Quick answer: When you transfer an asset to your ex under a court order or binding financial agreement, no CGT is payable at the moment of transfer — the relationship breakdown rollover (section 126-5) defers it. Your ex inherits your cost base and your acquisition date, and pays the CGT later when they sell. It is a deferral, not a cancellation — and it only works with a formal agreement. A handshake split gets no rollover at all.
This guide walks through how the rollover works, the traps that catch separating couples, and two fully costed 2026-27 examples showing the tax each side actually ends up paying. Run your own numbers any time with our CGT calculator.
How the relationship breakdown rollover works
Normally, transferring an asset to someone else is a CGT event — a disposal, taxed at market value. Separation is the big exception. If the transfer happens because of one of the qualifying agreements below, section 126-5 of the tax law applies a same-asset rollover:
- The transferor (the one giving up the asset) disregards any capital gain or loss — nothing goes in their return for the transfer itself.
- The transferee (the one receiving it) steps into the transferor’s shoes: they are treated as having acquired the asset at the same time and for the same cost base as their ex. When they later sell, the whole gain — including growth from before the split — is theirs to deal with.
Three details people routinely miss:
- It is mandatory. If the rollover applies, you cannot choose to trigger the gain early — say, to soak it up in a low-income year. The ATO is blunt about this: if the rollover applies to an asset, you must use it.
- You still declare it. The transferor reports the rollover in their tax return at the capital gains question — Yes at “Have you applied an exemption, rollover or additional discount?” and code S: Same asset roll-overs.
- The 12-month clock carries over. The transferee inherits the transferor’s ownership period, so if the couple held the asset for more than 12 months combined, the transferee qualifies for the 50% CGT discount on their eventual sale (see our 50% CGT discount guide).
The gatekeeper: no formal agreement, no rollover
This is the rule that destroys DIY settlements. The rollover applies only if the transfer results from:
- a court order under the Family Law Act 1975 (including consent orders), or a state, territory or foreign law relating to relationship breakdowns;
- an arbitral award under section 13H of the Family Law Act;
- a binding financial agreement (sections 90G or 90UJ) — which also needs a separation declaration to take effect; or
- certain state/territory binding agreements for separating couples.
Split the assets over a handshake, a text message, or a lawyer’s letter that never became a binding agreement, and the rollover does not apply. The transfer is treated as a normal disposal at market value, the gain lands in the transferor’s tax return for that year, and the transferee is treated as acquiring the asset at the time of transfer. A $500,000 investment property moved informally can easily crystallise a six-figure taxable gain on the spot.
One more condition for binding financial agreements: at the time of transfer the spouses must be separated with no reasonable likelihood of getting back together, and the transfer must be directly connected with the breakdown. A transfer planned years earlier for other reasons doesn’t qualify.
What the transferee inherits: cost base, dates and the family home
When you receive an asset under the rollover, you inherit two things:
1. The cost base. You get the transferor’s cost base at the time of transfer as the first element of your own cost base — not the market value on the day you received it. You then add the costs of the transfer itself (conveyancing, and any stamp duty you actually pay — though family-law transfers are usually exempt or concessional depending on the state) plus any later capital costs you incur that aren’t deductible. General family-law legal fees do not get added. Getting the transferor’s full cost-base records — original purchase price, buying costs, improvements, depreciation claimed — is one of the most important parts of the settlement paperwork. Our cost base guide shows exactly which elements count.
2. The acquisition date and the use history. You are treated as having owned the asset since your ex acquired it. For the main residence exemption, you look at how both of you used the property across the combined ownership period. So if the family home was the couple’s main residence from purchase until the transfer, and you keep living there, the exemption continues seamlessly and a later sale is fully CGT-free (see our main residence exemption guide).
Now the myth that needs killing: there is no automatic “2-year sell rule” after divorce. The 2-year disposal windows in the tax law (sections 118-140/118-195) apply to inherited dwellings from a deceased estate, not to divorce. After a relationship breakdown, the family home stays exempt only while the main-residence conditions are met. If you move out and rent it, the 6-year absence rule may still protect it — provided you don’t claim another main residence — but if you buy a new home and treat that as your main residence, the old property starts accruing a taxable gain.
Timing matters: when does the CGT event happen?
The date the CGT event happens depends on the instrument:
- Court order or arbitral award — the event happens when the asset is actually transferred, not when the order is made.
- Binding financial agreement — this may be a contract, in which case the event happens when the contract is entered into.
Why care? Because the financial year of the event determines the transferor’s return year, and the transferee’s acquisition clock (for the discount and for the pre-2027 gain treatment under the 1 July 2027 CGT reform) runs from the original acquisition date — a point in your favour, since pre-2027 gains keep the old 50% discount treatment.
Worked example 1: the investment property (where the real money sits)
Kate and Mark bought a Brisbane investment unit in 2015 for $420,000, 50/50. Buying costs (stamp duty, legal) were $15,000, so the property’s cost base is $435,000. They separate, and in March 2026 consent orders transfer Mark’s 50% to Kate. The rollover applies: Mark reports no gain, and Kate’s cost base for the whole property becomes $435,000 — plus her $5,000 in conveyancing costs for the transfer, taking it to $440,000.
Kate sells the unit in June 2027 for $680,000, paying $18,000 in agent fees:
| Step | Calculation | Amount |
|---|---|---|
| Capital proceeds | $680,000 − $18,000 selling costs | $662,000 |
| Less cost base | $435,000 + $5,000 transfer costs | $440,000 |
| Gross capital gain | $662,000 − $440,000 | $222,000 |
| 50% CGT discount | Held since 2015 — well over 12 months | −$111,000 |
| Net capital gain added to Kate’s income | $111,000 |
Kate earns a $95,000 salary. Her taxable income becomes $206,000, and the $111,000 gain is taxed at her marginal rates (2026-27 resident rates: 30% to $135,000, 37% to $190,000, 45% above, plus 2% Medicare levy):
- $40,000 of the gain falls in the 30% bracket → $12,000
- $55,000 falls in the 37% bracket → $20,350
- $16,000 falls in the 45% bracket → $7,200
- Medicare levy on the $111,000 → $2,220
Total extra tax: $41,770. That is the deferred bill Kate inherited — and the number the couple should have been negotiating around at settlement. Had they split the unit informally instead, Mark would have copped a taxable gain on his half in 2025-26 and Kate’s cost base would have reset to market value — a completely different (and usually worse) outcome.
Worked example 2: the family home (the easy one — if you play it right)
Same couple, different asset: their Sydney home, bought 2018 for $750,000, lived in as their main residence until separation. The court order transfers Mark’s interest to Kate, who keeps living there. She sells in 2028 for $920,000.
CGT payable: $0. The property was the couple’s main residence from purchase to transfer, and Kate continued living in it — the exemption covers the combined ownership period under the rollover. The $170,000 gain is entirely tax-free.
The contrast case: suppose Kate moves out after the order, rents the home for three years, and doesn’t claim another main residence. The 6-year absence rule can keep the sale fully exempt. But if she buys a new place and treats that as her main residence from day one, the old home’s exemption stops — and the gain gets apportioned between exempt and taxable days. That single decision, made in the emotional weeks after separation, can be worth tens of thousands in tax.
Worked example 3: a share parcel (short version)
Mark receives an ETF parcel under a binding financial agreement: bought by Kate in 2020 for $60,000, transferred 2026, sold by Mark in 2027 for $85,000. Gain $25,000; the 50% discount applies because the combined ownership period exceeds 12 months; $12,500 is added to Mark’s taxable income. At the 30% marginal rate plus 2% Medicare levy, that’s about $4,000 in tax. Model it in seconds on our CGT calculator.
Common mistakes that cost separating couples real money
- Splitting assets informally. The handshake deal is the single most expensive mistake on this list — no rollover, market-value disposal, gain taxed immediately.
- Thinking the rollover wipes the CGT. It defers it. Someone always pays; the only question is who, and when.
- Believing in the 2-year rule. There is no automatic post-divorce grace period. Continued main-residence status is what protects the family home.
- Forgetting the rollover is mandatory. You can’t opt out to crystallise a gain in a low-income year — even if that would be smarter.
- Not declaring the rollover. Code S in the transferor’s return. Skipping it invites an ATO “please explain”.
- Confusing debt with CGT. Refinancing to pay out your ex has no CGT effect — mortgage debt is not consideration for CGT purposes. The tax follows the asset, not the loan.
- Valuing the settlement without the deferred tax. Whoever takes the appreciating investment asset takes the embedded tax bill (Example 1: $41,770). Settlements that ignore this systematically overpay one side.
- Losing the cost-base records. Without the transferor’s original purchase documents, improvement receipts and depreciation history, the transferee overstates the gain — sometimes by tens of thousands.
- Assuming the 2027 reform won’t touch the deferred gain. Gains accruing before 1 July 2027 keep the old 50% discount, but growth after that date falls under the new indexation + 30% minimum tax regime. Factor this into settlement timing.
Your separation CGT checklist
- Get a court order, consent order or binding financial agreement in place before assets move — the instrument is what unlocks the rollover.
- Collect the transferor’s complete cost-base records: purchase contract, stamp duty, legal fees, improvement invoices, depreciation schedules.
- Note the exact acquisition date (the transferee inherits it) and the CGT event date for each transfer.
- Transferor: declare the rollover (code S) in the relevant year’s tax return.
- Model the deferred tax on each asset before agreeing the split — price the tax into the settlement.
- If the family home is involved, decide the main-residence strategy deliberately: who lives there, whether the 6-year rule is in play, and when (if ever) a second property becomes someone’s main residence.
- Super splitting is a separate matter: ordinary super splits aren’t CGT events at transfer (only SMSF asset transfers can trigger the rollover rules) — get specialist advice before touching super.
- If the transferor dies before the split is complete, the rollover can’t apply to transfers to their estate — settle while both parties are alive.
Frequently asked questions
Do I pay CGT when I transfer my share of the house to my ex?
Not at the time of transfer, provided it’s under a court order, consent order, arbitral award or binding financial agreement — the rollover defers the gain to your ex. You must still declare the rollover in your tax return.
We split everything ourselves without going to court. Is it still tax-free?
No. Private or informal agreements don’t qualify. The transfer is treated as a market-value disposal, any gain goes in your return for that year, and your ex acquires the asset at the transfer date with a fresh cost base.
Does the rollover cancel the CGT or just delay it?
Just delays it. The transferee inherits your cost base and acquisition date, so the full gain — including growth from before the split — is taxed when they eventually sell.
How does the 50% CGT discount work after a divorce transfer?
The transferee inherits the transferor’s ownership period. If the couple held the asset for more than 12 months combined, the transferee qualifies for the discount on their later sale (for gains accruing before 1 July 2027; the 2027 reform changes the rules for later gains).
My ex moved into our investment property after the split. Is the gain wiped?
No — moving in doesn’t erase the past. The gain is apportioned: the investment-property years stay taxable, and only the period it was genuinely the main residence (plus eligible absence periods) is exempt. See our guide to CGT on property for the apportionment method.
Will the 1 July 2027 CGT reform affect my divorce transfer?
Possibly, on the timing side. The reform is prospective: gains accruing before 1 July 2027 keep the old 50% discount treatment, while growth after that date falls under indexation plus a 30% minimum tax. If the transferee plans to sell well after 2027, modelling the split under both regimes is worth doing before you sign.
The bottom line
CGT on divorce is not a tax you avoid — it’s a tax you reschedule. The s126-5 rollover takes the gain off the transferor’s hands and hands the whole thing, cost base and all, to the transferee. Used with a proper court order or binding financial agreement, it lets a separating couple divide assets without an immediate tax bill; used carelessly — or skipped because the split was informal — it becomes the most expensive clause nobody read. Know the deferred number before you sign, keep the cost-base records, and treat the family home decision as the tax decision it is.
