Free calculator
Hourly rate calculator
Enter your hours and hourly rate, choose whether you charge GST, and get the invoice total. Decimal hours: 1.5 is an hour and a half.
1.5 = 1 h 30 min
Your invoice
$1,168.75
- 12.5 hours × $85.00
- $1,062.50
- GST @ 10%
- $106.25
- Invoice total
- $1,168.75
Billing hours
- Show hours × rate on each line, not only the total.
- Name the dates or the period the hours cover.
- Add 10% GST once you’re registered for GST; until then, charge none.
Last updated 2026-10-01. This calculator is a guide, not tax advice.
Frequently asked questions
How do I bill 45 minutes?
Enter 0.75 hours. Minutes ÷ 60 gives the decimal: 30 minutes is 0.5, 20 minutes is 0.333.
Should my hourly rate include GST?
Either can work if you’re clear, but for business clients rates are usually quoted before GST, with the GST added on the tax invoice.
What if I’m not registered for GST?
Choose “No GST”: your invoice shows no GST at all. Quote your ABN so your client doesn’t have to withhold 47%.