Calculator directory
Business calculators organised around real decisions
Browse 17 live calculators for pricing, payroll, GST, quoting, and cashflow checks built for Australian business operators.
What you will find
- Category pages grouped by the decision you are trying to make.
- Calculator pages with formula explanations, FAQs, and estimate-based disclaimers.
- Internal linking designed to grow into a broader guide library over time.
Browse categories
Start with the business problem you need to solve
Choose the category that best matches the pricing, staffing, tax, quoting, or planning question in front of you.
Pricing & Profit
Use practical calculators to set service prices, test margins, compare markup and margin, plan break-even targets, and pressure-test cashflow decisions before they become expensive mistakes.
Open categoryPayroll & Staff Cost
Estimate the full employer cost of a role, compare contractor and employee models, and check what a role still needs to recover once non-billable time is factored in.
Open categoryGST & Tax
Use straightforward GST tools for ex-GST and inc-GST checks, invoice sanity checks, and simple BAS set-aside planning without digging through spreadsheets.
Open categoryTradie Tools
Use tradie-focused tools to build quote totals, cost jobs properly, and check whether the quoted number still leaves enough room for profit.
Open categoryLive calculators
Popular calculators already live on BizTools.au
These are some of the most commercially useful calculators currently live on the site.
Service Pricing Calculator
Turn labour cost, overhead allocation, and a target margin into a required service price.
Open calculatorTradie Quote Calculator
Estimate a simple job quote using labour, materials, additional costs, markup, and GST.
Open calculatorEmployee Cost Calculator Australia
Estimate the real annual cost of employing someone once super, payroll tax, workers compensation, and other costs are added.
Open calculatorGST Calculator Australia
Add or remove 10% GST from an amount so you can check quotes, invoices, and pricing quickly.
Open calculatorCash Flow Runway Calculator
Estimate how many months current cash reserves can last based on average monthly expenses and revenue.
Open calculatorContractor vs Employee Cost Calculator
Compare the estimated annual cost of an employee against a contractor arrangement using simple Australian on-cost assumptions.
Open calculatorRelated guides
Guides now sit beside the calculators
These published articles add practical context around the same pricing, GST, staffing, and quoting decisions covered by the tools.
How to Price Services for Profit
Build service prices from cost, overhead, and target profit so the job still works after delivery.
Price for profitHow to Set a Sustainable Hourly Rate
Set an hourly rate that covers income goals, overheads, and real billable hours instead of copying someone else’s number.
Set your hourly rateHow to Calculate Cash Flow Runway
Measure how many months of runway the business has left based on current cash, revenue, and monthly burn.
Check your runwayLate Payment Fees on Invoices in Australia
Use late fee logic more carefully by pairing the calculator with clear payment terms and a realistic overdue process.
Review late fee logicContractor vs Employee Cost — Small Business Guide
Compare contractor and employee cost with small-business realities like workload certainty, control, and utilisation in view.
Weigh the cost trade-offsHow Tradies Should Build a Profitable Quote
Build tradie quotes with clearer labour recovery, materials, markup, GST, and job-profit checks.
Build better quotes