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Home loan channelling calculator.

Channelling routes your salary through a revolving credit facility instead of a transaction account, so every dollar sits against your mortgage for longer. This tool estimates the effect using current New Zealand income tax and ACC earner levy settings.

Start with your numbers ↓

Your numbers

Adjust the sliders — results update live.

Revolving credit portion
Broken out from fixed into revolving credit.
Living costs only — exclude the mortgage repayment.

With channelling

$0
estimated additional interest reduction
0
earlier than equal extra repayments
Same extra repayments
30 yrs
$0 interest
$0/mo
With channelling
0 yrs
$0 interest
$0/mo

Visual comparison

Remaining balance over time

Same extra repayments With channelling Balance difference

How it works

1 · Keep the bulk on fixedMost of your mortgage stays on a fixed rate for security and predictability.
2 · Break out a revolving chunkA smaller portion moves into a revolving credit facility linked to your everyday account.
3 · Channel your salaryIncome goes straight in, reducing the balance daily. Bills come out as normal.
4 · Clear it, repeatOnce paid off, break out another chunk from fixed. Repeat until mortgage-free.

The comparison gives the standard fixed loan the same monthly repayment budget as the channelling path. It reports ordinary extra repayment savings separately, then compares the remaining fixed loan with the split fixed and revolving structure. Tax settings use current Inland Revenue individual income tax rates and the 2026 to 2027 ACC earners levy. Last reviewed 27 July 2026.

Want this for real?

We'll run your actual numbers.

A no-obligation chat with a Homelend adviser. Not every bank offers a revolving product worth channelling into — we'll tell you straight whether yours does.

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This calculator provides estimates only and does not constitute financial advice. It separates ordinary extra repayment savings from the additional difference produced by the modelled fixed and revolving structure. The salary timing component is an approximation, not a daily transaction simulation. It excludes KiwiSaver, student loan deductions, tax credits and other payroll deductions. Actual results depend on your loan structure, lender, spending patterns and interest rates. Homelend advisers provide advice under Lift Capitals Limited (FSP754351).