Inland Revenue is proposing a standard nightly amount people who rent out their property as short-term accommodation can claim as costs.
The proposed amount is $50 a night if the host is the home owner and $45 a night if the host rents the property. They may qualify if the space is rented for up to 100 days each year, IRD said.
The tax department is seeking feedback from the public on the proposal.
IRD director of public rulings Susan Price said renting out a property as short-term accommodation qualifies as income and therefore needs to be included in a tax return.
"People renting out a room in their home can claim costs like advertising and a proportion of the expenses for the time the space is rented including things like rates, insurance and cleaning," Price said.