Calculators and generators for Australian sole traders, freelancers and small businesses. Free, no signup required — built by Instant Receipts.
Add 10% GST to a price, or remove GST from a GST-inclusive total using the 1/11th rule.
Work out G1, 1A (GST on sales) and 1B (GST on purchases) for your BAS lodgement.
Estimate your income tax, Medicare levy, HELP repayment, GST to set aside and take-home pay.
Calculate your ATO cents per km deduction for 2026-27 (91¢/km) and compare with the logbook method.
Work out your ATO 70 cents per hour working from home deduction and compare with actual costs.
Free tax invoice template for Australian businesses. Add ABN, logo, GST per line. Download PDF, Word or Excel.
These free calculators are built and maintained by Instant Receipts, a receipt scanning and bookkeeping app for Australian sole traders and small businesses. All tools use current ATO rates and are updated each financial year.
They are estimate tools, not tax advice. Always verify rates and thresholds at ato.gov.au before lodging.