Australian GST Calculator: Add or Remove 10% GST
Work out the GST-exclusive price, GST amount and total for an ordinary taxable sale in Australia. Choose whether your starting figure already includes GST.
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Plain-English help with the things that actually trip up Australian business owners — tax and BAS, choosing software, business structures, cash flow and getting customers.
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What we cover
Help for every part of your business
The areas where small business owners lose the most time and money — explained properly, for Australian conditions.
Starting a Business
Structures, registrations and business plans
Explore guidesFinance, Tax & Accounting
BAS, GST, cash flow and staying ATO-ready
Explore guidesHiring & People
Hiring, awards, pay and managing a small team
Explore guidesLegal & Insurance
Contracts, consumer law, insurance and staying compliant
Explore guidesSoftware & Tools
The right tools for accounting, payroll and more
Explore guidesMarketing & Growth
Get found locally and grow without a big budget
Explore guidesIndustry Guides
How to start and run specific types of business
Explore guidesWork it out
Free calculators for everyday decisions
Check GST, test a price and see how many sales will cover your costs.
Break-Even Calculator for Small Business
Find how many sales you need each month to cover operating costs, then test a profit target. Use one product, one service or a realistic average sale.
Calculate nowProfit Margin & Markup Calculator
See what you keep from each sale before overheads. Compare margin with markup, or work backwards from the margin you want to a selling price.
Calculate nowHourly Rate Calculator for Sole Traders & Freelancers
Build a rate from the income you need and the hours you can actually invoice. Adjust time off and unpaid admin to see their effect on your pricing floor.
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Start with these
Best Free Accounting Software in Australia (2026): Honest Review
Which free accounting software actually works for Australian small business in 2026? Zoho Books, Manager, Square and more, tested against GST, BAS and STP.
Customer Acquisition Cost vs ROAS: Track Marketing Profit
Learn how to calculate customer acquisition cost and ROAS, reconcile ad reports with real sales, and set a marketing budget using contribution and cash flow.
Employment Contracts: What to Include (and What's Illegal)
What to include in an Australian employment contract: pay and award, hours, probation, notice, IP, plus clauses that are void or illegal and free templates.
Facebook and Instagram Ads for Small Business: A Beginner's Guide
How to run Facebook and Instagram ads for a small business in Australia: real costs, minimum setup, audiences, creative, budgets and tracking real leads.
Home-Based Business in Australia: Council, Insurance and Tax Rules
Can you run a business from home in Australia? What councils and strata allow, why home insurance won't cover you, the 70c home office rate and the CGT trap.
How to Build a 13-Week Cash Flow Forecast (Free Template)
Build a rolling 13-week cash flow forecast in a simple spreadsheet: opening balance, weekly receipts and payments, BAS and super dates, and spotting the dip.
Why this site
Advice that fits how Australia actually works
Most small business content online is written for the US — different tax system, different laws, different software. Everything here starts from the Australian reality: the ATO, GST, ASIC, awards and super.
- Australian-specific. BAS, GST, ABNs, STP — the acronyms you actually deal with, explained without assuming prior knowledge.
- Practical first. Every guide ends with clear next steps, not theory. Checklists, comparisons and worked examples throughout.
- Dates and sources. Guides show when they were published and link to sources so you can check rules and figures before acting.
- Free and independent. No paywalls. Where we compare products we say what's good and what isn't.
New to business? Don't start with guesswork.
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