Free, accurate calculators with the latest ATO rates. No signup required. Built for Australian individuals and small businesses.
Calculate your Australian tax obligations
Essential tools for Australian businesses
Salary, super, and payroll calculations
Capital gains and investment tax tools
Home loan, stamp duty, and refinancing calculators
All tax brackets, offsets, and thresholds match the latest ATO publications for FY 2025-26.
All calculators run instantly in your browser. No account, no email, no personal data collected.
Responsive design works perfectly on phones, tablets, and desktops. Calculate anywhere, anytime.
Our free tax calculators are built specifically for Australians. Whether you're an employee wanting to estimate your take-home pay, a sole trader calculating your tax obligations, or an employer working out PAYG withholding and super contributions, we've got you covered.
All calculators are updated with the latest ATO tax rates for FY 2025-26, including the Stage 3 tax cuts that took effect on 1 July 2024. The new rates reduced the 19% bracket to 16% and the 32.5% bracket to 30%, delivering tax savings for every Australian taxpayer earning over $18,200.
These tools are designed to give you quick estimates. For lodging your actual tax return or BAS, consider using OneBookPlus — our all-in-one business platform includes automated GST tracking, BAS preparation, and direct ATO lodgement for Australian small businesses.
OneBookPlus automates your invoicing, GST tracking, BAS preparation, and ATO lodgement. All in one app.
FAQ
Yes. Every tax-related calculator uses ATO rates, thresholds, brackets, and offsets current for FY 2025–26 (1 July 2025 – 30 June 2026). Each calculator's 'Sources & methodology' block links to the relevant ATO page so you can verify the figures.
Yes — every calculator and lookup tool on this page is free, with no signup, no email gate, and no usage limit. Calculations run in your browser; nothing you enter is stored or sent to a server.
No. They give you accurate ballpark figures for planning, quoting, and budgeting — but for individual returns or business decisions you should consult a registered tax agent. The income tax, salary, and tax-refund calculators don't model every offset, deduction, or HELP debt situation.
ATO published schedules (income tax brackets, Medicare levy, LITO, super guarantee rate, study loan repayment thresholds), Fair Work Australia (national minimum wage, casual loading), and ASIC for superannuation guarantee rules. Each calculator cites its source.
The most common reasons: HELP/HECS debts, study loan repayments, private health insurance rebate adjustments, capital gains, foreign income, or eligibility for offsets we don't model individually (e.g. the Senior Australians and Pensioners Tax Offset). For a complex return, the calculator is a sanity check, not a final figure.
Yes — new tools ship as we hear what Australian small businesses ask us for. Recent additions include the BAS calculator, ABN lookup, and the GST-inclusive/exclusive calculator. Suggest one via the contact page.
Last reviewed and updated: May 2026 by Bishal Shrestha
About the author
Founder & CEO, OneBookPlus
Bishal has over a decade of experience in digital marketing, web development, and small business consulting across Australia. The OneBookPlus calculators are maintained against ATO, Fair Work, and ASIC published schedules each financial year. Tax-related figures should be treated as planning guides, not as a substitute for advice from a registered tax agent.