When it comes to politics, it’s often about more about who we hate the least, rather than who we like the most.

Though it might sound cynical, it is one of the reasons why we have preferential voting.

According to Dr Lindy Edwards, UNSW Canberra Senior Lecturer of International and Political Studies, this is particularly important as votes for minor parties are on the rise.

“No matter who you put as your first preference, at the end of the day, your vote in the lower house is going to come down to who you hated least between the Labor Party and the Liberal Party,” Dr Edwards said.

In Australia, a candidate must receive an absolute majority, or more than 50% of the primary vote to win without a reliance of preferences, but this is not usually the case.

“Generally, what happens, is lots of people vote for minor parties who get knocked out along the way and the preferences get redistributed down to Labor versus Liberal,” Dr Edwards said.

“If you don’t vote for one of the major parties as your first preference, what will usually happen is your preferences will get redistributed down through other candidates until you get to one of the major groupings or one of the major parties and then what determines who wins is who people preferred out of the last two players standing.”

This differs from ‘first-past-the-post’ system, which is used by the United States, United Kingdom, Canada and India. In these countries, the candidate with the most votes is the winner.

In Australia, the candidate who receives the most first preference votes is not always the winner, but it means every vote counts, even if you don’t vote for one of the leading candidates.

Dr Edwards said this means there is no such thing as “throwing your vote away”, rather it gives voters the chance to highlight how they feel about other parties.

“The importance of the first preference votes is they give parties a major indicator of how strongly people feel about different groups and different issues and the groups – even if they weren’t successful – they give them bargaining power with the major parties,” Dr Edwards said.

Dr Edwards said both sides of politics play close attention to where those first preferences are going.

“Labor’s very concerned with the Greens and the way that the Greens’ preferences work, and on the Coalition side, they’re very concerned about One Nation and the Shooters and Fishers and the way that their preferences will flow, so they’re very conscious of the risk of losing voters to minor parties,” Dr Edwards said.

“The preferential system is designed to make sure you get to indicate who you want most and your vote still counts in terms of which of the major parties you preferred.”