Borrowing Power · 3 August 2026
Being self-employed does not make you a harder borrower. It makes your income a harder number to read, and the number a lender reads has three problems a salary never has.
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Lenders start from the net profit in your finalised business financial statements, cross-checked against your IRD records, not from what you pay yourself or draw out of the business. They then adjust it: adding back non-cash or one-off items such as depreciation, and, if you trade through a company, looking at your shareholder salary alongside the company result. Drawings do not count as income. Most main banks want two years of finalised statements as their default, with the matching IRD assessments and recent business bank statements.
That is the mechanical answer, and it is where nearly every explanation of this topic stops. It is also not the part that catches people out. Self-employed applications get declined far less often because the business is weak than because of what happens to the number in between your trading and the lender's assessment. There are three separate things going on, they have three different fixes, and none of the fixes is a bigger deposit.
A salaried applicant hands over a payslip. The figure is current, it is not optimised for anything, and every lender reads it the same way. A self-employed applicant hands over financial statements, and all three of those things stop being true at once.
| The problem | Why it happens | What actually helps |
|---|---|---|
| It is small | Tax planning is designed to reduce the exact figure a lender reads. | Deciding earlier, before the relevant years are closed. |
| It is old | Balance dates and filing extensions put a long lag on finalised accounts. | Getting accounts finalised early, and interim accounts where a lender accepts them. |
| It is not one number | Lenders differ on averaging and on which add-backs they allow. | Matching the application to the lender whose method suits your pattern. |
Your accountant's job, done well, is to legitimately reduce your taxable profit. Your lender's assessment reads that same taxable profit and treats it as your income. Two capable professionals are therefore optimising one number in opposite directions, usually without ever speaking to each other, and the borrower is the only person who can see both sides.
This is not an argument for paying more tax, and it is certainly not an argument for overstating anything. It is an argument about sequence. By the time you sit down to apply, the financial years a lender will read are already closed and filed. The decisions that shaped them were made one, two and three years earlier. A conversation about what a mortgage application will need is worth having while those years are still open, which for most people means well before they start looking at houses.
Add-backs recover part of the gap. Depreciation is a book entry rather than money leaving the business, so lenders will often add it back. One-off costs and some home office claims may be treated the same way. This is genuinely useful, and it is also the reason it pays to have complete financials rather than a summary: an add-back a lender cannot see is an add-back you do not get.
This is the one almost nobody mentions, and it changes when it makes sense to apply at all.
The standard New Zealand balance date is 31 March (Source: Inland Revenue). A return without an extension of time is due on 7 July, but returns filed through a tax agent under an extension of time can be due as late as 31 March the following year (Source: Inland Revenue). Put those two facts together and a trading year that ended on 31 March can still be unfinalised nearly twelve months later.
The consequences run in both directions, which is why it is worth thinking about rather than just knowing. If your business has been improving, the lag works against you and getting your accounts finalised early is one of the highest-value things you can do before applying. If your last finalised year was your strongest and trading has since softened, the lag is temporarily on your side, and lenders asking for interim or management accounts will see the softer picture anyway.
Interim accounts are the usual bridge. Whether a lender will use them, and how much weight they carry, varies. In our experience at Trebla, the self-employed clients who get the cleanest outcomes are not the ones with the best businesses, they are the ones whose accountant knew a mortgage application was coming and finalised the year promptly instead of using the full extension.
There is no single self-employed income figure. There is a set of financial statements, and each lender's credit policy turns them into a number using its own method.
Some lenders assess the most recent finalised year. Others average the last two. Others take the lower of the two. If your two years are similar this barely matters. If one year is much stronger, the choice of method can move the assessable figure substantially.
Depreciation is widely added back. Beyond that, treatment of one-off costs, home office claims and interest varies. The same statements can therefore produce different assessable income depending on who is reading them.
Sole trader, partnership, company, look-through company and trading trust all present the numbers differently. Where a company is involved, shareholder salary and the company result are usually considered together, and how retained profit is treated is a policy question rather than a fixed rule.
Two years of finalised statements is the common default, not a legal requirement. Some lenders will consider a shorter history where there is relevant industry experience behind it. This is one of the widest points of difference across the market.
The practical implication is worth stating plainly: a decline from one bank tells you about that bank's method, not about your business. Testing your position across the market before an application goes anywhere is the difference this makes, and it is a large part of why self-employed borrowers use an adviser at all. We set out the trade-offs of each route in using a mortgage broker versus going direct to a bank.
All of the above changes one input, and it is worth being precise about which. Your borrowing limit is the lowest of three separate ceilings: your deposit and the resulting loan-to-value ratio, the debt-to-income limits, and the lender's own test of whether you can afford the repayments. Whichever sits lowest is the one that decides your loan.
Self-employment does not touch the deposit ceiling. It changes the income figure that feeds the other two, which is why a bigger deposit does not repair a low assessed income. It matters on the debt-to-income side because those limits are set against gross income, with most owner-occupier lending capped at six times gross income and banks able to write a limited share of new lending above that (Source: RBNZ). It matters even more on the servicing side, where the assessed figure is run through the lender's affordability test.
The full framework, including how the three ceilings interact, is set out in our guide to how much you can actually borrow in New Zealand. You can sketch your own position with the borrowing power calculator and the LVR and DTI calculator, then have the income side checked properly against real lender policies before anything is submitted.
Lenders generally start from the net profit in your finalised financial statements, cross-checked against IRD records, rather than from what you pay yourself or draw out. They may add back non-cash or one-off items such as depreciation, and where you trade through a company they usually look at shareholder salary alongside the company result. Drawings are not treated as income. Which add-backs apply, and whether the latest year or an average is used, differs by lender.
Two years of finalised statements is the common default at the main banks, with matching IRD assessments and recent business bank statements. It is a credit policy setting rather than a legal requirement, so it varies. Some lenders will consider a shorter trading history where there is relevant industry experience behind it, sometimes supported by interim accounts. Worth confirming with a specific lender before applying.
Because lenders read the same profit figure your tax planning is designed to reduce. Legitimate deductions lower taxable profit, which lowers the income a lender assesses, which lowers the loan approved. Your accountant and your lender are optimising one number in opposite directions. The practical answer is timing, because the years a lender reads are usually closed by the time you apply.
Often older than people expect. The standard balance date is 31 March (Source: Inland Revenue), and returns filed through a tax agent under an extension of time can be due as late as 31 March the following year (Source: Inland Revenue). A trading year can be well over a year finished before it is finalised, so a strong recent year may not be visible yet. Interim accounts sometimes bridge the gap, depending on the lender.
Not automatically. Deposit requirements come from loan-to-value rules and lender credit policy, not from employment type on its own. Self-employment mainly affects how your income is measured, which drives the servicing and debt-to-income ceilings. A larger deposit does not fix a low assessed income, because the lowest ceiling is the one that decides the loan.
Yes, and the gap can be material. Lenders differ on whether they use the most recent year, an average of two, or the lower of the two, and on which add-backs they allow. The same statements can produce noticeably different assessable income at different lenders, which is why a decline from one bank is a statement about that bank's method rather than a verdict on your business.
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This article is general in nature and is not financial advice, and it is not tax or accounting advice. Lending criteria, lender policies, and tax rules vary and change regularly. Always seek advice specific to your situation before making decisions. For guidance tailored to you, talk to Trebla Partners Limited (FSP728251) or book a free chat at book.trebla.nz/book. Read our disclosure statement →
