Commercial finance explained

Second mortgages and subordinated debt: what sitting behind actually means

A second mortgage is not a smaller version of a first. It is a different risk with a different set of permissions, and the first mortgagee usually has a say in whether it happens at all.

Last updated: 25 August 2026

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The short version

Position decides almost everything. A first mortgagee is paid out first from any sale and generally controls enforcement. A second sits behind, recovers only what is left, and often cannot act independently.

That is why second-position money is priced and structured the way it is, and why it usually requires the first mortgagee's agreement to exist comfortably. The commercial question is not whether a second is expensive but whether the equity behind the first genuinely supports it.

How the position works

Priority is by registration and by deed

Registration establishes order; a priority deed between the lenders sets out the detail — how much the first may advance, what each can do on default, and who is told what.

First-mortgagee consent

Most first mortgages restrict further encumbrances. Consent is often required, sometimes refused, and always takes time. Assuming it is the most common planning error.

Enforcement rights are limited

A second may be unable to appoint a receiver or force a sale without the first's involvement, which is precisely what makes the position riskier.

Pricing follows the equity, not the borrower

What matters is the room between total debt and a realistic realisable value. Thin equity behind the first prices sharply or is declined outright.

Short by nature

Second-position facilities are usually short, with a defined exit — a sale, a refinance of the whole position, or a capital event.

A caveat is not a second mortgage

A caveat records a claimed interest rather than a registered security with a priority. Different instrument, different protection — see caveat lending.

When a second is the sensible answer

It is a legitimate tool in a narrow band of situations, and out of place in most others.

The first facility is cheap and worth keeping. Refinancing the whole position to release a modest amount would cost more than sitting a second behind it — break costs, new fees, a worse rate on the whole balance.
A dated, defined need. A settlement, a capital call, a contracted obligation, with a real exit behind it.
Genuine equity behind the first. Not the owner's estimate — a realistic value, conservatively assessed.
The first mortgagee will consent. Establish this early, because it decides whether the structure is available at all.
Not sensible: funding a trading shortfall, or adding a layer because serviceability failed on the first. Neither is fixed by more debt in a weaker position.
Not sensible: where the whole position could simply be refinanced. If one facility solves it, one facility is usually better than two — see consolidating debt.

What a broker should establish first

Read the first mortgage before proposing anything. What it says about further encumbrances, cross-collateralisation and default decides the shape of the deal, and it is a document the borrower already has.

Establish the real equity, then test it. The relevant number is not value less debt on a good day; it is what the asset would realise in a reasonable selling period, less everything ahead of the second. The gap between those two figures is where borrowers get hurt.

Then price the alternative honestly. A borrower should see the cost of a second alongside the cost of refinancing the whole position, including break costs and fees, because sometimes the simpler structure genuinely wins and sometimes it genuinely does not.

Finally, plan the consent conversation. A first mortgagee that learns about a second by finding it on the title reacts differently to one that was asked. The security stack generally is covered in security and guarantees.

Where La Vitesse fits

We do not lend, take security or arrange positions. Second-position situations surface on your call from what a borrower describes about their existing facilities.

Commercial finance leads capture property type, approximate value and LVR range with the amount, purpose, timeframe and the borrower's notes, sold once, to one broker, never resold. Pay per lead, no lock-in contracts, no setup fees. The lead is an introduction, not a recommendation.

Common questions

Does a second mortgage always need the first mortgagee's consent?

Not universally, but most first mortgages restrict further encumbrances, so in practice it is usually required or strongly preferable. Proceeding without checking risks a default under the first facility, which is a far bigger problem than the second was solving.

What is a priority deed?

An agreement between the two lenders recording their order, how much the first may advance in priority, what happens on default, and what each must tell the other. It is what makes a second position workable rather than merely registered.

Why is second-position money so much more expensive?

Because recovery depends on there being value left after the first is paid out, and because enforcement options are limited. The price reflects the position, not a judgement about the borrower.

Is a second mortgage better than refinancing everything?

Sometimes. Where the first facility is cheap, large and expensive to break, adding a small second can be the cheaper answer. Where the first is unremarkable, one clean facility is usually better than two. It is an arithmetic question, and it should be shown to the borrower as one.

Do your enquiries flag existing mortgages?

Only through the borrower's notes and the LVR range they state. Existing facilities and their positions are established by the broker and confirmed from the title, not taken from an enquiry.