How alt doc home loans work in Australia: who they suit, which business records replace tax returns, why they cost more and when to move to full doc.
Business Owners Hub
Alt Doc Home Loan · Eligibility · Pricing
An alt doc home loan verifies self-employed income from business records instead of personal tax returns. Here is who it suits, what it asks for, why it costs more and when to move to full doc.
Quick Answer
An alt doc home loan lets a self-employed borrower prove income with business records such as BAS, business bank statements or an accountant letter instead of personal tax returns, in exchange for a lower maximum loan size and usually a higher rate. It suits a real, trading business whose lodged returns lag behind or understate current income, and most borrowers treat it as a bridge to a cheaper full doc loan once their returns catch up. If you would rather rest the application on a single document, the One Doc home loan is the related path.
Also called: alternative documentation home loan, alt doc mortgage, low doc home loan. "Low doc" is often used for the same loan; some lenders reserve "low doc" for loans resting on a signed income declaration and "alt doc" for loans resting on BAS, bank statements or an accountant letter.
What is an alt doc home loan?
An alt doc home loan is a regulated home loan that verifies a self-employed borrower's income from business records instead of personal tax returns, and the trade-off is priced into the rate, the deposit and the insurance. "Alt doc" is short for alternative documentation. The loan funds the same things a standard home loan funds: buying a home or an investment property, or refinancing an existing mortgage. What changes is the evidence behind the income figure.
An alt doc loan is still a verified loan. Under the responsible lending obligations, lenders and brokers must take reasonable steps to verify a borrower's financial situation before credit is provided, and that duty does not switch off because the tax returns are missing. ASIC's responsible lending guidance sets out that obligation at the time of writing. The lender simply verifies from different paperwork: the business's own trading records, checked against each other.
The alt doc home loan glossary entry covers the short definition, the documents that qualify and the LVR question. Where alt doc sits beside low doc, one doc and no doc is answered in the One Doc home loan guide, and the finer line between low doc and alt doc evidence is drawn in how low doc lenders read income evidence.
Who are alt doc home loans designed for?
Alt doc home loans are designed for self-employed borrowers whose business is real and trading but whose lodged tax returns either lag behind or understate what the business earns today. The product exists for the gap between how a business is performing and what the last lodged return says about it.
Typical files include a business that has grown quickly, where the latest return still shows last year's smaller figure; an owner whose returns are a year behind because the accountant is still finalising them; a business that has changed structure, from sole trader to company for example, so the history is split across two entities; and a business whose legitimate write-offs make taxable income look lower than the cash the owner actually draws. Business owners in all of these positions are the core of the Business Owners Hub.
The test between the two is simple: if your lodged returns already show the income you need, full doc is usually cheaper and opens more lenders. Alt doc earns its higher cost only when the returns cannot carry the application.
Suits alt doc
- Trading income has grown past the last lodged return
- Tax returns are behind but BAS is up to date
- Business recently restructured into a new entity
- Clean business bank account and consistent deposits
Suits full doc
- Two recent lodged returns already show the income
- Notices of assessment match what you earn
- You want the widest lender choice and sharpest pricing
- You plan a high LVR purchase
For buyers in Sydney, the non-bank options for this kind of file are mapped in low doc home loans in Sydney.
What documents replace tax returns on an alt doc home loan?
On an alt doc home loan, some combination of BAS, business bank statements, an accountant letter and a signed income declaration replaces the personal tax returns, usually covering six to twelve months of records, though the period varies by lender. Each lender sets its own menu, and most ask for two of these working together rather than one alone.
- Business activity statements. Your lodged BAS shows turnover the ATO already holds on record, which is why lenders trust it.
- Business bank statements. Bank statements show the money actually arriving, and lenders read deposits, regularity and how the account is run.
- An accountant letter. An accountant letter confirms your income from someone who has seen the books, in a format the lender sets.
- A signed income declaration. Your own statement of income, which the other documents then need to support.
The first thing an assessor checks is whether the documents agree with each other. BAS turnover that roughly matches the deposits in the bank account, and an income declaration that sits sensibly inside that turnover, reads as a clean file. Figures that drift apart prompt questions. The document-by-document detail, including how many periods lenders ask for, sits in the low doc home loan income documents guide.
What do you need to qualify for an alt doc home loan?
To qualify for an alt doc home loan you typically need an active ABN with a trading history, GST registration at many lenders, a clean or well explained credit file, a deposit, and business records that support the income you declare. The thresholds for each of these vary by lender, so the same file can fit one lender's policy and miss another's.
- ABN and trading history. An ABN shows how long you have traded. How short a history is acceptable is covered in the alt doc vs one doc comparison.
- GST registration. Many lenders want GST registration because it means lodged BAS exists to verify turnover.
- Credit conduct. Your credit file carries more weight when the income evidence is lighter.
- Deposit and security. A larger deposit lowers the LVR, which widens the lenders who will consider the file.
Where this commonly lands is a trade between the four: a stronger deposit can offset a shorter history, and clean conduct can offset lighter paperwork, within each lender's limits.
How much can you borrow on an alt doc home loan?
How much you can borrow on an alt doc home loan is set by two limits: a lower maximum LVR than full doc, varies by lender, and the repayments the verified income can carry once the lender's serviceability buffer is applied. The smaller of the two answers is your loan.
The loan-to-value ratio caps the loan against the property. Alt doc caps usually sit below full doc caps, and above a certain LVR the lender typically requires lenders mortgage insurance, which some lenders will arrange on alt doc and others will not. The servicing side tests the declared income against the new repayments at a buffered rate; how that test runs on a self-employed file is set out in the responsible lending assessment for self-employed home loans. For a rough first figure, the borrowing power calculator gives an indicative range.
| Factor | Alt doc home loan | Full doc home loan |
|---|---|---|
| Income evidence | BAS, business bank statements, accountant letter, signed declaration | Lodged tax returns, notices of assessment, business financials |
| Typical maximum LVR | Usually lower, varies by lender | Usually higher, varies by lender |
| Lenders mortgage insurance | Available at some lenders only, often at a higher premium | Widely available above the lender's threshold |
| Pricing | Usually a higher rate and sometimes higher fees | Usually the lender's standard pricing |
| Lender choice | Mostly non-bank lenders and specialist funders | Major banks, non-bank lenders and tier-2 specialists |
| Path to refinance | Commonly refinanced to full doc once returns show the income | Refinanced on rate and features |
Why do alt doc home loans cost more than full doc loans?
Alt doc home loans cost more because the lender carries more uncertainty about the income, so the loan is priced for the evidence it does not have. Four drivers sit behind that, and none of them is a judgement on the borrower.
- Risk pricing. Without lodged returns and notices of assessment, the lender holds less independent proof that the income is sustainable, and it prices for that uncertainty.
- Insurance. Where lenders mortgage insurance is available on alt doc, the premium is commonly higher than on a comparable full doc loan, and some lenders lower the LVR instead of insuring.
- Fewer lenders. Most alt doc lending is written by non-bank lenders and specialist funders, so there is less price competition than in full doc lending.
- Funding cost. Non-bank lenders typically fund through wholesale and securitisation markets rather than customer deposits, and that money usually costs more.
The gap usually narrows when the file is strong on everything except the tax returns: a solid deposit, clean credit and business records that agree with each other. It widens when the evidence is thin on several fronts at once.
When should you move from an alt doc loan to a full doc loan?
You should look at moving from an alt doc loan to a full doc loan once your lodged tax returns show the income you need to service the loan, usually when two recent years carry it. At that point the reason for paying alt doc pricing has gone.
The move is a refinance, so it is assessed as a new application on full doc evidence. The timing, triggers and costs of switching are covered in when to refinance a self-employed home loan, and a worked path from a lighter document loan to full doc is in the café owner's refinance to full doc. The alt doc refinance entry explains the term, and the full self-employed path, including what goes into a full doc application, is laid out in the self-employed home loans guide.
If you are not sure which path your file fits today, check eligibility first and a broker can compare the alt doc and full doc options side by side.
An alt doc home loan rests on business records instead of personal tax returns: BAS, business bank statements, an accountant letter or a signed declaration, checked against each other. It suits a real, trading business whose returns lag behind current income. The cost of that flexibility shows up as a lower maximum LVR, a higher rate and tighter insurance, and most borrowers plan their move to full doc from the day they settle.
Key takeaway: use alt doc when your lodged returns cannot carry the application, keep your BAS and bank records clean, and refinance to full doc once two recent returns show the income.Frequently Asked Questions
Alt doc and low doc are often used for the same loan, but some lenders draw a line between them: low doc rests on a signed income declaration, while alt doc rests on BAS, business bank statements or an accountant letter. Either way, the loan verifies income without personal tax returns. How lenders read each kind of evidence is covered in how low doc lenders read income evidence.
The alt doc home loan requirements typically cover an active ABN with trading history, a clean or explained credit file, a deposit, and business records that support the income you declare. Many lenders also want GST registration. Each threshold varies by lender, and the low doc income documents guide covers the paperwork side in detail.
GST registration is required for an alt doc home loan at many lenders, because it means lodged BAS exists to verify the business's turnover. Some lenders accept a business that is not registered for GST if bank statements or an accountant letter carry the income instead. Policy varies by lender, so it is worth checking before you apply.
An alt doc home loan typically needs lenders mortgage insurance when the loan goes above the lender's LVR threshold, the same as a full doc loan. The difference is that fewer lenders offer insured alt doc loans and the premium is commonly higher. A larger deposit that keeps the loan-to-value ratio below the threshold avoids it.
Getting an alt doc home loan with a past credit default is possible at some specialist lenders, but it narrows the options because conduct carries more weight when the income evidence is lighter. A paid, older default with a clear explanation is read differently from a recent unpaid one. Your credit file is worth checking before you apply.
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