First mortgage vs Second mortgage
First mortgage vs second mortgage: priority on title, what each is used for, LVR and pricing differences, and how to choose between them.
A first mortgage is the senior secured loan on a property and is repaid first on any sale, refinance or enforcement. A second mortgage ranks behind the first and is repaid only after the first is cleared. First mortgages carry lower rates because the position is safer; second mortgages cost more but release additional capital without refinancing the first. The right choice depends on whether the borrower needs all new debt or just to add capital behind existing terms worth keeping.
Side-by-side
| Attribute | First mortgage | Second mortgage |
|---|---|---|
| Position on title | First-ranking registered mortgage | Second-ranking registered mortgage |
| Priority on sale or default | Paid out first in full | Paid out only after the first is cleared |
| Indicative rate (resi) | From 6.99% p.a. | Higher than the equivalent first |
| Max LVR (resi houses) | 70-75% | Combined up to 80% (first + second) |
| First-mortgage-holder consent | Not applicable | Usually required |
| Existing first mortgage | Refinanced or replaced | Preserved as-is |
| Typical use | New acquisition or refinance | Capital release behind existing first |
| Term | Months to years, sized to exit | Typically months, sized to exit |
| Capitalised interest | Available | Available |
- Borrower has no existing mortgage (fresh acquisition or refinance of cleared title)
- Existing first mortgage is on unfavourable terms worth replacing
- Borrower wants a single, simple debt position rather than two layers
- Combined debt position would otherwise exceed second-mortgage envelope
- Existing first mortgage carries favourable terms worth keeping (fixed rate, offset, long-dated commercial)
- Full refinance would fail bank serviceability re-assessment under current policy
- Capital need is short-dated and does not justify refinancing the entire structure
- Speed matters more than total cost: a second mortgage settles in 1-3 weeks vs a bank refinance taking 4-8
In practice
A first mortgage and a second mortgage are the same kind of legal instrument, a registered mortgage on the title of a property, with one difference: priority order. The first mortgage was registered first and ranks senior. The second mortgage was registered later and ranks junior. On any sale or enforcement, the first mortgage holder is paid out in full before the second mortgage holder sees any recovery.
That ranking shapes everything else. The first mortgage holder takes the safer position and prices accordingly: lower rates, longer terms, higher LVRs available, and the simplest enforcement path if anything goes wrong. The second mortgage holder accepts a junior position and prices for the risk: higher rates, often shorter terms, lower combined LVR caps, and a recovery position that is partial or nil if a forced sale at a depressed value occurs.
The structural choice between the two depends on what the borrower already has on title. If the property is unencumbered or being refinanced, a first mortgage is usually the right structure. The borrower ends with a single facility on terms negotiated today, and the lender takes the safest position available. If the property already carries a first mortgage that is worth keeping (favourable rate, an offset facility, a long-dated commercial term), a second mortgage adds capital without disturbing the existing structure. The first stays in place; the second sits behind it.
Combined LVR matters more than either LVR taken alone when a second mortgage is in play. Archer Wealth's standard envelope is combined 80% on prime residential security; commercial, apartments and land sit lower. Above the standard envelope, files go to credit committee with structuring. First-mortgage-holder consent is usually required to register a second; most major banks will consent on standard files with a fee, but the consent process adds one to two weeks to the timeline.
The right answer is rarely "always first" or "always second." It depends on the file: what is already on title, what the borrower needs, how long the facility runs, and what the exit looks like.
Frequently asked
- Is a second mortgage always more expensive than a first?Yes, on the same security, a second mortgage prices above an equivalent first. The premium reflects the weaker recovery position: the second mortgage holder is paid out only after the first is cleared in full, so the risk-adjusted cost of capital is structurally higher.
- Can I have a first mortgage and a second mortgage from the same lender?Yes, this is common. Archer Wealth writes both first and second mortgage facilities; on some files a single combined structure works, on others the existing first is held by another lender and Archer writes the second behind it. The priority arrangement is set out in the loan documents and (where appropriate) a priority deed between the lenders.
- Does a second mortgage need first-mortgage-holder consent?Almost always yes. Standard first mortgage documentation requires the first-mortgage holder to consent before a second is registered. Most major banks consent on straightforward files with a small fee. The consent process adds one to two weeks to the typical timeline and is part of the standard application process.
- What happens if the property is sold while both mortgages are in place?At settlement, both mortgages are paid out from the sale proceeds. The first mortgage is repaid in full first; the second mortgage holder is repaid from whatever remains after the first and selling costs. Any surplus goes to the borrower. If the sale price does not cover both, the second mortgage holder takes a partial recovery or nil.
- Can I have a third mortgage?Legally yes, but in practice very rarely. Third-ranking facilities sit even further down the priority queue and price for that position. Most lenders will not write them, and combined-LVR constraints typically rule them out. If a borrower's capital need cannot be met by a first or second mortgage, the answer is usually to restructure the existing position rather than stack a third.