I joined a research project under the assumption that I would be billing them as a contractor (job is nearing the end). However, they are now saying that I should be paid as a casual employee. Their reasoning is that there is another person with similar duties to me who will be employed as a casual staff member (they don't have an ABN) and "It would be hard to justify 2 types of engagement, based on the same work.". AFAIK, this person did not do any field work whereas I have. I didn't have set hours, used my own equipment, ever even met them in person… I have not billed them and they have not put me on the books yet to get any type of compensation yet.
Do I have any options or recourse? I would like to bill them instead of engaging as a casual. I don't have a contract either of employment condition as it was agreed from my expertise that they needed me. That would be my bad in hindsight.
Why would you have started any sort of work without a contract in place? These sort of things should be agreed in written form with both parties signing the paper before work commences.