Cross-Collateralisation Explained
What is cross-collateralisation, and should I avoid it when buying investment property?
By Andrew, franklenn FINANCE 7 min readUpdated 3 November 2026
The short answer
Cross-collateralisation is when one loan is secured by more than one property, or several properties secure several loans together with the same lender. It's often used when buying an investment with equity from your home. It can seem simpler, but it gives the lender more control: when you sell, refinance or borrow again, the lender can revalue all properties and decide how much of the sale proceeds to release. A standalone structure, where each property secures its own loan, usually gives investors more flexibility.
Detailed explanation
What it looks like
Say you own a home and want to buy an investment property using your equity. A crossed structure puts the new loan against both properties at once, so the lender holds a mortgage over the home and the investment as one combined security pool.
A standalone structure does the same job differently. One loan, usually a separate split against your home, releases equity for the deposit and costs. A second loan is secured only by the investment property. Same total debt, but each property stands on its own.
Many people don't realise they have a crossed structure until they try to sell or refinance. It's often set up at the time of purchase because it's the lender's default, and the paperwork can be easy to skim past when you're excited about buying.
Why lenders like it
Crossing gives the lender a bigger safety net. If one property falls in value, the other props up the security position. It can also mean one valuation process and a single set of documents, so it can look quicker at the time.
Occasionally crossing makes sense, for example in some construction or development scenarios. But for most everyday investors, the convenience upfront is outweighed by the inflexibility later.
It can also be offered when someone doesn't have quite enough equity in one property to cover a deposit, so the lender takes both as security to get comfortable. In that case it's worth asking whether there's a different way to structure the loans, or whether waiting a little longer would allow a cleaner setup.
The downsides for you
The main problems show up when you want to change something.
Imagine wanting to sell your investment to fund a new opportunity, only to find the lender has revalued your home lower than expected and wants a larger share of the sale proceeds to keep the remaining loan within its limits. In a standalone structure, the sale of one property generally doesn't depend on the value of the other.
- Selling: the lender may revalue every property and decide how much of the proceeds must go to reducing debt.
- Refinancing: moving one property to another lender can mean refinancing all of them.
- Borrowing again: a lower valuation on one property can reduce equity available across the whole portfolio.
- Fewer lender choices: you're more tied to one lender's policy and pricing.
Untangling an existing crossed structure
If your loans are already crossed, it can usually be fixed, though it takes a bit of work. Options include restructuring with your existing lender to separate the securities, or refinancing one or more loans to a new lender. Valuations, serviceability and fees all come into it, so we'd look at the numbers before recommending a path.
From our own experience owning property across NSW and QLD, keeping each property's lending separate has made it far simpler to sell, refinance or buy again on our own terms.
Before untangling, we'd look at your current valuations, how much each loan should be, whether you'd pass serviceability with a new lender and what fees or LMI might apply. Sometimes the best move is to restructure now; other times it's simpler to wait for a natural trigger, such as the end of a fixed rate period.
Worked example
Crossed versus standalone on a $620,000 investment purchase
An illustrative example. An owner's home is worth $810,000 with $455,000 owing. They buy a $620,000 investment property with about $31,000 in purchase costs, borrowing the full $651,000. Later they sell the investment for $655,000 with $17,900 in selling costs.
| Crossed: total debt ($455,000 + $651,000) | $1,106,000 secured by both properties |
| Crossed: combined security value | $1,430,000 |
| Crossed: combined LVR | 77.3% |
| Standalone: home loan plus equity split | $455,000 + $155,000 = $610,000 (75.3% LVR) |
| Standalone: investment loan | $496,000 (80% LVR) |
| Net sale proceeds ($655,000 - $17,900) | $637,100 |
| Standalone: after repaying $496,000 investment loan | $141,100 released to the owner |
| Crossed: amount released | Decided by the lender after reassessing the whole position |
With a standalone structure, the owner repays the investment loan and controls the remaining $141,100, which they might use to pay down the $155,000 equity split. With a crossed structure, the lender could revalue the home and hold back more of the proceeds. Figures are illustrative only.
Illustrative only. Figures are examples, not a quote or a recommendation.
Common mistakes
- Agreeing to cross properties because it seems quicker, without understanding the trade-offs.
- Not checking how your existing loans are secured before buying again.
- Assuming you can sell one crossed property and keep all the proceeds.
- Staying with one lender for every property and limiting future options.
Frequently asked questions
Next steps
Talk to franklenn FINANCE
If you'd like your current loan structure reviewed, or want to set up your next purchase cleanly, book a free discovery call with franklenn FINANCE.
This guide is general information only and does not consider your objectives, financial situation or needs. It is not financial, tax or legal advice. Lender policies, rates and government schemes change. Please speak with us, and with your accountant or solicitor where relevant, before acting.
