You should also be aware that if you carry on a business from home and you later sell your home, you will be subject to capital gains tax. The family home is normally exempt from capital gains tax. However, if a business has been carried on for a period in the home, then a proportionate part of the capital gains tax must be paid. You must also keep a record of your time spent on each job or each activity. This will form the basis for invoicing your customer.
Most home businesses base their charges on an hourly rate.
Remember that your charge-out rate must include holiday pay, sick pay, Workers Compensation insurance and superannuation.