Second mortgage business loans: borrow without touching your home loan

You’ve got a perfectly decent home loan. You don’t want to blow it up. But there’s equity sitting above it, and the business needs money. Enter the second mortgage.

It’s one of the most practical tools in business lending, and one of the most misunderstood. Let’s clear it up.

How does a second mortgage business loan work?

Picture your property’s value as a stack:

1. Bottom layer: your existing first mortgage. It stays exactly as it is.
2. Middle layer: the new second mortgage, secured behind the first.
3. Top layer: the equity buffer the lender leaves untouched.

If the property were ever sold to repay debts, the first lender is paid first and the second lender next. Because the second lender is further back in the queue, it takes on more risk, and that’s reflected in pricing and terms. Second mortgage business loans fall within the $20,000 to $5,000,000 property-secured range.

When does a second mortgage beat refinancing?

Situation	Second mortgage	Refinance the first
First loan has great terms you’d lose	Keeps them	Loses them
Break costs on the first loan	Avoided	May apply
Need is short-term with a clear exit	Strong fit	Often overkill
Need is large and long-term	Possible	Often better
Credit has slipped since the first loan	Often workable	Can be harder

There’s no universal winner. The right answer depends on the size of the need, how long you need it and what the first loan looks like.

Quick check-in: know what’s owed on your first mortgage? That’s half the maths done. Start your enquiry in 60 seconds, no credit check, and we’ll do the rest of the sums with you.

What does a second mortgage cost?

We don’t publish rates, because every loan is priced on its own facts. What we do say: compare the total cost of finance in dollars over your actual term. A second mortgage might involve:

• interest or loan cost for the term;
• an establishment or application fee;
• valuation and legal costs;
• a fee for discharging the mortgage at the end;
• any early repayment cost.

Ask for all of it as one dollar figure. Our guide to the total cost of finance shows how to line two offers up properly.

Repayment reality check (illustrative)

A made-up builder needs $180,000 for 9 months to finish a project while waiting on a final payment. The quote’s total cost of finance is $21,600.

• Repaid evenly: about $22,400 a month, plainly too heavy for most cash flows.
• Cost during the term, principal at the end: about $2,400 a month, then $180,000 repaid when the final payment lands.

This is the classic second mortgage pattern: light running cost, with a lump-sum exit tied to a real event. The exit has to be genuine. “Hopefully we’ll have it by then” isn’t an exit.

Common uses we see

• Clearing an ATO debt before it grows. The ATO confirms general interest charge incurred from 1 July 2025 is no longer tax-deductible, which makes lingering tax debt pricier. See tax debt business loans.
• Bridging a gap between a big job and its payment.
• Funding stock or a fit-out ahead of a busy season.
• Consolidating several expensive short-term business debts into one.
• Buying out a business partner.

What our expert will ask you on the call

• Who holds your first mortgage and what’s the balance?
• Roughly what’s the property worth?
• Who’s on the title, and are they on board?
• What’s the money for and how long do you need it?
• What’s your exit, and when does it happen?

A word on disputes

ASIC notes that lenders who only provide commercial loans don’t have to hold a credit licence or belong to AFCA, so it’s worth knowing who you’re dealing with. Ask any lender whether it’s an AFCA member before you sign.

Second mortgage or caveat loan?

Both sit behind an existing first mortgage. They suit different jobs.

	Second mortgage	Caveat loan
How the lender is protected	A registered second mortgage	A caveat lodged on the title
Typical term	Months to a few years	Usually months
Setup	More documentation	Lighter documentation
Best for	A defined need that runs a bit longer	A short, sharp gap with a firm exit
First lender consent	Often needed	Depends on the first mortgage terms

If you’re unsure which one fits, describe the need and the exit on your enquiry. Our expert will tell you which structure suits, or whether something else does the job better. See caveat business loans for the short-term option.

Questions to ask before you sign a second mortgage

• What’s the total cost of finance in dollars over the full term, including setup, legal and discharge costs?
• Does my first lender need to consent, and who arranges that?
• What happens if my exit runs a month or two late?
• Can I repay early, and what would that cost at month six?

Ready to stack it up?

If you’ve got equity above your first loan and a clear purpose, a second mortgage business loan can fund the business without disturbing a home loan you’re happy with.

Begin with step 1. It’s about 60 seconds, there’s no credit check to enquire, we won’t scatter your details across a list of lenders, and one of our experts will call you. Please tell us honestly what’s owed on the property and what the money’s for, so we can find the right fit on the first go.