How to Stack SA First Home Incentives: FHOG, Stamp Duty, HomeStart, and the Federal Scheme

No single South Australian government website models how the state's four main first home buyer incentives interact. RevenueSA covers stamp duty and the FHOG; HomeStart Finance describes its own loan products; the National Housing Finance and Investment Corporation explains the federal First Home Guarantee. Each portal describes itself. None of them tells you what the total cash position looks like when you combine them, or which combinations produce the lowest out-of-pocket requirement for a specific buyer scenario.

This page does that. Here is how to stack SA's first home buyer incentives correctly, what conditions must be satisfied for each layer, where the programs conflict rather than compound, and what the combined effect looks like in three realistic purchase scenarios.

The Four Layers of the SA Incentive Stack

Layer 1: Stamp Duty Abolition

Since June 6, 2024, eligible first home buyers in South Australia pay zero stamp duty on new homes — no value cap, no tiered relief. This applies to:

• Newly built homes never previously occupied or sold as a residence
• Off-the-plan apartments
• Vacant land intended for construction of a new home
• Substantially renovated properties (where the bulk of the original structure has been replaced)

For established homes — existing houses that have been lived in previously — there is no stamp duty exemption or concession whatsoever in South Australia. A first home buyer purchasing a $600,000 established home pays the full rate schedule: $26,830 in stamp duty.

The hidden bonus: When stamp duty is fully abolished, the Land Services SA ad valorem transfer registration fee is also waived. This is a statutory link in the Real Property (Fees) Notice: where a transfer is entirely exempt from stamp duty, the transfer registration fee drops to a flat $198 minimum. On a $600,000 property, the ad valorem transfer fee would otherwise be approximately $5,952. That waiver is automatic — it does not require a separate application.

Layer 2: The $15,000 First Home Owner Grant (FHOG)

The FHOG provides a $15,000 tax-free cash payment to eligible first home buyers purchasing or building a new home. Since June 6, 2024, the property value cap has been removed entirely. Previously the grant was restricted to properties under $650,000; it now applies regardless of the new home's final value.

Eligibility requirements: all applicants must be natural persons over 18; at least one must be an Australian citizen or permanent resident; neither the applicant nor their spouse or domestic partner may have previously owned and occupied any Australian residential property for six months or more since July 1, 2000; and the buyer must occupy the home as their principal place of residence for a continuous six months commencing within 12 months of settlement or construction completion.

The $15,000 is paid after the property settles (for completed new builds) or after construction reaches slab stage (for land-and-build contracts). It is not available as a deposit — it arrives after you have already committed the funds at settlement.

Layer 3: HomeStart Finance Products

HomeStart Finance is the South Australian Government's own lender. It sits alongside mainstream banks as an alternative, not a supplement — if you borrow from HomeStart, you choose HomeStart, not a big-four bank. The critical HomeStart products for first home buyers:

The Shared Equity Option is the most powerful stacking mechanism for buyers under the income cap ($120,000 for singles, income cap to be confirmed for couples). HomeStart contributes up to 25% of the property price as an interest-free, repayment-free loan — you repay it only when you sell or refinance. A buyer targeting a $500,000 new build can have HomeStart contribute $125,000 as equity, meaning they only need to service the remaining $375,000 as a loan. The property price cap for the Shared Equity Option is $750,000 in metropolitan Adelaide.

The Repayment Safeguard is a HomeStart feature with no mainstream equivalent: your initial repayments are calculated based on affordability rather than a fixed loan term, and they are insulated from interest rate changes for 12-month periods. For buyers anxious about rate movements, this is a structural protection worth modelling.

Layer 4: Federal First Home Guarantee

The federal First Home Guarantee (formerly the First Home Loan Deposit Scheme) allows eligible buyers to purchase with a 5% deposit without paying Lenders Mortgage Insurance. As of October 2025, income caps were abolished — no singles income limit, no couples income limit. Annual allocation quotas were also removed; the scheme now operates as an uncapped, demand-driven program.

SA property price caps: $900,000 for Adelaide and regional centres; $500,000 for the rest of SA.

The First Home Guarantee operates through participating mainstream lenders (the big four banks and numerous smaller lenders). It does not operate through HomeStart — choosing the federal guarantee means choosing a mainstream lender, which means not accessing HomeStart-specific products like the Graduate Loan or Shared Equity Option.

Where the Programs Stack vs Where They Conflict

Understanding which combinations are possible and which are mutually exclusive is the core planning task.

Stamp duty abolition + FHOG + HomeStart or federal guarantee: These all stack. You can claim stamp duty abolition and the FHOG regardless of which financing pathway you use — HomeStart or mainstream bank with the federal guarantee. The stamp duty and FHOG are state government grants applied at settlement; your lender choice does not affect them.

HomeStart Graduate Loan + FHOG + stamp duty abolition: This is the maximum stacking position for a Certificate III+ holder targeting a new build. You bring a 2% deposit, HomeStart lends without LMI, you pay zero stamp duty, you receive $15,000 FHOG, and the Land Services SA transfer fee drops to $198.

HomeStart Shared Equity + FHOG + stamp duty abolition: The same stacking applies. The Shared Equity Option reduces the loan you need to service while the state grants reduce cash-to-close. For single-income buyers under the $120,000 income cap, this combination produces the lowest possible upfront cash requirement and monthly repayment on a new build in SA.

Federal First Home Guarantee + FHOG + stamp duty abolition: This is the mainstream-bank version of the stack. Five percent deposit, no LMI, zero stamp duty, $15,000 FHOG. You lose access to HomeStart-specific products but gain access to a wider lender panel and potentially more competitive interest rates.

HomeStart Shared Equity + Federal First Home Guarantee: These cannot be combined. HomeStart is a direct lender; the federal guarantee applies to mainstream lenders. You choose one financing pathway.

Help to Buy (federal, launched December 2025) + HomeStart: These also cannot be combined. Help to Buy is a federal shared equity scheme operating through mainstream lenders with its own income caps ($100,000 for singles, $160,000 for couples) and property caps ($900,000 for Adelaide). If eligible for both HomeStart Shared Equity and federal Help to Buy, the better choice depends on property price, income, and how long you expect to hold the property before selling.

Three Worked Scenarios

Scenario A: Certificate III Holder, $530,000 New House-and-Land Package, Playford

Buyer profile: Single, $75,000 income, Certificate III in Construction, $25,000 savings.

This buyer completes settlement with their savings intact plus a positive cash position from the FHOG. The Graduate Loan requires a 2% deposit on the total purchase price — but the $15,000 grant lands at settlement, effectively meaning the $10,600 deposit is covered with surplus. The critical remaining cost is the construction loan drawdowns during build; the FHOG $15,000 typically arrives after the slab is poured on a build contract.

Scenario B: Couple, $600,000 New Build, HomeStart Shared Equity

Buyer profile: Couple, combined income $110,000 (within $120,000 cap is subject to HomeStart eligibility assessment — check current caps), $30,000 savings.

This couple's monthly repayment is calculated on an $480,000 loan, not $600,000 — a significant difference in serviceability. The 20% equity share is repaid when they sell, refinance, or voluntarily buy out the share.

Scenario C: Established Home Purchase, $600,000

Buyer profile: Same couple as Scenario B, but targeting an established $600,000 home.

The same couple needs $95,280 to buy established at $600,000, versus approximately $17,000 on a comparable new build with full incentive stacking. That is a gap of approximately $78,000 — and the established home buyer also faces standard mortgage LMI costs if their deposit is below 20%.

Who This Is For

• SA first home buyers who have read about FHOG and stamp duty separately but have not yet modelled their combined cash-to-close position
• Certificate III or higher qualification holders who want to know whether HomeStart's Graduate Loan is a better entry point than the federal First Home Guarantee
• Single-income buyers under the $120,000 income cap who are evaluating HomeStart's Shared Equity Option to boost purchasing power without increasing monthly repayments
• Couples comparing the $750,000 property price cap for HomeStart Shared Equity against properties in their target areas
• Buyers who want to understand the timing of FHOG payment relative to settlement and construction milestones

Who This Is NOT For

• Established home buyers — the FHOG and stamp duty abolition do not apply; the stacking system is new-build specific
• Buyers already fully through the finance approval and contract stage with all programs confirmed
• Investment property purchasers — all SA incentives require owner-occupier residency compliance

Tradeoffs

The incentive stack heavily favours new builds at the cost of location flexibility. New builds are concentrated in Adelaide's outer suburban corridors — Playford, Angle Vale, Aldinga, Mount Barker — where land is available. Established homes in inner and middle-ring suburbs carry a $42,000 to $47,000 government cost penalty. If your employment or lifestyle requires an inner suburb, the incentive stack does not override the cost of the commute from the outer corridors.

The Shared Equity Option reduces monthly repayments but creates a long-term equity obligation to the government. When property values appreciate — and Adelaide has grown by over 85% since 2020 — the government's share appreciates proportionally. A 20% equity stake in a $600,000 home today is $120,000; if that home is worth $750,000 in five years, the government's repayable share is $150,000. Buyers who expect to hold for a long time and have strong income growth may prefer a higher-deposit loan without shared equity.

The South Australia First Home Buyer Guide includes the full incentive stacking system with all four programs, three fully worked cash-to-close scenarios at different price points, HomeStart product comparisons, and the residency compliance requirements for protecting your FHOG if a construction delay pushes your timeline.

Frequently Asked Questions

Can I get the FHOG and stamp duty abolition if I use the federal First Home Guarantee?

Yes. The FHOG and stamp duty abolition are state government programs administered through RevenueSA. They apply to any eligible first home buyer purchasing a new home in SA, regardless of which lender or federal scheme you use. The federal First Home Guarantee is a separate federal mortgage mechanism — it determines your deposit and LMI situation, not your eligibility for state grants.

What counts as a "new home" for SA FHOG and stamp duty abolition?

A new home is a dwelling that has never previously been occupied or sold as a place of residence; a substantially renovated home where the bulk of the original structure has been replaced; an off-the-plan apartment; or a property purchased under a comprehensive building contract (house-and-land package). Vacant land for construction of a new home also qualifies for stamp duty abolition, though the FHOG applies only once the home is constructed and habitable.

When does the $15,000 FHOG actually arrive?

For completed new homes, the FHOG is paid after settlement. For house-and-land packages (progressive construction loans), the FHOG is typically released after the slab is poured — usually at the second construction drawdown milestone. It does not arrive on the day you sign the building contract. You need to have the full deposit funds available at settlement and slab stage; the FHOG replenishes your savings position afterward.

How long do I have to live in the home after settlement?

You must occupy the home as your principal place of residence for a continuous six months, commencing within 12 months of settlement for completed homes or within 12 months of the home being lawfully usable for a new build. Failure to comply allows RevenueSA to claw back the stamp duty relief and FHOG, plus interest and potential penalties.

Is the Help to Buy federal scheme better than HomeStart Shared Equity for SA buyers?

It depends. HomeStart Shared Equity allows up to 25% government equity (vs Help to Buy's 40% maximum but 30,000-place cap), has an income cap of $120,000 (vs Help to Buy's $100,000 for singles, $160,000 for couples), and a property price cap of $750,000 in metro Adelaide (vs $900,000 for Help to Buy in Adelaide). HomeStart also offers the Repayment Safeguard — insulation from rate changes for 12-month periods — which Help to Buy does not. For buyers under both income caps, HomeStart's higher equity ceiling and the Repayment Safeguard often make it the stronger choice for SA-specific new builds.

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