Borrowing behind your home loan

Second mortgages for business: what to know first

Before taking a second mortgage for your business: how they rank, first lender consent, costs, repayment options and planning the exit.

Updated 31 October 2026 · Capital At Call editorial team

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Quick answer

A second mortgage for business is a registered loan secured on your property behind an existing first mortgage, used to fund a business purpose without refinancing the first loan. Before proceeding, check whether your first lender requires consent, understand the total cost, choose between regular repayments or interest paid up front or capitalised, and plan how the loan will be repaid.

Key points

  • Sits behind your first mortgage on the title
  • Check first-lender consent requirements early
  • Repayments can be regular, or interest paid up front or capitalised
  • Plan the exit before you sign

A second mortgage is one of the most practical ways for a business owner to unlock property equity without touching an existing home loan. It is also a serious commitment. Here is what to understand before you go ahead.

How a second mortgage ranks

Your existing lender holds the first mortgage. The second mortgage is registered behind it. If the property is sold, the first lender is repaid in full first, and the second lender is paid from what remains. That ranking is why second lenders look closely at how much equity sits above the first loan.

Check the first mortgage

Some home loans include terms about further security on the property. They may require the first lender’s consent, or simply notification, before a second mortgage is registered. Find your loan documents or ask your lender. We check this at the start so it does not cause a delay later.

Work out the equity

Equity available = (property’s worth x lending ratio) - first mortgage balance

The property equity calculator does this with your own figures. Business second mortgages run from $20k to $5m, with no valuation needed.

Want a person to look at your numbers? The 60-second enquiry runs no credit check, and the person who reads it is the person who calls you back.

Choose a repayment structure

Structure Effect Suits
Regular repayments Balance reduces over time Steady trading businesses
Interest paid up front No repayments during the term Owners wanting certainty of cost
Interest capitalised Interest added to the balance Businesses waiting on a sale, refinance or recovery

Understand the full cost

Ask for the total amount repayable, including establishment, legal and discharge costs, and any fees for early repayment. Compare that with alternatives such as refinancing the whole loan. Our refinance vs top-up comparison covers the options.

Plan the exit

Before signing, write down how the loan will be repaid and roughly when:

  • Trading cash: regular repayments from the business.
  • Refinance: once financials or credit improve.
  • Sale: of the property or another asset.
  • A large receivable: a contract payment or settlement.

The term can usually stretch if the exit runs late, but costs continue. A realistic plan keeps the overall cost down.

Talk to everyone on the title

Every registered owner will need to sign. If a spouse or family member co-owns the property, make sure they understand what is being secured and why. Some may want independent advice. Our guide to using home equity for business covers the personal side.

Second mortgage or caveat?

A caveat loan can be quicker for short, urgent needs, and a caveat can later convert into a registered second mortgage. For longer terms, a second mortgage from the start is often cleaner.

An illustrative example

A gym owner wants $220,000 to open a second studio. His home is worth around $1.3m, with $560,000 owed on a home loan he is happy with. A second mortgage behind it, with interest capitalised for the first nine months while memberships build, funds the fit-out. The plan is to begin regular repayments once the new studio breaks even.

More on this topic

  • Second mortgage business loans: Second mortgage business loans let you borrow against equity without refinancing your first mortgage. How they work, costs, risks and exit planning.
  • Caveat loan vs second mortgage: Caveat loan vs second mortgage: how each secures business funding behind an existing loan, which is quicker, which suits longer needs and how to switch.
  • Using home equity to fund your business: Should you use your home equity to fund your business? How it works, the real risks, how to protect your family and how to decide whether it is right.
  • Refinance vs top-up for business funds: Refinance vs top-up to raise business funds against property: how each works, speed, cost and when a separate second mortgage beats both.

A quick glossary

  • Caveat: a formal warning recorded against a land title, telling anyone who searches it that a lender claims an interest in that property.
  • Second mortgage: a mortgage registered after the home loan already on the title, so it is paid out second if the property sells.
  • First mortgage: the senior mortgage on a title, which takes priority over any later loans secured on the same land.
  • Capitalised interest: interest that rolls into the balance owing rather than leaving your account each month.

Check these before you commit

  • How much lands in my account after any fees are deducted?
  • What is the total repayable, and over what period?
  • Is the repayment schedule weekly, fortnightly or monthly?
  • What property or assets will be secured?
  • What are my options if trading dips during the term?

Who else to talk to

Funding decisions often have tax, legal or family consequences. Talk to your accountant about how repayments, interest and any asset purchases will be treated, and to a lawyer if property, guarantees or a change of structure are involved. Getting advice before you sign is far cheaper than unwinding a decision afterwards, and it usually makes the application stronger too.

Quick recap

  • Sits behind your first mortgage on the title
  • Check first-lender consent requirements early
  • Repayments can be regular, or interest paid up front or capitalised
  • Plan the exit before you sign

What happens when you enquire

After you enquire, a real person picks up your details and calls to talk through the purpose, the timing and how the money will be repaid. Unsecured funding is assessed mainly on bank statements and turnover. Property-secured funding is assessed on the property, with no valuation required, and interest can be prepaid or added to the loan. You see the total cost before you commit, and the credit check only happens once you decide to proceed. If the timing is tight, tell us the deadline on the first call so the work can be planned around it.

Is funding the right answer here?

Ask yourself where the repayment will come from. A customer payment, the next peak season, a property sale or steady trading are all real sources. Hope is not. If you can point to the money that will clear the loan, and roughly when, funding is likely to help. If you cannot, talk to your accountant about the underlying numbers first.

A simple preparation list

A short checklist before you send the enquiry. None of it takes long, and together it heads off the most common causes of delay:

  • Know the amount you need and what it will pay for.
  • Check your recent bank statements so nothing in them surprises you.
  • Note any loans, leases or payment plans the business is carrying.
  • If you own property, know who is on the title and what is owed.
  • Make sure every director or co-owner knows you are applying.

Help us match you first time

The enquiry asks for the amount, the purpose, how long you have traded, your monthly revenue, your credit history, your state and whether you own real estate. Each answer steers your enquiry towards the right option. Accurate answers let the first call move straight to solutions. Rounded-up turnover or a credit history that turns out to be different from the form means starting again, which costs everyone time.

Let’s see what fits

Have a figure in mind? Put it in the enquiry. There is no credit check for asking, you will not be passed around a panel of lenders and you will speak to someone who has read your answers. Take a moment to get those answers right. Accurate details about revenue, time trading and credit mean we can match you properly first time, without the back and forth.

Frequently asked questions

Will my bank know about a second mortgage?

The second mortgage is registered on the title, and some first mortgages require the first lender's consent or notification. This is checked early.

How much can I borrow on a second mortgage?

It depends on the property's worth, what is owed on the first mortgage and the lending ratio. Business second mortgages run from $20k to $5m.

Is a valuation required?

Not for the second mortgages we arrange.

What happens if I sell the property?

The first mortgage is repaid first, then the second, from the sale proceeds.

Can I refinance a second mortgage later?

Yes. Many owners refinance into a single loan once the business has stabilised.

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