Contact
Get in touch about calculators, corrections, or commercial enquiries
BizTools.au keeps contact simple. Use the site email for calculator feedback, error reports, general questions, or partnership enquiries.
Contact email
Use the site inbox below for general contact. Replace it before launch if the production mailbox changes.
hello@biztools.auContact topics
What to contact BizTools.au about
The site is intended to be useful and easy to improve, so feedback about calculator accuracy, wording, and missing workflows is valuable.
General enquiries
Use this for general questions about the site, business details, or operational queries that are not tied to a specific calculator result.
Calculator feedback and corrections
Use this for calculation issues, unclear wording, broken assumptions, or suggestions for how an existing tool could be made more useful.
Partnerships, ads, and commercial enquiries
Use this for sponsorship, advertising, referral, or partnership enquiries that fit the practical business focus of the site.
Before you email
A little context makes feedback easier to act on
If the message relates to a calculator, include enough detail for the issue to be checked properly without sending sensitive business records.
Helpful contact habits
BizTools.au is a general information site, so the most useful messages are the ones that point clearly to a page, a result, or a missing workflow.
- If the message is about a calculator result, include the page URL and the inputs you used.
- If you are reporting a problem, describe what you expected to happen and what you saw instead.
- Do not send confidential payroll records, tax file information, or sensitive client data through a general contact email.
Popular calculators
You may find the answer faster in one of these tools
If you are looking for a pricing, GST, payroll, or quote check, these pages are a good place to start before sending an enquiry.
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 calculatorGuides
You may find the answer faster in a guide
These published guide pages answer some of the interpretation questions that sit beside pricing, GST, payroll, and quoting calculators.
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