Low‑Doc vs Full‑Doc For Self‑Employed: The Pivot That Saves You Six Figures

Low‑doc isn’t the problem. Getting stuck in low‑doc is.

Low‑doc and alt‑doc loans exist for a good reason: self‑employed borrowers often don’t have neat PAYG payslips or freshly lodged tax returns. But the mistake I see most is this: someone takes an expensive low‑doc loan as a “short‑term fix”, then three to five years later they’re still there, paying a quiet premium and wondering why cashflow feels so tight.

In simple terms, low‑doc loans let you prove income with alternatives like BAS or bank statements instead of full tax returns, but you usually pay higher rates, fees and get lower maximum LVRs. Full‑doc loans rely on lodged tax returns and full financials, but reward you with sharper pricing and more lender choice. The decision isn’t just "which one now?" – it’s "how do I move from low‑doc to full‑doc as soon as it’s safe?".

Here’s how I help clients decide whether to use low‑doc, when to hold, and when to switch.

A 30‑second decision snapshot

If you only have time for one quick answer this week, use this:

1. Use (or stay in) low‑doc when:

• You must act in the next 3–6 months (expiring lease, opportunity, divorce settlement etc.), and
• Your last two years’ lodged tax returns don’t show the income you genuinely earn, and
• You can comfortably afford a rate that’s ~0.7–2.0% p.a. higher than good full‑doc deals and still keep at least 6–12 months of repayments plus living costs in cash/offset.

2. Push hard to go full‑doc when:

• You can wait 6–18 months to buy or refinance, and/or
• With targeted tax planning, your next returns will show sustainable income, and
• You’re willing to trade a bit more tax for much better rates and long‑term borrowing power.

3. Switch from low‑doc to full‑doc when:

• Your tax returns now show realistic profit or salary to yourself,
• You’ve got at least 10–20% equity, and
• The refinance will either reduce your rate by ≥0.5–0.7% p.a. or de‑risk your structure (e.g. from interest‑only to principal and interest, or from private lender to mainstream).

For a deeper look at how the rate and fee gap really works, I’ve broken down the numbers in What Self‑Employed Borrowers Really Pay On Low‑Doc vs Full‑Doc Loans.

Low‑Doc vs Full‑Doc: How They Really Differ

Documentation and proof of income

Full‑doc home loan (standard lending):

• Two years of personal tax returns and Notices of Assessment
• Two years of business returns and financials if you trade via a company or trust
• Sometimes year‑to‑date management accounts
• Lenders average or shade the last 2 years’ income, with policy‑specific rules.

Low‑doc / alt‑doc home loan:

• ABN and often GST registration history (e.g. 1–2+ years)
• Income verified via:
  • BAS statements (usually 4 quarters) or
  • 6–12 months business bank statements or
  • Accountant’s declaration letter
• Often only one income method is used to avoid “shopping” for the highest figure.

I go deeper into practical income evidence in Using BAS, Bank Statements and Accountant Letters To Prove Income On a Low‑Doc Home Loan.

Pricing, LVRs and risk premium

Most self‑employed borrowers won’t see the full risk premium in a comparison table; it shows up in three ways:

1. Higher interest rate: Typically 0.7–2.0% p.a. above sharp full‑doc offers (indicative only, varies by lender and risk).
2. Lower maximum LVR: Full‑doc might offer up to 95% with LMI (in specific cases), but low‑doc/alt‑doc is more often capped around 60–80% LVR, sometimes 85% in niche policies.
3. Tighter terms: More interest‑only periods, annual reviews, or risk fees instead of LMI.

Here’s an illustrative comparison:

These settings exist because lenders see undocumented or partially documented income as higher risk – especially in a world where the RBA cash rate is sitting around 4.4–4.5% in its central scenario and mortgage stress is at an 18‑year high according to Roy Morgan.