Second mortgages: borrowing behind your bank without moving it

Sometimes the best way to shop is to leave your main basket where it is and pick up one extra item from another stall. That’s what a second mortgage does. Your bank keeps its first mortgage and its relationship with you, and a second lender advances money against the equity left over.

How does a second mortgage work?

Every property has a record of title held by Land Information New Zealand, and registered mortgages appear on it in priority order. The first mortgage, usually your bank’s, ranks first. A second mortgage is registered behind it. If the property were ever sold to repay debt, the first lender is paid in full before the second receives anything.

Because the second lender is further back in the queue, it takes more risk. It manages that risk by lending less against the property, charging more, and often keeping terms shorter.

When does a second mortgage make sense for a business?

It’s most useful when:

• you need money faster than your bank can provide it;
• your bank won’t lend for the purpose, or wants a full restructure you’d rather avoid;
• you have a fixed-rate bank loan with break costs that make refinancing expensive;
• the need is short to medium term, with a clear way to repay; or
• you want to keep business borrowing separate from your main home loan.

Common business purposes include clearing an IRD debt, paying suppliers for a large order, funding working capital through a growth spurt or seizing an opportunity such as buying out a competitor’s stock.

What do second-mortgage lenders check?

Check	What they want to see
Property value	A current valuation, often lender-ordered
First mortgage balance and conduct	Statements showing repayments are up to date
Combined LVR	First plus second loan within the lender’s limit
Consent	Whether the first mortgagee must agree, and whether it will
Purpose	A genuine business purpose
Exit	How the second mortgage will be repaid or refinanced
Credit and IRD	Considered, but property and exit often weigh more

Second-mortgage lenders are often private lenders or non-bank lenders who specialise in property-backed business loans.

What do second mortgages cost?

They cost more than first mortgages because of the extra risk. When comparing, gather:

• establishment and broker fees, and whether they’re deducted from the advance;
• legal costs, both yours and the lender’s;
• valuation costs;
• any prepaid or capitalised interest;
• monthly or account fees;
• minimum interest periods and early repayment fees;
• discharge fees; and
• default and extension charges.

Then run the offers through the offer comparer. Because second mortgages are often short-term, the cost of an early exit can decide which offer is cheapest; see early repayment and exit costs.

Wondering whether there’s enough equity behind your bank? Ask us with a quick enquiry. There’s no credit check and no obligation.

What are the risks?

• Two lenders, two sets of obligations. A default on one can be a default on the other.
• Your property is on the line. If you can’t repay, enforcement can lead to a sale. The Banking Ombudsman Scheme’s guidance on mortgagee sales is sobering reading, even if your second lender isn’t a bank.
• Consent delays. If your bank must consent, timing can slip.
• Short terms need firm exits. If the plan is a sale or refinance, have a backup.
• Costs add up. Higher pricing plus fees means you should borrow only what you need, for as short a time as practical.

What happens if repayments go wrong?

It’s worth knowing the worst case before you sign. The Banking Ombudsman Scheme’s guide to mortgagee sales, updated in November 2025, describes the usual path: contact after missed payments, a letter of demand, then a formal notice under the Property Law Act 2007 giving at least 20 working days to respond. It also notes that borrowers remain liable for any shortfall if a sale doesn’t cover the debt, plus holding costs until settlement. Its strongest advice is to talk to your lender early. The same applies with a second-mortgage lender: if you can see a problem coming, raise it while there are still options such as an extension, a partial sale or a refinance.

What does a sensible second-mortgage deal look like?

Illustrative example. A Nelson hospitality group owes Inland Revenue $95,000 after a slow winter and wants to clear it before penalties grow. The directors’ home has a fixed-rate bank mortgage with significant equity, and breaking the fixed rate would be costly. A private lender offers a 12-month second mortgage with fees deducted at settlement, interest paid monthly and a small early repayment fee after six months. The directors plan to repay from summer trading and, as a backup, refinance into their bank loan when the fixed period ends. They obtain the bank’s consent, confirm the exit costs in writing and sign.

Is a second mortgage right for you?

A second mortgage is a useful tool when you have equity, a business need and a plan to repay, and when touching your first mortgage would cost more or take too long. It’s the wrong tool for a long-term shortfall with no clear end, or when the property risk isn’t one you’re willing to take.

Want to explore borrowing behind your bank?

Tell us about the property, your current mortgage and what the money is for. There’s no credit check when you enquire, and your details aren’t sent to a crowd of lenders; a real person reviews your situation and calls to talk it through. Accurate figures for the property value and mortgage balance help us find the right lender first time. See if you qualify.