Deposit Timeline: From $0 to 20%

Key takeaways

• Deposit needed = 20% of price, PLUS stamp duty and costs.
• If prices grow faster than you save, the gap widens despite your saving.
• A lower deposit with LMI ends the race earlier - at a cost.
• The savings rate is the variable you control; the price is not.

What is the actual target?

Not 20% of the purchase price. That is the deposit; you also need the transaction costs, which are not lent to you.

Stamp duty is the large variable and it differs enormously between states and between first home buyers and everyone else - several states offer full or partial concessions for first home buyers below a price threshold. Check your own state's current schedule, because these change with each budget.

How do you model the timeline?

Two rates matter: how fast you save, and how fast the price target moves.

Take a couple saving $2,500 a month towards a $140,000 deposit. Ignoring price growth, that is 56 months - a bit under five years. Now assume the property they want appreciates at 3% a year. The target grows by roughly $4,200 in year one alone, and keeps growing.

The gap still closes, because $30,000 a year of saving outpaces $4,200 a year of target growth. But the timeline extends, and at higher growth rates it can extend a long way. At growth rates approaching your annual savings amount as a percentage of the deposit, the finish line stops getting closer at all.

This is the arithmetic behind why low-deposit schemes and LMI exist. For many households, waiting for 20% is not a slower path to the same destination - it is a different destination.

What actually speeds it up?

• Increase the savings rate - the only input fully in your control, and the one with the largest effect.
• Lower the target - a cheaper property or a different suburb changes the finish line immediately.
• Use the schemes - the Home Guarantee Scheme and First Home Super Saver Scheme both exist to shorten this, subject to eligibility, caps and place availability.
• Accept LMI - it converts a savings problem into a cost, which for many households is the right trade.
• Family assistance - a gift or a guarantee, with the guarantee risk understood properly.

Keep the deposit somewhere sensible while you save. For most people that is a high-interest savings account rather than the share market, because a deposit needed within a few years should not be exposed to a drawdown that arrives the month before you buy.

Frequently asked questions

How long does it take to save a house deposit in Australia?

It depends on your savings rate, the price of the property you are targeting, and how fast that price is moving. Model it as your monthly saving against a target that includes stamp duty and costs, then adjust for expected price growth.

Do I need 20% deposit to buy a house?

No. Loans are available with far smaller deposits, generally with lenders mortgage insurance, and government guarantee schemes support low-deposit purchases for eligible buyers. Twenty percent avoids LMI; it is not a minimum.

Should I include stamp duty in my deposit target?

Yes. Transaction costs are paid from your own funds, not lent to you, and stamp duty is often the largest of them. First home buyer concessions vary by state and can change it substantially.

Where should I keep my deposit while saving?

Somewhere capital-stable and accessible, such as a high-interest savings account, and consider the First Home Super Saver Scheme if eligible. Money needed within a few years generally should not sit in volatile assets.

Related reading

• Total Upfront Cost: Beyond the Deposit
• Ways to Avoid LMI (and When to Pay It)
• Genuine Savings: What Lenders Count

Sources

• Moneysmart - saving for a home deposit — ASIC
• First Home Super Saver Scheme — Australian Taxation Office
• Home Guarantee Scheme — Housing Australia