The Otago University Students' Association will hold a rally outside the Union building at noon.
The rally is part of a nationally co-ordinated effort from the New Zealand Union of Student Associations.
Protests are also being held at the University of Auckland and Waikato University this afternoon, as student associations voice their opposition to the Act New Zealand party's Freedom of Association Bill.
The Bill, first proposed by retiring Act MP Heather Roy, will have its third and final reading in Parliament on Wednesday, effectively rubber-stamping the demise of compulsory membership of student associations.
Student associations will face a huge drop in revenue when membership becomes voluntary, a move which is expected to threaten the provision of student services, administration, and campus facilities.
NZUSA co-president David Do said students around the country would be rallying against education cuts and threats to their "independent voice".
Students were frustrated and appalled by how the Government had ignored them, Mr Do said.
Act's "extreme" Bill would undermine independent representation on campus and put important student services at risk.
The Government had recently compounded the issue with the drafting of directions on how new service levies would be administered by universities, he said.
"These will shut down many aspects of student life and create a double whammy for students next year."
Voluntary student membership was one of the biggest threats to a strong independent student body.
It would "splinter and undermine the collective voice and contribution of students to the tertiary community", Mr Do said.
NZUSA wants the National Party to drop its support for the "extreme and inflexible" Bill.
Mr Do called on the Government to work with students on fairer alternatives for improving services and representation, rather than gutting them.
Continued underfunding to the tertiary sector had become worse, putting more pressure on institutions to raise their tuition fees when New Zealand already had the seventh-highest fees in the OECD, he said.
