First Home Guarantee vs paying LMI: which actually costs you less

The fork in the road for every first‑home buyer

Every first‑home buyer in 2026 eventually reaches the same question: do I stretch for a 5% deposit using the First Home Guarantee (FHBG), or do I save longer for a 10% deposit and pay lenders mortgage insurance (LMI) on the gap? Each path gets you into a property sooner or later, but the total cost can differ by tens of thousands of dollars.

This article lays out the hard numbers side by side using the latest 2026 policy settings, interest rates, and regulatory caps. No guesswork, no marketing spin – just a clear comparison so you can choose the route that puts more money in your pocket over the life of the loan.

The two paths explained

Path A – First Home Guarantee (FHBG)
From July 2026, the FHBG has no income cap and allows you to buy with a 5% deposit without paying LMI. The government guarantees the portion of the loan between 80% and 95% LVR. The Guarantee is limited to 35,000 places per financial year. Price caps apply:

· Sydney – $1.5 million
· Melbourne – $950,000
· Brisbane – $1 million
· Perth – $850,000
· Other capitals and regional centres have their own caps.

Path B – Standard loan with 10% deposit + LMI
Here you save a 10% deposit and take out a standard home loan. Because your LVR is 90%, the lender will charge LMI – a one‑off premium that protects them if you default. LMI is typically added to your loan balance, meaning you pay interest on it for the life of the loan.

Both paths require you to meet standard lender serviceability tests (APRA’s 3% buffer still applies, and most lenders impose a DTI cap of 6x from February 2026). The choice between them comes down to three things: how much cash you have, how quickly you want to buy, and the total cost over time.

The numbers: 5% FHBG vs 10% with LMI

To make this comparison real, we’ll use a $800,000 purchase – a realistic figure for a first home in Sydney’s outer suburbs or a median‑priced property in Brisbane. The interest rate is the lowest available variable rate in July 2026: 5.69% p.a. (comparison rate 5.85%). We assume a 30‑year loan term.

Upfront cash required

· Path A (FHBG 5% deposit):
Deposit = $40,000. Stamp duty: first‑home buyers in NSW (example) pay nil on homes up to $1 million, so $0. Legal and conveyancing ~$2,000. Total upfront ≈ $42,000.

· Path B (10% deposit + LMI):
Deposit = $80,000. LMI on a 90% LVR loan of $720,000: the premium is typically 2.5% of the loan amount = $18,000. (LMI varies by lender; some charge less for smaller loans or strong credit. We use a conservative mid‑point.) Most lenders allow you to capitalise the LMI premium, adding it to the loan. Total upfront cash = $80,000 deposit + $2,000 legal = $82,000.

Loan amounts

· Path A loan: $760,000 (no LMI added)
· Path B loan: $720,000 + $18,000 LMI = $738,000 (if capitalised)

What LMI costs in 2026

LMI is not a flat fee. It rises with LVR and loan size. For a $720,000 loan at 90% LVR, most insurers charge between 1.8% and 3.0% of the loan. Using 2.5% gives $18,000. If you pay LMI as a single upfront premium, that’s the number. If capitalised, you’ll also pay 5.69% interest on that $18,000 for up to 30 years – an extra $19,400 in interest over the loan term (assuming you don’t refinance or pay it off early).

Key point: The true cost of LMI is not just the premium. It’s the compound interest you pay on that premium over decades.

Total upfront cost comparison

· Path A (5% FHBG): $42,000 cash needed at settlement.
· Path B (10% + LMI): $82,000 cash needed at settlement – nearly double.

For the buyer with limited savings, Path A is the clear winner in upfront affordability. You need $40,000 less cash to get the keys. That’s a significant advantage for anyone who can’t wait another two or three years to save the extra $40,000.

Monthly repayment comparison

Now we look at ongoing costs. We’ll compare the two loan amounts: $760,000 vs $738,000.

· Path A (5% FHBG): Loan $760,000 at 5.69% p.a. Monthly repayment (P&I) ≈ $4,409
· Path B (10% + LMI capitalised): Loan $738,000 at 5.69% p.a. Monthly repayment ≈ $4,282

Path B has a lower monthly payment by $127 per month because the loan principal is $22,000 smaller. Over one year, that’s about $1,524 less. Over the full 30‑year term, Path B saves $45,720 in nominal monthly payments.

But that’s only half the story. Path B required an extra $40,000 in deposit. If that money could have been invested, or if you could have used it for other purposes, it has an opportunity cost. Meanwhile, Path A gets you into the market sooner – and property values typically grow over time, potentially outweighing the slightly higher monthly payment.

Long‑term cost: higher loan balance vs LMI premium

The core trade‑off is:

· Path A starts with a larger loan ($760k vs $738k) but pays zero LMI.
· Path B starts with a smaller loan but pays $18,000 in LMI upfront (or capitalised).

Total interest paid over 30 years (assuming no extra repayments):

· Path A: total interest ≈ $827,000
· Path B: total interest ≈ $803,000

The difference is $24,000 less interest on Path B because the loan is smaller. But don’t forget: Path B also paid $18,000 LMI. So the net financial benefit of Path B over 30 years is $24,000 – $18,000 = $6,000 (if LMI is not capitalised). If LMI is capitalised, the interest on that $18,000 eats up much of the saving, leaving less than $2,000 difference over 30 years.

In other words, the total lifetime cost difference between a 5% FHBG and a 10%+LMI loan is very narrow – maybe $2,000 to $6,000 in favour of the 10% path. But that doesn’t account for the extra years of renting while you save the extra deposit.

Other factors that tip the scales

Approval speed and complexity

· FHBG: You need a participating lender, a place within the 35,000 annual cap, and you must meet property price caps. The application can take slightly longer because the government guarantee must be verified.
· Standard loan with LMI: Lenders can process quickly; LMI approval is usually automated. Fewer restrictions on property type.

Property type restrictions

· FHBG: Only existing houses, apartments, and townhouses. Off‑the‑plan is allowed, but must be completed within 24 months. No investment properties. You must live in it.
· 10% + LMI: You can buy any property the lender accepts, including investment properties (though LMI rates are higher for investors).

Cash flow flexibility

With a 5% deposit, your LVR is 95%. That means you cannot refinance to a better rate until you build 5% equity (or the property value rises). With a 10% deposit, you have a lower LVR (90%), giving you access to more competitive rates sooner.

Stamp duty and grants

Neither path directly affects stamp duty. However, many states offer stamp‑duty concessions for first‑home buyers on homes up to certain thresholds. The FHBG property price caps often align with those thresholds. Always check your state revenue office for current exemptions.

FAQ

Q: If I use the First Home Guarantee, will I pay less overall than if I save a 10% deposit and pay LMI?

A: In most cases, the total cost difference is small – often less than $6,000 over 30 years. The FHBG path requires much less cash upfront ($42,000 vs $82,000 in our example). You get into your home years earlier, which may outweigh the slight long‑term cost advantage of a 10% deposit.

Q: How much LMI would I pay on a $750,000 property with a 10% deposit in 2026?

A: On a $750,000 purchase, a 10% deposit is $75,000. Loan amount $675,000. LMI at 90% LVR typically runs 2% to 3% of the loan – roughly $13,500 to $20,250. The exact depends on your lender, location, and credit profile. Capitalising that adds $800 to $1,200 per year in extra interest at current rates.

Q: Do I still need to pay stamp duty with the First Home Guarantee?

A: Yes – the FHBG is a loan guarantee, not a stamp‑duty exemption. However, most states offer separate first‑home‑buyer stamp‑duty concessions. For example, in NSW, first‑time buyers pay no stamp duty on homes up to $1 million as of 2026. In Victoria, a partial concession applies up to $800,000. Check your state revenue office for current thresholds.

Q: What happens if property prices drop? Could I be in negative equity with a 5% deposit?

A: Yes, that’s a risk. With a 5% deposit, any price fall of more than 5% puts you in negative equity – you owe more than the home is worth. That makes it harder to sell or refinance. With a 10% deposit, you have a larger buffer. However, since 2020, Australian property has rarely experienced prolonged drops of more than 5‑10% in metro areas.

Q: Can I combine the First Home Guarantee with other state grants like the First Home Owner Grant (FHOG)?

A: Yes, you can typically use both together, provided you meet each scheme’s eligibility. The FHOG is a cash grant for new homes, while the FHBG covers established and new homes. You cannot use the FHBG with the Family Home Guarantee or the Regional First Home Buyer Guarantee – they are separate programs.

Sources

· Housing Australia – First Home Guarantee eligibility and price caps (July 2026 update)
· Reserve Bank of Australia – Cash rate target (4.35% as of July 2026)
· Australian Prudential Regulation Authority (APRA) – ADI lending benchmarks (3% buffer, DTI 6x cap)
· NSW Revenue – First‑home buyer stamp‑duty thresholds
· LMI industry data – average premium rates for 90% LVR loans (2026)

Make your own comparison

Every buyer’s numbers differ – your purchase price, deposit size, lender rate, and LMI premium will vary. Use our loan repayment calculator to model your exact scenario and see which path saves you more.

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(Compare any loan amount, rate, and term side by side.)

Or speak to a mortgage writer directly and get tailored advice.
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For more detail on the First Home Guarantee itself, read our guide:
· First Home Guarantee 2026 – full overview
· How to buy with a 5% deposit without LMI
· State‑by‑state first‑home buyer grants and concessions