Home loan channeling is the practice of routing your income — your salary, your business takings, any money that hits your account — through a specific part of your mortgage, instead of through a standard transaction account.

That specific part is usually a revolving credit facility (sometimes called a flexi loan, orbit, or rapid repay account, depending on the bank). It behaves like a giant overdraft that’s secured against your home. And here’s the key:

Every dollar that sits in it, even for one day, is a dollar of mortgage the bank isn’t charging you interest on — because interest is calculated on the daily balance, not the monthly average.

So if your salary lands on the 20th and your rent, groceries and bills don’t go out until the 25th, 28th and 1st, those dollars have spent a week reducing the balance of your home loan. The bank charges interest on a smaller number. You don’t do anything different — you still pay your bills, you still live your life. The money just does a little bit of work on the way through.

Do that every pay cycle, every month, for the life of the loan, and the compounding effect can be significant.

How it actually works — a simple example

Let’s keep the numbers simple. Meet Sarah. She has a $600,000 home loan and earns $7,000 a month after tax. Her mortgage is currently set up as one big fixed-rate loan with an automatic payment going to the bank on the 25th of each month.

The usual setup

Sarah’s $7,000 salary lands in her everyday account on the 20th. It sits there, earning approximately zero, until she pays her bills throughout the month. The bank charges her interest on the full $600,000 home loan balance every day, regardless of how much money is sitting in her account.

The channeling setup

Her adviser restructures her loan into two parts: a smaller revolving credit facility (say $50,000), and a larger fixed-rate loan (the remaining $550,000). Her salary now gets deposited straight into the revolving credit account, which immediately reduces that account’s balance by $7,000.

She still pays all her bills from the revolving credit account, just as she did before. But for the days her salary is sitting in that account before being spent, the bank is charging her interest on less. Not dramatically less on any single day — but every single day, for the rest of her loan.

Over the lifetime of the loan, that daily shaving-off compounds. The effect is that a portion of her interest bill — and the term of her loan — can be meaningfully reduced, without her changing how much she earns or how much she spends.

The power of channeling doesn’t come from any single day. It comes from doing it on every dollar, every day, for decades. Small amounts, multiplied by time, compound.

The three parts of a channeled mortgage

Most channeled home loan structures have three moving parts:

1. The fixed-rate portion

The biggest chunk. This is the part that behaves like a normal mortgage — fixed rate, regular payments, locked in for 1 to 5 years. It gives you repayment certainty and the lowest interest rate. You don’t touch it day-to-day.

2. The revolving credit facility

A smaller portion (often 5–15% of the total loan) set up as a revolving credit. This is where your income lands and where your spending flows from. Interest rate here is usually higher than the fixed portion — but it’s calculated daily, so the more your income sits there, the less you pay.

3. Your everyday habits

The part most people forget. Channeling only works if you actually route money through the revolving credit account. That means changing your salary direct deposit details, pointing your auto-debits at the right account, and being disciplined about not pulling extra cash out. The setup is a 5-minute change. The habit is the hard part.

Why doesn’t the bank just tell me about this?

A fair question. The short answer: banks earn money on the interest you pay. They don’t have strong commercial incentive to proactively help you pay less of it.

The longer answer: the products exist (every major NZ bank offers a revolving credit facility), and any bank will set one up if you ask for it. But without someone walking you through the structure, it’s hard to know what to ask for — or to realise that the default mortgage structure you were given when you bought your home is not the most efficient one available.

That’s the gap most homeowners fall into. Not because they’re bad with money — because nobody told them there was a better version of the same loan they already have.

Who is home loan channeling actually for?

Channeling isn’t for everyone. It works best for people who tick most of these boxes:

• You own a home with a mortgage (owner-occupied or investment).
• You have a regular income that hits your account predictably.
• You spend less than you earn each month — even a little.
• You’re disciplined enough to not treat a revolving credit account as ‘spare money’.
• You’re planning to stay in the property for at least a few more years.

It tends not to work well for:

• People who live paycheque to paycheque with no buffer (there’s nothing to channel).
• People with inconsistent income who struggle to track their spending.
• People who see a revolving credit account and immediately draw it down for a holiday.
• Fixed-rate loans that are locked in for years with painful break fees (worth waiting for the right moment).

A good adviser will tell you if channeling isn’t right for you. If your situation doesn’t suit it, there are usually other structures — offset arrangements, lump-sum repayments, rate renegotiation — that might suit you better.

What each major New Zealand bank offers

Every major NZ bank has a revolving credit product. The names change, the mechanics are nearly identical:

The mechanics are broadly similar across all five. What differs is the interest rate on the revolving portion, the fees, the minimum/maximum limits, and how smoothly they integrate with offset accounts. That’s where an adviser does the comparison work — matching your situation to the bank that best supports the structure.

Common mistakes (and how to avoid them)

Mistake 1: Making the revolving credit facility too big

A revolving credit rate is usually higher than a standard fixed rate. If your revolving portion is larger than your monthly cash buffer can pay down, you’re effectively paying a premium rate on debt that could sit on the cheaper fixed loan. The rule of thumb: your revolving credit limit should be close to your monthly income, not several times it.

Mistake 2: Treating revolving credit as spending money

The facility behaves like an overdraft — you can draw on it any time. That’s the feature. It’s also the trap. If you look at a $50,000 limit and see $50,000 of ‘available cash’, channeling stops working. The discipline of only drawing what you were already going to spend is what makes the whole thing effective.

Mistake 3: Forgetting to actually change the salary deposit

It sounds obvious, but we’ve seen it many times: people set up the structure, then forget to tell their payroll the new account number. Salary keeps landing in the old account, channeling never happens, and 12 months later they wonder why nothing’s moved. The structural change is 5 minutes at your bank; the deposit change is 2 minutes with HR. Both have to happen.

Mistake 4: Not reviewing annually

Your income changes. Your spending changes. Your rates come off fixed and need renegotiating. A channeling setup that was perfect two years ago may need tweaking today. Build in a yearly review — it’s the cheapest, highest-leverage habit in your financial life.

How to set it up — step by step

If you decide channeling is right for you, here’s roughly what the process looks like:

• Step 1. Get a free assessment. An adviser reviews your current loan structure, your income pattern, and your spending, and models whether channeling would meaningfully benefit you.
• Step 2. Choose the bank. If you’re already with a bank whose revolving credit product suits you, great — often no switch is needed. If not, a refinance or internal restructure may be recommended.
• Step 3. Restructure the loan. Your fixed-rate loan is split: one larger fixed portion, one smaller revolving portion. Signed paperwork, a few days of bank processing.
• Step 4. Redirect your income. Update your salary deposit, your auto-debits, your spending flows so they go through the revolving account.
• Step 5. Review yearly. Recheck the structure each year, especially when fixed rates roll off.

Most of the work sits in steps 1 and 2 — choosing the right structure for your actual life. Once set up, it runs quietly in the background.

Curious whether channeling would work for you?

A free, no-obligation 20-minute chat. We’ll look at your actual numbers and tell you honestly whether this is worth doing — or whether a different strategy suits you better.Book your free review →

This guide is general information and does not take your personal situation into account. It is not personalised financial advice. Any specific outcomes of a channeling strategy depend on your individual circumstances, including your income, spending, interest rates, loan balance, and how consistently you apply the structure.

Lending is always subject to the bank’s credit criteria, fees, and terms and conditions. Interest rates, product availability and features change over time. Verify current product details with your bank or adviser before making a decision.

Homelend is a Financial Advice Provider. For full disclosure information, visit homelend.co.nz/disclosure.