A cash-out refinance — where you refinance your home loan and pull out a portion of your equity as cash — is one of the most misunderstood financial tools in Australia. Done poorly, it extends your debt and costs you a fortune. Done strategically with an offset account, it can be a powerful wealth-building move.
What Is a Cash-Out Refinance?
When your property has increased in value, you have built-up equity — the difference between what your home is worth and what you owe. A cash-out refinance lets you borrow against that equity, typically up to 80% of your property's value (to avoid Lenders Mortgage Insurance).
For example: your home is worth $900,000, you owe $550,000. Your equity is $350,000. At 80% LVR, you could refinance to a new loan of $720,000 — giving you $170,000 in cash.
Most people use that cash for renovations, investments, or paying off credit cards. But there's a smarter approach for homeowners focused on paying off their mortgage.
The Offset Playbook
Here's the key insight that most people miss: if you park the cash-out funds in your offset account, you pay zero extra interest on that money.
The maths: you've increased your loan by $170,000, but that $170,000 is sitting in your offset. Interest is calculated on (loan balance minus offset balance) = $720,000 - $170,000 - (original offset balance). You're no worse off on interest costs than before.
But now you have $170,000 in liquid cash that:
- Earns the equivalent of your mortgage rate (tax-free) by sitting in the offset
- Is fully accessible in an emergency
- Can be used as a lump sum to pay down the loan when your balance drops to that level
- Gives you negotiating power and financial security
⚠️ Important: This strategy only works if you have the discipline to leave the cash in the offset. If you spend it on lifestyle expenses, you've simply increased your debt with nothing to show for it.
When Does This Strategy Make Sense?
| Situation | Cash-Out + Offset? |
|---|---|
| You want liquidity but don't want to pay interest on the cash | ✅ Ideal |
| You're renovating to increase property value | ✅ Good use |
| You want to invest in shares or property | ⚠️ Consider carefully (tax implications) |
| You want to pay off high-interest debt | ✅ Often good (if you cut the cards) |
| You want to spend the cash on holidays or lifestyle | ❌ Don't do it |
The Costs You Must Factor In
Cash-out refinancing isn't free. Before doing it, make sure you've accounted for:
- Exit fees from your current lender (can be $0–$3,000+)
- Application/establishment fees with the new lender ($300–$600 typically)
- Valuation fees ($300–$600)
- Legal/conveyancing fees ($800–$1,500)
- LMI risk if you're borrowing above 80% LVR
- A higher loan balance means higher minimum repayments
Use our Refinance Calculator to model whether the new rate and terms make sense after all these costs.
The Long Game: The Crossover Point
Here's how the playbook ends beautifully: over the years, you make repayments and your loan balance gradually decreases. Meanwhile, your offset account stays high (because you never spent the cash-out funds).
Eventually — perhaps 10–12 years later — your loan balance drops to equal your offset balance. At that point, you're paying zero interest. You can then withdraw the offset funds, pay off the loan entirely, and own your home outright.
This is exactly the strategy that allows a $695,000 loan with $148,000 in offset to be completely paid off within 11 years at $5,000/month — without ever touching the offset funds until the final payoff.
Step-by-Step Checklist
- Get your property valued to confirm current equity
- Calculate your 80% LVR limit (to avoid LMI)
- Shop around for refinance rates — comparison sites like Canstar can help
- Use our Refinance Calculator to confirm the numbers work
- Ensure the new loan includes a 100% offset account
- On settlement, park the cash-out funds directly into offset
- Increase repayments above the new minimum if possible
- Leave the offset funds untouched and grow them over time
Model your own scenario
Use the Offset Calculator →