Question 1

How do I calculate markup for parts and materials?

Accepted Answer

Markup is added to your cost price to arrive at a sell price. For example, a 50% markup on a $100 part gives a sell price of $150. TopTradie.Tools includes tiered parts markup calculators that automatically apply different rates based on part cost — common practice in workshops and trade businesses.

Question 2

What is the GST rate in Australia in 2025?

Accepted Answer

The Goods and Services Tax (GST) rate in Australia is 10%. To add GST, multiply by 1.1. To find the GST component of a GST-inclusive price, divide by 11. Our GST calculator handles both directions instantly.

Question 3

How do I calculate my hourly rate as a sole trader tradie?

Accepted Answer

To set your hourly rate, divide your total annual costs (wages, super, insurance, tools, vehicle, overheads) by your billable hours, then add a profit margin. TopTradie.Tools has a dedicated hourly rate calculator that steps you through each cost component.

Question 4

What is the superannuation rate for 2025–26?

Accepted Answer

The Superannuation Guarantee (SG) rate for FY2025–26 is 12% of ordinary time earnings. This is the minimum employers must contribute. Our super calculator and True Labour Cost calculator both use the current 12% rate.

Question 5

How do I work out PAYG withholding for an employee?

Accepted Answer

PAYG withholding is calculated using ATO tax tables (NAT 1008). The amount depends on the employee's gross pay, pay period, and which tax scale applies — Scale 1 for residents who have claimed the tax-free threshold, Scale 2 for those who haven't, and Scale 4 when no TFN is provided. Our PAYG Withholding Calculator applies the correct FY2025–26 rates automatically.

Question 6

How many bricks do I need per square metre?

Accepted Answer

Standard Australian bricks (230×110×76mm) require approximately 50 bricks per square metre at 10mm joints. Our Brick Quantity Calculator accounts for wall dimensions, bond type, waste percentage, and mortar ratios.