Using an investment property as second-mortgage security for your business

Why use an investment property rather than the family home?

For many households, the answer is emotional as much as financial: the family home stays out of the business. If the business hits a rough patch, the property at risk is the investment rather than the place the kids sleep. That separation can make the decision far easier to agree on at home.

There are practical advantages too. The investment property may carry more equity, particularly if it’s been held for a long time. It may be held in a single name, simplifying signing. And if the plan involves eventually selling it, the property can be both the security and the exit.

How does a lender look at a rented property?

Much as it looks at a home, with a few extra questions:

Factor	What the lender considers
Property type and location	Same as any residential valuation: comparable sales, condition, demand
The lease	Term remaining, rent, whether it’s periodic or fixed
The tenant	Reliability of rent payments, any arrears
Rental statements	Evidence of income if cash flow is part of the exit
Existing loan	Balance, limit, whether it’s interest only, repayment conduct

For commercial investment property, the lease carries more weight in the valuation itself. See second mortgages on commercial property.

How much can you borrow against an investment property?

The same combined LVR arithmetic applies: existing loan plus the new second mortgage, divided by value. Residential investment property usually falls in the same planning bands we use for homes; our equity and LVR calculator will show where yours sits.

A common complication is an interest-only first loan with a large balance close to its original amount. That’s fine, but it means less equity has built up through repayments, so recent price growth is doing most of the work. A conservative valuation matters here.

Would you rather leave the home out of it? Tell us about the investment property and we’ll see how far it goes.

Can the sale of the property be the exit?

Yes, and it’s one of the cleanest exits there is. A second mortgage bridges the business need now; the investment property is sold on your timeline, not in a rush, and both loans are repaid at settlement. The keys to making it work:

• Set the term with a margin for a full sale campaign and settlement period.
• Price realistically using recent comparable sales, not the peak of the market.
• Account for selling costs and tax. Agent fees and marketing come out of the proceeds. Capital gains tax may apply. The ATO explains that individuals and trusts that have owned an asset for at least 12 months can generally reduce the capital gain by 50%, while companies can’t use the CGT discount. Your accountant can estimate the net figure.

Our guide on selling versus borrowing against a property looks at the timing decision in more depth.

What about tax on the borrowing itself?

As a general principle, whether interest is deductible depends on what the borrowed money is used for, not on which property secures it. Money borrowed against a rental property but used in your business is a business borrowing. Get your accountant’s view on how to record it, particularly if the business is run through a separate entity.

Illustrative example: keeping the home out of it

A physiotherapy practice owner needs $220,000 to fit out a second clinic. The family home has good equity but the owner’s partner would rather not use it. The owner also holds a rented townhouse worth about $700,000 with $250,000 owing on an interest-only loan. A $220,000 second mortgage over the townhouse takes combined LVR to about 67%, in the workable band, with an exit of either clinic income or a sale of the townhouse within two years. All figures are illustrative.

If the townhouse alone had fallen short, adding a small second mortgage over the home to spread the security could have helped. See second mortgages over two properties.

What should you gather first?

• The current lease and a recent rental statement from your property manager.
• The investment loan statement, showing balance, limit and whether it’s interest only.
• A council rates notice and, for units, the latest strata levy notice.
• Contact details for your property manager, so the valuer can arrange access.

Is the tenancy affected at all?

In practice, no. The tenant keeps paying rent to you or your agent, and the lease continues as before. The only contact is usually a valuer’s inspection, arranged through your property manager with the notice your state’s tenancy rules require. If the plan is to sell, the usual rules for selling a tenanted property apply, and a fixed-term lease might affect timing or the pool of buyers. That’s worth factoring into the exit date.

Want to keep the family home out of it? Start here

If you’d prefer your investment property to carry the business borrowing, a specialist can tell you quickly whether it has enough equity to do the job alone. Enquiring takes about 60 seconds, and no credit check is done when you first enquire.

We don’t pass your details to a crowd of lenders. A single specialist reads your file and calls you back with a straight view. Please include the investment loan balance and whether it’s interest only; those two details shape the answer more than almost anything else.

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