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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Run your small business with confidence
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.
100% free to read Written for Australia No jargon, no waffle
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
Buying Equipment: Test the Cash Timing First
Compare buying equipment now, delaying the purchase or paying in stages. Include setup costs and check the lowest cash balance before committing to a quote.
Can You Fund a Large Contract Before It Pays?
Map mobilisation, materials and milestone receipts before accepting a large job. Use a contract cash timeline to calculate the peak funding gap and delay risk.
Cash Conversion Cycle: Stock and Payment Terms
Calculate inventory, debtor and supplier days using one consistent period. See how the cash conversion cycle differs from the dollar value of working capital.
Cash Forecast vs Actual: Find What Went Wrong
Compare predicted and actual cash, separate timing differences from changed amounts, and roll late receipts forward once with this worked variance table.
Find Cash Tied Up in Slow-Moving Inventory
Review stock age, landed cost and realistic cash recovery. Use a practical inventory worksheet to decide what to retain, return, clear or stop reordering.
Negotiate Supplier Terms with a Cash Forecast
Use a dated cash forecast to propose supplier payment terms you can keep. Compare a split-payment request with the original bill and record the agreement.
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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