Removing someone from a New Zealand mortgage is a process that most people encounter at a difficult time — relationship breakdowns, separation, or the death of a co-borrower. It can also happen in less fraught circumstances, such as a refinance where one party is buying the other out, or a family arrangement that has run its course. Whatever the reason, the process is more complex than simply changing a name on a form, and understanding the steps involved will help you navigate it with clarity.

Why Removing Someone From a Mortgage Is Complicated

When two people are on a mortgage, both are jointly and severally liable for the entire debt — not just “their share” of it. The lender entered the agreement based on the combined financial position of both borrowers. Removing one party fundamentally changes the risk profile of the loan from the lender’s perspective, which is why it requires their formal approval rather than simply being an administrative change.

In practice, removing a person from a mortgage is treated similarly to a new loan application. The remaining borrower must demonstrate, on their own, that they can service the loan under the lender’s current criteria.

Common Reasons for Removing a Co-Borrower

• Separation or divorce, where one party is taking sole ownership of the family home
• The end of a de facto relationship
• Death of a co-borrower
• A family loan arrangement that has concluded
• One party’s financial circumstances making the arrangement unsuitable to continue

The Sole Serviceability Test

The central challenge in removing a co-borrower is demonstrating that the remaining borrower can afford the mortgage alone. New Zealand lenders assess this using their standard serviceability criteria — income, expenses, other debts, and current interest rates. The test uses a “stress-tested” interest rate (typically one to two percentage points above the current rate) to ensure the borrower can handle future rate increases.

If the remaining borrower’s income is insufficient to pass this test on their own, the lender may decline to remove the co-borrower. In this situation, options include:

• Selling the property and repaying the mortgage
• Adding a new co-borrower who strengthens the application
• Refinancing to a longer term to reduce the repayment amount to a level that passes the serviceability test
• Waiting until the remaining borrower’s income improves or the loan balance reduces sufficiently

Step-by-Step: How to Remove Someone From Your Mortgage

Step 1: Contact Your Lender

Inform your lender of the situation and request information about their process for removing a co-borrower. Different banks have different requirements, but all will require a formal application and a serviceability assessment. Ask upfront about fees and timeframes.

Step 2: Gather Documentation

The remaining borrower will need to provide documentation to support their solo application, including:

• Recent payslips or, for self-employed applicants, at least two years of financial statements
• Bank statements showing income and expenses
• Details of any other debts (car loans, credit cards, personal loans)
• Identification

If separation is involved, documentation such as a separation agreement or property settlement may also be required.

Step 3: Legal Transfer of Ownership

If the departing co-borrower also holds a share of the property title (which is usually the case), a formal transfer of title is required. This is a legal transaction handled by conveyancers or solicitors. Both parties should ideally have independent legal advice, particularly in a separation context. The transfer typically involves one party paying the other for their share of the equity, or offsetting it against other relationship property.

Step 4: New Mortgage Documentation

Once the lender approves the solo application, new mortgage documents will be drawn up removing the departing borrower from the agreement. These must be signed by all parties (including the departing borrower) in some cases, and witnessed or certified as required.

Step 5: Title Registration

The change of ownership must be registered with Land Information New Zealand (LINZ). Your solicitor or conveyancer will handle this as part of the settlement process, updating the certificate of title to reflect sole ownership by the remaining party.

Costs to Expect

Removing a co-borrower involves several costs:

• Solicitor fees for both parties — commonly $1,500 to $3,000+ depending on complexity
• Lender application or variation fees — typically $100 to $500
• LINZ registration fees
• Potentially a registered property valuation if required by the lender

Working with a mortgage adviser to simplify your home loan through this transition — and to explore whether refinancing to a better rate at the same time makes sense — can help offset some of these costs through long-term savings.

What Happens to the Departing Borrower’s Credit File?

Until the mortgage is formally varied to remove the co-borrower, the departing party remains on the hook for the debt. This means the mortgage appears on their credit record and counts against their borrowing capacity if they want to take out a new loan — for example, to buy a new home. This is why completing the removal process quickly and formally is in both parties’ interests.

In Cases of Death

When a co-borrower dies, the process differs depending on how the property was held. If the title was held as joint tenants (the most common arrangement for couples), ownership passes automatically to the surviving owner without going through the estate. The surviving owner then needs to update the mortgage and title to reflect sole ownership, working with their solicitor and the lender. If the property was held as tenants in common, the deceased’s share passes according to their will or intestacy rules, which can be more complex.

The Role of Relationship Property Law

New Zealand’s Property (Relationships) Act 1976 governs how property is divided when a relationship ends. For couples who lived together for three or more years, the family home is generally split equally regardless of whose name the mortgage or title is in. Any arrangement to vary this — such as one party keeping the property with an agreed payment to the other — should be formalised in a written separation agreement, signed with independent legal advice, to protect both parties and satisfy the lender’s requirements.