Free Business Calculators & Tools

Australian payroll tax, super guarantee, GST, BAS deadlines and more — free tools built for AU small businesses.

9 tools available·Verified March 2026
Payroll Tax Calculator
Calculate your monthly and annual payroll tax liability across all Australian states and territories. Includes current thresholds, rates, and mental health levies.
Super Guarantee Calculator
Calculate employer superannuation guarantee contributions including the current SG rate, maximum contribution base, and Payday Super readiness timeline.
BAS Deadline Calculator
Find your next BAS lodgement and payment due dates for the 2025–26 financial year. Covers quarterly, monthly, and annual reporting periods.
Software Cost Comparison Calculator
Compare the total cost of ownership for different business software stacks. Input your team size and see monthly and annual costs across accounting, payroll, POS, and more.
Award Pay Rate Calculator
Look up minimum pay rates under common Australian Modern Awards. Includes casual loading, penalty rates for weekends and public holidays.
GST Calculator
Calculate GST amounts — add GST to a price, remove GST from a GST-inclusive price, or work out the GST component. Uses the standard Australian 10% rate.
ABN Lookup Tool
Look up an Australian Business Number to verify registration status, GST registration, entity name, and business type using the ABR.
Leave Entitlement Calculator
Calculate employee leave entitlements under the National Employment Standards. Covers annual leave, personal/carer's leave, and long service leave by state.
Payday Super Readiness Checker
Assess how ready your business is for the Payday Super changes starting 1 July 2026. Get a readiness score and action plan based on your current payroll setup.

Why These Tools Matter for Australian Businesses

Running a business in Australia means navigating a complex web of tax obligations, employment rules, and compliance requirements. From GST reporting on your BAS to calculating payroll tax thresholds that vary by state, getting the numbers wrong can lead to ATO penalties, underpayment claims, or cash flow surprises. These free calculators are built specifically for Australian businesses using current rates, thresholds, and rules published by the ATO, Fair Work Commission, and state revenue offices.

Tax & GST Tools

The GST Calculator handles the three most common GST calculations: adding 10% GST to an ex-GST price, removing GST from an inclusive price, and extracting the GST component. Essential for invoicing, quoting, and BAS preparation. The BAS Deadline Calculator shows your upcoming lodgement and payment due dates based on whether you report quarterly, monthly, or annually. Late lodgement penalties start at $313 per 28-day period, so knowing your dates is critical for avoiding unnecessary costs.

Payroll & Employment Tools

The Payroll Tax Calculator estimates your liability across all eight states and territories, each with different thresholds ranging from $900,000 in Victoria to $2,000,000 in the ACT and rates from 4% to 6.85%. The Super Guarantee Calculator works out employer super contributions at the current 12% SG rate, factoring in the maximum contribution base of $65,070 per quarter. The Award Pay Rate Calculator looks up minimum pay rates under common Modern Awards including casual loading at 25% and penalty rates for weekends and public holidays.

The Leave Entitlement Calculator covers annual leave, personal and carer’s leave, and long service leave which varies by state from 7 years qualifying service in Victoria and the ACT to 10 years in most other states. The Payday Super Readiness Checker assesses whether your payroll setup is ready for the Payday Super changes taking effect 1 July 2026, when super must be paid on or before each payday rather than quarterly.

Business Tools

The ABN Lookup Tool verifies Australian Business Numbers against the official ABR database. Check a supplier’s registration status and GST registration before paying — if they cannot provide a valid ABN, you may need to withhold 47% from the payment under the no-ABN withholding rules. The Software Cost Comparison Calculator estimates total cost of ownership for business software across categories like accounting, payroll, POS, CRM, and job management, based on your team size and plan tier.