Does GST Registration Over the $75,000 Threshold Improve BAS Loan Eligibility?

From 1 July 2024, the ATO-lifted GST turnover threshold to $100,000 has reset the calculus for self-employed borrowers who rely on Business Activity Statement documentation to secure a low-doc or alt-doc home loan. This legislative shift, enacted via the Treasury Laws Amendment (2023 Measures No. 3) Act 2024, means sole traders, contractors and small-business directors previously compelled to register and lodge quarterly BAS statements can now deregister if their turnover sits below the new ceiling. For anyone whose borrowing strategy hinges on BAS-derived income, that choice cuts straight to serviceability. Lenders do not merely accept BAS statements as a paperwork formality; they treat them as a real-time, ATO-verified truth test of a business’s earning pulse. Remove the compulsory data stream and a borrower loses the clearest alt-doc pathway available.

The question, then, is whether GST registration above the $75,000 legacy threshold—and now above the $100,000 mark—genuinely improves loan eligibility, or if lenders are indifferent to the GST tagging so long as some credible income narrative exists. The answer sits in the fine print of half a dozen specialist credit policies. Pepper Money, La Trobe Financial, Liberty, Resimac, Bluestone and Brighten each calibrate their low-doc books around the presence of GST registration and the quality of the BAS trail. In a lending cycle still anchored by serviceability buffers of 1.50% to 2.00% p.a. above product rates and hard LVR caps that can shrink by 10 percentage points when a file moves from BAS-only to accountant-letter territory, the GST status is not a checkbox; it is a pricing and capacity lever.

The following analysis draws on primary legislative sources, regulatory guidance and lender policy versions as at mid‑2024. It maps exactly how the new $100,000 threshold interacts with alt-doc assessment mechanics, and what self-employed borrowers should do right now if they want to preserve the strongest possible loan file.

How the GST Registration Threshold Works and Why It Matters for Loan Files

The $100,000 turnover test from 1 July 2024

Under the A New Tax System (Goods and Services Tax) Act 1999 as amended, a business entity must register for GST if its current or projected annual turnover meets the registration turnover threshold. From 1 July 2024, that threshold moves to $100,000, up from $75,000 that stood for more than a decade. The change was legislated in Schedule 1 of the Treasury Laws Amendment (2023 Measures No. 3) Act 2024 (Cth), which received Royal Assent on 28 March 2024. The Australian Taxation Office updated its public guidance to reflect the new figure with an effective date of 1 July 2024.

For a sole trader driving a van and turning over $90,000 a year, that extra headroom means no legal requirement to lodge a quarterly BAS from 1 July 2024. Before that date, the same sole trader was inside the net and had generated at least four quarters of BAS data that a lender could request. Now, the trader can choose to deregister. Lenders do not automatically treat a recently deregistered entity as ineligible, but the credit assessment must pivot from tax-agency-verified turnover to alternative documents such as an accountant’s letter, business bank statements or an unaudited profit-and-loss declaration. That pivot almost always depresses the income figure a lender will use.

Voluntary registration and its strategic value for borrowers

The Act does not prevent an entity below the threshold from remaining registered voluntarily. Many small operators do so to reclaim input-taxed credits or to signal a formal business structure. Lenders such as Pepper Money and Brighten explicitly accept BAS statements from voluntarily GST-registered applicants, provided the registration has been maintained for a continuous period—usually 12 months—and the BAS lodgements match ATO records. A broker aware of the policy can guide a borrower to stay registered even after the 1 July 2024 change, preserving the most granular income verification available.

Without GST registration, the lender’s fallback is typically an accountant’s letter confirming gross income and net profit. While that pathway is still open at La Trobe Financial’s Alt Doc and Resimac’s Specialist range, the terms tighten. At La Trobe, an accountant-letter loan for a non-GST-registered borrower caps out at 60% LVR on a purchase, whereas a GST-registered applicant with four quarterly BAS statements can reach 70% LVR under the same product line. For a borrower aiming for a $700,000 property, that 10-point gap equates to $70,000 less equity required, or a significantly larger deposit. Voluntary registration is therefore not a compliance overhead; it is a loan-framing tool.

Lenders’ Reliance on BAS Statements in Alt-Doc and Low-Doc Assessment

The BAS-as-Proof model: turnover recalculations and serviceability buffers

When a self-employed borrower submits BAS statements, the lender does not take the reported total sales at face value. The assessor strips out the GST component. A quarterly BAS showing $33,000 in total sales inclusive of GST is re-expressed as $30,000 in net turnover (assuming a flat 10% GST rate). Lenders then annualise that net figure: four consecutive quarters with net turnover of $30,000 each yields a gross annual income of $120,000. From there, the assessor applies either a fixed expense ratio or the borrower’s own declared business expenses, with a downward adjustment if the declared net profit exceeds industry benchmarks.

Serviceability buffers are applied to the product reference rate, not the headline rate. For example, Resimac’s alt-doc credit policy (effective 1 June 2024) uses a buffer of 2.00% p.a. above the applicable variable rate for all BAS-only loans. Pepper Money’s Alt Doc product (policy version 4.2, 1 March 2024) applies a 1.50% p.a. buffer, but only if the borrower has been GST-registered for the preceding two financial years. The buffer difference alone can alter maximum borrowing capacity by 10–15% on a typical loan, making the GST status a direct input into the loan amount a borrower can achieve.

Policy snapshots: Pepper, La Trobe, Liberty, and Resimac

• Pepper Money requires the last four quarterly BAS statements from the ATO portal, with GST registration status verified against the Integrated Client Account. The policy explicitly states that if the applicant is not GST-registered, the Alt Doc option moves to an accountant-certified income route, which carries a lower maximum LVR of 70% for purchases and a 2.00% p.a. serviceability buffer (policy version 4.2, 1 March 2024).
• La Trobe Financial differentiates between GST-registered and non-registered borrowers at the product-feature level. Its “BAS-only” sub-policy, refreshed on 15 May 2024, accepts 12 months of BAS statements for GST-registered entities at up to 70% LVR (purchase) with a 1.80% p.a. buffer. For non-registered borrowers, the product downshifts to a “Sole Trader Declaration,” capped at 60% LVR with a 2.20% p.a. buffer.
• Liberty Financial’s Lite Doc (policy as at 1 April 2024) is explicit that BAS statements can only be used if the borrower’s ABN is linked to a current GST registration. Absent that, the only accepted income document is a letter from a registered tax agent or accountant confirming gross annual income, and the maximum LVR drops to 65% for metropolitan postcodes.
• Resimac Specialist Alt Doc (1 June 2024) does not mandate GST registration for BAS acceptance, but it imposes an additional 5-percentage-point LVR haircut on files where the applicant is deregistered or has never registered. A GST-registered borrower can obtain 75% LVR on a purchase, while a non-registered counterpart is restricted to 70% LVR, with the same 2.00% p.a. buffer.

GST registration as a proxy for business formality and data integrity

Credit officers treat a current GST registration as a signal that the business has a consistent reporting rhythm and is visible to the ATO’s data-matching engines. The ATO’s Single Touch Payroll and BAS lodgement cross-checks create a verifiable audit trail that reduces the lender’s fear of “undeclared income” or inflated turnover. Bluestone’s credit guide (updated 1 February 2024) notes that a GST-registered applicant presenting clean, on-time BAS lodgements may receive an unsecured risk discount, pushing the maximum LVR to 80% on its Supa Low Doc product, whereas a non-registered applicant with an accountant letter is typically capped at 75% LVR. Brighten Home Loans similarly assigns a premium to GST registration: its Alt Doc product (policy effective 15 April 2024) allows a 1.50% p.a. buffer for GST-registered borrowers, while non-registered borrowers see the buffer rise to 2.00% p.a., effectively trimming borrowing capacity by around 8% for the same declared gross income.

This behaviour is not arbitrary. The Australian Securities and Investments Commission’s responsible lending guidelines encourage lenders to use the most reliable income data available. ATO-lodged BAS statements sit at the top of the tiered verification hierarchy for the self-employed, above management accounts and well above a simple letter. GST registration is the key that unlocks that top tier.

Scenario Analysis: When Voluntary GST Registration Can Improve Loan Eligibility

Sole trader earning $90,000 — below the new threshold — what lenders see with and without registration

Consider a sole-trader electrician turning over exactly $90,000 per annum after 1 July 2024. Without GST registration, the borrower has no obligation to lodge BAS statements. The lender’s only income document is an accountant’s letter stating that the electrician generated $90,000 in gross revenue with $25,000 in business expenses, delivering a net profit before tax of $65,000. Under Liberty’s Lite Doc, the maximum LVR is 65%, and the serviceability buffer is 2.00% p.a. On a $620,000 property, borrowing capacity at a 6.00% p.a. assessment rate (product rate + buffer) with a 25-year loan term limits the loan to about $390,000, requiring a $230,000 deposit plus costs.

If the same sole trader voluntarily registers for GST and lodges quarterly BAS statements, the picture changes. The four quarterly BAS reports show consistent sales of $22,500 each (excluding GST). Pepper Money’s Alt Doc would assess gross income at $90,000 after stripping the GST, but it can apply a 1.50% p.a. buffer when the applicant has a two-year GST history. At a 5.50% p.a. assessment rate, the same borrower can service a loan of roughly $450,000, unlocking an extra $60,000 in buying power and potentially accessing an LVR of 75% on a $600,000 property with a $150,000 deposit. The delta is material for first-home buyers in outer-suburban markets.

Company director with fluctuating turnover: quarterly BAS smoothing

A company director of a small painting business that experiences lumpy contract revenue often finds that an annual accountant’s letter averages out the peaks and troughs, sometimes understating the true serviceability. With quarterly BAS statements, the lender can use the highest quarter’s turnover multiplied by four—a methodology explicitly permitted by Brighten’s Alt Doc policy if supported by a letter from the accountant explaining the seasonality. This “annualised best-quarter” approach relies entirely on the existence of quarterly BAS figures that can be reconciled against the ATO portal. A director who has deregistered after 1 July 2024 loses that option and must accept an averaged annual figure that may be 20% below the best-quarter projection.

The impact on DTI and LVR calculations for BAS-only loans

Lenders that cap the debt-to-income ratio at 6.0x for alt-doc product—Resimac, for instance, applies a hard 6.0x DTI limit on BAS-only loans regardless of LVR—will recalculate the income denominator from BAS data. If GST registration yields a higher assessed income because the lender accepts best-quarter annualisation, the DTI falls, and the borrower can access the full LVR envelope. Without that uplift, a $90,000 annual income restrict the maximum loan to $540,000 under the DTI cap even before LVR constraints bite. For a borrower targeting a $750,000 purchase, that cap may kill the deal unless the deposit exceeds $210,000. Voluntary registration can thus keep the DTI calculation viable at the margin.

Risks and Trade-offs of Using GST-Registered BAS Income for Loan Service

Turnover inflation from GST component — how lenders strip it

BAS statements report total sales inclusive of GST. An applicant who files a BAS showing $55,000 in quarterly sales may present that figure to a broker as “income,” but the lender’s assessment will strip 1/11th of the total to remove the GST component, leaving net sales of $50,000. This arithmetic is standardised across all alt-doc policies, but it can catch an unprepared borrower who has mentally counted the gross figure. A borrower with $220,000 in annual total sales thinking they carry a $220,000 income will be re-based to $200,000 by the credit team, immediately shrinking borrowing capacity. The takeaway is not to avoid GST registration; it is to understand that the assessable turnover will always be net of GST, and to structure the application narrative accordingly.

ATO data matching and the risk of discrepancy flags

Every BAS lodged with the ATO is visible to the lender via a portal snapshot or summary request. If the income declared on the loan application differs from the BAS-reported turnover, the file is flagged. Pepper Money’s policy mandates a variance explanation for any discrepancy exceeding 10%, and will request a revised accountant letter reconciling the numbers. A borrower who has voluntarily registered but never truly lodged BAS returns because they fall under the threshold will have no ATO record, defeating the purpose. For registration to work as a loan tool, the BAS must be lodged regularly and honestly. The ATO’s data-matching protocols mean that any late or amended lodgement can delay a loan approval by up to three weeks as the lender waits for an updated portal report.

Cash-flow timing and the “accruals vs. BAS lodgement” mismatch

BAS lodgements occur on a cash basis for many small businesses, while lender serviceability models are built on an accruals view. A business that invoices heavily in June but receives payment in July may show a June-quarter BAS that looks lean, reducing assessed income if the lender uses the most recent four quarters without adjustment. A GST-registered borrower can mitigate this by timing lodgements—lodging the June quarter BAS as early as possible and then immediately providing the lender with a supplementary letter explaining the cash-flow spike that fell in the next quarter. Non-registered borrowers with only an annual accountant letter cannot finesse this timing at all, because the letter reflects a static annual snapshot.

What Self-Employed Borrowers Should Do Right Now

1. Stay registered voluntarily if you were previously over $75,000 and remain under $100,000. Deregistering erases the quarterly BAS trail that lenders at Pepper, Brighten and Liberty treat as gold-standard income evidence. The immediate benefit of cutting quarterly paperwork is outweighed by a loss of LVR headroom and a rise in serviceability buffers that can reduce borrowing power by up to $60,000 on a typical loan.

2. Align BAS lodgements with your loan application window. If you plan to apply in October 2024, ensure your September quarter BAS is lodged promptly in early October, showing the strongest possible turnover quarter. Ask your accountant to prepare a reconciliation letter that allows the lender to annualise off the best quarter if the policy permits.

3. Check lender policies on deregistered or newly registered entities. La Trobe Financial, Resimac and Bluestone all treat a recent GST registration as a “watch item”—most require at least 12 months of compliance history before accepting BAS as primary income verification. If you are considering voluntary registration, start the clock early, because a fresh registration in August 2024 will not support a BAS-only application until August 2025 under the majority of policies.

4. Use an accountant letter strategically if BAS is not an option. For borrowers who cannot or will not register, an accountant-corroborated income statement can still unlock loans at 60–65% LVR with a higher buffer. The key is to ensure the letter states gross income, net profit and the basis of calculation, and that the tax agent is registered with the Tax Practitioners Board. Lenders such as Liberty explicitly require that the letter be on the accountant’s letterhead and dated within six weeks of the application.

5. Do not misread the GST component. When presenting BAS-derived income to a broker, always quote net-of-GST figures. If the loan serviceability model is built on a mistaken gross figure, the deal can fall over at credit sign-off. Work backwards from the lender’s stated buffer and LVR cap to model the maximum loan that the net turnover supports, and confirm the numbers before going to formal assessment.