Stamp Duty on $450K Property — SA
Stamp duty on a $450,000 property in South Australia is $18,830.00. See total costs, first home buyer savings, and compare to other states.
Last verified: 1 July 2025Stamp Duty: $18,830.00
On a $450,000 property in South Australia, stamp duty is $18,830.00 at an effective rate of 4.18% (2025-26 rates).
Cost Breakdown
| Property price | $450,000 |
| Stamp duty (standard buyer) | $18,830.00 |
| Effective stamp duty rate | 4.18% |
| Legal / conveyancing fees (est.) | $2,000.00 |
| Building & pest inspection (est.) | $500.00 |
| Total purchase cost | $471,330.00 |
First Home Buyer Stamp Duty — SA
At $450,000, first home buyer concessions in South Australia do not reduce stamp duty. The property value exceeds the concession threshold. Standard duty of $18,830.00 applies.
Foreign Buyer Stamp Duty
Foreign purchasers pay an additional 7% surcharge ($31,500.00) on top of standard stamp duty.
Total foreign buyer stamp duty: $50,330.00
Stamp Duty on $450K — All States
| State | Stamp Duty | Effective Rate |
|---|---|---|
| New South Wales | $14,985.00 | 3.33% |
| Victoria | $22,070.00 | 4.90% |
| Queensland | $14,175.00 | 3.15% |
| Western Australia | $15,390.00 | 3.42% |
| South Australia | $18,830.00 | 4.18% |
| Tasmania | $16,123.00 | 3.58% |
| Australian Capital Territory | $10,813.00 | 2.40% |
| Northern Territory | $20,057.00 | 4.46% |
Mortgage Impact — Adding Stamp Duty to Your Loan
If you add $18,830.00 stamp duty to your home loan instead of paying upfront, here is how it affects your repayments (based on 80% LVR, 6.25% rate, 30-year term):
| Monthly repayment (without stamp duty in loan) | $2,216.58 |
| Monthly repayment (with stamp duty in loan) | $2,332.52 |
| Extra per month | +$115.94 |
| Extra interest paid over 30 years | $22,908.24 |
Paying stamp duty upfront saves you $22,908.24 in interest over the life of your loan.
Calculate a Different Amount
Frequently Asked Questions
How much is stamp duty on a $450,000 house in South Australia?
Stamp duty on a $450,000 property in South Australia is $18,830.00 for a standard buyer (2025-26 rates). This is an effective rate of 4.18%.
Do first home buyers pay stamp duty in South Australia?
At $450,000, first home buyer concessions in South Australia do not reduce stamp duty below the standard amount of $18,830.00. The property value exceeds the concession threshold.
What are the total costs of buying a $450,000 property in South Australia?
The total estimated cost is approximately $471,330.00, which includes the purchase price ($450,000), stamp duty ($18,830.00), legal/conveyancing fees (~$2,000), and building/pest inspections (~$500).
Frequently asked questions
How much stamp duty do first home buyers pay in NSW?
First home buyers in NSW pay no stamp duty on homes up to $800,000, a concessional rate on homes between $800,001 and $1,000,000, and full stamp duty above $1,000,000. The First Home Owner Grant adds $10,000 for new homes up to $600,000. Source: Revenue NSW.
How much stamp duty do first home buyers pay in Victoria?
First home buyers in Victoria pay no stamp duty on homes up to $600,000 and receive a sliding concession on homes between $600,001 and $750,000. A $10,000 First Home Owner Grant applies on new homes up to $750,000. Source: State Revenue Office Victoria.
Do foreign buyers pay extra stamp duty in Australia?
Yes. Foreign buyer surcharges apply in most states: 8% in NSW and Victoria, 7% in Queensland, Western Australia, and South Australia. These are additional to the standard stamp duty and First Home Buyer concessions do not apply to foreign buyers.
Is stamp duty payable on off-the-plan purchases?
Off-the-plan concessions vary by state. Victoria removed the concession in 2017 for owner-occupiers. NSW retained an off-the-plan concession for principal places of residence under certain thresholds. Always check the current rules with the relevant state revenue office.
General information and estimates only — not financial, tax, or legal advice. Always verify with a licensed adviser or the ATO.
Related reading
$31,335 on a $800K home, but first home buyers pay $0 under $800K. Full NSW stamp duty rates, exemptions, and calculator for 2025-26.
Stamp Duty in Queensland 2025-26: Rates, Thresholds & Exemptions$21,850 on a $700K QLD property. First home buyers get concessions up to $550K. Full transfer duty rates, thresholds, and foreign buyer surcharges.
NSW Stamp Duty 2026: $31,335 on $800K (First Home Buyers: $0)An $800K property costs $31,335 in NSW stamp duty in 2026 — but first home buyers pay $0 under $800K. See the exact figure for any price plus FHB exemption thresholds.
Stamp Duty in Victoria 2025-26: Rates, Concessions & Changes$44,000+ on a $800K VIC property. First home buyers save up to $33,250 on homes under $600K. Full Victorian stamp duty rates and concessions.