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Which bank is best for self-employed people who already have a mortgage and uneven income?
For a self-employed person in New Zealand who already has a mortgage and earns an uneven income, I wouldn't choose a bank based on its advertised mortgage rate alone. I'd prioritise flexible cash flow, low fees, access to savings, and how well the bank accommodates self-employed borrowers.
The best option may be different for someone whose income is seasonal, someone who invoices clients and waits weeks to get paid, or someone whose annual income is healthy but whose monthly income fluctuates.
What matters most for your situation
- A flexible mortgage: The ability to make extra repayments when business is good without excessive break fees or restrictions.
- A cash buffer: Keeping enough money accessible to cover your mortgage and essential bills during quieter months.
- An offset or revolving-credit facility: Potentially reducing mortgage interest while keeping cash accessible for business expenses.
- Business-friendly banking: Reasonable transaction fees, easy tax-payment management and separate business and personal accounts.
- Lending flexibility: If you need to refinance or borrow more later, the bank's approach to assessing self-employed income matters.
My shortlist of New Zealand banks
1. Kiwibank
Best starting point
Best for managing irregular income with an offset mortgage.
Kiwibank specifically describes its offset home loan as useful for irregular income. You can use eligible linked personal accounts to reduce the mortgage balance on which interest is calculated, while keeping the money accessible. Business accounts are excluded from the eligible linked accounts for new offset loans. Offset home loan | Home loans
Explore Kiwibank offset mortgages
2. ASB
Best if you want a flexible mortgage with redraw access.
ASB's Orbit revolving-credit home loan lets you pay money into the loan when cash comes in, then redraw funds within your approved limit. This can suit variable business cash flow, although you need discipline to avoid continually reusing the credit. Does ASB offer a mortgage offset account?
3. BNZ
Best if you want to offset your mortgage using everyday savings.
BNZ's TotalMoney offsets eligible linked transaction-account balances against your mortgage for interest calculations. It is worth comparing if you regularly build up cash between invoices or during busy seasons. TotalMoney home loans - Offset mortgages
4. ANZ
Worth comparing if your personal and business banking are closely connected.
ANZ accepts accountant-prepared financial statements as evidence of self-employed income. Ask it to compare your existing mortgage structure with available flexible options, and whether any business banking package offers meaningful benefits for your situation. How to apply for a Home Loan
These are a shortlist based on product features, not a definitive ranking of approval rates or total costs. The right choice depends on your existing mortgage terms and how much cash you typically hold.
Which mortgage structure is likely to suit you?
| Your circumstances | Option to investigate |
|---|---|
| Income arrives in large, irregular payments | Offset mortgage |
| You need to draw cash back for expenses | Revolving credit |
| You prefer predictable repayments | Mostly fixed-rate mortgage plus a smaller flexible portion |
| You regularly hold substantial business cash | Compare business and personal account arrangements carefully |
One important caution: If you have a fixed-rate mortgage, moving to a different structure or switching banks may trigger break costs or other fees. Ask for a full cost comparison before refinancing.
What I'd do in your position
I'd start by comparing Kiwibank's offset option with ASB Orbit and BNZ TotalMoney. I'd also ask each bank how it assesses self-employed income if I wanted to top up or refinance later. BNZ, for example, requests the business's latest two annual financial statements for self-employed mortgage applications. Preparing for a home loan appointmentRefinancing your home loan
To narrow this down to the best fit for you, one question:
How do you usually get paid?
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Captured 11 October 2026