Stamp duty is a tax imposed on numerous acquisitions, including selling real estate, cars and assets belonging to a business.
In the case of real estate, the purchaser is the one who pays the tax. It is a legal requirement for stamp duty to be paid within 30 days of the settlement date. All transfers of land, or sales of property, including gifts of property attract a duty, but there are a few exceptions to this, including:
As stamp duty isn’t a tax levied by the federal Government, the amount of stamp duty paid changes from state-to-sate. It’s worth researching the rate of your home state.
Source – https://www.raywhite.com/blog/advice-and-tips/what-is-stamp-or-transfer-duty/