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Module 6 of 8 · 7 min read

Self-employed income

Latest year, two-year average or the lower of the two: the same tax returns can be read three ways.

For an employee the question is “how much of this pay counts?”. For a business owner there's a question before it: which year's income? Most lenders want two years of tax returns, and the two years are rarely the same. A growing business looks very different depending on whether a lender reads the latest year, the average, or the lower of the two.

Try it

One business, three incomes

$115,000
$180,000
Latest year$180,000
Average of two years$147,500
Lower of the two$115,000

Spread between the readings: $65,000 a year, roughly $458,000 of borrowing.

Before add-backs (depreciation, interest, one-off costs, extra super), which lenders also treat differently.

Add-backs

The taxable profit isn't the end of it. Some expenses in a business's accounts don't reflect cash the owner actually lost, or won't happen again, so lenders add them back:

  • Depreciation: an accounting cost, not money out the door that year.
  • Interest on a loan that is being refinanced or paid out.
  • One-off costs, such as a legal bill or a relocation.
  • Extra super contributions above the compulsory amount.

Which add-backs a lender accepts, and whether it adds them to both years or only one, varies. So do the rules for companies and trusts, where profit can be kept in the business or split between family members.

Case study
The growing sole trader
Applicant
Single, sole trader, trading 4 years
Prior year profit
$115,000
Latest year profit
$180,000
Add-backs
None, to keep it simple
Loan
Owner-occupied purchase, 30 years
Lowest
$704k
Middle lender
$759k
Highest
$940k
Gap
$236k
Maximum borrowing, 27 lenders This borrower
  1. Lender 13$704k
  2. Lender 27$705k
  3. Lender 15$719k
  4. Lender 11$724k
  5. Lender 6$741k
  6. Lender 9$742k
  7. Lender 3$746k
  8. Lender 5$746k
  9. Lender 1$747k
  10. Lender 2$747k
  11. Lender 16$747k
  12. Lender 12$752k
  13. Lender 24$756k
  14. Lender 17$759k
  15. Lender 21$760k
  16. Lender 25$760k
  17. Lender 14$760k
  18. Lender 8$763k
  19. Lender 10$767k
  20. Lender 18$767k
  21. Lender 19$804k
  22. Lender 22$806k
  23. Lender 7$854k
  24. Lender 23$860k
  25. Lender 4$906k
  26. Lender 26$909k
  27. Lender 20$940k
Figures from each lender's serviceability calculator as rebuilt in AutoCalc, run on 22 Oct 2026. Lenders are unnamed, and the numbers are reshuffled for every case study. Rates and policy change often, so treat these as an illustration, not a quote.

The lenders at the top of this chart read the latest, higher year. Most of the rest average the two. Now switch on the “what if”: the same client, with only the latest year's return supplied. 11 lenders lend more, by up to $240k. 1 lender lends less, by as much as $370k. 1 lender lends nothing at all: one year of returns isn't enough for it. 3 lenders don't change. 11 lenders won't take the deal on one year of returns at all. Same business, same profit: whether a lender wants one year or two changes the answer, in both directions.

Takeaways

  • Lenders read two years of returns in three main ways: latest year, average, or lower of the two.
  • A rising income favours latest-year lenders; a falling one punishes them less than lower-of lenders.
  • Add-backs (depreciation, interest, one-off costs, extra super) are accepted differently by each lender.
  • When returns don't tell the story, low-doc options exist, at a price.

Check your understanding

0 of 3 answered
  1. 1. A business made $90,000 two years ago and $150,000 last year. Which reading gives the client the most income?

  2. 2. Why do lenders add depreciation back to profit?

  3. 3. Profit fell from $160,000 to $110,000. Which type of lender is most at risk of over-estimating?