Property-backed

Fast second mortgage business loans

Fast second mortgage business loans in Australia: borrow against equity without refinancing your home loan, with $20k to $250k possible same day.

Updated 24 October 2026 · Instant Business Funder editorial team

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A building set behind trees, property with equity available for a second mortgage

Quick answer

A second mortgage business loan lets you borrow against the equity in a property while keeping the existing first mortgage in place. The new lender's security ranks behind your current lender. It suits owners who don't want to refinance a good home or commercial loan, and it can be quick: $20k to $250k is possible same day (property-secured) once the valuation, title checks and signing are complete.

Key points

  • Keeps your existing home or commercial loan untouched.
  • Borrows against the equity left after the first mortgage.
  • $20k to $250k possible same day (property-secured).
  • Usually short-term, with a clear plan to repay or refinance.
Amount
From $20,000, limited by available equity
Security
Second-ranking mortgage over property
Speed
$20k to $250k possible same day (property-secured)
Purpose
Business purposes only

Plenty of business owners have a home loan they’re happy with and a decent amount of equity built up behind it. When the business needs money quickly, refinancing that home loan feels like the wrong answer: it takes time, might cost break fees and could leave you on a worse deal. A second mortgage solves that by lending against the equity without touching the first loan.

For speed, it’s one of the most useful tools in business lending. $20k to $250k is possible same day (property-secured) when the property is straightforward and everyone involved is ready to sign.

How a second mortgage business loan works

Your existing lender stays in first position. The new lender registers a second mortgage behind them. If the property were ever sold, the first lender would be repaid first, then the second lender, and anything left would be yours. Because the second lender is further back in line, they look closely at how much equity is left after the first loan.

Example property Amount
Estimated value $1,000,000
Owing on first mortgage $450,000
Equity $550,000
Possible second mortgage A portion of that equity, leaving a buffer

The exact amount depends on the property type, location, the first loan’s terms and the lender’s own limits.

When a second mortgage is the right fit

  • You don’t want to refinance a good existing loan.
  • You need it fast, and a full refinance would take weeks.
  • The need is short, such as bridging a gap until a contract pays or a property sells.
  • The business’s paperwork is behind, so an unsecured lender would need more time.
  • There’s a credit issue that makes unsecured lending harder.

If the amount is large, or you’re open to refinancing, a first mortgage might be cheaper. If it’s very short and urgent, compare it with a caveat loan.

What can slow a second mortgage down

  1. First lender consent. Some mortgages require the first lender to agree. We check this on day one.
  2. The first loan’s balance. A current statement or balance confirmation is needed.
  3. Signatures. Everyone on the title signs, including a spouse or partner if they’re a co-owner.
  4. Valuation. Standard homes are quick; unusual properties take longer.

An illustrative example

A Wollongong electrical contractor has a supplier invoice of $120,000 due for switchboards on a big commercial job, but the builder’s progress payment isn’t due for five weeks. The owner’s home is worth about $1.2 million with $500,000 owing on a home loan he’s happy with. A second mortgage for $130,000 is arranged with the first lender’s position confirmed the same morning, and funds are paid straight to the supplier that afternoon. When the progress payment arrives, the second mortgage is paid out.

Costs to weigh up

Second mortgages are priced higher than first mortgages because of the extra risk. That’s why they work best for short, specific needs where speed or keeping your first loan matters. Compare:

  • The total dollar cost of the second mortgage over the time you’ll hold it.
  • The cost and time of refinancing your first loan instead.
  • The cost of not funding the need, such as a lost discount, a penalty or a missed contract.

Using a second mortgage alongside an unsecured loan

Sometimes the best answer isn’t one loan but two. A business might take a smaller unsecured loan to cover something urgent today, and a second mortgage for the larger amount once the valuation is back. Or it might use a second mortgage for a one-off cost and keep a line of credit for day-to-day swings. Splitting the need this way can mean the urgent part lands faster and the larger part costs less, because each piece is matched to its own purpose and timing.

The important thing is that the combined repayments still fit. Add up every repayment the business will have, including the first mortgage on the property, any equipment loans and the new funding, and check it against your quietest month. If it’s tight, a longer term on the second mortgage or capitalised interest for a short period can ease the pressure while the purpose of the loan starts earning.

Need a second mortgage for your business quickly?

Tell us the amount, the deadline, the property and what’s owing on it. Enquiring costs nothing and doesn’t mean a credit check. Your details aren’t fired off to a panel of lenders either. A real person looks at the numbers and calls you, usually the same day.

Please be accurate on the form about the property’s value and the existing loan balance, because they decide how much is possible. Start your enquiry.

Frequently asked questions

What is a second mortgage business loan?

It's a loan for business purposes secured by a mortgage that ranks behind your existing one. Your current lender keeps first position, and the second lender is repaid after them if the property is sold.

Does my first lender need to agree?

Sometimes. Some first mortgages require consent before a second mortgage is registered. Where consent is needed, it can slow things down, so we check this early.

How much can I borrow on a second mortgage?

It depends on the property's value, what's owing on the first mortgage and how much buffer the lender needs. Most second mortgages are smaller than first mortgages because they rely on the remaining equity.

Why are second mortgages more expensive?

The second lender takes more risk because the first lender is repaid first. That's reflected in pricing. Second mortgages are best for shorter needs where speed or keeping the first loan is worth the extra cost.

Can I use a second mortgage to pay an ATO debt?

Yes, clearing tax debt is a common use. Compare the total cost with an ATO payment plan before deciding.

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