The question is rarely just whether you can afford a property. It is whether you have enough cash ready when the right home appears. If you are asking how much deposit needed to buy in Sydney, the short answer is that it can be as little as 5% in some circumstances, but a 20% deposit remains the benchmark that gives buyers the most flexibility and usually the lowest ongoing costs.
The more useful answer depends on your borrowing capacity, the property price, your purchase costs and whether you qualify for a government-backed low-deposit pathway. Knowing the difference can help you set a realistic target rather than waiting indefinitely for a figure that may not be necessary for your situation.
How Much Deposit Needed for a Home Purchase?
For many Australian buyers, a 20% deposit is the traditional target. On an $800,000 property, that is $160,000. With a deposit at this level, you are generally borrowing 80% of the property value, often referred to as an 80% loan-to-value ratio or LVR. This usually means you can avoid lender's mortgage insurance, known as LMI.
However, 20% is not a universal requirement. Many lenders will consider buyers with a 10% deposit, and some will lend with a 5% deposit where the applicant has a strong financial position or access to an eligible government scheme. A smaller deposit gets you into the market sooner, but it also means a larger loan, higher repayments and potentially LMI.
It is helpful to separate the deposit from the total cash you need. Your deposit goes towards the purchase price. You will also need funds for stamp duty, legal fees, building and pest inspections, loan establishment costs and moving expenses. In NSW, these additional costs can be substantial, particularly on higher-value Sydney homes.
A simple deposit comparison
Using an $800,000 purchase price, a 5% deposit is $40,000, a 10% deposit is $80,000, and a 20% deposit is $160,000. Those figures do not include buying costs.
For a first-home buyer, available concessions may reduce stamp duty depending on the property, price and eligibility rules. Other purchasers should budget for the full duty amount unless they have confirmed an exemption or concession applies. Your solicitor or conveyancer and finance professional can help you estimate the full figure before you make an offer.
The Deposit You Pay at Exchange Is Not Always Your Full Deposit
In NSW, the contract deposit is commonly 10% of the purchase price and is paid when contracts exchange. This is the amount the vendor expects to see under the contract, not necessarily the amount you have saved in cash.
A buyer may negotiate a lower deposit, such as 5%, particularly where their loan is approved and the vendor is comfortable with the terms. Whether this is accepted is up to the vendor. In a competitive campaign, a full 10% contract deposit can make an offer more attractive, but it should never leave you without money for the rest of the transaction.
If you buy at auction, there is generally no cooling-off period, so your finance and deposit arrangements need to be in place before you bid. For a private treaty sale, NSW buyers usually have a five-business-day cooling-off period unless it is waived. The initial holding deposit can be smaller, but it is not a substitute for having the agreed deposit ready at exchange.
Why a 20% Deposit Still Matters
Saving 20% can feel out of reach in Sydney, especially while paying rent. Yet it remains a worthwhile target when your timeframe allows because it can improve both your loan options and your monthly budget.
LMI is the clearest reason. This insurance protects the lender, not the borrower, if the loan is not repaid. It is usually charged when you borrow more than 80% of the property's value. Depending on the loan size and LVR, the premium can run into many thousands of dollars and may be added to your loan, increasing the interest paid over time.
A larger deposit also gives you a buffer if property values soften. If you need to sell soon after buying, or refinance in a lower market, having more equity can make the process less stressful. It may also help you access sharper interest rates, although pricing differs between lenders and products.
That said, waiting for 20% is not automatically the best move. If your income is stable, your borrowing capacity is sound and property prices are moving ahead of your savings rate, a lower-deposit purchase may suit your longer-term plan. The right decision is about affordability, not simply reaching a round number.
Low-Deposit Options for First-Home Buyers
Eligible first-home buyers may be able to purchase with a 5% deposit through a government-backed guarantee program, subject to places, price caps, lender requirements and other criteria. Under these programs, the government guarantees part of the loan, helping eligible buyers avoid LMI without needing a 20% deposit.
There are also schemes for some single parents or legal guardians that may allow a lower deposit, as well as state-based first-home buyer support. Program names, income limits, property caps and availability can change, so it is wise to check the current rules before basing your purchase timeline on them.
Low-deposit finance is not only for first-home buyers. Some professionals with reliable income, investors with equity in another property, and buyers using a family guarantee may have alternatives. A family guarantee can use equity in a relative's property as additional security, but it creates real obligations for everyone involved. It needs careful legal and financial advice, not a quick family agreement at the kitchen table.
Do Not Spend Every Dollar on the Deposit
A common mistake is putting every available dollar into the deposit and arriving at settlement with no margin. Home ownership brings costs that do not wait for your savings account to recover: strata levies, council rates, insurance, repairs, appliances and removalists can all land early.
Keep an emergency buffer after allowing for your deposit and purchase costs. The appropriate amount varies, but your buffer should reflect your job security, household commitments and the condition of the property. An older terrace with an ageing roof needs a different contingency plan from a newer apartment with a detailed strata report.
Your pre-approval should also be treated as a guide, not permission to stretch to the maximum. Lenders assess your ability to repay at a higher interest rate, but your own budget should allow room for lifestyle costs, future rate changes and the surprises that come with moving home.
A Practical Way to Set Your Deposit Target
Start with the type of property and areas you are genuinely considering. A deposit goal without a price range is only half a plan. Once you have a likely purchase range, calculate 5%, 10% and 20% of that figure, then add estimated stamp duty and buying costs.
Next, compare the repayments and upfront costs at each deposit level. A 5% deposit may get you into a home sooner, while a 10% or 15% deposit could reduce LMI and repayments enough to make waiting worthwhile. The answer may also change if you are buying an investment property, as the lender's deposit requirements and your cash-flow considerations can be different.
Finally, obtain finance guidance before falling in love with a listing. A clear pre-approval, an understanding of your true cash position and a sensible ceiling give you confidence to act when the right opportunity comes up. At Your Next Move Real Estate, we see the strongest buyers make decisions from a prepared position, not under pressure at the final inspection.
What About a Rental Bond?
If your question relates to renting rather than buying, the figures are different. In NSW, a rental bond can be no more than four weeks' rent, and you may also need rent in advance. This money is not a purchase deposit and does not build equity, but it still needs to be included in your moving budget.
For buyers, the best deposit is not necessarily the biggest one you can save. It is the amount that lets you purchase a suitable property, meet every cost with confidence and keep enough breathing room for life after settlement.
