CSB Mortgages

Mortgage Calculators

All figures are indicative only and do not constitute financial advice. Speak with your CSB adviser for a personalised assessment.

Most popular

Repayment Calculator

Work out weekly, fortnightly, or monthly repayments on any loan amount, rate, and term.

Borrowing Power

Estimate how much a lender may approve based on your income, expenses, and deposit.

Overpayment Calculator

Already have a mortgage? Enter your remaining balance and see how extra payments cut your interest and term.

More calculators

Refinance & Break Cost

Compare a new lender's offer against your current loan — including break costs, fees, and cashback — and see the payback period.

First Home Buyer

KiwiSaver withdrawal, HomeStart grant eligibility, LVR, and deposit all in one.

Interest-Only vs P&I

Compare interest-only repayments against principal & interest side by side.

Lump Sum Payment

See the impact of a one-off payment on your loan balance and term.

Offset Account

Calculate how much your savings offset against your mortgage saves you.

Revolving Credit

See daily interest calculations, how much your salary reduces your balance, and your true savings vs a standard mortgage.