APRA’s serviceability buffer, now entering its third year of enforcement, continues to reshape the borrowing capacity of self-employed applicants. When the regulator wrote to ADIs on 6 October 2021 instructing them to apply a minimum 3.0 percentage point buffer above the loan product rate, the adjustment removed roughly $60,000–$90,000 of capacity for the median sole trader. That buffer remains in place as at November 2024, even as the Reserve Bank held the cash rate at 4.10% through its November meeting. In parallel, the non-bank alt-doc sector—where lenders such as Pepper, La Trobe, and Liberty dominate—has tightened credit matrices. Pepper’s near-prime offering, for instance, pulled back maximum LVRs for company directors using BAS verification from 80% to 75% in October 2024, while Bluestone reset risk-grade pricing in September, lifting the 70% LVR rate to 8.25% p.a. for certain self-employed files.
Against this landscape, NAB’s Specialist Lending team operates as an internal channel that assesses self-employed borrowers using alternative income verification without defaulting to the risk-grade pricing common in the non-bank space. The team is not a separately branded unit; it sits inside the bank’s broker and direct distribution, applying a prescribed set of alt-doc and low-doc rules that diverge meaningfully from NAB’s standard PAYG credit policy. Understanding exactly how that team calculates income, applies haircuts, and layers LVR and pricing constraints gives a self-employed borrower a precise benchmark before committing to a fully priced alt-doc solution elsewhere. What follows is a granular breakdown of the team’s assessment framework as it stood in November 2024.
The Scope of the Specialist Lending Team
NAB’s Specialist Lending mandate covers two broad self-employed cohorts: individuals operating as sole traders or partnerships with an ABN active for at least two years, and trading companies where the borrower is a director and holds 25% or more of the equity. Trust structures with a corporate trustee follow the same director-ownership rule, although discretionary trusts require deeper scrutiny of distribution patterns. The team does not service start-ups that lack two full financial years of trading evidence, nor does it handle borrowers whose income is predominantly passive (rental yields, dividends from a non-trading entity). For those profiles, NAB routes the file to a commercial banking channel or, more commonly, declines.
Eligible Borrowing Entities
- Sole traders with an active ABN for 24 months and consistent GST registration.
- Partnerships where all partners are assessable, each satisfying the two-year rule.
- Proprietary limited companies with an ACN and a minimum 25% director-shareholder stake.
- Corporate trustees of a trading trust if the trustee company meets the directorship threshold.
An entity that falls outside these boundaries—such as a trust with an individual trustee—still qualifies if the individual can demonstrate the 24-month ABN history and suitable income evidence, but the loan purpose and security title must align. The team generally avoids granting loans to a personal name when the income is generated inside a corporate structure without a clear service agreement.
Income Verification Methods and the Alt-Doc Stack
The Specialist Lending team operates four core verification pathways. Each carries its own haircut, cap, and supporting-document requirement. The choice of pathway is not a borrower election; it is determined by the most recent financial data available and the consistency of that data.
1. Full Financials with Accountant Certification
When the borrower can supply two consecutive years of accountant-prepared profit-and-loss statements, balance sheets, and business tax returns, the team applies the same income calculation logic as a standard full-doc assessment. Net profit before tax is taken as the base, with discretionary add-backs allowed for depreciation, interest on business debts being refinanced, and one-off expenses documented in the accountant’s letter. The critical distinction is that NAB requires the accountant to issue a letter certifying the borrower’s income—a letter that must state the net profit before tax for each year, explicitly confirm the borrower’s share of that profit, and declare that the financials are true and correct. Without that wording, the file reverts to the alt-doc stream.
2. BAS-Only Verification
Self-employed borrowers who lodge quarterly BAS can present four consecutive quarters of statements, covering the most recent 12-month window, to have their income annualised. NAB’s assessor extracts total sales (G1 label) for each quarter, strips out GST, and then applies a 15% allowance for business expenses to derive a net income. That figure is then annualised. The team caps the final assessable income at the lower of that annualised BAS-derived figure or $120,000 per annum for sole traders, and $150,000 for company directors. The cap is a hard policy ceiling; it is not a guideline. For a sole trader lodging BAS showing aggregate G1 of $176,000 (GST-inclusive) over four quarters, the calculation is: $176,000 ÷ 1.1 = $160,000 in GST-exclusive sales, multiplied by 0.85 expense adjustment = $136,000 net income, which the cap trims to $120,000.
3. Accountant Letter Only
An accountant’s income declaration without full financials is accepted provided the letter meets the same certification standard, references the most recent financial year, and states a net profit before tax figure. The assessor applies a 30% haircut to that declared income to account for volatility and lack of BAS substantiation. The resulting figure is capped at $100,000 for sole traders and $130,000 for directors. If a director’s accountant certifies a net profit of $180,000, NAB will assess $126,000—immediately below the cap. This pathway is typically used when the borrower is one year into an ABN but can demonstrate seasonally strong trading through a mid-year accountant review; however, NAB still demands the two-year ABN rule, so the borrower must have been registered for at least 24 months.
4. Bank Statement Cashflow Analysis
For business owners who channel all revenue through a dedicated business transaction account, the team will accept six consecutive months of bank statements. Assessors identify consistent deposits meeting a “regularity” test—credits that recur at least monthly and show a pattern—and total them. An expense-to-revenue ratio of 30% is applied if the statements do not clearly delineate outflows. The gross deposits are annualised and then reduced to net. This pathway has the tightest cap: $80,000 for sole traders, $100,000 for directors. It is rare for a borrower to rely on this method alone; it is frequently paired with an accountant letter to lift the income floor, though the team will not double-count the same revenue stream.
Serviceability, LVR, and the Pricing Stack
NAB’s serviceability framework for the Specialist Lending team mirrors the bank’s standard home-loan calculator in structure but diverges at the income input. The assessment rate as at November 2024 is the higher of the product floor rate (8.10% p.a.) or the product rate plus APRA’s 3.0 percentage point buffer. With NAB’s basic variable alt-doc loan priced at 6.49% p.a. for owner-occupier P&I, the buffer-dominated rate is 9.49%, but the floor rate bites and sets the assessment rate at 8.10%. For an investment loan priced at 6.79%, the buffer takes the rate to 9.79%, which exceeds the floor, resulting in an assessment rate of 9.79%. Debt-to-income (DTI) is not an internally mandated cap within NAB’s policy, but the team will flag files with a DTI exceeding 7.0 times for further review, and the bank’s responsible lending framework often results in a decline above that threshold when combined with high LVR.
LVR Caps by Verification Pathway
| Pathway | Max LVR Owner-Occupied | Max LVR Investment |
|---|---|---|
| Full financials + cert | 90% (LMI applies) | 80% |
| BAS-only | 80% | 70% |
| Accountant letter only | 70% | 65% |
| Bank statement cashflow | 60% | 60% |
LVRs above 80% require LMI through Genworth or QBE, and both insurers impose an additional income validation step for self-employed files when the borrower uses alt-doc verification. In practice, that means the BAS-only pathway at 80% LVR will attract a Genworth review requiring the accountant letter as a supplement, pushing the effective maximum toward 75% for cleaner approvals.
Pricing sits between the bank’s packaged rate and a premium margin. NAB’s current alt-doc variable rate for owner-occupiers is 6.49% p.a. (comparison rate 6.71% p.a.) with a 100% offset account available on the basic loan. Investment borrowers see 6.79% p.a. (comparison rate 7.13% p.a.). There is no risk-grade surcharge, no establishment fee for the basic product, and no exit fee. That cost structure contrasts sharply with the non-bank segment. Liberty’s SuperCredit alt-doc, for example, carries a risk fee of 1.50% of the facility limit and a rate of 7.29% p.a. for the same LVR band (as at Liberty broker guide v4.0, effective 1 September 2024). La Trobe Financial’s Lite Doc option, launched October 2024, prices a 70% LVR owner-occupied loan at 7.85% p.a. with a 2.0% risk fee. NAB’s internal team therefore offers a material pricing advantage, but that advantage narrows as LVR rises because the bank’s approval friction increases.
When NAB’s Alt-Doc Stack Outweighs a Non-Bank
The decision to pursue a NAB Specialist Lending assessment instead of a fully priced non-bank product turns on three factors: LVR requirement, income volatility, and the borrower’s tolerance for policy friction. A sole trader with a clean BAS trail showing $145,000 in annualised GST-exclusive sales would land at $120,000 assessable income under NAB’s cap, yielding a borrowing capacity of roughly $510,000 at the floor rate, assuming no other debts. The same borrower applying to Resimac’s near-prime offering could obtain a 80% LVR loan at 7.59% p.a. (Resimac rate sheet, 1 November 2024) with a risk fee of 1.25%, but income verification would rely on the same BAS data with a more generous expense haircut of 10%, producing $130,500 assessable. The capacity gain is modest, yet the total cost over five years—factoring in the risk fee and 110 basis point rate spread—exceeds $23,000. So, if the borrower can tolerate the $120,000 income cap and needs LVR of 80% or less, NAB wins on lifetime cost.
Where the non-bank becomes the rational choice is at LVRs above 85% or for income profiles that NAB caps aggressively. A company director with an accountant letter declaring $200,000 net profit receives an income haircut to $130,000 at NAB, while Brighten’s alt-doc product (Brighten Product Guide v5.2, 15 October 2024) applies a flat 20% haircut, giving $160,000 in assessed income. The difference funds an additional $200,000 in property purchase price at the same assessment rate. Brighten’s rate of 7.99% p.a. and 2.0% risk fee then become the premium paid for the capacity uplift. There is no single correct path; the Specialist Lending team is a tool that works best for moderate-income, moderate-LVR self-employed borrowers who can meet the documented income thresholds without bumping against the caps.
Navigating the Application Process
Brokers report that NAB’s Specialist Lending assessment window is running at five to seven business days from lodgement to conditional approval as at October 2024, provided the documentation bundle is complete. That bundle includes: a signed application form with the specialist tick-box marked; ABN registration confirmation; two years of individual and business tax returns (if full financials pathway) or the four most recent BAS lodgements; accountant’s letter on letterhead; and six months of business bank statements for cashflow pathway. The assessor will also pull a credit report and may request the last three months of personal transaction accounts to verify living expenses, a step that can extend the review by two days.
Common Potholes Leading to Decline
- The accountant’s letter omits the phrase “true and correct” or fails to state the income attribution percentage.
- BAS statements show a material drop (>20%) in any single quarter without a documented explanation, triggering an income-sustainability query.
- The ABN registration date is within 23 months of application—the two-year rule is enforced strictly, not rounded up.
- The borrower’s HECS/HELP debt is not disclosed early, causing a late-stage DTI recalc that pushes DTI above 7.0.
Five Actionable Takeaways
- Order the accountant letter and BAS trail now, not at pre-approval. NAB’s income caps make it essential to know exactly which figure the assessor will use before you sign a contract. Commission a mid-year management accounts letter if your 2023–24 financials are soft, and compare the BAS-derived cap against the real purchase price you need.
- Price the LVR against non-bank cost over five years. For an 80% LVR owner-occupier purchase at $800,000, NAB’s 6.49% rate yields an interest cost of $207,680 over five years on a $640,000 loan, versus $243,200 at Liberty’s 7.29%—but only if you can clear the income cap. Run the numbers with your broker using current non-bank rate sheets (Liberty v4.0, Brighten v5.2, La Trobe October 2024) to see whether a higher LVR elsewhere offsets the rate spread.
- Clean the business bank statements for the six-month look-back. Erratic personal transfers labelled as loans will dilute the regularity test. Run a separate salary payment into the account at a fixed amount each month for at least three months prior to application; the assessor will treat that as a stable credit pattern.
- Get the partnership or trust structure reviewed before lodgement. If your trading trust has a corporate trustee but the income distribution to the individual is not reflected in a service agreement, NAB may treat the income as unavailable to you personally. Have the accountant draft a one-page service agreement retroactively aligned with tax returns—it will not override the caps but will prevent a structural decline.
- Use the NAB pathway as a bargaining chip with non-bank lenders. A conditional approval from NAB’s Specialist Lending team at 6.49% gives a broker leverage to negotiate a risk-fee waiver or a 10–15 basis point reduction from a non-bank. Liberty, Bluestone, and Pepper all have discretionary pricing tiers that can be engaged when a borrower holds a competitive offer.