Designing a First‑Home Deposit Strategy Your Broker Should Walk Through

For a first‑home buyer, a “good” deposit isn’t just a number; it’s a plan that balances how soon you can buy with how safely you can hold the loan if rates rise. A good broker will show you, in numbers, how a 5–10% deposit with LMI or a scheme compares to saving 20%, using realistic repayments and a stress test 3% above today’s rates (in line with APRA guidance).

Here’s how that conversation should run — and how you can get decision‑grade clarity this week.

Your broker should model several deposit paths, not just aim for 20%.

Step 1: Clarify the real deposit target (including costs)

A broker won’t just ask, “How much have you saved?” They’ll map what you actually need:

1. Minimum lender deposit (often 5–10%).
2. Stamp duty and legals (unless fully waived under a scheme).
3. LMI or scheme eligibility.
4. A post‑settlement buffer.

Typical deposit ranges a broker will test

Assume a $750,000 purchase in NSW.

• 5% deposit = $37,500
• 10% deposit = $75,000
• 20% deposit = $150,000

On top of that, you may need costs of 4–6% of the price (stamp duty, legal, inspections, moving), unless schemes or concessions reduce them.

A good broker will build a side‑by‑side comparison including the impact of LMI.

Figures indicative only and will vary by scheme, lender and state duties.

Step 2: LMI vs saving longer — the real trade‑off

What a broker should explain about LMI

Lenders Mortgage Insurance (LMI) is a once‑off premium when you borrow above 80% LVR. It protects the lender, not you, but it can bring forward your purchase by months or years.

A good broker will:

• Price LMI across multiple lenders.
• Show you time to target (how long to save an extra 5–10%).
• Compare that to estimated price growth and rent in that time.

Worked example: 5% + LMI vs waiting for 20%

Assume:

• Target property today: $750,000
• You can save $2,500 per month.
• Market growth assumption: 3% per year.

1. Buy now at 5% deposit

   • Deposit: $37,500 + ~$37,500 for costs and buffer = ~$75,000
   • Loan: ~$712,500 (LVR ~95% with capitalised LMI)
   • If interest is 6% p.a. over 30 years, P&I is ~ $4,275/month.
   • Broker will also stress test at 9% (APRA +3% buffer) ≈ $5,755/month.

2. Wait ~3 years for 20% deposit

   • Extra savings needed (beyond your current $75k): ~$120k → ~48 months at $2,500/month.
   • But if prices grow 3% p.a., the property might cost ~$820k in three years.
   • 20% of $820k is $164k, so your target keeps moving.

A good broker doesn’t push you to pay LMI. They show you the compounding maths and check whether paying LMI to get in now is safer than chasing a rising 20% target.

For self‑employed buyers, this decision also has to line up with business cash flow and buffers. That’s covered in more detail in Smart Deposit Strategies For Self‑Employed First‑Home Buyers.

Step 3: Using government schemes properly (not just hopefully)

Schemes can effectively replace some or all of your cash deposit, but they come with strict rules.

Schemes a broker should check

• First Home Guarantee (FHBG) – as little as 5% deposit, no LMI, price caps and owner‑occupier rules.
• Regional and state grants / concessions – stamp duty reductions or exemptions, often linked to price caps.
• FHSS (First Home Super Saver) – saving part of your deposit via super.

A good broker will:

1. Confirm basic eligibility (citizenship, residence, prior property ownership).
2. Check price caps line up with realistic properties in your target suburbs.
   (See First‑Home Buyers: Using Suburb Knowledge to Get In Sooner for how this plays out.)
3. Consider how different lenders treat your income under APRA’s 3% buffer.
4. For self‑employed buyers, match FHBG with lender policies — as explained in First Home Guarantee for Self‑Employed Buyers: What Really Works.

The point: a scheme can shrink the deposit hurdle, but only if all three rule sets line up — scheme, state revenue office, and lender credit policy.

Family help needs careful structuring so everyone’s risk is understood.

Step 4: Family guarantees and gifts — how a careful broker thinks

Family help can be powerful and risky. A good broker will slow this conversation down.

Gifts vs loans

Lenders treat a true gift very differently from a loan from parents.

• A non‑repayable gift can boost your deposit and reduce LMI.
• A repayable family loan counts as a liability and can cut borrowing capacity.

Brokers know lenders will dig into this. They’ll help document the arrangement properly so it matches the reality and doesn’t blow up your approval (see also the issues flagged in /insights/structuring-family-assistance-children-expensive-markets).

Family guarantee basics

With a family guarantee, a parent offers equity in their home as extra security so you can borrow up to 100% of the purchase plus costs.

A good broker will walk through:

• How much of the parents’ property is actually available as security.
• The risk that if you default and the sale doesn’t cover the debt, the lender can chase the guarantor’s other assets (personal guarantees and mortgages operate separately).
• A plan to release the guarantee once your LVR drops to ~80% through repayments and/or growth.

They should also model worst‑case scenarios: loss of income, forced sale, and how that could impact your parents.

Step 5: Designing buffers and structures that survive rate rises

Roy Morgan data shows more than a quarter of mortgage holders are already ‘At Risk’ by their definition when rates move up. A good broker aims to keep you out of that group.

What a safety‑first structure includes

1. 2–3 months of living expenses in cash or an offset at settlement.
   For self‑employed buyers, evidence suggests 2–3 months’ buffer can be safer than stretching to a 20% deposit with zero savings left.
2. Stress‑tested repayments 2–3% above the expected rate, matching APRA’s buffer guidance.
3. Realistic HEM‑based living expenses — not fantasy budgets you can’t sustain.

Loan features that support your deposit strategy

• Offset account to park your remaining savings and future surplus.
• Principal & interest from day one, unless there’s a clear, temporary reason for interest‑only.
• Separate splits if you are also funding things like solar or renovations, so you’re not paying a 30‑year rate on a 10‑year asset.

These are the sorts of structural decisions we explore in more location‑specific guides like Mascot Apartment Deposits: How Much You Really Need and Why.

Step 6: Your one‑week action plan with a broker

In a 30–60 minute strategy call, a good broker should help you:

1. Set your purchase range based on current borrowing power at a stressed rate.
2. Model three deposit paths for your target price: 5%, 10%, 20% (with/without schemes and family help).
3. Check scheme eligibility and realistic price caps for your suburbs.
4. Agree on a savings and buffer target for the next 3–12 months.
5. Decide whether you’re truly better off buying sooner with LMI or waiting for a bigger deposit.

If, by the end of that discussion, you can’t say how much you need, by when, and what happens if rates rise 2–3%, you haven’t had a proper deposit‑strategy conversation yet.

FAQs: What first‑home buyers ask about deposits

Is a 5 percent deposit enough for a first home in Australia?

Yes, many first‑home buyers purchase with a 5% deposit using either LMI or the First Home Guarantee, provided they meet scheme and lender rules. The real question is whether you can also afford stamp duty, other costs, and a post‑settlement buffer. A broker will test your borrowing capacity and cash position at a stressed interest rate before recommending a 5% path.

Should I pay LMI or keep saving for a bigger deposit?

It depends on how fast you can save and how quickly your target market is moving. Paying LMI to buy now can be worthwhile if prices are rising faster than your savings and you can still maintain a safety buffer. A broker should run side‑by‑side scenarios including total cost over the first 5 years, not just the headline LMI premium.

How much deposit do I need to avoid LMI?

You usually need at least a 20% deposit plus costs to avoid LMI, though some professions or niche lender policies can vary this. For high‑density or risk‑rated postcodes, lenders might effectively require more than 20% through reduced LVR caps. A broker will check postcode and property‑type rules before you lock onto an exact target.

Is it better to use a family guarantee than pay LMI?

Not always. A family guarantee avoids LMI but exposes your parents’ home if things go wrong, and it can be emotionally stressful. A good broker will compare LMI costs against the extent of the guarantee, your parents’ risk tolerance, and a clear plan for releasing the guarantee, then help your family decide if that trade‑off feels acceptable.

Can I use my super as part of my first‑home deposit?

You can’t use your existing super balance directly, but the First Home Super Saver (FHSS) scheme lets you make voluntary contributions and later withdraw them (plus associated earnings) for a first‑home deposit. A broker will work alongside your tax adviser to check FHSS limits, tax outcomes and timing so it complements, rather than replaces, your regular savings plan.

Key takeaways

• A good broker will model multiple deposit paths (5%, 10%, 20%) with real repayment and stress‑test numbers.
• Paying LMI or using schemes can safely bring your purchase forward if you also keep a 2–3 month cash buffer.
• Family help must be structured carefully, with clear documentation and a plan to release any guarantees.
• Your deposit strategy isn’t just about buying; it’s about still being comfortable if rates rise 2–3%.

Next step: Book a free 15‑minute deposit strategy call at /contact to run your 3 best‑fit scenarios with one expert who understands your tax, your loan and your future plans — CPA, Tax Agent and Mortgage Broker in one conversation.

General advice only.