New Zealand Property & Finance · Reference Guide
NZ Mortgage Glossary: Every Term You Need to Know, Explained Simply
A plain-language guide to the vocabulary of New Zealand home loans. Grouped by theme so related concepts sit together. Every term links to our in-depth tools and guides where the concept is covered further.
Banks speak a language designed for bankers. Loan agreements are dense with terminology that most borrowers encounter for the first time on the day they sign the biggest financial commitment of their lives. That is not a recipe for good decision-making.
This glossary exists to translate that language into plain English. Every term is explained in the context of New Zealand home lending, because the rules, protections, and conventions here are specific to this country. Where a concept is covered in depth by one of our tools or guides, the entry links directly to it so you can go deeper.
See these terms in action:
Mortgage Rate Planner — compare fixed terms, model repayments, and find your freedom date.
Break Fee Calculator & Guide — estimate your break fee and understand the legal framework.
1. The Basics: Your Loan Structure
At its simplest, a mortgage is a loan secured against a property. You borrow a sum of money, the bank charges interest on the outstanding balance, and you pay it back over an agreed period. But the structure of that arrangement, how the repayments are calculated, how the balance reduces, and what the bank holds as security, determines everything about how much you ultimately pay and how flexible you are along the way.
Table Mortgage
Also called a Principal and Interest loan. This is the standard New Zealand home loan structure. Each payment covers both interest and a portion of the principal, with the interest portion shrinking over time as the balance reduces. In the early years, most of your payment goes to interest. By the final years, most goes to principal. This is the loan type assumed by our break fee calculator.
Interest-Only Loan
A loan where you pay only the interest each period. The principal balance does not reduce. Common among property investors for cash flow management and tax deductibility purposes, but it means the debt itself never shrinks unless you make voluntary principal payments. Most banks limit interest-only periods to five years for owner-occupiers.
Principal
The amount you actually borrowed, excluding interest. If you took out a $500,000 mortgage, $500,000 is your original principal. As you make repayments, the outstanding principal reduces. Interest is always calculated on the current outstanding principal, which is why reducing it faster (through overpayments) saves you money.
Amortisation
The process of gradually paying off both principal and interest over the life of the loan through regular payments. The amortisation schedule determines how much of each payment goes to interest and how much goes to principal. Our break fee calculator uses the standard amortisation formula to estimate your remaining balance at any point in the loan term.
Loan Term
The total length of the mortgage, typically 25 to 30 years in New Zealand. This is not the same as the fixed-rate term (which is the period your interest rate is locked for). A 25-year loan term with a 2-year fixed rate means you refix or renegotiate the rate every two years while the overall loan runs for 25 years. A shorter loan term means higher repayments but dramatically less total interest paid.
Loan-to-Value Ratio (LVR)
Your mortgage balance expressed as a percentage of your property's value. If your home is worth $800,000 and you owe $500,000, your LVR is 62.5%. Banks use LVR to determine risk and pricing: borrowers with an LVR of 80% or below typically qualify for lower "special" rates. The Reserve Bank also imposes LVR restrictions on how much high-LVR lending banks can do. The Rate Planner automatically calculates your LVR and switches between special and standard rates accordingly.
Equity
The portion of the property you actually own, calculated as the property value minus the mortgage balance. If your home is worth $800,000 and you owe $500,000, you have $300,000 in equity (37.5%). Equity grows as you pay down the principal and as the property increases in value. It is the inverse of LVR and is the key metric banks use to assess how much you can borrow, what rates you qualify for, and whether you can access further lending via a top-up.
Cross-Collateralisation
When the bank uses more than one property as security for a single loan, or links the securities across multiple loans. Common for property investors who use equity in their family home to secure an investment property loan. It simplifies lending but adds significant complexity if you want to sell one property, refinance, or switch banks, because the bank holds security over all linked properties.
2. Interest Rates: What You're Paying and Why
The interest rate is the single biggest lever on your total mortgage cost. A difference of just 0.50% on a $500,000 loan over 25 years translates to roughly $50,000 in additional interest. But not all rates are equal, and the number advertised on the bank's website is only the starting point. Understanding the different types of rates, where they come from, and how they move is the foundation of every smart mortgage decision.
Fixed Rate
Your interest rate is locked for a specific period, typically 6 months to 5 years in New Zealand. During this time, your rate and repayments do not change regardless of what happens in the market. The trade-off is reduced flexibility: if you want to exit a fixed rate early, you may face a break fee. Use the Rate Planner to compare the cost of different fixed terms.
Floating Rate (Variable Rate)
The rate moves with the market. The bank can change it at any time, typically in response to OCR movements. Floating rates are generally higher than fixed rates, but they offer full flexibility: no break fees, unlimited extra repayments, and the ability to switch to a fixed rate or change banks at any time. As our break fee guide explains, if your fixed term has expired and you have not refixed, you are on floating and can act freely.
Special Rate
A discounted fixed rate offered to borrowers with at least 20% equity (LVR of 80% or below). Typically 0.80% to 1.00% lower than the standard rate for the same term. Also available to holders of Kainga Ora First Home Loans at some banks. The Rate Planner automatically applies the special rate when your LVR is at or below the 80% threshold.
Standard Rate
The fixed rate available to borrowers with less than 20% equity (LVR above 80%). Higher than the special rate because the bank considers the loan higher risk. As you pay down your mortgage and build equity beyond the 20% threshold, you become eligible to refix at the lower special rate.
Official Cash Rate (OCR)
The interest rate set by the Reserve Bank of New Zealand (RBNZ) as the foundation of monetary policy. It determines the wholesale cost of money in New Zealand. When the RBNZ raises the OCR, wholesale funding costs rise and banks pass this through to retail fixed and floating mortgage rates. When the OCR falls, mortgage rates eventually follow. The OCR is reviewed seven times per year. Our Rate Planner guide discusses how to read the OCR cycle when choosing between fixed and floating.
Wholesale Swap Rate
The rate at which banks borrow money from the wholesale financial market for a fixed term. It is the hidden number behind your retail mortgage rate. When you lock in a 2-year fixed rate, the bank simultaneously locks in 2-year wholesale funding at the prevailing swap rate. If you later break that contract, the bank's loss is calculated based on the movement in this swap rate. Our break fee guide explains the distinction between wholesale and retail rate calculations in detail.
Retail Rate
The interest rate advertised on the bank's website or quoted to you by a mortgage adviser. It is built on top of the wholesale swap rate plus the bank's margin. The retail rate is what you pay; the wholesale rate is what the bank pays. The difference is part of how the bank earns its revenue.
Margin
The difference between the wholesale swap rate and the retail rate you are charged. This covers the bank's operating costs, credit risk, and profit. The margin varies between banks and between products, and it is one of the factors that makes direct rate comparison between lenders useful even when the underlying wholesale rate is the same.
Basis Point
One hundredth of one percentage point (0.01%). Used by banks, the RBNZ, and financial media when discussing rate changes. "A 25 basis point cut" means the rate has been reduced by 0.25%. "50 basis points" equals 0.50%. It sounds like jargon, but once you know the conversion, every news headline about interest rates becomes immediately readable.
3. Loan Options: Structuring for Flexibility
Most New Zealand homeowners do not realise they can split their mortgage across different structures. The right combination of fixed, floating, offset, and revolving credit can save you thousands while keeping your cash flow flexible. Our Rate Planner guide covers these options in depth.
Offset Mortgage
A home loan linked to one or more everyday transaction accounts. The balance in those linked accounts is subtracted from your mortgage balance before interest is calculated. If you owe $450,000 but have $30,000 across linked accounts, you are charged interest on $420,000. You retain full access to the money. Kiwibank offers a 1:1 offset ratio. The Rate Planner includes offset as a strategy option.
Revolving Credit
A large overdraft facility secured against your property. Your salary flows in, your expenses flow out, and interest is calculated daily on the net balance. Every dollar that sits in the account, even for a few days, reduces the interest charged. Requires discipline: if you spend more than you earn, the balance creeps up. Best used for a portion of your mortgage (e.g. $30,000-$50,000) alongside a fixed-rate main loan.
Split Mortgage
Dividing your total lending across multiple loan portions, each with a different rate type or term. For example, $350,000 on a 2-year fixed rate and $100,000 on revolving credit. This is the most common mortgage structure in New Zealand and allows you to balance certainty against flexibility.
Laddering
A split strategy where you fix portions of your mortgage across staggered terms, for example one-third on a 1-year term, one-third on a 2-year term, and one-third on a 3-year term. This means something is always rolling off, so you are never fully exposed to a single rate environment and you always have a portion coming up for renegotiation.
Drawdown
Accessing funds from a revolving credit facility or the initial release of loan funds at settlement. When you settle on a property purchase, the bank "draws down" the loan, transferring the funds to the vendor's solicitor. For revolving credit, drawdown refers to spending from the facility, which increases your balance.
4. Repayments: How You Pay It Back
The amount you pay, how often you pay it, and whether you pay more than the minimum are the three controllable variables that determine how long your mortgage lasts and how much interest you pay in total. The Rate Planner's Mortgage Freedom Calculator lets you model the impact of each.
Minimum Repayment
The lowest amount the bank requires you to pay each period to stay on track with the agreed loan term. Paying only the minimum means you will pay off the loan in exactly the agreed term (e.g. 25 years) and pay the maximum total interest. Any amount above the minimum accelerates your payoff.
Repayment Frequency
How often you make payments: weekly (52 per year), fortnightly (26 per year), or monthly (12 per year). Switching from monthly to fortnightly using the "half-monthly-payment" method results in 26 half-payments, which is equivalent to 13 full monthly payments per year instead of 12. That extra payment reduces your principal faster and can save tens of thousands in interest. The Rate Planner lets you toggle between frequencies and see the impact.
Overpayment / Extra Repayment
Paying more than the bank's minimum required repayment. On floating or revolving credit, there are no limits. On fixed rates, most NZ banks allow overpayments of up to 5% of the loan balance per year without triggering a break fee. The break fee guide covers the 5% prepayment strategy in detail.
Lump Sum Payment
A one-off extra payment applied directly to the principal. Subject to the 5% penalty-free prepayment allowance on fixed-rate loans. Making a lump sum payment does not reduce your minimum repayment; it reduces the loan balance, which means less interest is charged from that point forward and you will pay off the loan sooner.
Penalty-Free Prepayment Allowance
The maximum amount you can pay above the minimum on a fixed-rate loan each year without incurring a break fee. Typically 5% of the outstanding loan balance at the start of the fixed term, renewed annually or at refixing. This can be used either as increased regular payments or as a lump sum. Exceeding this threshold triggers the bank's break fee calculation. See the break fee article for a worked example.
Mortgage Freedom Date
The projected date your mortgage balance reaches zero. Determined by your interest rate, payment amount, frequency, and any overpayments. The Mortgage Freedom Calculator lets you see how even small extra payments per fortnight can shift this date years earlier and save tens of thousands in interest.
5. Costs and Fees: What the Bank Charges
Beyond the interest rate itself, there are fees attached to setting up, changing, or exiting a mortgage. Some are avoidable, some are negotiable, and some are legally capped. Knowing the difference matters, especially when you are comparing the true cost of refinancing or restructuring.
Break Fee (Prepayment Cost / Early Repayment Adjustment)
The fee a bank charges if you end a fixed-rate contract early, based on the bank's actual financial loss from interest rate movements since you locked in. If rates have dropped, the bank loses money and the fee compensates for that loss. If rates have risen, the fee is typically zero. Legally capped under the CCCFA. Our break fee calculator and comprehensive guide covers the formula, the legal framework, worked examples, and strategies to minimise the cost.
Safe Harbour Formula
The legally prescribed method for calculating break fees, set out in Regulation 11 of the Credit Contracts and Consumer Finance Regulations 2004. If a bank uses this formula, the resulting fee is automatically assumed to be a reasonable estimate of loss. Banks may use their own formula instead, but it must produce a reasonable result or it can be challenged. The break fee guide explains this in detail, including the Commerce Commission enforcement history.
Cash-Back / Cash Contribution
A lump sum, typically $2,000 to $5,000 or more, offered by a bank to attract new mortgage lending. It may be used to cover legal fees, valuations, or moving costs. Subject to a clawback clause. Both the break fee guide and the Rate Planner guide discuss cash-backs and the negotiation tactics around them.
Cash-Back Clawback
The requirement to repay some or all of a cash contribution if you leave the bank (fully discharge your mortgage) within a specified period, usually three or four years. Typically pro-rated: leave after one year of a four-year period and you repay 75%. This is completely separate from the break fee and catches many borrowers off guard. See the break fee guide's section on the clawback trap.
Administration Fee
A flat fee, typically $15 to $50 depending on the bank, charged for processing a break, discharge, or restructure. This is charged even when the economic break fee is zero (because rates have risen). The break fee calculator includes estimated admin fees for each major NZ bank.
Discharge Fee
Charged by the bank when it removes its mortgage from the property title. This applies when you sell the property, pay off the loan in full, or refinance to another bank. Typically $35 for a full discharge and $70 for a partial discharge at Kiwibank.
Fixed Rate Lock Fee
A fee paid to lock in a specific interest rate before your loan settles, protecting you against rate rises during the settlement period. Useful if you have conditional approval and settlement is weeks or months away. The fee varies depending on the amount and lock-in duration.
6. Legal Framework: Your Rights and Protections
New Zealand has strong consumer protection legislation that governs how banks can treat you. Understanding the basics means you can challenge a fee, escalate a complaint, or simply know when you are being treated fairly. Our break fee guide covers the legal framework in comprehensive detail.
CCCFA (Credit Contracts and Consumer Finance Act 2003)
The primary legislation governing consumer lending in New Zealand. It requires banks to act responsibly, disclose fees transparently, and limits break fees to the bank's reasonable estimate of actual loss. The 2021 amendments (since partially rolled back) tightened affordability testing requirements. The CCCFA is your foundational protection as a borrower.
Section 54 (Full Prepayment)
The specific section of the CCCFA that establishes your legal right to repay your mortgage early and limits what the bank can charge for doing so. It explicitly prohibits penalty fees and allows only a reasonable estimate of the bank's actual loss.
Regulation 11
The regulation within the Credit Contracts and Consumer Finance Regulations 2004 that prescribes the Safe Harbour formula for calculating break fees. Our break fee calculator implements this formula directly.
Banking Ombudsman
The free, independent dispute resolution service for banking complaints in New Zealand. If you believe you have been overcharged on a break fee or treated unfairly by your bank and the bank's internal complaints process has not resolved the issue, the Banking Ombudsman is your next step. The service is funded by the banks but operates independently.
Commerce Commission
The government agency responsible for enforcing consumer protection law in New Zealand, including the CCCFA and the Fair Trading Act. It has investigated and taken enforcement action against lenders for overcharging break fees, including settlements resulting in refunds to affected borrowers.
Responsible Lending Code
The code that requires banks and other lenders to assess your ability to repay before approving a loan, including stress-testing at interest rates higher than the current market. Banks are required to ensure you can service the loan not just at today's rate but at a test rate (currently around 7.5% at most banks). This is why you might be declined for a loan even though you can clearly afford the current repayments.
7. Moving and Changing: When Life Happens
Mortgages are long-term commitments, but life is not. You might sell, buy somewhere else, switch banks, or need to restructure. These are the terms you will encounter during those transitions.
Refinancing
Moving your mortgage from one bank to another, usually to secure a better interest rate, a cash-back offer, or better service. Refinancing involves discharging the mortgage from the old bank and registering a new one with the new bank. This will trigger any applicable break fee on fixed-rate portions and may trigger a cash-back clawback. Both the break fee guide and the Rate Planner are designed to help you assess whether refinancing makes financial sense.
Portability
Transferring your existing fixed-rate loan to a new property without triggering a break fee. Because you are continuing the contract rather than ending it, no prepayment cost applies. Requires the sale of your old property and the settlement of your new property to be closely coordinated. See the break fee guide's portability section.
Settlement
The legal completion of a property transaction. The date when the purchase price is paid, the title transfers to the buyer, and the bank registers its mortgage. Settlement is coordinated by solicitors and typically occurs on a specific date agreed in the sale and purchase agreement. All mortgage-related costs (break fees, discharge fees, new bank fees) crystallise at settlement.
Bridging Finance
Short-term lending designed to cover the gap when you buy a new property before selling your existing one. For a period, you are effectively servicing two mortgages. Bridging loans are typically interest-only and at a higher rate, intended to be repaid as soon as your existing property sells. They carry risk: if the sale takes longer than expected or falls through, the cost escalates quickly.
Top-Up
Borrowing additional money against your existing property, added to your current mortgage. Common for home renovations, debt consolidation, or funding a deposit on an investment property. Requires sufficient equity in the property to support the additional lending while staying within the bank's LVR limits.
Pre-Approval / Conditional Approval
A bank's in-principle agreement to lend you a certain amount, subject to finding a suitable property and meeting final conditions (such as a satisfactory valuation and confirmed income). Typically valid for 90 days. It is not a guarantee of lending but gives you confidence to make offers and signals to sellers that you are a serious buyer.
8. Property-Specific Terms
Some mortgage terminology relates to the property itself rather than the loan. These terms come up during the buying process and when the bank assesses your application.
Registered Valuation
A formal property valuation conducted by a registered valuer, often required by the bank before approving a loan or when the property type is unusual (apartments, leasehold, rural). The valuer assesses the property's current market value based on recent comparable sales, condition, and location. The cost is typically borne by the borrower and ranges from $500 to $1,000 or more depending on the property.
Government Valuation (GV / RV / CV)
The rating valuation set by the local council for the purpose of calculating rates. Variously called GV (Government Valuation), RV (Rateable Value), or CV (Capital Value) depending on the region and era. This is not the same as market value and can be significantly higher or lower than what the property would actually sell for. Banks may use the GV as a reference point but will typically require a registered valuation for lending decisions.
Security
The property (or properties) the bank holds a mortgage over as collateral for your loan. If you default on the loan, the bank has the legal right to sell the security to recover the debt. In the case of cross-collateralisation, multiple properties may serve as security for a single lending arrangement.
Title
The legal record of property ownership held by LINZ (Land Information New Zealand). The title shows who owns the property, any registered mortgages, covenants, easements, and other legal interests. When a bank provides a mortgage, it registers an interest on the title. When the mortgage is repaid, the bank discharges that interest.
Mortgage Registration
The legal process of recording the bank's interest (security) against the property title with LINZ. This is done by your solicitor at settlement and gives the bank its legal right over the property. When you refinance or repay the loan, the old mortgage is discharged and a new one (if applicable) is registered.
Putting It Into Practice
Understanding the vocabulary is the first step. The second step is using it. When you sit across from a bank officer or a mortgage broker, the language they use should not be a barrier. When you read a loan contract, the terms should be familiar. When you hear a news headline about the OCR or swap rates, you should know immediately what it means for your repayments.
Our tools are built to let you apply these concepts to your own numbers. The Rate Planner lets you compare fixed terms, toggle frequencies, and model the impact of overpayments. The Break Fee Calculator estimates your exit cost and walks you through the legal protections. Together with this glossary, they give you everything you need to make informed, confident decisions about the biggest financial commitment of your life.
Disclaimer
This glossary is for educational purposes only and does not constitute financial or legal advice. Mortgage terms, conditions, and fees vary between lenders and change over time. Always confirm details directly with your bank or a qualified mortgage adviser before making financial decisions.
