HomeCalcs

Free mortgage & property calculators for New Zealand homeowners

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Built for New Zealand

Know your numbers
before you make your move

13 free calculators covering every stage of the property journey — from buying your first home to managing your mortgage and growing your portfolio.

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NZ rates & rules
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INTEREST RATE 5.8% HOME EQUITY $320k +12% this year PROPERTY VALUE
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What is HomeCalcs?

HomeCalcs is a free suite of 13 mortgage and property calculators built specifically for New Zealand. Every calculation uses NZ-specific rules: RBNZ lending guidelines, KiwiSaver regulations, standard commission structures and local cost benchmarks. No account is required and no data is stored — everything runs privately in your browser.

The tools cover the full property journey: saving for a first home, estimating borrowing power, comparing refix options, calculating rental yields and understanding the true costs of buying or selling. They are designed for education and planning, not as financial advice — always confirm decisions with a qualified mortgage adviser.

🏠NZ banks generally require a 20% deposit (80% LVR) for owner-occupiers under RBNZ lending restrictions
🥝KiwiSaver members can withdraw their full balance minus $1,000 toward a first home after 3 years of contributions
📊Real estate agent commissions in NZ typically range from 2% to 3.5% of the sale price, plus GST
💡Paying weekly instead of monthly can save tens of thousands of dollars in interest over a typical 30-year NZ mortgage

Property Owner Calculators

Tools for anyone who owns, rents out or is planning to sell property in New Zealand.

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True Cost of Selling

See exactly what you'll net after agent fees, legal costs and your mortgage payout.
Cost Breakdown
Gross Sale Price
Agent Commission
Legal Fees
Marketing
Moving Costs
Staging Costs
Total Selling Costs
Mortgage Payout
Net Proceeds
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Rental Yield Calculator

Calculate gross and net rental yield plus annual income after operating costs.
Gross Yield
Annual rent ÷ value
Net Yield
After all costs
Annual Net Income
Before tax
Deductions
Annual Gross Rent
Rates
Insurance
Maintenance
Property Management
Annual Net Income
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Interest Rate Stress Test

See how your repayments change if rates rise — before they do.
Repayment Comparison
Current Rate Repayment
Stress Test Rate
Stress Test Repayment
Extra per period
Extra per year
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Repayment Frequency Comparison

Compare weekly, fortnightly and monthly repayments — and see how much you save.
Frequency Comparison
FrequencyRepaymentTotal InterestTotal Cost
Weekly
Fortnightly
Monthly
Interest saved (weekly vs monthly)

Common questions about NZ property ownership

What does it cost to sell a house in New Zealand?

The total cost of selling a house in NZ typically includes agent commission (2–3.5% of the sale price plus GST), legal fees ($1,200–$2,000), marketing costs ($2,000–$8,000) and any staging if used. On an $800,000 sale with 2.95% commission, agent fees alone come to approximately $23,600. Total selling costs before mortgage payout commonly range from $25,000 to $45,000.

What is a good rental yield in New Zealand?

A gross rental yield of 4–6% is generally considered reasonable for NZ investment properties. Net yield — after rates, insurance, maintenance and property management — is typically 1–2 percentage points lower. Yields vary significantly by region: provincial towns often return 5–7% gross, while Auckland and Wellington inner suburbs typically return 3–4.5%.

How do I calculate gross rental yield in NZ?

Gross rental yield is annual rental income divided by the property value, multiplied by 100. A property worth $700,000 earning $560 per week generates $29,120 per year, giving a gross yield of 4.16%. Use the Rental Yield Calculator above to factor in operating costs and calculate your net yield after all expenses.

What is a mortgage interest rate stress test?

A stress test calculates your repayments at a higher hypothetical interest rate — typically 2% above your current rate — to check whether you could still afford payments if rates rose. NZ banks apply their own internal stress test rates (often 8–9.5%) when assessing loan applications under CCCFA guidelines, regardless of the rate you will actually pay.

Does paying weekly instead of monthly save money on a NZ mortgage?

Yes. Paying weekly means making 52 payments per year, which is the equivalent of 13 monthly payments rather than 12. On a $500,000 mortgage at 6.5% over 30 years, switching from monthly to weekly payments saves approximately $80,000 in interest and cuts several years off the loan term. Use the Repayment Frequency Comparison calculator above to model your loan.

What is LVR in New Zealand home lending?

LVR (Loan to Value Ratio) is your mortgage balance divided by your property's value, expressed as a percentage. The Reserve Bank of NZ (RBNZ) sets LVR restrictions limiting high-LVR lending. Owner-occupiers generally need a minimum 20% deposit (80% LVR or lower) to qualify for standard NZ bank lending. Higher-LVR loans are available but subject to stricter criteria and lender limitations.

First Home Buyer Calculators NZ

Practical calculators to help you plan, save and understand your buying power.

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KiwiSaver First Home Withdrawal Estimator

Estimate how much of your KiwiSaver balance you can use toward your first home.
Withdrawal Estimate
Current Balance
Minimum Retained ($1,000)$1,000
Estimated Withdrawable Amount
Enter your balance and years contributing to see your estimate.
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Deposit Progress Tracker

Know exactly when you'll hit your deposit target based on your current savings rate.
Progress Summary
Deposit Target
Current Savings
Gap to Target
Estimated months to goal
Estimated years to goal
Projected target date
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Borrowing Power Calculator

Get a rough estimate of your maximum borrowing capacity before you talk to a lender.
Max Borrowing
Estimated maximum loan
Required Deposit
At selected LVR
Max Purchase Price
Loan + deposit
Indicative Monthly Repayment
Indicative Weekly Repayment
This is a simplified estimate only. Lenders apply their own affordability assessments under CCCFA guidelines, using a higher test rate, specific living cost benchmarks and credit history. Always confirm with a mortgage adviser or lender.
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Legal and Due Diligence Cost Estimator

Understand the upfront costs beyond your deposit — before you go unconditional.
Estimated Costs
Lawyer Fees (conveyancing)
LIM Report
Builder's Report
Loan Registration Fee
Total Estimated Range
These are indicative estimates only. Actual costs vary by lawyer, region and property complexity. Always get quotes from your own solicitor before proceeding.

Common questions for first home buyers in New Zealand

How much can I borrow for a mortgage in New Zealand?

Your borrowing capacity depends on gross income, existing debts, number of dependants and the lender's test rate. As a rough guide, NZ banks lend around 4–5 times gross annual income, subject to CCCFA affordability testing. A person earning $100,000 with no debt and no dependants might borrow $500,000–$550,000 at typical test rates. Use the Borrowing Power Calculator above, then confirm with a mortgage adviser.

How much KiwiSaver can I withdraw for a first home?

After contributing for at least 3 years, you can typically withdraw your full KiwiSaver balance minus $1,000. There is no upper cap on the withdrawal amount. Both employee and employer contributions plus investment returns are eligible, but member tax credits must remain in the scheme. You must intend to live in the property as your primary residence.

How long does it take to save a house deposit in NZ?

For a 20% deposit on a $700,000 property ($140,000 target), saving $2,000 per month from $40,000 already saved would take approximately 4.2 years at a 3% annual return. Including KiwiSaver contributions and any investment growth can shorten this timeline. Use the Deposit Progress Tracker above to model your exact situation and see a projected target date.

What are the legal and due diligence costs when buying a house in NZ?

Typical costs include: solicitor/conveyancing fees ($1,500–$2,500), a LIM report ($300–$500), a builder's inspection ($500–$1,000 for existing properties) and mortgage registration ($150–$200). Total due diligence costs for an existing property commonly range from $2,500 to $4,200. New builds generally do not require a builder's report. Use the Legal Cost Estimator above for a detailed breakdown.

What is a LIM report and do I need one when buying a property in NZ?

A LIM (Land Information Memorandum) is issued by the local council and summarises all information held about a property: building consents, drainage, zoning, natural hazard classifications and any notices issued. It is strongly recommended for any purchase in NZ. A LIM costs approximately $300–$500 and takes 5–10 working days from the relevant council.

How does the NZ 20% deposit requirement work?

The RBNZ requires most banks to limit new owner-occupier lending above 80% LVR. In practice, a 20% deposit is the standard requirement for NZ home buyers accessing mainstream bank lending. Some exceptions apply — including certain new build lending and first home buyer programmes through Kainga Ora — but higher-LVR loans carry stricter criteria and limited availability.

Mortgage Refinancing Calculators NZ

Tools to help you make smarter decisions when breaking, splitting or refixing your mortgage.

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Break Fee Estimator

Get a rough sense of what it could cost to break your fixed rate early.
Estimated Break Fee
⚠️ This is an approximation only. Actual break fees are calculated by your lender using their own wholesale rate data and methodology, and may differ significantly. Always get a break fee quote directly from your bank before making any decisions.
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Mortgage Split Calculator

Model the blended rate and repayments for a fixed/floating split structure.
Fixed Portion
Floating Portion
Blended Rate
Combined Repayments
Weekly
Fortnightly
Monthly
Annual Interest Cost
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Refix Comparison Tool

Compare up to three fixed terms and floating — and find the lowest-cost option over two years.
2-Year Interest Cost Comparison
Monthly Repayment Comparison
OptionRateTermMonthly Repayment2yr Interest
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Overpayment Impact Calculator

See how much time and interest you save by paying a little extra each period.
Time Saved
Off your loan term
Interest Saved
Total over life of loan
New Payoff Date
Original payoff date
Base repayment (selected frequency)
New repayment with extra
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Equity Unlock Calculator

Find out how much equity you could access for renovations, investment or other goals.
Current LVR
Usable Equity (80%)
Usable Equity (70%)
Property Value
Outstanding Mortgage
Total Equity (value − mortgage)
80% LVR ceiling
Accessible equity at 80% LVR
Usable equity is the amount you could potentially borrow against your property without exceeding a given LVR. Lenders will assess serviceability, credit and other factors before approving any equity release. This figure is an estimate only.

Common questions about NZ mortgage refinancing

How is a mortgage break fee calculated in New Zealand?

NZ break fees are calculated using the difference between the wholesale swap rate when you fixed and the current wholesale rate for the remaining term, multiplied by your outstanding balance and time remaining. If current wholesale rates are lower than when you fixed, you will typically pay a break fee. If rates have risen since you fixed, you may pay nothing. Always get an exact quote from your lender before deciding.

Should I fix or float my NZ mortgage?

Fixed rates offer certainty and are typically lower than floating rates in a normal yield curve environment. Floating rates allow unlimited extra repayments or switching without penalty. Many NZ borrowers split their mortgage — fixing a portion for rate certainty while keeping a smaller floating portion for flexibility. The right structure depends on your financial position and expectations about rate movements.

What is a mortgage split and how does it work in NZ?

A mortgage split divides your home loan into two or more portions with different rate structures. The most common approach is fixing a majority (typically 60–80%) for certainty and keeping a portion floating for repayment flexibility. The blended rate is a weighted average of both. For example, fixing 70% at 5.99% and floating 30% at 7.50% produces a blended rate of approximately 6.44%.

What is a mortgage refix and how does it differ from refinancing in NZ?

A refix means agreeing a new fixed rate with your existing lender at the end of your current term. Refinancing means switching your mortgage to a different lender entirely. Refixing at term expiry incurs no break fee and minimal paperwork. Refinancing can access a better rate but involves legal fees, a new application and possibly a cash contribution from the new lender. Use the Refix Comparison Tool above to model your options.

How much money can overpaying my NZ mortgage save?

Even small regular overpayments deliver compounding savings over time. Paying an extra $100 per week on a $500,000 mortgage at 6.5% over 30 years saves over $130,000 in interest and reduces the loan term by approximately 6 years. The savings grow because extra payments reduce the principal balance faster, lowering the interest charged on every subsequent payment.

How much equity can I unlock from my NZ property?

Usable equity at 80% LVR equals 80% of property value minus your outstanding mortgage. On a property worth $900,000 with a $350,000 mortgage, you could access up to $370,000 at 80% LVR (or $280,000 at a more conservative 70% LVR). Lenders assess income, credit history and intended purpose before approving any equity release. Use the Equity Unlock Calculator above to estimate your position.

NZ Mortgage and Property Terms Explained

Plain-language definitions of key terms used in New Zealand mortgage and property transactions.

LVR (Loan to Value Ratio)
LVR is your mortgage balance expressed as a percentage of your property's value. A $400,000 loan on an $800,000 property is a 50% LVR. The Reserve Bank of NZ restricts banks from issuing more than a set share of new lending above 80% LVR for owner-occupiers, making a 20% deposit the standard threshold for conventional NZ home loans.
Break Fee
A break fee (or early repayment charge) is what NZ banks charge when you end a fixed-rate mortgage before the term expires. The fee compensates the bank for the difference between your contracted rate and the current wholesale rate for the remaining fixed period, multiplied by your outstanding balance.
KiwiSaver
KiwiSaver is a voluntary workplace savings scheme administered by Inland Revenue. Employees contribute a minimum of 3% of gross income; employers match at least 3%. After 3 years of contributions, members can withdraw their full balance (minus $1,000) toward the purchase of a first home, subject to intending to live in the property.
Gross Rental Yield
Gross rental yield is annual rental income divided by the property's purchase price or current value, expressed as a percentage. It does not account for operating costs. A property worth $700,000 earning $560 per week generates $29,120 annually, giving a gross yield of approximately 4.16%.
Net Rental Yield
Net rental yield is rental income after deducting all operating costs (council rates, insurance, maintenance, property management fees) divided by the property value. Net yield is the most accurate measure of actual investment return and is typically 1–2 percentage points below gross yield in NZ.
Mortgage Refix
A refix is when a borrower agrees a new fixed interest rate with their existing lender at the end of the current fixed term. It differs from refinancing, which involves switching to a new lender. Refixing at term end incurs no break fee and is the simplest way to update your rate.
Floating Rate
A floating (or variable) mortgage rate moves in line with market conditions and the RBNZ's Official Cash Rate. Floating rates are typically higher than short-term fixed rates but allow unlimited extra repayments without penalty, giving borrowers the flexibility to reduce their loan balance faster.
LIM Report
A Land Information Memorandum (LIM) is issued by the local council and lists all information it holds about a property: building consents, zoning, drainage, stormwater connections and natural hazard status. Recommended for all NZ property purchases. Costs approximately $300–$500 and takes 5–10 working days to obtain.
Equity
Equity is the difference between a property's current market value and the outstanding mortgage balance. A home worth $900,000 with a $350,000 mortgage has $550,000 in equity. Equity can be accessed for renovations, investment or other purposes by increasing the mortgage, subject to LVR limits and lender approval.
CCCFA
The Credit Contracts and Consumer Finance Act requires NZ lenders to verify that borrowers can afford repayments without hardship. Under the CCCFA, banks must assess all income, expenses, debts and dependants before approving a home loan, and apply a stress test rate significantly above the actual rate being offered.
OCR (Official Cash Rate)
The OCR is the benchmark interest rate set by the Reserve Bank of New Zealand (RBNZ) to manage inflation and economic activity. It directly influences floating mortgage rates (which typically move within days of an OCR change) and indirectly affects fixed rates through its impact on wholesale funding costs and market expectations.
Conveyancing
Conveyancing is the legal process of transferring property ownership from seller to buyer. In NZ, a solicitor handles contract review, title searches, settlement and mortgage registration on behalf of the buyer. Legal fees for residential conveyancing typically range from $1,500 to $2,500 depending on complexity and the firm used.