options or loan features, it can help to speak with a broker before choosing a lender or applying. A mortgage broker in Albury & Wodonga can help first-time borrowers compare suitable loans, understand deposit pathways and prepare a stronger application based on their income, savings and goals.
How a broker can help a first-home buyer
Because lenders differ so much in how they assess income, deposits and debts, much of the value for a first home buyer lies in choosing the right lender, and that is where a broker can help. The best fit is rarely obvious from advertising alone.
A broker can check your borrowing capacity before you start looking, explain which schemes and structures you qualify for, and match you to a lender whose policy suits your situation, whether you have casual income, a modest deposit or a guarantor. They can also help you avoid unnecessary credit enquiries and prepare a clean, well-documented application, so you are more likely to be approved the first time. The aim is to take the guesswork out of your first purchase and help you start with the right loan rather than simply the first one offered.
Frequently Asked Questions (FAQs)
How much deposit do I need for my first home?
A 20% deposit is the traditional benchmark because it brings your loan-to-value ratio to 80% and helps you avoid Lenders Mortgage Insurance. That said, many first home buyers purchase with less, sometimes as little as 5%, using LMI, a guarantor or the Australian Government 5% Deposit Scheme. The right deposit for you depends on your savings, your borrowing capacity, and how the added costs of a smaller deposit fit your budget.
Can I buy with less than a 20% deposit, and will I pay LMI?
Yes, you can buy with less than 20%, but doing so usually means paying Lenders Mortgage Insurance, a one-off premium that protects the lender if you cannot repay. You may be able to avoid LMI through the 5% Deposit Scheme or a guarantor arrangement. LMI is non-refundable and non-transferable between lenders, so it is worth weighing the cost against the benefit of buying sooner.
What is the difference between the interest rate and the comparison rate?
The interest rate is the cost of borrowing shown as a percentage, while the comparison rate folds in most fees to give a truer picture of the loan's overall cost. A low advertised rate paired with high fees can end up costing more than a slightly higher rate with none, so it is best to read the two together rather than judging a loan on the headline rate alone.
Should I choose a fixed, variable or split loan?
It depends on how much certainty you want. A fixed rate locks your repayments for a set period but offers less flexibility and possible break costs; a variable rate can move up or down but often has more features; a split loan gives you some of each. There is no universally right answer, so the choice comes down to your budget, your need for certainty and your view on where rates may head.
Does pre-approval guarantee I will get the loan?
No. Pre-approval is the lender's early indication of how much they may lend, based on the information you have given, and it helps you shop and make offers with confidence. Formal approval comes only after the lender assesses the specific property, completes a valuation, and verifies your full application. Because pre-approval is conditional, keep your finances steady between the two stages to avoid jeopardising the final decision.
Do credit cards reduce my borrowing power?
Yes, often more than people expect. Lenders assess your credit card on its limit, not the balance you carry, so a high limit is treated as debt you could draw and must be able to service, even if you clear it each month. Reducing or closing cards you do not need is one of the more effective ways to lift your borrowing capacity before applying.
Can casual, part-time or self-employed income be used?
Yes, though lenders treat these income types more cautiously than a steady full-time salary. A consistent work history helps for casual and part-time income, while self-employed borrowers generally need clear financials covering a reasonable period. Because lender policies on these income types differ noticeably, the right lender choice can make a real difference to your outcome.
The Bottom Line
A first home loan comes down to a few core building blocks: your deposit and how it affects your costs, the interest rate and structure you choose, how your repayments work, and how a lender assesses your ability to repay. Understanding these early lets you make decisions with confidence rather than scrambling to learn them mid-purchase.
The most useful first step is to check your borrowing capacity and tidy up your finances before you start house hunting, then compare loans on their full cost and features rather than the headline rate. Approached this way, with the right preparation and advice, buying your first home becomes a clear, manageable process rather than an overwhelming one.