Bridging finance and a second mortgage both let you borrow against existing property equity, but they are structured for very different situations. Bridging is short-term and fast; a second mortgage is longer-term and cheaper. This article compares them on structure, cost, speed and use case so the right tool is clear. For broader context, see what is bridging finance.
Quick definitions
Bridging finance: short-term funding (1 to 12 months) that covers a defined gap between two transactions, repaid from a known exit event such as a property sale, refinance, or incoming settlement.
Second mortgage: a longer-term loan (1 to 5+ years) secured by a registered mortgage that sits behind your existing first mortgage on the same property. The first mortgage gets paid first if the property is sold; the second mortgage gets paid after.
Structure: how each one is set up
Bridging is typically secured by a registered mortgage (sometimes a caveat for speed-priority deals) and is structured around a specific exit event. The loan documents include the exit assumption (sale, refinance, incoming settlement) and the lender prices the deal against that exit.
A second mortgage is set up as a standalone loan with its own term, repayment schedule, and rate. There is no specific exit event assumed - the second mortgage is its own long-term arrangement that gets repaid through scheduled instalments or refinance at maturity.
Both require the existing first mortgagee to consent (or at least be aware) because both create an additional encumbrance on the property.
Speed: how fast each one settles
Bridging finance can settle in 1 to 3 weeks for a registered mortgage structure, or 2 to 7 days for a caveat-style bridging loan. The speed comes from streamlined assessment focused on the exit rather than long-term serviceability.
A second mortgage typically takes 4 to 8 weeks. The lender runs full long-term serviceability analysis (will you be able to make the monthly payments for the next 3 to 5 years?) and requires the same level of documentation as a first mortgage.
If you need money this month, bridging wins on speed. If you have 6 to 8 weeks available, the second mortgage timeline is fine.
Cost: rate, fees, total
Bridging finance rates typically run 8 to 18 per cent per annum (capitalised, with no monthly payments during the term). Establishment fees commonly 1 to 3 per cent of the loan amount.
Second mortgage rates typically run 8 to 12 per cent per annum (paid monthly). Establishment fees 0.5 to 2 per cent of the loan amount.
On the headline rate, the two products often look similar. The total cost depends on the term. A 6-month bridging loan at 14 per cent capitalised costs roughly 7 per cent of principal for the full 6 months. A 5-year second mortgage at 10 per cent paid monthly costs much more in total dollars but each individual instalment is smaller and the rate compounds over a longer base.
The honest comparison: bridging is more expensive per month but cheaper in total dollars for a 6-month need. A second mortgage is cheaper per month but more expensive in total dollars across a multi-year term.
When bridging fits
When you have a defined short-term need (1 to 12 months) with a clear exit event:
Buying a new property before selling an existing one.
Settling a business acquisition before long-term acquisition finance is in place.
Funding a development completion before refinance into long-term commercial debt.
Bridging a tax or grant settlement that is coming but not yet landed.
When a second mortgage fits
When you have a longer-term need (1 to 5+ years) for which monthly serviceability is realistic:
Raising additional capital for business growth without disturbing your existing first mortgage.
Refinancing other expensive debt (credit cards, unsecured loans) at a cheaper secured rate.
Funding a renovation or improvement to the secured property.
Providing a deposit for an investment property purchase elsewhere.
The wrong-tool warning
Using bridging when you should have used a second mortgage burns money. The bridging rate compounded across 3 to 5 years is dramatically more expensive than a second mortgage at a similar rate, because bridging is priced for short-term risk and is not designed to roll for years.
Using a second mortgage when you should have used bridging means waiting 8 weeks for settlement when you needed money in 2 weeks. The opportunity cost (the deal you cannot complete, the price you have to pay for delay) often exceeds the saved interest.
For the wrongest-tool warnings on both, see the bridging finance article: what is bridging finance, and when does it make sense.
Where to from here
We arrange both bridging finance and second mortgages across our panel of specialist lenders. No fees to clients; the lender pays us when finance settles. We will tell you honestly which structure suits your specific situation. Book a 20-minute brief to talk it through.
Want to talk specifics?
Twenty-minute brief, no obligation.
A real broker on the other end of the line. No fees to clients.
