Does Financing New Plant Shrink Your One Doc Borrowing Power?
Plant Finance and One Doc Borrowing (2026) | Switchboard Finance
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One Doc Home Loan · Plant Finance · Borrowing Power
Does Financing New Plant Shrink Your One Doc Borrowing Power?
You have found the machine and the supplier wants a deposit, but you also want to buy or refinance the family home this year. Financing the plant moves your borrowing power in two directions at once. Here is how the serviceability read actually lands.
Quick Answer
Financing new plant adds a repayment a lender treats as a current commitment, which can trim borrowing power. But a One Doc Home Loan reads your business cash flow, so the depreciation add-back restores much of what the commitment takes in the servicing read.
Does financing new plant shrink your One Doc borrowing power?
Financing new plant can shrink your borrowing power, but on a One Doc Home Loan the effect is rarely as blunt as it first looks. There are two forces working at the same time, and they pull in opposite directions. The new repayment counts as a current commitment, which pushes capacity down. The depreciation on that same plant is a non-cash deduction, and on a cash-flow read the depreciation add-back can be restored, which pushes capacity back up.
This is the dual effect that catches manufacturers out. A bigger machine looks like a bigger drag on the home loan, but the asset that creates the repayment also creates the deduction that a One Doc lender can add back. Whether you end up ahead or behind depends on the size of the repayment against your trading cash flow, not on a single rule of thumb. Where this commonly lands, two numbers, not one, decide the outcome.
It helps to be clear on what a One Doc product is doing differently. A full-doc bank loan leans on your personal tax returns, where the plant has already reduced your taxable income through depreciation. A One Doc loan is assessed on business cash flow, not taxable income, which is exactly why the add-back is on the table. That difference is the whole reason this question has a more forgiving answer for self-employed manufacturers than it does for a salaried buyer.
How a One Doc lender reads your business cash flow
A One Doc lender starts from what the trading entity actually generates, then works toward a serviceable home loan from there. Instead of a stack of personal returns, the read typically rests on a BAS or accountant letter that supports a self-declared income figure. The income picture is built around cash that moves through the business, which is a meaningfully different lens to the one a major bank applies when it reads your notice of assessment.
Because the read is cash-flow first, non-cash items are treated differently. Depreciation, interest add-backs and one-off expenses can be adjusted out so the lender sees closer to the real earning capacity of the business. You can see how the closing-year income picture feeds the same read in our companion piece on how your closing BAS year resets One Doc borrowing power. The principle is the same: the cleaner and more consistent the cash-flow story, the better the read.
It is also worth knowing where the assessment sits in the regulatory picture. The serviceability buffer that the regulator sets applies to banks and other authorised deposit-taking institutions. As the prudential regulator APRA frames its lending standards, those buffers govern the regulated bank channel. Non-bank One Doc and alt-doc lenders set their own assessment policy and sit outside that direct buffer, which is one reason a self-employed manufacturer who does not fit a bank template can still find a workable structure.
The depreciation add-back that works in your favour
The depreciation add-back is the lever that keeps a plant purchase from quietly eating your home loan capacity. When you buy a press, a CNC or a production line, that asset is depreciated over time rather than expensed in one hit. Most factory plant costs well above the threshold for the instant asset write-off, so the plant goes into the small business depreciation pool rather than being written off immediately. The instant asset write-off, proposed permanent from 1 July 2026 but not yet law, eases the old end-of-year deadline pressure, but it does not change how a large machine is treated: it depreciates.
That depreciation is a real deduction on your tax return, yet no cash leaves the business when it is claimed. On a cash-flow read, that is the point. The depreciation add-back can be restored in the read, so the income figure a One Doc lender works with is not dragged down by a deduction that never cost you cash. What looks like a profit dip on paper can be largely an accounting effect, and a cash-flow lender is built to see through it.
This is the mechanic worth documenting before you commit to the machine. The repayment will show as a liability, but the depreciation it generates can be added back on the income side. How those two move against each other is the call that decides whether your borrowing power holds.
Where the new asset finance commitment counts against you
None of this means the commitment is free. The repayment counts as a current commitment on every serviceability read, and combined commitments reduce borrowing capacity, indicative and varies by lender. If you already carry equipment finance, a vehicle facility or a trade line, each repayment stacks against the same capacity the home loan needs. The add-back helps the income side; it does nothing to remove the liability side.
Structure matters here as much as size. A repayment that sits inside the trading entity reads differently to one taken in your personal name, and a facility nearing its end carries less weight than one just written. This is also where sequencing with other equity moves comes in: if you are weighing a property-backed step as well, our note on whether a second mortgage will block your One Doc home loan later walks through how stacked debt changes the order you should borrow in.
The table below sets out where the read passes comfortably and where it starts to fail. None of these are settled rules; they are the patterns that decide whether the commitment is absorbed or whether it bites.
| What matters | Where the read passes | Where the read fails |
|---|---|---|
| Depreciation | The plant depreciates through the pool, so the add-back is available | Income has been stripped low with little add-back to restore it |
| Cash flow | Business cash flow comfortably covers the new repayment and the proposed home loan | The new repayment stretches cash flow with no headroom left |
| Evidence | BAS and bank statements tell a clean, consistent story | The cash-flow story is patchy or hard to evidence |
| Structure | The repayment sits inside the trading entity, not your personal name | The plant is bought in personal name, so the repayment hits you directly |
| Other commitments | Other commitments are modest or close to paid out | Several recent commitments stack against the same capacity |
Timing the plant buy around your home loan plans
Because that cliff looks set to ease from 1 July 2026, subject to the measure passing, the smart move is to time the plant buy to the business rather than to a tax deadline, then sequence the home loan around it. The current 2025-26 write-off still runs to 30 June 2026. If the home loan is the nearer priority, it can be worth settling that before the new commitment lands, so the read is taken before capacity is trimmed. If the plant cannot wait, the add-back conversation becomes the one to have early, so the income side is built properly from the start.
This is exactly the kind of file where a broker route earns its keep. Matching the equipment facility, the trading structure and the home loan into one coherent story is how the serviceability read actually lands in your favour rather than against you. If you want the full manufacturer playbook on stacking these facilities, the manufacturing hub and the manufacturing loan pack map out how the pieces fit together across a plant-purchase year.
The practical takeaway is to treat the plant and the home loan as one decision, not two. The asset that adds a commitment also adds a deduction, and on a One Doc read those two can come close to cancelling out. Knowing which way your file leans before you sign the supplier order is the difference between a clean approval and an avoidable surprise.
Financing new plant does add a repayment that a lender counts as a current commitment, so on the face of it your borrowing power drops. But a One Doc Home Loan is read on business cash flow, where the depreciation add-back from that same plant can be restored, offsetting much of the hit. The plant that costs you a repayment also generates the deduction that supports your income, and how those two move against each other decides the outcome.
Key takeaway: Treat the plant purchase and the home loan as one decision, and size the commitment against your cash flow and add-backs before you sign.Frequently Asked Questions
A new equipment loan can reduce your home loan borrowing capacity, because the repayment is counted as a current commitment when a lender works out what you can service. On a One Doc Home Loan, the read is built on business cash flow, so the depreciation add-back often restores a meaningful part of that capacity, indicative and varies by lender. The net effect depends on the size of the repayment against your cash flow and add-backs.
A One Doc home loan assesses a self-employed borrower on business cash flow and a self-declaration of income, not on full personal tax returns. It typically relies on a BAS or accountant letter to support the income picture, and the servicing read leans on what the trading entity actually generates, indicative and varies by lender.
A depreciation add-back is the practice of restoring non-cash depreciation deductions to your income when a lender reads serviceability. It matters because the plant you depreciate through the small business pool, which can include assets bought ahead of EOFY under the instant asset write-off rules, reduces taxable profit without reducing cash, so a lender that reads business cash flow can add it back.
You can buy new plant and still get a One Doc home loan before EOFY in many cases, but the order of events matters because the new repayment lands as a current commitment. Sequencing the plant purchase and the home loan around your closing BAS year can change the read, as our note on how your closing BAS year resets borrowing power explains, which is why timing the two together is worth a conversation before you commit.
Non-bank One Doc lenders do not all use the same serviceability buffer as the banks, because the regulated buffer applies to authorised deposit-taking institutions. Non-bank and specialist funders set their own assessment policy, which is one reason a self-employed borrower turned away by a major bank can still find a workable structure through an alt-doc route, indicative and varies by lender.
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