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MortgageSMART™by Emanate Finance
MortgageSMART™ tool
Home Loan Deposit Calculator
General information only — illustrative modelling, not credit assistance or an offer of finance. Actual outcomes depend on your circumstances, lender policy, rates and fees.
A 5% deposit and a 20% deposit buy the same house very differently.
This house deposit calculator works out the full cash position on an Australian purchase. The deposit decides your LVR, whether lenders mortgage insurance applies, how large the loan ends up, and often what rate you're offered. On top of that sits a pile of cash costs — stamp duty, conveyancing, inspections, government fees, settlement adjustments — that usually can't be borrowed.
Set your price, state and property type below and see your full funding position: deposit, duty after any concession, grants you may be eligible for, every purchase cost, whether your savings cover it — and roughly what price your savings could support.
Free calculator · No personal details required · About 60 seconds
Your funding position
Deposit, duty, concessions, grants and every upfront cost in one place — because the deposit percentage on its own never tells you whether you're ready.
Your buying position
- Savings available
- $90,000
- Estimated buying costs
- −$34,691
Duty payable plus conveyancing, inspections, government fees, lender costs and settlement adjustments.
Estimated shortfall
$19,691
On the figures entered, the cash required is more than your savings and any grant. The options below change that number.
Total funds required: $109,691 — deposit $75,000 plus buying costs $34,691. 90% LVR before any premium is added to the loan.
Estimated buying costs
$34,691
- Transfer (stamp) duty payable
- $29,741
- Registration & government fees
- $500
- Settlement & conveyancing
- $1,800
- Building & pest inspection
- $700
- Lender costs
- $800
- Council & water adjustments
- $1,150
These costs generally can't be added to the loan. Quotes from your conveyancer, inspector and lender will differ, and settlement adjustments depend on what the seller has prepaid.
Government costs — Western Australia
Duty at the general rate
$29,741
Concession applied
None
Duty payable
$29,741
- General rate — no first home concession applied
- —
- Registration & government fees
- $500
- No first home owner grant applied
- —
Potential figures based on your answers. This is not a determination of eligibility — that sits with the revenue office and your lender.
Grant and duty data last checked 16 August 2026. Grants, duty thresholds and scheme eligibility change regularly and differ by state, property type and contract date. Confirm current figures with the relevant revenue office or Housing Australia before relying on them.
What if the property was cheaper?
Duty, the deposit and most costs all scale with the price, so the shortfall closes faster than most people expect. Try a lower price and watch the position change.
What could your current savings support?
Working it backwards from your $90,000 in Western Australia, using the same property type and buying-cost assumptions — the approximate purchase price your cash covers at each deposit level.
- With a 5% deposit
- ~$920,000
- With a 10% deposit
- ~$615,000
- With a 15% deposit
- ~$460,000
- With a 20% deposit
- ~$365,000
Deposit $46,000 plus about $43,696 in buying costs.
Deposit $61,500 plus about $27,928 in buying costs.
Deposit $69,000 plus about $20,365 in buying costs.
Deposit $73,000 plus about $15,703 in buying costs.
This models your available cash only. It does not mean you could borrow the loan required — your income, expenses and the lender's assessment decide that separately.
The same purchase at 5%, 10%, 15% and 20% down
Alternative comparisons on the same price, state and costs — the cash each deposit level actually demands, the insurance premium it triggers and the loan you end up with.
5% deposit
Cash you need
$72,191
Deposit $37,500 plus about $34,691 in duty and buying costs.
- LVR
- 95%
- Estimated LMI
- $28,500
- Total loan
- $741,000
Covered, with about $17,809 left over.
10% deposit
Cash you need
$109,691
Deposit $75,000 plus about $34,691 in duty and buying costs.
- LVR
- 90%
- Estimated LMI
- $14,850
- Total loan
- $689,850
About $19,691 short of this scenario on your savings.
15% deposit
Cash you need
$147,191
Deposit $112,500 plus about $34,691 in duty and buying costs.
- LVR
- 85%
- Estimated LMI
- $6,375
- Total loan
- $643,875
About $57,191 short of this scenario on your savings.
20% deposit
Cash you need
$184,691
Deposit $150,000 plus about $34,691 in duty and buying costs.
- LVR
- 80%
- Estimated LMI
- None
- Total loan
- $600,000
About $94,691 short of this scenario on your savings.
On a $750,000 purchase in Western Australia, upfront costs come to about $34,691 on top of the deposit. Those generally can't be added to the loan.
Illustrative estimate based on the figures you entered. Actual outcomes may vary — the assumptions behind it are at the bottom of this page.
Your next move
About $19,691 short — let's look at what changes that
A shortfall doesn't mean the purchase doesn't work. The 60-second MortgageSMART™ quiz looks at your deposit, your capacity and the schemes you may be eligible for, and shows which lever moves the number fastest.
No documents · takes about 60 seconds · does not impact your credit score
The other half of the equation
Buying has two ceilings, not one
Cash ceiling
~$615,000
What your savings support at a 10% deposit, after duty and buying costs. Answered above.
Borrowing ceiling
Not yet checked
What loan your income supports once living costs, cards and other debts are assessed.
What you could actually buy is wherever those two ceilings overlap. On this scenario the loan you'd need is $689,850 — the estimator carries that figure across so you can see whether your income supports it.
A few questions about your household, income and commitments — no documents, no credit check. Prefer to run the numbers yourself? Open the borrowing power estimator.
The 80% line
Why 20% is the number everyone quotes
At or below 80% LVR, lenders generally don't require mortgage insurance, and many price their sharpest rates in that band. Above it, LMI applies and the premium climbs steeply as LVR rises — the jump between 90% and 95% is usually much larger than the jump between 85% and 90%.
That doesn't make a smaller deposit wrong. A smaller deposit can reduce the time needed to save, but it may also mean a larger loan, higher repayments and an LMI premium. Rather than treating 20% as a rule, compare the actual cost and funding position for your circumstances — which is what the deposit comparison above is for.
Mortgage insurance
How LMI is calculated — and what capitalising it really does
Lenders mortgage insurance protects the lender, not you, if the loan defaults and the security doesn't cover the debt. It's charged as a percentage of the loan amount, and that percentage is set by the insurer and the lender against your LVR band, the loan size, the loan purpose and your circumstances. Two lenders can quote materially different premiums on the same purchase.
Most borrowers capitalise the premium — adding it to the loan instead of paying it in cash. On a $750,000 purchase with a 5% deposit, the arithmetic runs: $750,000 price less a $37,500 cash deposit gives a base loan of $712,500, and the estimated premium is added on top to produce the total indicative loan. Any scenario above 80% LVR in the comparison above will show you that calculation on screen.
The consequence is that a capitalised premium is repaid with interest across the life of the loan, so it costs more than the headline premium. Guarantee schemes, a family guarantee and some professional packages can remove the premium entirely, each with their own eligibility rules and caps.
Government costs
Stamp duty is usually the largest single cost after the deposit
Every state and territory charges transfer duty on a sliding scale, and the difference between jurisdictions on the same price is often tens of thousands of dollars. First home buyers are treated very differently again — some states remove duty entirely below a threshold and taper it above, others limit relief to new homes or land to build on, and the ACT runs an income-tested scheme instead of a price cap.
Because those rules change with each budget, the figures in this calculator carry the date they were last checked. Confirm your own position with your state revenue office before you rely on a number, and treat any concession or grant shown here as potential rather than confirmed.
What counts as a deposit
Genuine savings. Some lenders require evidence of genuine savings, particularly for higher-LVR lending. What qualifies and the period required varies between lenders and loan structures.
Gifts from family. Usually acceptable, often with a letter confirming the funds are a gift and not repayable.
Equity in another property. Can replace cash entirely in some structures.
A guarantor. Where a family member offers security over their own property to reduce your effective LVR. Powerful, and not without consequences for them.
Grants and guarantee schemes change regularly and carry their own eligibility rules and caps. Check the current terms with the relevant authority before counting on one.
Buying your first home?
First home buyer? Explore your options.
Answer a few questions and we'll show you where you stand on deposit, capacity and the concessions, grants and schemes that could apply to your purchase.
No documents · does not impact your credit score
Common questions
Deposit questions we're asked most
How much deposit do I need to buy a house in Australia?
A 20% deposit avoids lenders mortgage insurance, but plenty of lenders will lend at 90% or 95% of the property value with LMI added, and some professions and guarantee schemes allow smaller deposits without a premium. The practical minimum is usually set by your borrowing capacity and the cash you need for stamp duty and buying costs, not by the deposit percentage on its own.
How is LMI calculated?
Lenders mortgage insurance is calculated as a percentage of the loan amount, and the percentage is set by the insurer and the lender against your LVR band, the loan size, the loan purpose and your circumstances. Premiums step up sharply as LVR rises — the jump between 90% and 95% is usually much larger than the jump between 85% and 90%. The premium is normally a one-off charge, and most borrowers capitalise it into the loan rather than paying it in cash. The figure in this calculator is an indicative estimate, never a quote.
What does capitalising LMI mean?
It means the premium is added to your loan rather than paid from your savings. On a $750,000 purchase with a 5% deposit, the base loan is $712,500 and a capitalised premium lifts the total loan above the purchase price. You then pay interest on the premium across the life of the loan, so it costs more than the headline figure suggests. Lenders cap how far above 95% LVR the capitalised loan can go.
What is LVR?
Loan to value ratio — your loan divided by the property value, as a percentage. A $600,000 loan on a $750,000 property is 80% LVR. Lenders price and assess based on LVR, and it's the number that decides whether LMI applies.
Can I borrow my stamp duty and buying costs?
Generally no. Duty, government registration fees, conveyancing, inspections, lender fees and settlement adjustments have to be funded from your own cash at or before settlement. That's why a deposit percentage on its own understates what you need — the calculator above adds every cost so the total is realistic.
Is my deposit the only cash I need?
No, and this is where buyers most often get caught. Transfer (stamp) duty, government registration fees, conveyancing, building and pest inspections, lender fees and settlement adjustments for council and water rates all need to be paid at or before settlement. The funding position above adds all of them.
What counts as genuine savings?
Some lenders require evidence of genuine savings, particularly for higher-LVR lending. What qualifies — accumulated savings, rent paid, term deposits, shares — and the period required varies between lenders and loan structures, and some lenders don't apply the requirement at all. Gifted funds and equity are often treated differently again.
How accurate is the stamp duty figure?
It applies the general residential scale published by your state or territory revenue office, and the first home exemption or concession we can model where you say you're a first home buyer. It can't test contract dates, ownership history, occupancy rules, residency or income tests, and it doesn't model foreign buyer surcharges or pensioner and off-the-plan concessions. Treat it as indicative and confirm with the revenue office.
Does a bigger deposit get me a better rate?
Often, yes. Many lenders price in LVR tiers, so crossing below 80% — and sometimes 70% or 60% — can unlock a lower rate as well as removing LMI. Whether waiting to save more is better than buying now depends on your circumstances, and comparing the actual cost of each funding position is more useful than treating 20% as a rule.
What price can my savings actually support?
That depends on the deposit percentage you use and the duty and buying costs in your state, because both scale with the price. The calculator above works it backwards for 5%, 10%, 15% and 20% deposits so you can see the approximate ceiling your cash supports. It is a cash ceiling only — whether a lender would approve the loan is a separate question answered by the borrowing power estimator.
How much deposit do I need for a $600,000, $700,000 or $800,000 house?
As a cash deposit alone, a 10% deposit is roughly $60,000, $70,000 or $80,000 — but the cash you actually need at settlement is larger, because stamp duty and buying costs sit on top and generally can't be added to the loan. In most states that adds tens of thousands more on an established purchase, and less if a first home concession or exemption applies. Set the price in the calculator above and it shows the full cash figure for your state rather than the deposit in isolation.
Can I use a gift from my parents as a deposit?
Yes, most lenders accept a gifted deposit, and many will want a short statutory declaration or letter from the person giving it confirming the money is a gift and not repayable. Some lenders also want to see the funds held in your account for a period, and a few still expect a portion of genuine savings alongside the gift. Policy varies more on this than almost any other deposit question, so lender choice matters.
Does a guarantor mean I need no deposit at all?
Sometimes. A security guarantee — where a family member offers equity in their property — can allow a purchase with little or no cash deposit and without LMI, because the guarantee covers the shortfall in security. You still need to cover stamp duty and buying costs unless those are also supported, the guarantor needs sufficient equity, and they take on a real legal obligation. It's a structure to plan carefully, not a shortcut.
What are genuine savings, and how long do I need to hold them?
Genuine savings means funds you accumulated yourself rather than received, and lenders typically look for around 5% of the purchase price held or saved over about three months. Gifts, tax refunds, bonuses and sale proceeds often don't count as genuine savings on their own, though rental payment history can substitute with some lenders. It usually only becomes an issue above 90% LVR.
Does First Home Super Saver money count towards my deposit?
Yes. Money released under the First Home Super Saver Scheme can form part of your deposit, and lenders generally treat the released amount as savings. Release takes time to process through the ATO and your fund, so request it well before you need the funds at settlement, and check the current release caps and eligibility rules with the ATO because they change.
Can I use the First Home Guarantee to buy with a 5% deposit and no LMI?
That's the intent of the federal guarantee schemes: an eligible first home buyer can purchase with a smaller deposit while the government guarantees part of the loan, so no lenders mortgage insurance premium is charged. Places, property price caps, income tests and participating lenders all apply and are reviewed periodically, so eligibility needs checking against the current rules rather than assumed.
Does my deposit have to be cash, or can I use equity?
Equity in a property you already own can be used instead of cash, either by refinancing to release funds or by adding a second loan split secured against that property. It's the usual route for upgraders and investors. The trade-off is that you're borrowing more overall and putting existing property up as security, so how the loans are split and structured matters much more than the headline rate.
What deposit do I need for an investment property?
The arithmetic works the same way, but the costs are usually higher: first home concessions don't apply, stamp duty is charged on the general scale, and some lenders price and assess investment lending more conservatively. Many investors target 20% to avoid LMI, though lending above 80% with a premium is available. Set the calculator above to an established purchase with first home buyer set to no to see the cash position.
Do I need money at contract signing as well as at settlement?
Usually, yes. A holding or initial deposit is generally paid when the contract is signed — often around 0.25% to 10% of the price depending on the state and the agreement — and it forms part of your deposit rather than being extra. That means part of your savings needs to be accessible weeks before settlement, which catches out buyers whose funds are locked in a term deposit or still in super.
Is it better to buy now with 10% or wait and save 20%?
It depends on what happens to prices while you save and what the insurance premium costs you. Waiting saves the LMI premium and can improve your lender pricing tier; buying earlier avoids chasing a rising price with a deposit that has to grow with it. Compare the two funding positions in the cards above, then check whether your income supports the larger loan — deposit is only one of the two ceilings.
What clients say
Want to talk it through with a broker?
We'll look at your savings, your capacity and the costs in your state, then tell you what's realistic now and what waiting would change.
Video, phone or email — whatever suits you.