Second mortgage vs caveat loan: instruments, consents and sequencing
“Second mortgage” and “caveat loan” get used interchangeably. They are not the same instrument, they need different consents, and they settle on very different timelines. On a deal with a hard settlement date, choosing the wrong one is how you miss it.
Three instruments, not two
1. A registered second mortgage
A mortgage registered on title behind the existing first. It is the strongest position for the incoming lender and the slowest to put in place, because registration behind an existing mortgagee generally requires that mortgagee’s formal written consent — and a priority deed to govern how the two lenders rank.
2. A caveat supported by a contingent second mortgage
The lender takes a caveat now, plus a second mortgage that is executed but only registrable if the borrower defaults. This is often acceptable to private lenders and is materially faster, because it can avoid the need for formal written first-mortgagee consent to registration — an acknowledgement that the first mortgagee is aware of the additional security can be enough.
This is the structure most often reached for when the deal is sound but the calendar is not.
3. A caveat only, with capitalised interest
No mortgage instrument at all. Suits small, short top-ups — a three-month facility behind an existing first, where a full valuation and registration process cannot be justified by the size of the loan. Weakest security, fastest to execute, priced accordingly.
The priority deed is the default friction point
Whenever a private second sits behind an existing first mortgage, a deed of priority is the thing that will hold you up. Budget time to negotiate one rather than assuming it can be waived. They are especially hard to obtain from major banks — flag that to the incoming second-mortgage lender early so expectations on updated financials and timing are set from the start.
Where the same lender pairing recurs, push both sides to standardise on one priority deed precedent. It converts a two-week negotiation into a two-day one on the next deal.
When a deed would blow out the timeline
Propose an interim undertaking plus a tacking letter instead. Some private funders will accept it to keep settlement on track, with the formal deed following. It is worth asking before you accept a delayed settlement.
Caveat-based partial settlement
Where a second-mortgage settlement stalls on slow security perfection — title production, sworn valuations to be sent directly by the valuer, mortgage registration — propose settling on caveat only and releasing part of the funds upfront, with the balance released once registration and title requirements are met. It keeps the deal alive and preserves the relationship with whoever referred it.
Whose consent, and in what order
- Registered second mortgage: first mortgagee’s formal written consent, plus a deed of priority. Slowest.
- Contingent mortgage plus caveat: often only an acknowledgement that the first mortgagee is aware. Faster.
- Caveat only: no first-mortgagee consent to registration required, because nothing is being registered. Fastest, weakest.
One rule that applies before you write a private second yourself: require the executed first mortgage loan documents, the most recent QS report, recent site photos, a current first-mortgage loan statement, the latest progress claim report, and explicit written confirmation the senior lender consents to the second mortgage being registered. Proceeding without that consent risks a priority dispute later.
Structural points that decide the deal
Check who holds the first before you pitch
Many private investor groups will only lend behind an institutional bank lender, not behind another private fund. One investor group declined to sit behind a private first and instead proposed the borrower repay the existing debt entirely so the investors could take first position themselves.
Some lenders go further: second-mortgage appetite up to 75% LVR, but only where the first sits with a genuine tier-1 bank at up to 70% LVR in a metro location. A first with a non-bank at 65–71% is declined outright.
Others will not write a standalone second at all — only their own combined stretched first-plus-second up to around 85% LVR. Route those as a full refinance, not a second-only request.
Term matching
A second mortgage’s term should generally not exceed the first mortgage’s remaining term. Second mortgagees routinely insist their facility matures no later than the senior loan, to avoid a maturity mismatch. Check the first mortgage’s actual minimum term and lock-in clause in the signed documents, not from memory.
Extensions cut both ways
An incoming senior financier will generally not accept a soft undertaking from a subordinate mortgagee whose facility is being extended. Expect them to require the extension’s interest to be fully prepaid upfront as a settlement condition — an unfunded extension leaves them exposed to a silent default on the junior facility.
Conversely, a first mortgagee is under no obligation to restructure its own facility to suit a subordinate mortgagee’s preferences. It can proceed on the terms already agreed with the borrower and let the junior party react.
Lighter-touch alternatives worth proposing
- A springing charge — additional security over another asset that only crystallises on default of the first mortgage. Useful where a borrower resists granting full additional security; the lender can otherwise proceed at a lower LVR and a correspondingly lower net advance.
- A cross-caveat over a separate asset, often conditional on that asset’s own LVR staying under a cap. Expect this where headroom on the primary security is thin.
- Temporary additional security released on sale — a property already under a live sale campaign can be added as temporary second-mortgage security, provided the term sheet explicitly carves out automatic release of that charge on settlement of its own sale.
Two mechanics worth knowing
Multiple private lenders can sit on a single mortgage — one primary lender or arranger with the rest as co-lenders on the same instrument, rather than each needing a separately ranked mortgage. Explain this to the settlement solicitors up front; several lender names on a file otherwise reads as multiple separate securities and stalls document preparation.
Upsizing is usually a deed of amendment, not a new facility. Faster and cheaper: cap the rate at the existing level and apply the establishment fee only to the upsized portion. Note the caveat still has to be released and re-lodged even for an amendment.
Choosing
If you have time and the first mortgagee is cooperative, take the registered second — it prices best. If the calendar is the binding constraint, the contingent-mortgage-plus-caveat structure buys weeks. If the facility is small and short, caveat-only is proportionate. The mistake is starting down the registration path with a major bank first mortgage and a three-week settlement, and discovering in week two that the priority deed has not moved.
General information only. It is not legal advice, credit assistance, financial product advice, or an offer of finance. Security structures have significant legal consequences — obtain your own legal advice before granting or taking any security. Terms described are indicative observations over 2024–2026.