Buy → renovate → sell. Full math including stamp duty, holding costs, agent fees, and the tax trap most flippers miss: if the ATO classifies you as a property trader, your "capital gain" is actually ordinary income at full marginal rate, no 50% discount. This calculator runs both scenarios so you see the real number either way.
The full money path: Money goes OUT for purchase + stamp duty + costs + reno + holding costs + agent + marketing + conveyancing + tax. Money comes IN from sale only. Net profit is the difference. ROI is the profit divided by total cash you actually deployed (deposit + reno cost + costs covered by you).
The tax trap: The ATO looks at four things to decide if you're a property trader or a capital investor:
If you're a trader, the profit is ordinary income taxed at your marginal rate (up to 47% including Medicare). No 50% CGT discount applies. Plus the property is "trading stock" so different accounting rules apply — talk to your accountant before you start, not after.
Trading entity — the structural decision that changes the tax outcome by 20+ percentage points: The default is to flip in your personal name. For most active flippers, that's the worst choice. Here's the comparison:
When does each win?
Critical warning: The entity structure must be in place before settlement. Restructuring later — moving the property from personal name into a company or trust — triggers CGT and (in some states) stamp duty again. This is the most expensive mistake new flippers make. Get accountant + lawyer signed off before you exchange.
GST is the other trap: "New residential premises" (newly built or substantially renovated) attract GST on sale. That's 1/11th of the sale price gone — usually $50-100k on a typical flip. There's a margin scheme that can reduce this, but you have to elect it correctly and meet specific conditions. Get advice.
Costs flippers consistently underestimate:
The honest math: Most "successful" property flips that show up on social media work out at $20-50/hr after all-in costs and tax. That's not bad for a side hustle but it's not the get-rich-quick story it gets sold as. The ones that genuinely make 30%+ ROI in 6 months usually involve insider knowledge (estate sales, off-market deals via agents you know) or genuine value-add (subdivision, granny flat additions, change of use). Pure cosmetic reno flips rarely clear the tax + costs hurdle in current market conditions.
Money partner / JV flips (the "no money down" pitch): The promise is real but the math is brutal. A typical JV: you bring the deal and project management, your partner brings 100% of the capital. Your partner needs a hurdle return on their money first — typically 8-15% p.a. — and only what's left ("super profit") gets split with you. On a 6-month flip with $300k capital deployed, a 10% hurdle eats $15k off the top before any split. After that split (often 50/50), your share is often a fraction of what a solo flipper would clear. But your capital is $0, so your ROI on cash is technically infinite.
What the spruikers don't mention about JVs:
When JV flips actually make sense: You've done several solo flips successfully and have a track record to show. You source genuinely below-market deals. You have BA licensing or a structure that satisfies state regulation. Your partner is sophisticated, sees the structure clearly, and has appropriate risk tolerance. None of these are typically true for first-time flippers.
Better options to compare: