Everything you need to model a New Zealand home loan. 34 calculators covering repayments, borrowing capacity, deposit savings, LVR, refinancing and rental yield. All free, all current to 2026 RBNZ and bank rules.
Model how your loan changes shape under different rates, terms, and payment patterns.
Weekly, fortnightly or monthly repayments on any loan amount, rate, and term.
Open calculatorRepayments on an interest-only loan and the balance still owing at the end of the term.
Open calculatorHow an offset account against your mortgage reduces interest paid over the life of the loan.
Open calculatorHow much a one-off extra payment shaves off your total interest and shortens the term.
Open calculatorMortgage repayment as a portion of your weekly or monthly take-home pay.
Open calculatorThe true effective rate including fees, low-equity premiums, and compounding effects.
Open calculatorWhen you reach 25%, 50%, 75% or 100% paid down, given your rate and term.
Open calculatorChoose between fixed terms, compare lenders, and look at rates in historical context.
Compare bank offers side-by-side, including cash contributions and fees.
Open calculatorChoose between 6-month, 1-year, and 2-year fixed rates given your view on future rates.
Open calculatorCompare 20, 25 and 30-year terms on the same loan to see total interest cost.
Open calculatorWhere current NZ mortgage rates sit against the long-run RBNZ history.
Open calculatorWork out how much bank finance you can get and what you need to bring to the table.
How much an NZ bank will lend you, based on income, expenses, and existing debts.
Open calculatorHow long it will take to save a 10% or 20% deposit at your current saving rate.
Open calculatorDeposit, KiwiSaver withdrawal, government grants and LVR combined into one plan.
Open calculatorYour loan-to-value ratio against current RBNZ thresholds for owner-occupiers and investors.
Open calculatorLoan repayments as a portion of gross income, the older banking metric still used alongside DTI.
Open calculatorCompare your current loan to a new offer and weigh up the cost of moving.
Yield, cashflow, capitalisation rate, and the metrics every NZ landlord should know.
Gross and net yield on a rental property based on price, rent, and outgoings.
Open calculatorTotal return on a rental property: yield plus capital gain over your hold period.
Open calculatorPre-tax weekly cashflow on a rental after mortgage, rates, insurance, and management fees.
Open calculatorCap rate (NOI divided by purchase price) for an income-producing property.
Open calculatorCompare total housing cost across NZ regions including rates, insurance, and price levels.
Open calculatorTools for buying off the plans, building new, and small-scale development.
New-build LVR exemptions and progress-payment scheduling for off-the-plan purchases.
Open calculatorProject profit margin, residual land value, and break-even sales price for a small development.
Open calculatorTrue cost of moving up or down: agent fees, legals, moving costs, and new mortgage repayments.
Open calculatorHow a council CV revaluation changes your rates, plus the implied market value movement.
Open calculatorLikely agent commission on a NZ property sale at the standard tiered rates.
Open calculatorCommercial property buys, accessing the equity in your home, and reverse mortgages.
Yield, cashflow and lender requirements for buying NZ commercial property.
Open calculatorUsable equity in your home after the bank's 20% buffer.
Open calculatorHow a reverse mortgage works, the equity you can access, and the long-term cost.
Open calculatorFor renters: affordability, bond, and ongoing utility costs.
What weekly rent fits within the standard 30%-of-income guideline used by most landlords.
Open calculatorMaximum bond a NZ landlord can charge (4 weeks rent) and refund process.
Open calculatorCouncil rates and water charges by NZ region for typical home sizes.
Open calculatorMost NZ home loans are split between fixed terms (commonly 1, 2 or 3 years) and a smaller floating portion. Fixed gives certainty and is usually slightly cheaper, floating gives flexibility to make extra repayments without break fees. The right split depends on your appetite for risk and how soon you might want to repay extra.
The Reserve Bank limits how much banks can lend at high loan-to-value ratios. Owner-occupiers usually need at least a 20% deposit to avoid low-equity charges, although exceptions exist for first home buyers and new builds. Investors generally need 30% or more. Check the LVR calculator for context.
Banks do not assess your loan at the rate you actually get. They stress-test your serviceability at a higher "test rate", typically 1.5 to 3 percentage points above the current rate, so they know you can still afford the loan if rates rise. This is why your borrowing capacity is often lower than the headline rate would suggest.
Switching from monthly to fortnightly repayments alone can shave roughly four years off a 30-year loan. The reason is that 26 fortnights per year amounts to 13 monthly payments instead of 12. Most NZ banks default to fortnightly aligned to your payday for this reason.
If you break a fixed-rate loan early to refinance or pay off a lump sum above the bank's limit, you may pay a break fee that compensates the bank for the lost interest. Break fees can range from negligible to many thousands of dollars depending on how much rates have moved. The break fee calculator will help you size it.
Total interest over a 30-year mortgage typically exceeds the original loan amount, often by a wide margin at rates above 5%. That is the single most useful thing the repayment calculator shows you, and the reason small changes (a slightly shorter term, fortnightly vs monthly, the occasional lump sum) compound into significant savings over the life of the loan.