Second mortgage vs Bank equity release
Second mortgage vs bank equity release in Australia: how each releases capital from existing property, the trade-offs in speed, cost and structure.
Bank equity release refinances or tops up the existing first mortgage, typically at sharp rates but slow (4-8 weeks) and subject to full reassessment of serviceability. A private second mortgage sits behind the existing first without touching it, faster (1-3 weeks), more flexible on serviceability, structurally easier when the first mortgage has favourable terms worth keeping. Equity release wins on rate; second mortgage wins on speed, flexibility and preserving the existing first.
Side-by-side
| Attribute | Second mortgage | Bank equity release |
|---|---|---|
| Effect on existing first mortgage | Untouched, sits behind | Refinanced or topped up |
| Indicative rate | 9-12% p.a. | 6-8% p.a. |
| Time to fund | 1-3 weeks | 4-8 weeks |
| Serviceability reassessment | On the second only | Full reassessment of all debt |
| First mortgagee consent | Usually required | N/A (refinance pays out first) |
| Max combined LVR | Up to 80% | 80% (90% with LMI) |
| Capitalised interest | Available | Generally not |
| Term flexibility | 1-24 months typical | 25-30 year P&I |
| Discharge cost (first mortgage) | Nil, first stays put | Discharge fee + new establishment |
- Existing first mortgage has favourable terms (fixed rate, offset, long-dated)
- Capital need is short-dated (1-24 months) and doesn't justify refinancing the entire structure
- Bank serviceability would fail on full reassessment but second-only is acceptable
- Speed matters, capital required in weeks, not months
- Working capital, deposit release, or bridging that exits within 12 months
- Long-term housing or investment purposes (25-30 year horizon)
- Borrower clears bank serviceability on the full new combined balance
- Existing first mortgage is at an unattractive rate that's worth refinancing anyway
- No urgency, 4-8 week timeline is acceptable
- Looking for the lowest possible long-term rate
In practice
When a borrower has equity in a property they want to release, there are two structural paths. The bank path is to refinance or top up the existing first mortgage, increase the loan balance, take the difference in cash. The private credit path is to register a second mortgage behind the existing first, leaving the first untouched.
Each has structural advantages. The bank path produces a single combined facility at a sharp rate and a long P&I term, the cheapest long-term cost of capital available in the Australian market for property-secured lending. The drawback is the full reassessment: every bank top-up triggers a serviceability test on the entire combined balance under current policy, which can fail where the original loan was approved under different conditions (older income, lower DTI, pre-rate-cycle pricing).
The second mortgage path preserves the existing first mortgage exactly as it is. The bank's facility, fixed rate, offset account, redraw, all stay in place. The private lender writes a separate second-ranking facility behind the first, with its own term, rate and structure. Serviceability is assessed only on the second, not the combined position. The borrower pays a higher rate on the second (typically 9-12% p.a. vs the bank's 6-8% on a refinanced equivalent), but the rate applies only to the new debt, not the entire balance.
The right path depends on three questions. First: what's the capital need's tenor? Short-dated (under 2 years) almost always favours the second mortgage path. Long-term housing favours the bank path. Second: is the existing first mortgage at favourable terms worth keeping? Fixed rates locked in below current variable, offset accounts with material balances, or long-dated commercial facilities all argue for preserving the first. Third: would full bank reassessment pass? If the answer is uncertain or no, a second mortgage avoids the question entirely.
Many experienced borrowers use both, a second mortgage for short-term capital needs that exit through a sale or refinance event, and a bank refinance for genuinely long-term restructuring. The decision is per file, not per borrower.
Frequently asked
- Does the bank have to approve a second mortgage?Usually yes. Most first mortgages contain documentation that requires the first mortgagee's consent before a second mortgage is registered. The consent process is typically straightforward and adds 1-2 weeks to the timeline; banks rarely refuse but they do charge a consent fee.
- What if the first mortgage already has redraw or an offset facility, can I use those instead?If the redraw is sufficient and the rate is acceptable, that's usually the cheapest path of all, no new facility required. Second mortgages and equity releases come into play when redraw isn't available, the first mortgage is fully drawn, or the redraw rate is uncompetitive.
- Can I have a second mortgage and a bank top-up at the same time?Yes, but it's unusual. More commonly the borrower uses one or the other depending on circumstances. The combined LVR cap of around 80% generally constrains running both at meaningful size.
- What happens to the second mortgage if I sell the property?At settlement, both the first and second mortgages are paid out from the sale proceeds. First gets paid in full before second sees any recovery. The borrower receives whatever's left after both are discharged and selling costs are paid.