Refinance — Case Study

Refinance Saves
$408 a Month — and 6 Years.

A Wellington family stuck on a costly 7.9% revert rate was switched to a competitive fix in 10 days — saving $408 every month and cutting 6 years off their loan.

$408
Saved / Month
6 yrs
Loan Shortened
0.9%
Rate Reduced
$118K
Interest Saved
10 days
To Complete

The problem.

Mark and Sarah had a $580,000 mortgage with BNZ. Their 2-year fixed term rolled off in January 2025 — and without acting promptly, they slipped automatically onto the bank's floating revert rate of 7.9%. Three months passed before they reached out to Finch, by which point they'd already paid thousands more in interest than necessary.

Like many homeowners, they'd always dealt with their bank directly and hadn't realised a broker could access significantly better rates across 20+ lenders simultaneously. They assumed the rate their bank offered was "just what it is."

They came to Finch after a colleague mentioned saving $300/month by switching lenders. The initial analysis Finch ran showed their potential saving was even higher.

How we solved it.

1
Full rate comparison across 12 lendersWe ran a comprehensive comparison of all competing lenders' current rates and cash-back offers, identifying the best net outcome across both rate and incentives.
2
Negotiated a $3,000 cash-backThe new lender offered a $3,000 refinance cash-back incentive. This covered Mark and Sarah's legal fees and discharge costs — making the switch cost-neutral from day one.
3
Strategic split rate structureRather than locking the full amount into one term, we split the loan: 50% on a 1-year fix at 6.89%, 50% on a 2-year fix at 7.0%. This hedges against further rate changes while still capturing the savings.
4
Redirected savings to reduce termWe set up the loan so the $408/month saving flows automatically into an offset account, which the couple applies as extra principal repayments — cutting 6 years off the remaining term.

The result.

The entire switch was completed in 10 working days — before Mark and Sarah's next payment cycle. They went from 7.9% floating to a blended rate of approximately 6.95% fixed, saving $408/month from the very first repayment.

By applying that saving toward extra principal, the remaining 22-year loan term shortens to 16 years. Over the full term, total interest saved is approximately $118,000.

The $3,000 cashback covered all switching costs. The net Day 1 cost of refinancing was zero.

"We had no idea we could save this much just by switching lenders. Finch handled everything — we literally just signed a few forms. Best financial decision we've made."
— Mark & Sarah, Wellington, Refinance Clients

Are you paying a revert rate?

If your fixed term expired in the last 6 months and you haven't reviewed your rate, you're almost certainly overpaying. Finch will run a free comparison and show you exactly what you could save.

Explore Refinancing → Book a Free Review