Property Transfers Between Siblings: A Stamp Duty Valuation Guide for Western Sydney

If you and a sibling have ended up owning a property together — whether you inherited it from your parents, bought it as an investment years ago, or one of you is buying the other out of the family home — you’ll eventually hit the same question: what happens with stamp duty?

Most people assume that because it’s “just family,” the tax office won’t care much. That assumption catches a lot of Western Sydney families out. Transferring a share of a house from one sibling to another is treated, for duty purposes, almost the same as selling it to a complete stranger. The one difference that trips people up is this: because you’re related, you can’t just agree on a number between yourselves. Revenue NSW generally wants an independent, professionally prepared valuation before it will accept what the property is worth.

This guide walks through how stamp duty applies to sibling transfers in NSW, why an independent property valuation for duty purposes matters, what it actually costs, and the mistakes that tend to cause the most grief. 

Getting Your Stamp Duty Valuation Right in Western Sydney

Here’s the bit that surprises most people: stamp duty (technically called transfer duty in NSW) is assessed on the dutiable value of the property, which is whichever is higher — the price actually paid, or the property’s market value. If you gift your share to your brother, or sell it to your sister for a token $1, Revenue NSW still calculates duty as if the property changed hands at full market value.

Because you and your sibling are related parties, the transaction may fall within the situations that require a duty valuation or other supporting evidence of market value for Revenue NSW purposes. Under Revenue Ruling DUT 012, a formal valuation is required whenever:

• there’s no consideration for the transfer (it’s a straight gift)
• consideration is non-monetary
• the parties are related or associated
• there’s no selling agent involved
• the same solicitor or conveyancer acts for both of you, or
• Revenue NSW isn’t satisfied the price paid reflects the property’s true value

Sibling transfers tick at least one, and usually several, of these boxes. That’s why a stamp duty valuation from a suitably qualified, independent valuer isn’t optional paperwork — it’s the evidence Revenue NSW relies on to check the duty has been calculated correctly. This is where a lot of Western Sydney families go wrong: they use an agent’s appraisal or an old bank valuation, and the transfer gets held up or duty gets reassessed.

What makes a valuation acceptable to Revenue NSW

Under Revenue Ruling DUT 044, an acceptable valuation needs to:

• be prepared by a suitably qualified valuer (not a real estate agent)
• reflect the property’s market value in its current condition
• be dated at, or close to, the actual date of transfer
• confirm that a physical inspection of the property took place

A desktop estimate or a figure pulled from a property data website won’t cut it if Revenue NSW asks for evidence.

Do Siblings Get Any Stamp Duty Exemption?

This is the misconception that causes the most confusion. Spouses and de facto partners get a specific exemption when transferring the family home between themselves in equal shares. Siblings don’t get an equivalent exemption. Unless one of the situations below applies, duty is payable on the full market value of whatever share is changing hands.

Genuine exemptions or concessions that can apply to siblings are narrow:

• Deceased estates. If a property passes to siblings as named beneficiaries under a will (or under the rules of intestacy if there’s no will), that initial transfer from the estate is generally exempt, or attracts only a nominal duty. A qualifying transfer from the estate directly to a beneficiary may attract the $100 concessional transfer-duty rate; this treatment does not automatically extend to a later transfer between siblings after they already own the property.
• Family farms. Transfers of land genuinely used for primary production between family members, including siblings, can qualify for an exemption — but this is specific to farming and rural land, not the family home or an investment property.
• Court orders or binding agreements following a relationship breakdown. This applies to spouses and de facto partners, not siblings, though it’s a common source of confusion when a sibling transfer happens around the same time as a divorce settlement.

Outside of these, a straightforward transfer where one sibling buys out another, or where a share is gifted, is fully dutiable.

A Practical Example

Say two siblings inherit their late parents’ house in Parramatta as equal owners. A few years later, one sibling wants to keep the house and buy out the other’s half. They agree on a below-market price to keep things simple between family.

Revenue NSW will still assess duty on the dutiable value of the half-share being transferred — and because the price was negotiated informally between siblings, they’ll need an independent valuation to establish what that half-share is actually worth on the open market. Duty is then calculated on the higher of the agreed price or that valuation, using the current NSW transfer duty rates.

Current NSW Transfer Duty Rates

Transfer duty in NSW is calculated on a sliding scale, based on the dutiable value of the share being transferred. The general rates for the 2026/27 financial year are:

Dutiable value	Duty payable
$0 – $18,000	$1.25 per $100 (minimum $20)
$18,001 – $38,000	$225 plus $1.50 per $100 over $18,000
$38,001 – $103,000	$525 plus $1.75 per $100 over $38,000
$103,001 – $387,000	$1,662 plus $3.50 per $100 over $103,000
$387,001 – $1,290,000	$11,602 plus $4.50 per $100 over $387,000
Over $1,290,000	$52,237 plus $5.50 per $100 over $1,290,000

These thresholds are indexed each year, so it’s worth checking the current figures on the Revenue NSW website or with your conveyancer before settling on a number, especially if your transfer straddles a new financial year.

Beyond Stamp Duty: What Else to Factor In

Duty is usually the biggest upfront cost, but it’s rarely the only one. A few things worth raising with your accountant and conveyancer before you transfer anything:

• Capital gains tax (CGT). If the property isn’t your sibling’s main residence, the ATO can apply a similar “market value substitution” rule to CGT — meaning a low sale price between siblings doesn’t necessarily reduce the taxable gain.
• Existing mortgages. If there’s a loan secured against the property, the lender will usually need to consent to any change in ownership, and the remaining owner may need to refinance in their own name.
• Land tax. Depending on the property’s value and how it’s used, the new sole owner’s land tax position can change once they hold 100% of the title rather than a half-share.
• Legal documentation. Family transfers are typically done via a Memorandum of Transfer rather than a standard Contract for Sale, and duty is still payable even without a contract.

Why an Independent Valuation Protects Everyone

Beyond satisfying Revenue NSW, a proper valuation is also good practice for the family relationship itself. When siblings set a price between themselves, it’s easy for one party to later feel the figure was too generous — or too stingy — especially if the property’s value has moved since it was last assessed. An independent valuation, done by someone with no stake in the outcome, gives both siblings a defensible, evidence-based number that isn’t coloured by sentiment or old expectations about who “deserves” what.

It also creates a clean paper trail if the ATO or Revenue NSW ever queries the transaction down the track, which matters more than most families expect, since these records can resurface years later when the property is eventually sold.

Frequently Asked Questions

Do we have to pay stamp duty if no money is changing hands?

Yes, in most cases. Revenue NSW calculates duty on market value regardless of whether the transfer is a gift, a sale, or somewhere in between.

Can we just agree on a price between ourselves instead of getting a valuation?

You can agree on a price, but because you’re related parties, Revenue NSW will generally still require an independent valuation as evidence that the price reflects true market value.

Is transferring an inherited property between siblings the same as inheriting it in the first place?

No. The transfer from a deceased estate to the named beneficiaries is usually exempt or attracts nominal duty. A later transfer between siblings who already co-own the inherited property is a separate, generally dutiable transaction.

Does it matter if the property is in Western Sydney specifically?

Duty rates and rules are set at the state level, so the same NSW rules apply whether the property is in Parramatta, Penrith, Blacktown or anywhere else in the state. What differs locally is market value, which is exactly why a valuer familiar with Western Sydney suburbs can be useful.

Are the rules different in other states?

Yes. Stamp duty and family transfer exemptions vary between states and territories, so if the property is outside NSW, check the relevant state or territory revenue office for their specific rules.

How long does a valuation take?

It varies by property and valuer availability, but a typical residential valuation usually involves a site inspection followed by a written report within a matter of business days.

Summary

Transferring property between siblings in NSW is treated as a dutiable transaction in almost all cases, whether the transfer is a gift, a below-market sale, or a straightforward buyout. The main exemptions that exist — for spouses, deceased estates, and family farms — generally don’t extend to ordinary sibling transfers.

Because siblings are related parties, Revenue NSW typically requires an independent, suitably qualified valuation rather than accepting a price agreed between family members. Getting that valuation right, from someone familiar with current Western Sydney property values, is what determines the duty payable and protects both siblings if the figure is ever questioned later. Before proceeding, it’s worth speaking to a conveyancer or solicitor about the paperwork, and an accountant about any CGT or land tax consequences, alongside arranging a proper valuation.

Getting the Valuation Sorted

Property transfers between siblings usually move fastest, and with the least friction, when everyone is working from the same independent number. Western Sydney Valuations prepares valuations for stamp duty and family transfer purposes across Western Sydney, based on a physical inspection and current local market evidence.

If you’re planning a transfer and need a valuation Revenue NSW will accept, call Western Sydney Valuations on +61 438 080 786 to talk through what’s involved for your situation.