Quick answer
Both let a business borrow against equity behind an existing mortgage. A caveat loan relies on the loan agreement and a caveat on title, so it's lighter and usually quicker, and suits short terms with a clear exit. A registered second mortgage takes a little more paperwork and often the first lender's involvement, but it's a stronger security and better suited to longer terms or larger amounts.
Key points
- Choose on term first: short and certain points to a caveat, longer points to a registered second mortgage.
- A second mortgage is registered; a caveat records a claim based on the loan agreement.
- Your existing first mortgage stays in place with either structure.
- Set-up costs differ mainly in legal work and any first-lender involvement.
- Some deals start on a caveat and convert to a registered mortgage if the term stretches.
- Caveat loan term
- Short — usually months
- Second mortgage term
- Months to a few years
- Both secured by
- Residential or commercial property
- Both for
- Business purposes only
Owners who have equity behind a bank loan usually end up choosing between these two structures. They’re cousins rather than twins: both sit behind the existing mortgage, both are secured by property, and both are business lending. The differences are in what gets recorded on the title, how long the loan is meant to last and how much paperwork stands between you and the funds.
What’s the core difference on the title?
A registered second mortgage is a mortgage instrument lodged with the land registry and registered behind the first. In Queensland, for instance, the National Mortgage Form sits on the list of instruments that must be lodged electronically. Once registered, the second mortgagee has the rights that come with a registered mortgage.
A caveat loan doesn’t register a mortgage. The loan agreement charges the property, and the lender lodges a caveat to protect that charge. Western Australia’s Landgate lists “interest as equitable mortgagee” among the standard claims a caveat can record. The lender’s position is real, but it depends on the contract and the caveat rather than on a registered mortgage.
That single difference explains most of the others: why caveat loans are lighter, why they’re shorter and why lenders size them more conservatively. For the registry mechanics, see what a caveat on title does.
How do they compare feature by feature?
| Question | Caveat loan | Registered second mortgage |
|---|---|---|
| What’s on title? | Caveat recording the lender’s claim | Registered mortgage behind the first |
| Typical term | Short: weeks to months | Longer: months to a few years |
| Set-up | Loan agreement, guarantee if needed, caveat | Loan agreement, mortgage instrument, often first-lender involvement |
| Speed | Usually the quickest property-secured option | Quick, but more steps outside your control |
| Security strength for lender | Lower | Higher |
| Usual reason to choose | Deadline plus a clear, near-term exit | Longer runway or a larger amount |
When is a caveat loan the better choice?
Pick a caveat loan when most of these are true:
- The deadline is days away, not weeks.
- You can name the exit and roughly when it lands: a sale, a refinance, a big receivable, a tax refund.
- The amount is moderate relative to your equity.
- You’d rather not open up the first mortgage or wait for the first lender to respond.
A typical illustrative case: a builder is owed a progress payment in six weeks but has subcontractors to pay on Friday. There’s plenty of equity in a residential investment property with a modest bank loan. A caveat loan bridges the gap and is repaid from the progress payment.
When is a registered second mortgage the better choice?
Lean towards a second mortgage when:
- You need the money for longer than a short bridge — for example, a year or more while a business turns around.
- The exit is real but less certain in timing, like a refinance that depends on two more years of financials.
- The amount is large, and you want the security structure that supports it.
- Total cost over the full term matters more than shaving a day or two off settlement.
Unsure which column you’re in? The Caveat Loan Feasibility Checker weighs your term, amount and exit and points to the structure that may fit — or you can have a specialist look at it for you.
How do the costs compare in dollars?
Rather than compare headline pricing, compare the total dollar cost over the period you’ll actually have the loan. Put each quote into a simple table:
| Cost item | Caveat loan quote | Second mortgage quote |
|---|---|---|
| Establishment / application fee | $ | $ |
| Valuation | $ | $ |
| Lender’s legal and documentation costs | $ | $ |
| Registry lodgement and withdrawal / discharge | $ | $ |
| Interest and ongoing fees over your expected term | $ | $ |
| Early repayment or exit costs | $ | $ |
| Total cost of finance | $ | $ |
A caveat loan often costs less to set up and more per month; a second mortgage often costs more to set up and less per month. The shorter your realistic term, the more likely the caveat wins on total dollars. Our caveat loan costs page explains each line.
What about the existing first mortgage?
Neither structure touches your first mortgage. But your first mortgage contract might have something to say about both. Many bank mortgages contain a clause limiting other security over the property. With a registered second mortgage, the first lender usually becomes involved directly. With a caveat loan, it often doesn’t, but you should still know what your contract says. We cover this properly on borrowing when there’s already a mortgage.
Can you get either with bad credit or ATO debt?
Yes, both are available to borrowers with credit blemishes or tax debt, assessed case by case. The deciding factors are the equity, the property and the exit. If ATO debt is the reason you’re borrowing, our ATO debt page explains how lenders look at it.
Can a caveat loan and a second mortgage exist on the same property?
Yes, if there’s enough equity. A title might carry a first mortgage, a registered second mortgage and a caveat, each protecting a different lender. Each extra layer makes the next lender more cautious, because it sits further back in the queue if the property is sold. If your title already has a second mortgage, tell us upfront — it changes both the arithmetic and the structure we’d suggest. Our page on borrowing with an existing mortgage covers how layers stack up.
Not sure which structure fits your deadline?
You don’t need to decide on your own. Tell us the property, what’s owing on it, how much you need, by when and how you plan to repay, and we’ll tell you which structure makes sense — including when neither does.
It takes around 60 seconds, there’s no credit check to enquire, and your enquiry isn’t passed around a room of lenders. A real person works through it and calls you. Please give us real numbers for the value and existing debt, because they decide which column you land in.
Frequently asked questions
Which is faster, a caveat loan or a second mortgage?
Usually the caveat loan, because there's less to prepare and no registered mortgage to set up. A second mortgage can still move quickly, but it's more likely to involve the first mortgagee, which adds a step you don't control.
Is a second mortgage cheaper than a caveat loan?
Often, over a longer term, because the lender holds a stronger security. Compare the total dollar cost of each quote over your actual expected term, including set-up, valuation, legal and exit costs, rather than one headline number.
Does my bank have to agree to either?
Your first mortgage contract decides that. Many restrict further security. A registered second mortgage often needs the first lender's consent or a priority arrangement, while a caveat loan doesn't register a mortgage, but borrowing in breach of your bank's terms is still a risk to discuss before you sign.
Can I switch from a caveat loan to a second mortgage later?
Sometimes. If your exit takes longer than expected, a lender may offer to replace the caveat with a registered second mortgage. That's a new set of documents and costs, so it's better to pick the right structure at the start.
Which one is better with bad credit?
Both are assessed mainly on equity and exit, with credit history considered case by case. The structure choice should follow the term and amount, not the credit file.