Side-Hustle Tax Tracker (Australia) - How Much Tax to Set Aside | Salary + Sole Trader

NEW (24 Oct 2026): Google Sheets edition included. Your download now has the Excel workbook plus a PDF with a one-click link to make your own Google Sheets copy (same formulas, checked cell by cell against the Excel version).

Built and checked by a CPA. Every formula tested against a separate calculation. 30-day money-back guarantee.

NEW in version 1.2 (22 Oct 2026): every tab now looks and works like an app screen, not a worksheet: no gridlines or row numbers, a branded header with a one-line instruction on each tab, Home and Dashboard links, cleaner tables and clearly marked input cells. Same tested formulas: every result was checked identical to the previous version.

NEW in version 1.1: a one-page Dashboard with your side profit, the extra tax it causes, the % to set aside from each payment and what's still to set aside, plus monthly charts; a clickable Home page that takes you to every tab; and a cleaner layout throughout. Same tested formulas.

Have a job and a side business? Your salary has tax taken out; your side income doesn't. Log what you earn and spend and see roughly how much extra tax to set aside, month by month, so June doesn't bring a nasty bill.

• Income and expense logs, with business-use % for shared costs like your phone and internet
• Monthly profit and year-to-date view (July to June)
• Estimated extra tax caused by your side business, using 2026-27 resident rates and the Medicare levy
• The % of each payment to put aside, and how much you still need to set aside
• Optional GST: if you're registered, it tracks GST collected and GST credits
• Checks for missing dates or categories and rows outside the financial year

What you get: 1 Excel workbook (.xlsx). Also opens in Google Sheets (File > Import). Example rows included.

Who it's for: employees with freelance, consulting, online selling or other side income as a sole trader.

Good to know: estimates only. Losses are not offset against salary, because the non-commercial loss rules usually prevent it. Not a substitute for your tax return or BAS.

General information only, not tax or financial advice. It does not consider your personal circumstances; check with a registered tax agent. 30-day money-back guarantee: if it doesn't work for your situation, email hello.plainnumbersco@gmail.com within 30 days. We'll fix it, or refund you in full if you'd rather. This is in addition to your rights under the Australian Consumer Law, which are not excluded. Licence: for the purchaser's own use; please do not resell or share the file.Save more: buying two or more of our tools? Use code BUY2SAVE15 for 15% off orders of A$36 or more, or get all five in the Complete Australian Money Toolkit. Need something we don't sell? We build custom spreadsheets

Designed by Plain Numbers Co with the help of AI tools. Listing images are designed previews of the actual file.